CN101261859A - Recording device, recording and playback device - Google Patents

Abstract

The present invention relates to a recording device and a recording and reproducing device. In the case of recording AV data such as AV data in a recording device and/or in the case of reproducing the data in a playback device, there is no specific constitutional step for copyright protection. Possess: an encryption means (11) for encrypting the AV data transmitted from the interface (4); a control means (14) for controlling to record the encrypted AV data; Recording means (15) for recording the AV data on the disk, the control means (14) controls so that the recorded data is played back, the recording means (15) is controlled by the control means (14) and plays back the data recorded on the disk The data decryption means (12) decrypts the replayed data and sends it to the interface.

Description

Recording device, recording and playback device

This application is a divisional application of Chinese invention patent application No. 200510096618.3. The international filing date of this application is December 26, 2000, the international application number is PCT/JP00/09260, and the Chinese national filing date is December 26, 2000. , Application No. 00819187.5, a divisional application of the patent application titled "Recording Device, Playback Device, Data Processing Device, Recording Playback Device, Data Sending Device".

technical field

The present invention relates to a recording device for recording data, a reproducing device for reproducing data, a data processing device for moving or duplicating data recorded on a recording medium, and a recording and reproducing device for recording and reproducing the above-mentioned moved data device, a data transmission device that transmits a data stream composed of a plurality of data, a recording device and a recording and reproducing device for dubbing and reproducing content broadcasted by television broadcasting or the like after a predetermined time delay.

Background technique

Copyright protection is necessary when dealing with data that requires copyright protection, such as newly aired movies, pay-per-view TV programs, and music. As an effective method for protecting copyrights, there is a method of encrypting data that must be protected for copyrights to restrict data use.

For example, when transmitting video and audio data (hereinafter referred to as AV data), if it is necessary to protect the copyright of the AV data, the AV data is encrypted and transmitted. As such an example, the IEEE1394-DTCP (Digital Transmission Protection, Digital Transmission Protection) system is standard.

IEEE 1394 uses a high-speed bus system for serial transmission, and since it can transmit data synchronously, it can transmit AV data and the like in real time. Such IEEE1394 is implemented as an external interface in various digital video and audio equipment such as digital AV equipment for home use.

According to the IEEE1394-DTCP method, when data is transmitted through the IEEE1394 bus, it has an authentication function and a key invalidation function, and the data requiring copyright protection such as AV data is encrypted and transmitted, thereby realizing copyright protection.

In addition, with the popularization and development of personal computers, recording devices such as hard disk devices and playback devices are often used as external storage devices due to their large capacity and high speed. Furthermore, recent hard disk devices can be used not only in computers, but also in digital AV equipment for recording and reproducing video and audio through digital technology, and utilize their high-speed and large-capacity characteristics.

In this way, creators of movies have always considered not to allow a third party to freely copy the data they produced. Here, in order to protect the copyright, there are two types of data, one is data that is prohibited from being copied to another recording medium, and the other is data that is allowed to be copied once.

For example, when such data is copied and stored in an HDD, it is reproduced only on the HDD.

Also, as one of the viewing methods of television broadcasting, the broadcasted program is temporarily stored in a recording device such as a VTR, and then the recorded data is played back, so that the program can be viewed at a time different from the original broadcasting time. This method is often used.

Especially for the recording device, when using a recording medium that is randomly accessible such as a hard disk and can be recorded and played back at the same time, compared with the previous VTR that uses a tape medium, it can realize transcription and playback in a narrow sense, that is, within the broadcast time of the program. Even after only a little delay, the content of the program will not be missed and viewing can be performed continuously.

Fig. 43 is a structural diagram showing a conventional recording and reproducing apparatus for dubbing and reproducing. As shown in the figure, the recording and reproducing means 2120 is a means for recording and reproducing broadcasts from the outside, the recording medium 2130 is realized by a hard disk, etc., and stores broadcast data, and the switching means 2160 is for receiving data from the recording and reproducing means 2120 input and external broadcast input and select any one to output to an external display.

Hereinafter, an example of a conventional recording and reproducing apparatus having the above-mentioned structure will be described.

First, when the viewer watches a program in real time, the switching means 2160 sets so that the external broadcast is output to the display as it is, while the recording and reproducing means 2120 records the same program content on the recording medium 2130 .

Then, when the viewer temporarily leaves the front of the display and then returns to the front of the display again to start watching the program again, the recording playback means 2120 replays the recorded data from the moment the viewer leaves the front of the display, and the switching means 2160 sets , so that the input from the recording and reproducing means 2120 is output to the display. Thereafter, the viewer watches the playback output from the recording and playback means 2120 as a program to watch.

In the above operation, the recording/playback means 2120 simultaneously records the broadcast from the outside while playing back the data. That is, the recording/reproducing means 2120 simultaneously reproduces and records data.

Thus, even if the viewer has to temporarily suspend the viewing while watching the program broadcast in real time, the viewer can only delay the interruption time of the viewing without interrupting the content of the program and continue watching.

However, similar to the case of transmitting AV data, when recording and/or reproducing AV data requiring copyright protection on a recording medium such as a hard disk device, a copyright protection component must be provided. However, when recording and/or reproducing AV data requiring copyright protection to a recording device and/or a reproducing device, how to perform copyright protection has not been specifically determined.

Furthermore, not only AV data, but computer programs such as file data and game software transmitted from the Internet may require copyright protection similarly to AV data. However, in the case of recording/reproducing the above-mentioned data requiring copyright protection to a recording device and/or a playback device, how to protect the copyright has not been specifically determined.

That is, there is a problem that there is no specific constitutional link for copyright protection when data such as AV data, file data, and computer programs are recorded in a recording device and/or are played back by a playback device.

Also, when the data recording remaining capacity of the above-mentioned HDD decreases, it is necessary to rewrite new data on the data already recorded on the HDD or delete part of the data already recorded on the HDD to increase the remaining capacity. However, when the user of the HDD does not wish to write or delete data on the data already recorded on the HDD, it is sometimes considered to copy the data recorded on the HDD to another recording medium.

On the other hand, as described above, duplicating the data recorded on the HDD regardless of the copyright is troublesome for the copyright holder.

That is, when data requiring copyright protection is recorded on a recording device such as an HDD, there is a problem that the user cannot copy the data to another recording medium.

In addition, programs that are broadcast using various broadcast formats such as cable TV and CS broadcasting and signal digitization also have problems with copyright. By including copy protection in the signal, programs that can be broadcast have been preset and cannot be used. for copied records.

However, in the conventional recording/reproducing apparatus, for dubbing and reproducing a program in consideration of the above-mentioned copyright, the program is recorded on the recording medium 2130, which may cause infringement of the program copyright.

In other words, if dubbing and playback is performed for a program for which copyright protection is required, there is a problem that the copyright of the program may be violated.

As measures for avoiding this problem, the following methods can be considered. That is, (1) Limit the time during which transcription can be performed. (2) Prevent the content of the broadcast from being completely preserved.

Contents of the invention

In view of the above problems, an object of the present invention is to provide a recording device and a playback device capable of protecting copyright when recording data requiring copyright protection and/or when reproducing data requiring copyright protection.

Also, in view of the above problems, the present invention aims to provide a data processing device capable of moving or duplicating data prohibited from copying to another recording medium while protecting copyright, and recording data from the data processing device to the recording medium. Or a recording and playback device that performs playback while recording, an encrypted data decryption recording device system that protects copyright and backs up data in advance, and a decryption recording device that constitutes the system, and a data transmission device that protects copyright and transmits data.

Also, in view of the above problems, the present invention aims to provide a recording device and a recording/reproducing device capable of avoiding infringement of copyrights during dubbing and reproducing that is viewed later than the original broadcast time.

In order to solve the above-mentioned problems, a first aspect provides a recording device including: a control means for controlling to record encrypted data transmitted from an interface; and recording the encrypted data under the control of the control means. means of recording onto a platter.

According to a second aspect, a playback device is provided, comprising: a control means for controlling playback of encrypted data recorded by a recording device on a disc, wherein the recording device is provided with: a device for encrypting data transmitted from an interface encryption means; control means for controlling so that the encrypted data is recorded; recording means controlled by the control means and record the encrypted data on the disc, the encryption means adopts continuous access with the control means The minimum unit of the recording means is the recording unit information of the inherent number and/or mark of the recording block corresponding to the recording unit, encrypting the data; the playback means of controlling and replaying the data by the control means; and a decryption means for decrypting the replayed data and sending it to the interface, the decryption means decrypting the replayed data by using the recording unit information.

A third aspect is the playback device according to the second aspect, wherein encrypting the data using the recording unit information is to encrypt the data using a key obtained from the recording unit information, the Decryption means decrypts the reproduced data with a key obtained from the recording unit information.

A fourth aspect provides a playback device, comprising: a control device for controlling to play back encrypted data recorded on a disc by a recording device, wherein the recording device has: an encryption device for encrypting data transmitted from an interface; means; control means for controlling so that the encrypted data is recorded; recording means for recording the encrypted data on the disc controlled by the control means, and the encryption means will be appended with copy data encryption of permission information, the control means controls the recording means so that the recording means records the copy permission information before recording the data and/or after recording the data, the control means controls the recording means so that said recording means records said copy permission information only after recording said data; said control means controls, reproduces said data playback means; and said reproduced data Decryption means for decrypting and transmitting to the interface, when recording the data, when the copy permission information cannot be normally recorded in the recording means, the decryption means assumes that the copy permission information takes various values And try to decrypt all or part of the encrypted data, and when the result of the decryption trial is that the replayed data can be decrypted normally, use the value of the copy permission information to convert the Decrypt the replayed data.

A fifth aspect provides a playback device, comprising: a control device for controlling to play back encrypted data recorded on a disc by a recording device, wherein the recording device has: a control device for recording encrypted data control means; and recording means controlled by the control means and recording the encrypted data on the disc; and replay means controlled by the control means to replay the data, and The data is sent to the interface.

A sixth aspect provides a recording device comprising: encryption means for encrypting data transmitted from an interface; control means for controlling to record the encrypted data; The recording means for recording the data on the disc, the interface, the encryption means and the control means are integrated on the same printed substrate.

A seventh aspect is the recording device according to the sixth aspect, wherein the interface, the encryption means, and the control means are formed as one chip.

An eighth aspect is the playback device according to any one of the second to fourth aspects, wherein the interface, the decryption means, and the control means are integrally provided on the same printed circuit board.

A ninth aspect is the recording device according to the eighth aspect, wherein the interface, the decryption means, and the control means are formed as one chip.

A tenth aspect is the recording device according to the sixth aspect, wherein the signals detected from the terminals on the printed board are completely encrypted and/or described in a non-public format, and the terminals on the printed board output Information that can be reproduced as data by a third party.

The eleventh aspect is the recording device according to the eighth aspect, wherein the signals detected from the terminals on the printed board are completely encrypted and/or described in a non-public format, and the output of the terminals on the printed board is represented by The third party can be used as information for data playback.

A twelfth aspect is the recording device according to the sixth aspect, wherein the properties of the terminals on the printed circuit board are determined in a non-disclosed format, and the output of the terminals on the printed circuit board can be reproduced as data by a third party. put the signal.

A thirteenth aspect is the recording device according to the eighth aspect, wherein the properties of the terminals on the printed circuit board are determined in a non-public format, and the output of the terminals on the printed circuit board can be reproduced as data by a third party. put the signal.

A fourteenth aspect is a recording device comprising: encryption means for encrypting data transmitted from an interface; control means for controlling to record the encrypted data; The recording means for recording the data on the disc, the data transmitted from the interface, is appended with copy permission information, and the control means, under specified conditions, even if the copy permission information of the data indicates that copying is prohibited In the case of , control can also be performed so that the recording means records the data.

A fifteenth aspect is the recording device according to the fourteenth aspect, wherein the predetermined condition is that the recorded data cannot be reproduced after a predetermined time.

A sixteenth aspect is the recording device according to the fourteenth aspect, wherein the predetermined condition is that the recorded data cannot be reproduced due to charging conditions.

A seventeenth aspect is the playback device according to any one of the second to fifth aspects, wherein copy permission information is added to the data transmitted from the interface, and the control means, under a predetermined condition, Even in a case where the copy permission information of the data indicates copy prohibition, control can be performed so that the playback means plays back the data at least once.

Claim 18 is the playback device according to Claim 17, wherein the predetermined condition is that the recorded data cannot be reproduced after a predetermined time.

A nineteenth aspect is the reproduction/recording device according to the seventeenth aspect, wherein the predetermined condition is that the recorded data cannot be reproduced due to charging conditions.

Claim 20 is the playback device according to any one of claims 2 to 5, wherein copy permission information is added to the recorded encrypted data, and the control means, under a predetermined condition, In the case where the copy permission information of the data indicates that only one copy is permitted, the copy information of the data copied once by the recording means is made to indicate that only one more copy is permitted, and control So that the playback means can only copy and output the data once.

A twenty-first aspect is the recording/reproducing apparatus according to the twenty-first aspect, wherein the predetermined condition is that the data is deleted or the data is The key used in the encryption.

Claim 22 is the playback device according to claim 20, wherein the predetermined condition is that the recording target of the data to be copied and output only once is a device that records the data for backup.

Claim 23 is the reproducing device according to Claim 22, wherein the data recorded at the recording destination as a backup cannot be reproduced at the recording destination.

A twenty-fourth aspect is the reproducing apparatus according to the twenty-second aspect, wherein the data recorded as a backup at the recording destination cannot be reproduced unless returned to the original reproducing apparatus.

A twenty-fifth aspect is a data processing device comprising at least moving means for moving data recorded in a data-recording recording medium to another recording device, wherein the data to be moved by the moving means is copy-prohibited data for which copying is prohibited In a case where the copy prohibition data is at least output from the data processing device, it is encrypted with an encryption key unique to the data processing device.

A twenty-sixth aspect is a data processing device comprising at least copying means for copying data recorded in a data-recording recording medium to another recording device, wherein when the data to be copied by the copying means is copy-prohibited In the case of data, the copy-prohibited data is encrypted with an encryption key unique to the data processing device at least when output from the data processing device.

A twenty-seventh aspect is the data processing device according to the twenty-fifth or twenty-sixth aspect, further comprising encryption means for encrypting the copy prohibition data with the encryption key.

A twenty-eighth aspect is the data processing device according to the twenty-fifth or twenty-sixth aspect, further comprising playback means for decoding the copy prohibition encrypted with the encryption key using the encryption key. data and replays the copy prohibition data.

A twenty-ninth aspect is the data processing device according to the twenty-eighth aspect, wherein the reproduction means is a means for reproducing the copy-prohibited data at a necessary speed when the user watches, and further includes storage means, and the storage means means, when the copy prohibition data encrypted with the encryption key is transmitted from the other recording device at a speed faster than that required by the user for viewing, Store the copy prohibition data transmitted at a faster speed, and the playback means can reproduce the copy prohibition data stored in the other recording device when the storage means stores the copy prohibition data transmitted from the other recording device. The copy prohibition data in the storage means or data previously stored in the storage means.

A 30th aspect is the data processing device according to the 25th or 26th aspect, wherein the other recording device is a device capable of recording data on a second recording medium, and further includes a device for judging whether the second recording medium is compatible with the second recording medium. means for judging a recording medium corresponding to the data processing device, and the moving means or the copying means, when it is judged by the judging means that the second recording medium is a recording medium corresponding to the data processing device, Copying above prohibits data movement or copying.

A 31st aspect is the data processing device according to the 25th or 26th aspect, wherein the other recording device is a device capable of recording data to a second recording medium, and further includes a function for judging whether the other recording device is the same as the data processing device. means for judging the device corresponding to the device, the moving means or the copying means moves the copy prohibited data when it is judged by the judging means that the other recording device is a device corresponding to the data processing device or copy.

A thirty-second aspect is the data processing apparatus according to the twenty-fifth or twenty-sixth aspect, wherein when the moving means or the copying means moves or copies the copy-prohibited data, the copy-prohibited data is regarded as copyable only once. data output.

A 33rd aspect is a recording/reproducing apparatus, comprising: recording the copy prohibition data encrypted with the encryption key output from the data processing apparatus according to the 25th or 26th aspect on a second recording medium. means of recording.

A 34th aspect is a recording/reproducing apparatus, further comprising recording means for recording the copy prohibition data encrypted with the encryption key output from the data processing apparatus according to the 28th aspect on a second recording medium. Means: transmission means for transmitting the copy-prohibited data encrypted with the encryption key recorded on the second recording medium to the data processing device while being encrypted with the encryption key.

A 35th aspect is a recording/reproducing apparatus, further comprising a recording medium for recording the copy prohibition data encrypted with the encryption key output from the data processing apparatus according to the 30th aspect on a second recording medium. Means: transmission means for transmitting the copy prohibition data recorded on the second recording medium and encrypted with the encryption key to the data processing device while being encrypted with the encryption key.

A 36th aspect is a recording/reproducing apparatus, further comprising a recording medium for recording the copy prohibition data encrypted with the encryption key output from the data processing apparatus according to the 31st aspect on a second recording medium. Means: transmission means for transmitting the copy prohibition data recorded on the second recording medium and encrypted with the encryption key to the data processing device while being encrypted with the encryption key.

A 37th aspect is a recording/reproducing apparatus, comprising: recording the copy prohibition data encrypted with the encryption key output from the data processing apparatus according to the 25th or 26th aspect on a second recording medium. recording means; and decoding and reproducing means for decoding the copy-prohibited data encrypted with the encryption key recorded on the second recording medium by using the encryption key and reproducing the copy-prohibited data.

A thirty-eighth aspect is the recording and reproducing device according to the thirty-seventh aspect, further comprising: key reproducing means for reproducing an encryption key recording medium on which the encryption key is recorded; key storage means for reproducing the encryption key, and the deciphering replay means replays the copy prohibition data using the encryption key stored by the key storage means.

A thirty-ninth aspect is the recording/reproducing apparatus according to the thirty-seventh aspect, further comprising: receiving means for receiving the encryption key transmitted from the data processing apparatus, and the decoding and reproducing means utilizes the The receiving means receives the encryption key to replay the copy prohibition data.

A 40th aspect is a data processing device comprising at least moving means for moving data recorded in a recording medium on which data is recorded to another recording device as data in a format decipherable by another recording device, The data to be moved by the above-mentioned moving means is copy-prohibited data that is copy-prohibited.

A forty-first aspect is a data processing device, comprising at least copying means for copying data recorded in a recording medium on which data is recorded to another recording device as data in a format decipherable by another recording device, The data to be copied by the above-mentioned copying means is copy-prohibited data which is copy-prohibited.

Claim 42 is the data processing device according to claim 40 or 41, wherein the data in a form decipherable by the other recording device is unencrypted data or encrypted with a key unique to the other recording device. data, or data encrypted with a key attached to the second recording medium of the other recording device.

A forty-third aspect is the data processing device according to the forty-second aspect, wherein the data in a format decipherable by the other recording device may be data in a format adopted by the other recording device.

Claim 44 is the data processing device according to claim 40 or 41, wherein the other recording device is a device capable of recording data on a second recording medium, and further includes a device for judging whether the second recording medium is compatible with the second recording medium. means for judging a recording medium corresponding to the data processing device, and the moving means or the copying means, when it is judged by the judging means that the second recording medium is a recording medium corresponding to the data processing device, Copying above prohibits data movement or copying.

A forty-fifth aspect is the data processing device according to the forty-fourth aspect, wherein when a key indicating that the second recording medium is a recording medium corresponding to the data processing device is attached to the second recording medium , the judging means uses the key to perform the judgment, and further includes: when the judging means judges that the second recording medium is a recording medium corresponding to the data processing device, using the key to The encryption means for encrypting the copy-prohibited data, and the moving means or the copying means moves or copies the encrypted copy-prohibited data.

Claim 46 is the data processing device according to claim 40 or 41, wherein said other recording device is a device capable of recording data on a second recording medium, and further comprises a function of judging whether said other recording device is compatible with said other recording device. The means for judging the device correspondence of the data processing device, the moving means or the copying means, when it is judged by the judging means that the other recording device is a device corresponding to the data processing device, the copy prohibition data Move or copy.

A forty-seventh aspect is the data processing apparatus according to the forty-sixth aspect, wherein when the other recording apparatus has an encryption key indicating a device corresponding to the data processing apparatus, the determining means uses the encryption key performing the determination, further comprising: encryption means for encrypting the copy prohibition data using the encryption key when the determination means determines that the other recording device corresponds to the data processing device, the The moving means or the copying means move or copy the encrypted copy-prohibited data.

Claim 48 is the data processing apparatus according to claim 40 or 41, wherein when said moving means or said copying means moves or copies said copy-prohibited data, the copy-prohibited data is regarded as copyable only once. data output.

A forty-ninth aspect is a recording/reproducing apparatus, wherein it is a recording/reproducing apparatus for recording and reproducing the copy prohibition data from the data processing apparatus according to the forty-first or forty-first aspect on a second recording medium, The copy prohibition data is unencrypted data, comprising: an encryption means for encrypting the copy prohibition data using an encryption key attached to the second recording medium or an encryption key unique to the recording/reproducing device; Recording means for recording the copy prohibition data encrypted by the encryption means on the second recording medium; using the encryption key to decode the encrypted copy data recorded in the second recording medium. A replay method that prohibits data and replays it.

A 50th aspect is a recording/reproducing apparatus, wherein it is a recording/reproducing apparatus that records and reproduces the copy prohibition data from the data processing apparatus according to the 40th or 41st aspect on a second recording medium, The copy prohibition data is data encrypted with a key unique to the recording/reproducing apparatus or encrypted with a key attached to the second recording medium, and includes: encrypting the encrypted copy prohibition data recording means for recording data on the second recording medium; reproducing means for decoding and reproducing the encrypted copy prohibition data recorded on the second recording medium by using the key.

Claim 51 is the data processing device according to any one of Claims 25, 26, 40, or 41, further comprising charging information transmitting means for moving the data through the moving means. or when the copying means copies the data, the charging information corresponding to the movement or copying of the data is sent to the management device that manages the data processing device.

Aspect 52 is the data processing device according to any one of aspects 25, 26, 40, or 41, wherein when it is confirmed that at least one device for When moving or copying the copy-prohibited data to a management device capable of charging, the moving means or the copying means moves or copies the copy-prohibited data to the other recording device.

A fifty-third aspect is an encrypted data decryption recording device system, comprising: a plurality of recording devices for encrypting and respectively recording copy-prohibited data having the same content and for which copying is prohibited; and a decryption recording device having decryption means and recording means , the decryption means decrypts the encrypted copy prohibition data output from the plurality of recording devices, and the recording means records encrypted or unencrypted copy prohibition data having the same content as the copy prohibition data .

A fifty-fourth aspect is a decryption recording device, wherein decryption means is provided for decrypting the encrypted copy-prohibited data output from a plurality of recording devices that encrypt and separately record the copy-prohibited data of the same content; Means for recording encrypted or unencrypted copy-prohibited data having the same content as the above-mentioned copy-prohibited data.

A fifty-fifth aspect is a recording device, wherein the recording device is one of a plurality of recording devices for encrypting and separately recording copy-prohibited data of the same content and copy-prohibited, and includes: recording the encrypted data. recording means for the copy prohibition data; output means for outputting the encrypted copy prohibition data recorded in the recording means, and the encrypted copy prohibition data output from the output means is only when at least the The decryption means for decrypting the encrypted copy-prohibited data decrypts the decrypted data in the recording device.

A fifty-sixth aspect is a data transmission device, comprising transmission means for transmitting a data stream composed of a plurality of data, the data stream or the plurality of data in each block constituting the data stream are, if For data that cannot be reproduced unless the temporally preceding data of the data is reproduced, the transmitting means uses the time-wise sequence of the plurality of data in the data stream or in each block constituting the data stream The respective data are transmitted in order from the last to the front.

A fifty-seventh aspect is a recording device, wherein the recording device is a recording device capable of dubbing and reproducing copy-restricted content composed of data set to prohibit or restrict copying, and includes: a recording medium of the copy-restricted content; recording means for recording data to the recording medium, the recording means recording the copy-restricted content on the recording medium, from the start of recording the copy-restricted content, After a predetermined time has elapsed, the data of the copy-restricted content recorded on the recording medium is rendered in a state where viewing cannot be performed.

Claim 58 is the recording device as set forth in Claim 57, wherein the viewing disabled state is realized by deleting the data of the copy-restricted content.

A fifty-ninth aspect is the recording device according to the fifty-seventh aspect, wherein the viewing disabled state is realized by not deleting the data of the copy-restricted content.

Claim 60 is the recording device as set forth in claim 57, wherein the view-disabled state is realized by disabling playback of data of the copy-restricted content.

Claim 61 is the recording device as set forth in claim 60, wherein the view-unable state is realized by encrypting the data of the reproduced copy-restricted content.

Claim 62 is the recording apparatus according to Claim 57, wherein the time when said recording means starts recording said copy-restricted content is determined by referring to discrimination information related to said copy-restricted content.

Claim 63 is the recording device according to Claim 62, wherein said recording means records said copy-restricted content and other content separately using discrimination information.

A 64th aspect is the recording device according to the 62nd aspect, wherein the discrimination information is copyright information included in the data string of the copy-restricted content.

A 65th aspect is the recording apparatus according to the 57th aspect, wherein the timing at which the recording means starts recording the copy-restricted content is determined based on an input from the outside.

A sixty-sixth aspect is the recording device according to the fifty-seventh aspect, wherein the recording medium has a recording buffer for temporarily recording the copy-restricted content.

Claim 67 is the recording device according to Claim 66, wherein the recording buffer is a ring buffer capable of recording a certain amount of data by repeatedly performing overwrite recording on the same area.

A 68th aspect is a recording and reproducing apparatus, comprising: the recording apparatus according to the 57th aspect; reproducing means for reproducing data recorded on the recording medium, wherein the reproducing means starts recording the The recorded copy-restricted content is played back after a predetermined standby time has elapsed from the time when the copy-restricted content was copied.

A 69th aspect is a recording and reproducing apparatus, comprising: the recording apparatus according to the 67th aspect; reproducing means for reproducing data recorded on the recording medium, wherein the reproducing means starts recording the The recorded copy-restricted content is played back after a predetermined standby time has elapsed from the time when the copy-restricted content was copied.

Claim 70 is the recording and reproducing apparatus according to Claim 69, wherein when the reproducing means performs a reproducing operation in the state of overwriting recording in the ring buffer, the above, playback of the data is performed from the position where the earliest data was recorded.

Claim 71 is the recording and reproducing apparatus according to Claim 70, wherein when the reproducing means performs a reproducing operation in a state where overwrite recording is being performed in the ring buffer, data is read from the ring buffer. Playback of the data is performed from the recording start position above.

A 72nd aspect is the recording/reproducing apparatus according to the 68th or 69th aspect, wherein the recording apparatus stops the copy-restricted content recorded on the recording medium when the reproduction-restricted content recorded on the recording medium is not reproduced within the predetermined standby time. A record action that copies restricted content.

A 73rd aspect is the recording/reproducing apparatus according to the 68th or 69th aspect, further comprising means of notifying the recording apparatus or the reproducing means in advance based on either the predetermined time or the predetermined standby time. The notification method of the action content.

A seventy-fourth aspect is the recording device according to the fifty-seventh aspect, wherein the recording means is capable of measuring time information including the predetermined time.

A seventy-fifth aspect is the recording device according to the fifty-seventh aspect, wherein the copy restriction content includes time information, and the time information includes the predetermined time.

A seventy-sixth aspect is the recording device according to the fifty-seventh aspect, wherein time information including the predetermined time is externally acquired independently of the copy-restricted content.

A seventy-seventh aspect is a recording device, comprising: encryption means for encrypting data transmitted from an interface; control means for controlling to record the encrypted data; controlled by the control means and storing the The recording means for recording the encrypted data on the disc, the encryption means adopts the recording unit information of the number and/or mark inherent in the recording block corresponding to the recording unit, which is the smallest unit of the recording means continuously accessed by the control means , to encrypt the data.

Claim 78 is the recording device according to claim 77, wherein the encryption means encrypts the data using a device-unique key which is a unique numerical value assigned to the recording device itself and/or a symbol.

A 79th aspect is the recording apparatus according to the 77th aspect, wherein encrypting the data using the recording unit information is encrypting the data with a key obtained from the recording unit information.

A 80th aspect is the recording device according to the 77th aspect, wherein at least all parts of the encrypted data and the additional information added to the encrypted data recorded in the recording block are all encrypted. Encrypted and recorded in the recording means.

The 81st aspect is the recording device according to the 79th aspect, wherein at least all parts of the encrypted data and the additional information added to the encrypted data recorded in the recording block are all encrypted. Encrypted and recorded in the recording means.

Claim 82 is the recording device according to any one of Claims 77, 79 to 81, wherein copy permission information is added to the data, and the control means controls the recording means so that the recording means Recording the copy permission information, the encryption means generates first information, the first information includes at least one of the device unique key and the copy permission information, the recording unit information is used, and the encryption means generating a content key which is encrypted information of the first information, the encryption means encrypts the data using the content key, and the control means controls the recording means so that the recording means records the encrypted data.

Claim 83 is the recording device according to Claim 78, wherein a title key that is a numerical value and/or a symbol unique to the data is assigned to the data, and the encryption means uses the device-unique key to The title key is encrypted, and the control means controls the recording means so that the encrypted title key is recorded in the recording means.

A 84th aspect is the recording device according to the 83rd aspect, wherein the encryption means encrypts the data using the title key.

A 85th aspect is the recording device according to the 84th aspect, wherein the encryption means encrypts the title key using the device unique key, and the control means controls the recording means so that the recording means means to record the encrypted title key, the encryption means to generate third information including the title key, and the encryption means to generate a content key that is encrypted information of the third information using recording unit information The recording unit information is a serial number and/or a mark inherent in a recording block on the premise that the recording unit, which is the minimum unit of continuous access by the control means to the recording means, is used by the encryption means to The data is encrypted, and the control means controls the recording means so that the recording means records the encrypted data.

Claim 86 is the recording device according to Claim 84, wherein copy permission information is added to the data, and the encryption means also encrypts the data using the copy permission information.

A 87th aspect is the recording device according to the 86th aspect, wherein the encryption means encrypts the title key using the device unique key, and the control means controls the recording means so that the recording means means to record the encrypted title key, the control means to control the recording means so that the recording means records the copy permission information, and the encryption means to generate second information including the At least one of a title key and the copy permission information, the encryption means generates a content key which is information obtained by encrypting the second information by using recording unit information in which the control means continues The number and/or mark inherent in the recording block on the premise that the minimum unit of the recording means is a recording unit, the encryption means encrypts the data using the content key, and the control means controls the recording means, so that the recording means records the encrypted data.

A 88th aspect is the recording device according to the 77th aspect, wherein the encryption means encrypts the data transmitted from the interface to which the copy permission information is added using the copy permission information, and the control means controls the recording means so that the recording means records the copy permission information before recording the data and/or after recording the data.

A 89th aspect is the recording apparatus according to the 88th aspect, wherein said control means controls said recording means so that at least said recording means records said copy permission information before recording said data.

A 90th aspect is the recording apparatus according to the 88th aspect, wherein the control means controls the recording means so that the recording means records the copy permission information only after recording the data.

A ninety-first aspect is the recording device according to the seventy-eighth aspect, wherein the device unique key cannot be accessed by an external device.

A ninety-second aspect is the recording device according to the eighty-second aspect, wherein the copy permission information is recorded in a system area that cannot be directly accessed by a user of the recording means.

Claim 93 is the recording device according to any one of Claims 86 to 90, wherein the copy permission information is recorded in a system area that cannot be directly accessed by a user of the recording means.

A ninety-fourth aspect is the recording device according to the seventy-seventh aspect, wherein the encryption means encrypts the data transmitted from the interface regardless of the value of the copy permission information of the data.

A ninety-fifth aspect is the recording device according to the seventy-seventh aspect, wherein the encryption means does not encrypt the data when the copy permission information of the data transferred from the interface indicates that the data can be freely copied, and the control means Control is performed so that the recording means records the data without encryption.

Description of drawings

Fig. 1 is a block diagram showing the configuration of a hard disk device in Embodiments 1, 2, 4 to 6 of the present invention.

Fig. 2 is a main functional diagram illustrating the hard disk device in the first embodiment of the present invention.

Fig. 3 is a block diagram showing the structure of the encryption means of the hard disk drive according to the first embodiment of the present invention.

Fig. 4 is a block diagram showing the structure of the decryption means of the hard disk drive according to the first embodiment of the present invention.

Fig. 5(a) is a flow chart showing the recording operation of the hard disk device according to the first embodiment of the present invention.

(b) is a schematic diagram showing the correlation of operations during recording in the hard disk device according to the first embodiment of the present invention.

Fig. 6(a) is a flow chart showing the operation of the hard disk device in the first embodiment of the present invention during playback.

(b) is a schematic diagram showing the operation correlation during playback of the hard disk device in the first embodiment of the present invention.

Fig. 7(a) illustrates the recording format of the hard disk device according to the first embodiment of the present invention.

(b) shows an example of a format different from that of (a) above.

Figure 8 illustrates the value of CCI and its meaning.

Fig. 9 is a diagram illustrating a disk format for recording and reproducing in the hard disk device according to the first embodiment of the present invention.

Fig. 10 is a block diagram showing the structure of a hard disk device according to a third embodiment of the present invention.

Fig. 11 is a block diagram showing the structure of an encryption means of a hard disk drive according to a fourth embodiment of the present invention.

Fig. 12 is a block diagram showing the structure of the decryption means of the hard disk drive according to the fourth embodiment of the present invention.

Fig. 13 is a block diagram showing the configuration of an encryption means of a hard disk drive according to a fifth embodiment of the present invention.

Fig. 14 is a block diagram showing the structure of the decryption means of the hard disk drive according to the fifth embodiment of the present invention.

Fig. 15 is a block diagram showing the configuration of an encryption means of a hard disk drive according to a sixth embodiment of the present invention.

Fig. 16 is a block diagram showing the configuration of decryption means of the hard disk drive according to the sixth embodiment of the present invention.

Fig. 17(a) is a block diagram showing the configuration of the encryption means of the hard disk drive according to the embodiment of the present invention.

(b) is a block diagram showing the configuration of the decryption means of the hard disk drive according to the embodiment of the present invention.

Fig. 18(a) is a block diagram showing the configuration of the encryption means of the hard disk drive according to the embodiment of the present invention.

(b) is a block diagram showing the configuration of the decryption means of the hard disk drive according to the embodiment of the present invention.

Fig. 19(a) is a block diagram showing the structure of the encryption means of the hard disk drive according to the embodiment of the present invention.

(b) is a block diagram showing the configuration of the decryption means of the hard disk drive according to the embodiment of the present invention.

Fig. 20 is a block diagram showing the structure of a hard disk device according to a seventh embodiment of the present invention.

Fig. 21 is a block diagram of AVHDD 1 and archive device 2 according to Embodiment 8 of the present invention.

Fig. 22 is a block diagram of AVHDD 12 and archive device 13 according to Embodiment 8 of the present invention.

Fig. 23 is a block diagram of an archiving device 16 according to Embodiment 8 of the present invention.

Fig. 24 is a block diagram of AVHDD 19 and archive device 2 according to Embodiment 8 of the present invention.

Fig. 25 is a block diagram of AVHDD 22 and archive device 23 according to Embodiment 9 of the present invention.

Fig. 26 is a block diagram of AVHDD 32 and DVD device 33 according to Embodiment 11 of the present invention.

Fig. 27 is a diagram showing the structure of a data flow according to Embodiment 4 of the present invention.

Fig. 28 is a block diagram of AVHDD 81 including copying means 80 according to Embodiment 8 of the present invention.

Fig. 29 is a block diagram of AVHDD 91 including copying means 90 according to Embodiment 9 of the present invention.

Fig. 30 is a block diagram of an encrypted data decryption recording system according to Embodiment 10 of the present invention.

Fig. 31 is a block diagram of a recording apparatus 100 according to Embodiment 10 of the present invention.

Fig. 32 is a block diagram of a decryption recording device 101 according to Embodiment 10 of the present invention.

Fig. 33 is a structural diagram of a recording and reproducing apparatus according to Embodiment 12 of the present invention.

Fig. 34 is a timing chart for explaining the operation of the recording and reproducing apparatus according to the twelfth embodiment of the present invention.

Fig. 35 is a timing chart for explaining the operation of the recording and reproducing apparatus according to the twelfth embodiment of the present invention.

Fig. 36 is a structural diagram of a recording and reproducing apparatus according to Embodiment 13 of the present invention.

Fig. 37 is a timing chart for explaining the operation of the recording and reproducing apparatus according to the thirteenth embodiment of the present invention.

Fig. 38 is a timing chart for explaining the operation of the recording and reproducing apparatus according to the thirteenth embodiment of the present invention.

Fig. 39 is a timing chart for explaining the operation of the recording and reproducing apparatus according to Embodiment 14 of the present invention.

Fig. 40 is a structural diagram of a recording and reproducing apparatus according to Embodiment 15 of the present invention.

Fig. 41 is a structural diagram of a recording and reproducing apparatus according to Embodiment 16 of the present invention.

Fig. 42 is an explanatory view showing the operation of the recording and reproducing apparatus according to the sixteenth embodiment of the present invention.

Fig. 43 is a structural diagram of a conventional recording and reproducing apparatus for dubbing and reproducing.

Symbol Description

1IEEE1394 bus

2 hard drives

3 main systems

4I/F

10 controllers

11 Encryption means

12 means of decryption

13 device unique key

14 means of control

15 means of recording

16I/F

17 encrypted content

18 encrypted areas

19 Encryptor

22 adder

23 title key

24CCI

25 record unit number

26 content

27CCI

28 encrypted title key

29 disk media

31 decryptor

32 decryptor

33 Decryptor

34 adders

35 title key

36CCI

37 decrypted content

39 recording units

41 format

47 hard disk device

51 controller

1001, 1012, 1019, 1022, 1032AVHDD

1002, 1013, 1016, 1023 archive equipment

1003STB

1004, 1028 encryption means

1005 1st means of recording

1006, 1025, 1034 storage means

1007, 1027 mobile means

1008, 1031, 1038 replay means

1009 Second Recording Means

1010, 1021 Second recording medium

1011, 1035 sending means

1014 buffer

1015 high-speed transmission means

1017 Interpretation of playback means

1018 IC card

1020 means of judgment

1024 3rd recording means

1026 means of unencrypted data

1029 4th Recording Means

1030 3rd recording medium

1033 DVD device

1036 5th record means

1037DVD

2010 Discrimination information detection means

2011 Time Information Acquisition Means

2012 record playback means

2013 Recording Media

2014 Record Buffer

2015 Control Input I/F

2016 Switching Means

Detailed ways

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(first embodiment)

First, the first embodiment will be described.

FIG. 1 shows the configuration of a hard disk device 2 as an embodiment of a recording device and a reproducing device according to the present invention.

The hard disk device 2 is connected to the IEEE1394 bus 1 , and the IEEE1394 bus 1 is connected to the host system 3 .

The IEEE1394 bus is a high performance serial bus (high performance serial bus) of the IEEE standard described in IEEE1394-1995 that relays the transmission of AV data or the exchange of commands.

The main system 3 has an I/F 16 as an IEEE1394 interface, and it transmits the copyright-protected data to be recorded in the hard disk device 2 to the IEEE1394 bus 1, or receives and reproduces the copyright-protected data from the hard disk device 2 through the IEEE1394 bus 1. For example, it can be STB (set upbox, set-top box) and so on.

The hard disk device 2 is capable of exchanging AV data with the host system 3 via the IEEE1394 bus 1 and simultaneously protecting copyrights and recording or reproducing AV data on or from a magnetic disk medium.

That is, the hard disk device 2 is a device that, as shown in FIG. 2, records or reproduces the encrypted content 17 after encryption, such as the encrypted content 17 of AV data that requires copyright protection.

The hard disk device 2 is composed of an I/F 4 , a controller 10 , and a recording means 15 .

Also, the controller 10 is composed of encryption means 11 , decryption means 12 , device unique key 13 , and control means 14 .

I/F4 is an interface of the IEEE1394-DTCP (Digital Transmission Content Protection) method, and it is an interface capable of performing the following operations, that is, exchanging commands and AV data with external devices such as the main system 3 through the IEEE1394 bus 1 , and encrypt the AV data, perform authentication with other devices, and invalidate the key for decrypting the password according to whether the authentication is successful, thereby protecting the copyright of the AV data transmitted through the IEEE1394 bus 1.

The encryption means 11 constituting the controller 10 is means for encrypting AV data transmitted from the I/F 4 and data added to the AV data.

The decryption means 12 is means for decrypting the AV data read by the recording means 15 and the data added to the AV data.

The structures of the encryption means 11 and the decryption means 12 will be described below.

The device unique key 13 is a serial number and/or a mark uniquely assigned to each hard disk device, and is recorded in an area that cannot be accessed by the hard disk device 2 and/or from the outside of the controller 10 .

The recording means 15 consists of a magnetic disk medium for recording data, a magnetic head for recording and reproducing information on the magnetic disk medium, a drive arm for positioning the magnetic head at an arbitrary radial position on the magnetic disk medium, and a spindle motor for rotating the magnetic disk medium. The recording means 15 is a means for recording data on or reading data from a magnetic disk medium. In the recording means 15 , a magnetic disk medium for reading data is mounted in the hard disk device 2 , and cannot be detached from the hard disk device 2 .

The control means 14 is a means for controlling, and it designates the LBA and makes the LBA correspond to the magnetic head and the sector of the magnetic disk medium of the recording means 15, controls the driving arm and the spindle motor, and positions the magnetic head and writes or writes to the magnetic disk medium from the magnetic head. Read out the data.

In addition, as described above, the configuration of the encryption means 11 is shown in FIG. 3 .

The encryption means 11 is composed of an encryptor 19 , an encryptor 20 , an encryptor 21 and an adder 22 .

In addition, in FIG. 3 , the device unique key 13 is assigned to the hard disk device 2 as described above, and is a numerical value and/or a symbol unique to the hard disk device 2 . That is, a different device unique key 13 is assigned to each hard disk device 2 . Also, the device unique key 13 is stored in the secret area 18 provided in the controller 10 of the hard disk device 2 . This secret area 18 is a protected area that can neither be written nor read by an external device, and it is an area where only the controller 10 can read out information stored in the secret area 18 . Specifically, the secret area 18 is realized by using a ROM on a printed circuit board. That is, the device unique key 13 is recorded in the ROM on the printed substrate. That is, the ROM cannot be accessed from outside the hard disk device 2 and/or the controller 10 .

The title key 23 is a numerical value and/or a symbol uniquely assigned to each AV data.

CCI (Copy control information, copy control information) 24 is appended in the AV data, and it is the numerical value of the 2 bits that represent copy permission information, and CCI24 is appended to the sy area of the synchronous header of the synchronous data packet and sends.

Figure 8 shows the binary values obtained by the CCI and their meanings. When the CCI is 11, it means that copying is not permitted. That is, although the AV data to which the CCI of this value is added can be viewed, it is prohibited to create a copy in which the AV data is recorded on the hard disk device 2 or the like.

When the CCI is 10, it means that it can be copied once. That is, it is possible to view AV data with CCI of this value added, and also to generate a copy of first-generation AV data that is recorded on the hard disk device 2 or the like.

When the CCI is 01, it means that no more copying is possible. That is, the AV data after copying the AV data whose CCI is copied only once cannot be copied again. This means that further copying is prohibited. That is, after recording a content that can be copied once, it must be impossible to copy again so that no copying is performed during playback.

When the CCI is 00, it indicates that copying is permitted. That is, AV data to which this CCI value is added can be freely viewed and also freely copied.

The recording unit number 25 is a serial number and/or a mark inherent in a recording block having a recording unit size, which is the minimum unit for the control means 14 to access the recording means 15 continuously. That is, different recording unit numbers 25 are assigned to the above-mentioned different recording blocks. In this way, the recording unit number 25 is secret information that cannot be seen by the user or external equipment. The recording unit number 25 and the recording unit will be described later.

Also, the recording unit number 25 in this embodiment is an example of recording unit information in the present invention.

The content 26 is AV data constituting programs such as movies, music, and dramas.

In addition, the magnetic disk medium 29 is a magnetic disk in which data can be read and written by the recording means 15 .

The encryptor 19 is means for reading the device unique key 13 stored in the secret area 18, encrypting the title key 23, and outputting the encrypted title key 28.

The adder 22 is a means for generating key generation information that is appended to the lower order CCI 24 of the title key 23 .

Also, the information for key generation in this embodiment is an example of the second information of the present invention.

The encryptor 20 is means for encrypting key generation information using the recording unit number 25 to generate a content key.

The encryptor 21 is means for encrypting the content 26 using a content key.

In addition, FIG. 4 shows the configuration of the decryption means 12 .

The decryption means 12 is composed of a decryptor 31 , a decryptor 32 , a decryptor 33 , and an adder 34 .

Also, in Fig. 4, the device unique key 13, the title key 35, the CCI 36, the record unit number 25, and the decrypted content 37 are shown, and they correspond to the device unique key 13 shown in Fig. 3 , the title key respectively. Key 23, CCI 24, recording unit number 25, content 26.

In addition, the magnetic disk medium 29 is a magnetic disk for reading and writing data by the recording means 15, and is the same as the magnetic disk medium shown in FIG. 3 .

The decryptor 31 reads the device unique key 13 stored in the secret area 18 , decrypts the encrypted title key 28 using the device unique key 13 , and outputs the title key 35 .

The adder 34 is a means for generating key generation information that is appended to the lower order CCI 27 of the title key 35 .

The decryptor 32 is means for decrypting the key generation information using the recording unit number 25 and generating a content key.

The decryptor 33 is means for decrypting the encrypted content 17 using the content key and outputting the decrypted content 37 .

The recording format of the magnetic disk medium 29 of the recording means 15 is shown in FIG. 7(a). The area of the magnetic disk medium 29 is divided into recording units 39 which are a plurality of recording blocks having a recording unit size. The control means 14 cannot access an area smaller than the recording unit 39, and must start accessing from the head of the recording block of the recording unit 39 or the like. That is, the control means 14 must read or write data for each recording block of the recording unit 39 .

Also, in this embodiment, AV data is recorded by dividing one recording unit 39 into a header 38 and a data area 40 .

Data 40 is an area for recording transmission packets. Also, the encrypted title key 35 is recorded in the header 38 . The information recorded in the header 38 area of the recording unit 39 and the information recorded in the data 40 area are both encrypted.

That is, FIG. 7(b) shows another example of recording AV data in a recording block of a recording medium. The point that the recording block 150 is divided into header 151 and data 152 and recorded is the same as the recording format of the present embodiment. However, in FIG. 7( b ), the portion of the header 151 is the non-encrypted 154 portion, and the portion of the data 155 is the encrypted 155 portion. That is, only the data 152 portion is encrypted. Therefore, when transmitting on the IEEE1394 bus 1 or the like, the encryption key 153 to be transmitted is recorded in the header 151 without being encrypted. Therefore, when an external device illegally accesses the portion of the header 151, since the external device can obtain the key 153, the encryption of the AV data will be deciphered and the copyright cannot be protected.

On the contrary, the recording format of the present embodiment is as shown in Figure 7 (a), because all the data recorded in the recording unit 39 is encrypted, compared with the recording format shown in Figure 7 (b), it can be more encrypted. Reliably protect copyright.

Thus, the recording format of this embodiment is unique to the manufacturer of the hard disk drive. Therefore, it is difficult for an external device using a standard format to read such data recorded in a format inherent to the manufacturer. Therefore, by adopting the recording format of this embodiment, the copyright of the AV data recorded on the magnetic disk medium 29 can be protected. Furthermore, the sector size and the recording unit size of the recording format of this embodiment can be freely designed.

As a specific example of the recording unit, there is, for example, a sector of the magnetic disk medium 29 . That is, a predetermined number of consecutive sectors such as one sector, 62 consecutive sectors, 128 consecutive sectors, . . . 2048 consecutive sectors can be used as the recording unit 39 .

Also, as a specific example of the recording unit number 25 described above, for example, a sector LBA (logical block address, logical block address) can be used as the recording unit number 25 . That is, it is possible to record the LBA of the first sector of the unit 39, the LBA of the second sector from the first sector of the recording unit 39, and the Nth from the first sector of the recording unit 39 (N is less than the number of the sectors forming the recording unit). An integer of the total number of sectors) is used as the recording unit number 25.

Alternatively, a number for uniquely identifying the recording unit 39 can also be used. That is, the number when the recording units 39 are numbered sequentially from the inner circumference to the outer circumference of the magnetic disk medium 29 can be used as the recording unit number 25 .

Alternatively, an address for internal management used to manage the recording unit can also be used.

Alternatively, it is also possible to use a numerical value or a symbol that is output by combining a plurality of examples as described above according to a certain rule.

In short, the recording unit number 25 is information that cannot be seen by the user, and it is sufficient as long as it uniquely identifies all the recording units 39 of the magnetic disk medium 29 without duplication.

Again, the hard disk device 2 of the present embodiment is an example of the recording device of the present invention, the hard disk device 2 of the present embodiment is also an example of the playback device of the present invention, and the recording means of the present embodiment is also used as the playback means of the present invention. example.

In addition, I/F4 of this embodiment is an example of the interface of this invention, and the magnetic disk medium 29 of this embodiment is an example of the disk of this invention.

Furthermore, the controller 13 including the encryption means 11, the decryption means 12, and the device unique key 13 and the I/F 4 are integrally provided on one printed substrate. In addition, the encryption means 11, the decryption means 12, the control means 14, and the I/F4 are each implemented as a single-chip LSI (Large Scale Integration). The signals on these chip terminals are encrypted by interleaving bits in an undisclosed format. Therefore, even if an external device extracts a reproducible signal as AV data from these terminals, it is difficult to reproduce the AV data because the format of the generated signal cannot be deciphered.

Next, the operation of this embodiment will be described.

First, the operation when the hard disk device 2 records AV data requiring copyright protection will be described.

Also, in this embodiment, AV data is transmitted in the form of an MPEG2 transport stream.

In FIG. 5( a ), main operations of the main system 3 and the hard disk device 2 are shown in a flowchart. Hereinafter, it demonstrates based on this flowchart. In addition, in FIG. 5( b ), the correlation between the operations of the main system 3 and the hard disk device 2 is shown using a schematic diagram.

The host system 3 encrypts the AV data which must be copyrighted and transmits it to the IEEE1394 bus 1 as an isochronous packet.

The I/F 16 encrypts AV data in the form of an MPEG2 transport stream. Furthermore, a source packet header is added to a transport packet of the encrypted MPEG2 transport stream to generate a source packet. Then, a CIP header is added to the data block obtained by dividing or combining the source packet to generate a CIP. Furthermore, an isochronous header is added to the CIP, and an isochronous packet is generated and transmitted to the IEEE1394 bus 1 .

Also, when generating an isochronous packet, CCI 24 in FIG. 3 is added to the sy field of the isochronous packet.

The host system 3 issues a command to the hard disk device 2 to start recording AV data.

This command is transmitted from I/F16 to I/F4 via IEEE1394 bus 1 as an asynchronous packet.

When the I/F4 receives a command instructing recording start, it requests authentication to the I/F16.

After receiving this request, I/F 16 and I/F 4 perform an authentication operation (S1). This authentication operation is represented by authentication 85 in FIG. 5( b ).

In order to record AV data in the hard disk device 2, it is determined by the I/F 16 whether it is an authorized device or an unauthorized device. If it is an authentic device, the authentication succeeds, and if it is an unauthorized device, the authentication fails (S2).

If the hard disk device 2 is not qualified to record AV data, authentication fails (S3). At this time, the hard disk device 2 cannot record AV data.

If the hard disk device 2 is an authentic device capable of recording AV data, the authentication is successful.

When the authentication is successful, the I/F 4 identifies the synchronization channel and receives the synchronization data packet transmitted by the main system 3 .

Then, I/F4 separates the CCI from the sync header of the received sync packet.

Next, the following operations are performed according to the value of the CCI.

That is, in FIG. 8, when the binary value CCI is 11, that is, when copying is prohibited, since recording of AV data is not allowed, the I/F 4 informs the host system 3 that the recording process is not performed, and does not indicate to the controller 10 that Start recording processing.

When the binary value CCI is 10, that is, in the case where one copy is permitted, the I/F 4 notifies the host system 3 to start the recording process and also instructs the controller 10 to start the recording process.

When the binary value CCI is 01, that is, when copying is no longer permitted, the I/F4 performs the same operation as when copying is prohibited.

When the binary value CCI is 00, that is, in the case where copying is permitted, the host system 3 is notified to start the recording process and also instructs the controller 10 to start the recording process.

Therefore, when the binary value CCI is 10, the I/F 4 decrypts the encrypted AV data using the key obtained from the host system 3 during the authentication operation. Then, the decrypted AV data is output for each transport packet at the time indicated by the transfer time stamp attached to the header of the source packet for each transport packet. When the CCI is 00, since AV data is transmitted without encryption, decryption processing is not performed, and output is performed for each transport packet at the time indicated by the time stamp for transmission.

In this way, the AV data output from I/F4 is decrypted and becomes unencrypted data. However, since the output is a signal written in the format unique to the hard disk device 2, even if a third party obtains it from the chip terminal of I/F4 It is also difficult for a third party to restore the signal to usable AV data.

The encryption means 11 inputs the MPEG2 transport packet sent from the I/F4.

First, the encryptor 19 reads the device unique key 13 stored in the secret area 18 (S4).

The encryption means 11 detects the title key 23 attached to the AV data transmitted from the I/F 4 . Then, the encryptor 19 encrypts the detected title key 23 with the device unique key 13 (S5).

Then, under the control of the control means 14 , the title key 23 encrypted by the encryptor 19 is recorded on the disk medium 29 of the recording means 5 like the encrypted title key 28 . This encrypted title key 28 is also shown in FIG. 5(b).

Furthermore, the encryption means 11 detects the CCI 24 attached to the AV data and transmitted. Under the control of the control means 14 , the detected CCI 24 is recorded on the disk medium 29 of the recording means 15 as CCI 27 .

The adder 22 generates information for key generation that is information in which the CCI 24 is added to the lower order of the title key 23 .

On the other hand, information on which recording unit to record the AV data is also transmitted from the control means 14 as additional information of the AV data. The encryption means 11 obtains the recording unit number 25 of the recording unit to be recorded.

The encryptor 20 encrypts the key generation information generated by the adder using the recording unit number 25 of the recording unit in which the AV data is to be recorded. This encrypted information is called a content key. Since the content key is encrypted with the recording unit number 25, it is different for each recording unit.

Next, the encryptor 21 encrypts the content 26 which is the AV data to be recorded from then on with the content key (S7).

Under the control of the control means 14, the encrypted AV data is recorded as the encrypted content 17 in the recording unit to be recorded on the disk medium 29 of the recording means 15 (S8). The encrypted content 17 is also shown in FIG. 5( b ).

Hereinafter, the above-mentioned operation is repeated in the same way, that is, for each recording unit, the key generation information is encrypted with the recording unit number 25 to generate a content key, and the content 26 is encrypted with the generated content key (S7), and the encrypted content key is encrypted (S7). The subsequent content 17 is recorded on the disk medium 29 (S8).

In this manner, the hard disk medium 29 can record AV data on the magnetic disk medium 29 that requires copyright protection.

Next, the operation when the hard disk device 2 reproduces AV data requiring copyright protection will be described.

FIG. 6(a) shows a flowchart of the main operations of the main system 3 and the hard disk device 2 during playback. Hereinafter, it demonstrates based on this flowchart. In addition, FIG. 6(b) shows a schematic diagram illustrating the correlation of main operations of the main system 3 and the hard disk device 2 during playback.

The host system 3 issues a command instructing the hard disk device 2 to start playback.

This command is transmitted from I/F 16 to I/F 4 via IEEE1394 bus 1 as an asynchronous packet.

Furthermore, I/F16 makes an authentication request to I/F4.

After receiving this request, I/F 16 and I/F 4 perform an authentication operation (S9). This authentication operation is shown as authentication 86 in (b) of FIG. 6 .

In order for the main system 3 to use the AV data, the I/F 4 judges whether it is a legitimate device or an unauthorized device. If it is an authentic device, the authentication succeeds, and if it is an unauthorized device, the authentication fails (S10).

When the host system 3 is not qualified to utilize AV data, authentication fails (S11). At this time, the host system 3 cannot record AV data.

If the host system 3 is an authentic device capable of recording AV data, the authentication is successful.

When the authentication is successful, the I/F 4 notifies the controller 10 that a command to play back AV data has been transmitted.

When the decryption means 12 receives this notification, first, the decryptor 31 reads the device unique key 13 stored in the secret area 18 (S12).

Then, under the control of the control means 14, the recording means 15 reads the encrypted title key 28 from the magnetic disk medium 29 (S13). Figure 6(b) shows the encrypted title key 28.

The decryptor 31 decrypts the encrypted title key 28 based on the device unique key 13 (S14). Then, the decryption means 12 transmits the decrypted title key 35 to the I/F 4 .

Under the control of the control means 14 , the recording means 15 reads the CCI 27 from the magnetic disk medium 29 .

The decryption means 12 sends the CCI27 to the I/F4.

The adder 34 generates key generation information in which the read CCI 27 is added to the lower bits of the decrypted title key 35 .

The control means 14 specifies the recording unit 39 to be read, and performs control so that the recording means 15 reads the encrypted content 17 which is information stored in the recording unit 39 .

The decryption means 12 obtains the recording unit number 25 of the recording unit 39 .

The decryptor 32 decrypts the key generation information generated by the adder using the recording unit number 25 of the recording unit 39 from which data is to be read. This decrypted information is called a content key. Since the content encryption is decrypted with the recording unit number 25, it is different for each recording unit.

Next, under the control of the control means 14, the recording means 15 reads the encrypted content 17 which is the information recorded in the recording unit to be read from the magnetic disk medium 29 (S15). Fig. 6(b) also shows the encrypted content 17.

Next, the decrypter 33 decrypts the encrypted content 17 read by the recording means 15 using the content key (S16).

The decryption means 12 sends the decrypted content to the I/F4.

Hereinafter, the above-mentioned operation is repeated in the same way, that is, for each recording unit, the key generation information is decrypted with the recording unit number 25, the content key is generated, the encrypted content 17 is read (S15), and the encrypted content 17 is read by the content key. The content 17 is decrypted (S16), and the decrypted content 27 is sent to the I/F4 as an MPEG2 transport stream.

Also, although the AV data output from the decryption means 12 is decrypted, it is difficult for the third party to take out the signal even if the third party takes out the signal from the chip terminal of the decryption means 12 due to the information written in the format unique to the hard disk device 2. It is restored to usable AV data.

The I/F 4 encrypts the AV data transmitted from the controller 10 . Then, it is transmitted to IEEE1394 bus 1 as an isochronous packet.

The I/F 16 of the main system 3 recognizes the isochronous channel and receives the isochronous packet, and decrypts the encrypted AV data.

The I/F 16 outputs the received AV data as an MPEG2 transport stream.

The output AV data is separated by an unillustrated transport stream decoder included in the main system 3 . Then, an AV decoder (not shown) decrypts the AV and converts it into an analog signal to display on the display.

In this way, the hard disk medium 29 reproduces AV data whose copyright must be protected from the magnetic disk medium 29 .

The hard disk device 2 of this embodiment can protect the copyright of the AV data that requires copyright protection when the AV data is recorded, when the AV data is reproduced, and when the AV data is recorded to the recording means 15 .

In addition, in this embodiment, the case where the magnetic disk 29 cannot be detached from the hard disk device 2 has been described as an example, but it is not limited to this, and a detachable configuration may be used.

Furthermore, in this embodiment, the device unique key 13 is stored in the ROM as the secret area 18 on the printed circuit board of the hard disk device 2 as an example, but it is not limited thereto. The secret area 18 may also be provided in the disk medium 29 . That is, the device unique key 13 may be stored in an area of the magnetic disk 29 that cannot be accessed by the user.

In addition, in this embodiment, the case where the encrypted title key 28 is recorded in the user area which the user can access to the magnetic disk 29 was demonstrated, but it is not limited to this. It is also possible to record to a system area that cannot be accessed by the user of the disk medium 29 . In addition, it is also possible to record in a RAM provided on a printed circuit board of the hard disk device 2 .

In addition, in this embodiment, the case where the recording device and the reproducing device of the present invention are integrated as the hard disk device 2 has been described, but it is not limited thereto. Recording device of the present invention can be made of I/F4, encryption means 11, control means 14, recording means 15, and it is the device of recording AV data, again, playback device of the present invention can be made of I/F4, decryption means 12, The recording means 15 is configured. In short, the recording device of the present invention only needs to include encryption means, control means, and recording means. Also, it is only necessary that the playback device of the present invention includes decryption means and control means.

In addition, although the I/F4 of the hard disk drive 2 of this embodiment, the encryption means 11, the decryption means 12, and the control means 14 are demonstrated as a case where each consists of a single-chip LSI, it is not limited to this. The I/F4, encryption means, decryption means 12, and control means 14 may each be composed of a plurality of chip LSIs. In addition, the description has been given for the case where AV data is written in a private format on the terminals of the chip, but the invention is not limited to this, and encryption may be performed for transmission between terminals. Also, the nature of the chip terminals may be determined in an undisclosed format. Here, the properties of the chip terminals indicate properties such as which terminal outputs which signal, which terminal is combined with which terminal to output which signal, or which application each terminal is used for. Since the nature of such chip terminals is determined by the non-disclosure format, for example, the user cannot know for what purpose each terminal is used and the like. In short, among the terminals on the printed circuit board provided with I/F 4 and the controller 10, and the chip terminals, the signals detected by the terminals that output a third party as a signal that can be reproduced as AV data, as long as they are all encrypted or/and It is only necessary to describe or determine the properties of these terminals in a non-public format.

Furthermore, the I/F 4, the encryption means 11, the decryption means 12, and the control means 14 of the hard disk device 2 of the present embodiment may be constituted by a single-chip LSI. If so, the copyright of the AV data can be guaranteed more reliably.

In addition, in this embodiment, the case of encrypting AV data using CCI has been described as an example, but it is not limited thereto. It is also possible to encrypt AV data without CCI. That is, instead of the adder 22 generating the key generation information based on the CCI and the title key 23, the adder 22 may not be used, and the title key 23 may be directly used as the key generation information, and the key may be generated from the recording unit number. Encrypt the information to generate a content key. Also, the title key 23 at this time is an example of the third information of the present invention. In this manner, when encrypting AV data without using CCI, CCI may be recorded on the magnetic disk medium 29 as in the present embodiment, or CCI may not be recorded on the magnetic disk medium 29 .

Furthermore, in this embodiment, the following case has been described, that is, the hard disk device 2 does not record the AV data when the value of the CCI attached to the AV data is copy prohibition, and when the value of the CCI is In the case of copying once, the AV data is encrypted and recorded. When the value of CCI is not allowed, the AV data is not recorded. When the value of CCI is allowed, the AV data is encrypted. Afterwards it is recorded, but not limited to. Even when the value of the CCI attached to the AV data is obtained to be an arbitrary value, the AV data can be encrypted and recorded. Alternatively, when the value of the CCI added to the AV data permits copying, the AV data may not be encrypted and unencrypted data may be recorded as it is.

In addition, in this embodiment, the case where the information for key generation is the information of adding the read CCI to the lower bits of the decrypted title key is described, but it is not limited to this. The information may be information in which the read CCI is added before the high-order bits of the title key. Note that the key generation information may include only the title key and CCI information, or may include the title key and CCI and other information. In addition, it may be information including either the title key or the CCI. In short, the key generation information in this embodiment may be information as long as it includes at least one of the title key and CCI.

(second embodiment)

Next, a second embodiment will be described.

In this embodiment, the description will focus on the processing of CCI.

FIG. 1 shows the structure of a hard disk device 2 as an embodiment of the recording device and the reproducing device of the present invention.

The structure of the hard disk drive 2 of this embodiment is the same as that of the first embodiment.

FIG. 9 shows the format 41 of the magnetic disk medium 29 of the recording means 15. As shown in FIG. The left side of the paper is the disk inner periphery 45 of the disk medium 29 , and the right side of the paper is corresponding to the disk outer periphery 46 . The area on the inner periphery 45 of the disk is the system FAT 42 , and the area on the outer periphery 46 of the disk is the data 43 .

The system FAT 42 is a system area that cannot be accessed by users, and is an area used by the control means 14 to control the system, such as file management information.

On the other hand, the data 43 is an area accessible by the user, and AV data is recorded. That is, as shown in FIGS. 3 and 4, the encrypted content 17, the encrypted title key 28, and the like are recorded.

Then, CCI is recorded in each recording unit of the constituent data 43 in the system FAT 42 as indicated by the CCI data 44 . That is, the value of CCI is assigned to each recording unit.

Also, the file management information is composed of, for example, FAT (File allocation Table, file allocation table) and information called a directory.

The FAT is a table that shows the address of a recording unit and the address of the next recording unit in pairs, and indicates in which order data of a file is stored in which recording unit.

In addition, the directory is a table for hierarchically managing files, which is a table representing the file name and the address of the recording unit of the head of the data stored in the file in pairs, and information indicating that the file is read-only or rewritable. .

If FAT and directories are used, it is possible to manage processes such as creation, editing, and deletion of files.

Next, the operation of this embodiment will be described.

As in the first embodiment, the hard disk device 2 records AV data. In this case, AV data is recorded one by one in each recording unit as in the first embodiment. Whenever recording of AV data to a new recording unit is completed, the control means 14 generates and updates file management information indicating in which recording unit AV data is to be recorded. Then, the file management information is stored in its own memory.

Next, when recording of all AV data is completed, the control means writes the generated and updated file management information into the system FAT 42, and updates the system FAT 42 to the latest information.

Finally, the control means 14 writes the value of the CCI of the recording unit in which the AV data is newly written into the file management information.

Thus, when recording AV data, first, the AV data is recorded on the disk medium 29, after the recording of the AV data is completed, the management information is recorded on the disk medium 29, and finally the CCI is written into the system FAT42.

However, it is assumed that during recording of AV data, the user unplugs the power plug of the hard disk device 2 by mistake, thereby cutting off the power of the hard disk device 2 . At this time, the file management information and CCI of the recorded portion of the AV data that is already being recorded disappear.

The hard disk device 2 of the present embodiment plays back the AV data recorded so interrupted as follows.

The control means 14 determines the order of writing the empty recording units in the magnetic disk medium 29 according to certain rules.

The AV data whose recording was interrupted is recorded according to this rule, and the control means 14 reproduces it according to the file management information before updating. Then, the encryption means 11 tries to decrypt based on the combination of the 2-bit values of the CCI.

Then, the AV data is decrypted from the beginning using the value of the CCI whose decryption was successful.

In this manner, the hard disk device 2 of the present embodiment can normally decrypt AV data whose recording has been interrupted.

Furthermore, the end of the AV data is detected based on the consistency of PCR values added to the transport packets.

That is, the PCR is added to the transmission data packet at an interval of up to 100 ms, and the value of the PCR is counted at a frequency of 27 MHz as a count value of 33 high-order bits and 9 low-order bits. Therefore, it can be seen that when the value of the PCR reaches a value equal to or greater than 100 ms, other AV data will be reproduced beyond the end of the AV data. Therefore, the encryption means 11 transmits to the I/F 4 only AV data in a range in which PCR values are continuous.

In addition, in the hard disk device 2 of the present embodiment, the case where encryption and decryption are performed in the same manner as in the first embodiment has been described, but the present invention is not limited thereto. Encryption different from that of the first embodiment may also be performed. In short, as long as it is a hard disk device encrypted by using CCI.

In addition, in the hard disk device 2 of this embodiment, the case where the value of CCI was assumed and decoding was tried was demonstrated, but it is not limited to this. The CCI may be recorded on the disk 29 before recording the AV data, and the CCI is always recorded in the recording means 15 even if the recording of the AV data is interrupted.

In addition, in this embodiment, the case where the recording device and the reproducing device of the present invention are integrated as the hard disk device 2 has been described, but the present invention is not limited thereto. Recording device of the present invention can be made of I/F4, encryption means 11, control means 14, recording means 15, and it is the device of recording AV data, again, playback device of the present invention can be made of I/F4, decryption means 12, The control means 14 and the recording means 15 are constituted. In short, the recording device of the present invention only needs to include encryption means, control means, and recording means. In addition, the playback device of the present invention only needs to include decryption means and control means.

Furthermore, in the embodiment of the present invention, the case where the file management information is formed of FAT and directory has been described, but it is not limited thereto. You can also use HPFS (high performance file system, high-performance file system) in OS/2, the file system of Mac OS, i-node in UNIX, VFAT (virtual FAT, virtual FAT) in Windows95, NTFS (new FAT) in Windows NT technology file system, technology file system) and other file management information. However, at this time, it is necessary to make the recording unit described in the first embodiment coincide with these recording blocks of the file management information. In short, file management information in an OS capable of recording and reproducing a hard disk may also be used.

(third embodiment)

Next, a third embodiment will be described.

FIG. 10 shows the structure of a hard disk device 47 which is an embodiment of the recording device and the reproducing device of the present invention.

The hard disk drive 47 of the present embodiment includes an I/F 48 instead of the I/F 4 of the first embodiment. In addition, the controller 51 of this embodiment does not have the encryption means 11, the decryption means 12, and the device unique key 13.

The interface of the I/F 48 transfers the encrypted AV data transferred from the IEEE1394 bus 1 to the controller 51 without decrypting it, and transfers the encrypted AV data transferred from the controller 51 to the IEEE1394 bus 1 as it is. Other than that, it is the same as I/F4 of the first embodiment.

Next, the operation of the hard disk device 47 of the present embodiment will be described focusing on differences from the first embodiment.

First, the operation when recording AV data will be described.

Similar to the first embodiment, I/F16 and I/F48 perform authentication operation, and it is assumed that the authentication is successful. Thus, the I/F 48 recognizes the isochronous channel and receives the isochronous packet transmitted from the host system 3 .

Then, the MPEG2 transport stream is recovered from the isochronous packets. Next, the transmission packets are sequentially transmitted to the controller 15 .

The control means 14 controls so that the recording means records encrypted AV data on the magnetic disk 29 .

Other than that, it is the same as the first embodiment.

Thus, the hard disk drive 47 of this embodiment records encrypted AV data as it is.

Next, the operation when reproducing encrypted AV data will be described.

Similar to the first embodiment, I/F16 and I/F48 perform authentication operation, and it is assumed that the authentication is successful. In this way, the control means 14 controls so that the recording means 15 reads the encrypted AV data, and the controller 51 sends the read AV data to the I/F 48 as an MPEG2 transport stream.

The I/F48 transmits the encrypted MPEG2 transport stream to the IEEE1394 bus 1 as an isochronous packet.

Other than that, it is the same as the first embodiment.

Thus, the hard disk drive 47 of this embodiment records and reproduces the AV data encrypted for transmission as it is, and the copyright of the AV data can be protected by such a simple structure.

(fourth embodiment)

Next, a fourth embodiment will be described.

FIG. 1 shows a hard disk device 2 as an embodiment of a recording device and a reproducing device according to the present invention. In the hard disk device 2 of the present embodiment, the encryption means 11 and the decryption means 12 of the hard disk device 2 described in the first embodiment are replaced with other encryption means and decryption means.

FIG. 11 shows the encryption means 60 of the hard disk device 2 of this embodiment. 12 shows the decryption means 61 of this embodiment.

In this embodiment, the encryption means 60 and the decryption means 61 which are different points from the first embodiment will be mainly described.

In FIG. 11 , the encryption means 60 is formed by the encryptor 19 , the encryptor 52 , and the encryptor 21 . That is, unlike the encryption means 11 of the first embodiment, the encryption means 60 does not perform encryption using CCI.

That is, the encryptor 19 is means for reading the device unique key 13 stored in the secret area 18 and encrypting the title key 23 to output the encrypted title key 28 .

Also, the title key 23 of this embodiment is an example of the first information of the present invention.

The encryptor 52 is a means for encrypting the title key 23 using the recording unit number 25, that is, generating a content key.

The encryptor 21 is a means for encrypting the content 26 using a content key.

Fig. 12 shows the decryption means 61 of the hard disk device 2 of this embodiment.

In FIG. 12 , decryption means 61 is composed of decryptor 31 , decryptor 53 , and decryptor 33 . Unlike the first embodiment, the decryption means 61 does not use CCI for decryption.

That is, the decryptor 31 is means for reading the device unique key 13 stored in the secret area 18 and decrypting the encrypted title key 28 using the device unique key 13 to output the title key 35 .

Also, the title key 28 of this embodiment is an example of the second information of the present invention.

The decryptor 53 is means for decrypting the title key 35 using the recording unit number 25 to generate a content key.

The decryptor 33 is means for decrypting the encrypted content 17 using the content key and outputting the decrypted content 37 .

Next, the operation of the present embodiment will be described centering on the operations of the encryption means 60 and the decryption means 61 which are points different from those of the first embodiment.

First, the operation of the encryption means 60 will be described.

The encryptor 19 reads the device unique key 13 stored in the secret area 18 .

The encryption means 60 detects the title key 23 attached to the AV data transmitted from the I/F 4 . Then, the encryptor 19 encrypts the detected title key 23 with the device unique key 13 .

Then, the title key 23 encrypted by the encryptor 19 is recorded on the disk medium 29 of the recording means 15 as the encrypted title key 28 under the control of the control means 14 .

In addition, the encryption means 60 detects the CCI 24 added and transmitted to the AV data. Under the control of the control means 14 , the detected CCI 24 is recorded on the disk medium 29 of the recording means 15 as CCI 27 .

The encryption means 60 obtains the recording unit number 25 of the recording unit to be recorded.

The encryptor 52 encrypts the title key 23 using the recording unit number 25 of the recording unit to be AV data recorded. This encrypted information is called a content key. Since the content key is encrypted with the recording unit number 25, it is different for each recording unit.

Next, the encryptor 21 encrypts the content 26, which is the AV data to be recorded, with the content key.

Under the control of the control means 14, the encrypted AV data is recorded as the encrypted content 17 in the recording unit of the disk medium 29 of the recording means 15 to be recorded.

Hereinafter, the above operation is repeated in the same way, that is, for each recording unit, the title key 23 is encrypted with the recording unit number 25 and the content key is output, the content 26 is encrypted with the generated content key, and the encrypted content 17 is encrypted. Record to disk media 29 .

In this way, the hard disk medium 29 records AV data requiring copyright protection on the magnetic disk medium 29 .

Next, the operation of the decryption means 61 will be described.

The decryptor 31 reads the device unique key 13 stored in the secret area 18 .

Furthermore, under the control of the control means 14 , the recording means 15 reads the encrypted title key 28 from the magnetic disk medium 29 .

The decryptor 31 decrypts the encrypted title key 28 according to the device unique key 13 . Then, the decryption means 61 transmits the decrypted title key 35 to the I/F4.

Under the control of the control means 14 , the recording means 15 reads the CCI 27 from the magnetic disk medium 29 .

The decryption means 12 sends the CCI 27 to the I/F4.

The control means 14 specifies the recording unit 39 to be read and controls such that the recording means 15 reads the encrypted content 17 which is information stored in the recording unit 39 .

The decryption means 61 obtains the recording unit number 25 of the recording unit 39 .

The decryptor 53 decrypts the title key 35 using the recording unit number 25 of the recording unit 39 whose data is to be read. This decrypted information is called a content key. Since the content key is decrypted by the recording unit number 25, it is different for each recording unit.

Then, under the control of the control means 14, the recording means 15 reads the encrypted content 17 which is the information stored in the recording unit to be read out of the magnetic disk medium 29.

Then, the decryptor 33 decrypts the encrypted content 17 read by the recording means 15 using the content key.

The decryption means 61 transfers the decrypted content 37 to the I/F4.

Hereinafter, the above-mentioned actions are repeated, that is, for each recording unit, the title key 35 is decrypted by the recording unit number 25 to generate a content key, the encrypted content 17 is read, and the encrypted content 17 is decrypted by the content key , the decrypted content 27 is sent to the I/F4 as an MPEG2 transport stream.

By using the encryption means 60 and the decryption means 61 described in this embodiment for the hard disk device 2, the same effect as that of the first embodiment can be obtained.

Also, of course, the encryption means 60 and the decryption means 61 can also be applied to various modifications described in the first embodiment.

(fifth embodiment)

Next, a fifth embodiment will be described.

FIG. 1 shows a hard disk device 2 as an embodiment of a recording device and a reproducing device according to the present invention. In the hard disk device 2 of the present embodiment, the encryption means 11 and the decryption means 12 of the hard disk device 2 described in the first embodiment are replaced with other encryption means and decryption means.

FIG. 13 shows the encryption means 62 of the hard disk device 2 of this embodiment. 14 shows the decryption means 63 of this embodiment.

In this embodiment, the description will focus on the encryption means 62 and the decryption means 63 which are different points from the first embodiment.

In FIG. 13 , the encryption means 62 is composed of an adder 54 , an encryptor 55 , and an encryptor 21 . Unlike the encryption means 11, the encryption means 62 of this embodiment does not use a title key for encryption of AV data.

That is, the adder 54 is a means for generating key generation information to which CCI24 is added to the lower bits of the device unique key 13 .

Also, the information for key generation in this embodiment is an example of the first information of the present invention.

The encryptor 55 is a means for encrypting key generation information using the recording unit number 25, that is, generating a content key.

The encryptor 21 is a means for encrypting the content 26 using a content key.

Fig. 14 shows the decryption means 63 of the hard disk device 2 of this embodiment.

In FIG. 14 , the decryption means 13 is composed of an adder 56 , a decryptor 57 , and a decryptor 33 .

The adder 56 is a means for reading the device unique key 13 stored in the secret area 18 and generating key generation information in which the CCI36 is added to the lower bits of the device unique key 13 .

The decryptor 57 is means for decrypting the key generation information using the recording unit number 25 to generate a content key.

The decryptor 33 is means for decrypting the encrypted content 17 using the content key and outputting the decrypted content 37 .

Next, the operation of the present embodiment will be described centering on the operations of the encryption means 62 and the decryption means 63 which are different points from the first embodiment.

First, the operation of the encryption means 62 will be described.

The adder 54 reads the device unique key 13 stored in the secret area 18 . Then, key generation information in which CCI24 is added to the lower bits of the device unique key 13 is generated.

In addition, the encryption means 62 detects the CCI 24 added and transmitted to the AV data. Under the control of the control means 14 , the detected CCI 24 is recorded on the disk medium 29 of the recording means 15 as CCI 27 .

Then, the adder 54 generates information for key generation that is appended to the lower order CCI 24 of the device unique key 13 .

The encryption means 62 obtains the recording unit number 25 of the recording unit to be recorded.

The encryptor 55 encrypts the key generation information using the recording unit number 25 of the recording unit in which the AV data is to be recorded. This encrypted information is called a content key. Since the content key is encrypted with the recording unit number 25, it is different for each recording unit.

Next, the encryptor 21 encrypts the content 26, which is the AV data recorded at this point, with the content key.

Under the control of the control means 14, the encrypted AV data is recorded as the encrypted content 17 in the recording unit of the disk medium 29 of the recording means 15 to be recorded.

Hereinafter, the above-mentioned operation is repeated in the same way, that is, for each recording unit, the key generation information is encrypted with the recording unit number 25 to generate a content key, the content 26 is encrypted with the generated content key, and the encrypted content 17 is recorded. to disk media29.

In this way, the hard disk medium 29 records the AV data on which the copyright must be protected on the magnetic disk medium 29 .

Next, the operation of the decryption means 63 will be described.

The adder 56 reads out the device unique key 13 stored in the secret area 18 .

According to the control of the control means 14, the recording means 15 reads the CCI27 from the magnetic disk medium 29.

The decryption means 63 sends the CCI27 to the I/F4.

The adder 56 generates key generation information in which the CCI 27 is added to the lower bits of the device unique key 13 .

The control means 14 designates the recording unit 39 to be read and performs control so that the recording means 15 reads out the encrypted content 17 which is the information stored in the recording unit 39 .

The decryption means 63 obtains the recording unit number 25 of the recording unit 39 .

The decryptor 57 decrypts the key generation information using the recording unit number 25 of the recording unit 39 from which data is to be read. This decrypted information is called a content key. Since the content key is decrypted by the recording unit number 25, it is different for each recording unit.

Then, under the control of the control means 14, the recording means 15 reads the encrypted content 17 which is the information stored in the recording unit to be read out of the magnetic disk medium 29.

Then, the decryptor 33 decrypts the encrypted content 17 read out by the recording means 15 using the content key.

The decryption means 63 transfers the decrypted content 37 to the I/F4.

Hereinafter, the above-mentioned operation is repeated in the same way, that is, for each recording unit, the key generation information is decrypted with the recording unit number 25 to generate a content key, the encrypted content 17 is read, and the encrypted content 17 is encrypted by the content key. Decrypt, and send the decrypted content 27 to I/F4 as an MPEG2 transport stream.

By using the encryption means 62 and the decryption means 63 described in this embodiment for the hard disk device 2, the same effect as that of the first embodiment can be obtained.

Also, of course, the encryption means 62 and the decryption means 63 can also be adapted to the various modified examples described in the first embodiment.

(sixth embodiment)

Next, a sixth embodiment will be described.

FIG. 1 shows a hard disk device 2 as an embodiment of the recording device and the reproducing device of the present invention. In the hard disk device 2 of the present embodiment, the encryption means 11 and the decryption means 12 of the hard disk device 2 described in the first embodiment are replaced with other encryption means and decryption means.

FIG. 15 shows the encryption means 64 of the hard disk device 2 of this embodiment. Also, Fig. 16 shows the decryption means 65 of this embodiment.

In this embodiment, the description will focus on the encryption means 64 and the decryption means 65 which are different points from the first embodiment.

In FIG. 15 , the encryption means 64 is composed of the encryptor 58 and the encryptor 21 . Unlike the encryption means 11, the encryption means 64 of this embodiment does not use a title key or CCI for encryption of AV data.

That is, the encryptor 58 is a means for encrypting the device unique key 13 using the recording unit number 25, that is, generating a content key.

Also, the device unique key 13 of this embodiment is an example of the first information of the present invention.

The encryptor 21 is a means for encrypting the content 26 using a content key.

Fig. 16 shows the decryption means 65 of the hard disk device 2 of this embodiment.

In FIG. 16 , decryption means 65 is composed of decryptor 59 and decryptor 33 .

The decryptor 59 is means for decrypting the device unique key 13 using the recording unit number 25 to generate a content key.

The decryptor 33 is means for decrypting the encrypted content 17 using the content key and outputting the decrypted content 37 .

Next, the operation of the present embodiment will be described centering on the operations of the encryption means 64 and the decryption means 65 which are different points from the first embodiment.

First, the operation of the encryption means 64 will be described.

The encryption means 64 detects the transmitted CCI 24 attached to the AV data. Under the control of the control means 14 , the detected CCI 24 is recorded on the disk medium 29 of the recording means 15 as CCI 27 .

The encryptor 58 reads the device unique key 13 from the secret area 18 .

The encryption means 64 obtains the recording unit number 25 of the recording unit to be recorded.

The encryptor 58 encrypts the device unique key 13 with the recording unit number 25 of the recording unit in which the AV data is to be recorded. This encrypted information is called a content key. Since the content key is encrypted with the recording unit number 25, it is different for each recording unit.

Next, the encryptor 21 encrypts the content 26, which is the AV data recorded at this point, with the content key.

Under the control of the control means 14, the encrypted AV data is recorded as the encrypted content 17 in the recording unit of the disk medium 29 of the recording means 15 to be recorded.

Hereinafter, the above-mentioned actions are repeated, that is, for each recording unit, the device unique key 13 is encrypted with the recording unit number 25 to generate a content key, and the content 26 is encrypted with the generated content key, and the encrypted content 17 is recorded. to disk media 29 .

In this way, AV data requiring copyright protection is recorded on the disk medium 29 .

Next, the operation of the decryption means 63 will be described.

The decryptor 59 reads the device unique key 13 stored in the secret area 18 .

According to the control of the control means 14, the recording means 15 reads the CCI27 from the magnetic disk medium 29.

Decryption means 65 transmits CCI27 to I/F4.

The control means 14 designates the recording unit 39 to be read and performs control so that the recording means 15 reads out the encrypted content 17 which is the information stored in the recording unit 39 .

The decryption means 63 obtains the recording unit number 25 of the recording unit 39 .

The decryptor 59 decrypts the device unique key using the recording unit number 25 of the recording unit 39 from which data is to be read. This decrypted information is called a content key. Since the content key is decrypted by the recording unit number 25, it is different for each recording unit.

Then, under the control of the control means 14, the recording means 15 reads the encrypted content 17 which is the information stored in the recording unit to be read out of the magnetic disk medium 29.

Then, the decryptor 33 decrypts the encrypted content 17 read by the recording means 15 using the content key.

The decryption means 63 transfers the decrypted content 37 to the I/F4.

Hereinafter, the above actions are repeated, that is, for each recording unit, the device unique key is decrypted with the recording unit number 25 to generate a content key, the encrypted content 17 is read out, and the encrypted content 17 is decrypted by the content key , and send the decrypted content 27 to the I/F4 as an MPEG2 transport stream.

In this way, the decryption means 65 decrypts the encrypted content 17 .

By using the encryption means 64 and the decryption means 65 described in this embodiment for the hard disk device 2, the same effect as that of the first embodiment can be obtained.

Also, of course, the encryption means 64 and the decryption means 65 can also be adapted to the various modified examples described in the first embodiment.

Also, various encryption means and decryption means have been described in the fourth to sixth embodiments, but they are not limited thereto. For example, the means shown in FIGS. 11 and decryption means 12.

The encryption means 73 is shown in FIG. 17(a). The encryption means 73 adopts the device unique key 13, and the content 26 is encrypted by the encryptor 67.

Also, the decryption means 74 is shown in FIG. 17(b). The decryption means 74 decrypts the content 17 encrypted by the encryption means 73 using the device unique key 13 and outputs the decrypted content 37 .

The encryption means 75 is shown in FIG. 18(a). The encryption means 75 uses the recording unit number 25 and encrypts the content 26 by the encryptor 69 .

Also, the decryption means 76 is shown in FIG. 18(b). The decryption means 76 decrypts the content 17 encrypted by the encryption means 75 by the decrypter 70 using the recording unit number 25, and outputs the decrypted content 37.

The encryption means 77 is shown in FIG. 19(a). The encryption means 77 adopts the device unique key 13 and the recording unit number 25, and encrypts the content 26 by the encryptor 71. Alternatively, an adder may be added to the encryption means 77, the adder combines the device unique key 13 and the recording unit number 25, and the encryptor 71 encrypts the content 26 using this information.

Also, the decryption means 78 is shown in FIG. 19(b). The decryption means 78 uses the device unique key 13 and the recording unit number 25 to decrypt the content 17 encrypted by the encryption means 77 by the decryptor 72 .

Also, an adder may be added to the decryption means 78, the adder combines the device unique key with the recording unit number 25, and the encrypted content 17 is decrypted by the signal decryptor 72.

(seventh embodiment)

Next, a seventh embodiment will be described.

FIG. 20 shows the structure of a hard disk device 83 as an embodiment of the recording device and reproducing device of the present invention.

The hard disk device 83 includes the CCI determination means 79 and the playback information management means 80 in addition to the hard disk device 2 of the first embodiment. Also, an I/F 81 is provided instead of the I/F in the first embodiment, and a control means 82 is provided instead of the control means 14 of the first embodiment.

The difference between the I/F 81 and the I/F 4 of the first embodiment is that even when the CCI of the AV data obtained from the IEEE1394 bus 1 is copy-prohibited, the controller 10 is notified of the start of the recording process. Notification from the I/F 81 enables recording of AV data under predetermined conditions even when the CCI of the AV data is copy prohibition.

Also, the CCI judging means 79 is means for judging the CCI value of the reproduced AV data and determining the reproduced CCI value.

The reproduction information management means 80 is means for managing reproduction information, and the reproduction information is information indicating whether the AV data recorded in the recording means 15 has been reproduced once or not reproduced for each recording unit.

Furthermore, the playback management means 80 is also a means for managing information on whether the AV data recorded in the recording means 15 has been copied by other devices or has not been copied for each recording unit.

If it can be known from the playback information that the AV data recorded in the recording unit has been played back once or has not been played back once, the playback information can be indicated by a 1-bit flag, for example.

Also, referring to the copy information, it can be known that the AV data recorded in the recording unit has been copied once or has not been copied once.

In addition to the operation of the control means 14 of the first embodiment, the control means 82 also performs the following control operation, that is, the CCI of the AV data being reproduced is supplied to the CCI judging means 79, and the CCI of the AV data being reproduced and the The reproduction information generated and updated by the reproduction information management means 80 controls whether the recording means 15 reproduces the AV data, and the CCI of the AV data in the process of being copied to other equipment is provided to the CCI determination means 79. The CCI of the AV data and the copy information generated and updated by the playback information management means 80 control whether the recording means 15 copies the AV data.

Also, the CCI judging means 79, the control means 82, and the playback information management means 80 of this embodiment are examples of the control means of the present invention, and the I/F 81 of this embodiment is an example of the interface of the present invention.

Next, the operation of the above-mentioned present embodiment will be described focusing on differences from the first embodiment.

First, the operation at the time of recording will be described.

AV data is transferred from the host system.

The I/F 81 notifies the controller 84 to start recording even when the CCI of the AV data is copy prohibition.

The encryption means 11 encrypts AV data.

The recording means 15 records the encrypted AV data on the magnetic disk 29 under the control of the control means 82 . In this case, CCI is also recorded as in the first embodiment.

However, the control means 82 records the AV data even when the CCI is copy prohibition. On the other hand, the CCI recorded in the recording means 15 is copy-prohibited AV data that cannot be reproduced after a predetermined time after being recorded. How to prevent playback after a specified time will be described below.

Also, the control means 82 outputs the AV data whose CCI is allowed to be copied once to copy the data, but it cannot be reproduced after a predetermined time after being copied and outputted. This will also be described below.

The playback information management means 80 generates playback information and copy information as follows when recording AV data in the recording means 15 for each recording unit.

That is, when re-recording AV data, the reproduction information is set to non-reproduction and the copy information is set to non-copying for each recording unit. Furthermore, the time at which the AV data is recorded is recorded.

Next, the operation for reproducing the AV data thus recorded will be described.

The reproduction information management means 80 refers to the reproduction information of the AV data of the recording unit whose reproduction is thus started and notifies the control means 82 .

Furthermore, the CCI judging means 79 judges the CCI value of the AV data whose reproduction is started, and determines the CCI value when it is reproduced and output.

That is, when the CCI of the reproduced AV data is copy prohibited, the CCI at the time of output from the I/F 81 is regarded as copy prohibited. Also, when the CCI of the reproduced AV data permits copying once, the CCI at the time of output from the I/F 81 is changed to not permitting copying. Also, when the CCI is copy free, the CCI output from the I/F 81 is copy free. Also, since the value of the CCI is not recorded as the AV data whose copying is no longer permitted, the CCI does not indicate that the copying is no longer permitted.

According to the control of the control means 82, the recording means reproduces the AV data.

The playback information management means 80 updates the playback management information as follows.

That is, when the AV data of the recording unit portion is reproduced, the reproduction information is notified to the control means 82 . Also, when the AV data of the recording unit portion is reproduced, the reproduction information of the portion is set as reproduction completed.

The playback information management means 80 notifies the control means 82 when the playback information of the AV data currently being played back is completed.

Furthermore, the playback information management means 80 notifies the control means 82 of the time information of the AV data currently being played back.

The control means 82 performs the following operations based on the value of the CCI before being changed by the CCI determination means 79 .

That is, if the CCI is copy-prohibited AV data, control is performed so that the playback of the playback completed part of the playback information is stopped. Also, when a notification is sent from the playback information management means 80, and the current time has passed a predetermined time such as 240 hours (10 days) or more from the time indicated by the time information related to the AV data, it is controlled so that no This AV data is reproduced.

Also, when the CCI is AC data that is allowed to be copied once, control is performed so that playback continues regardless of the value of the playback information.

Also, when the CCI is for copy-free AV data, control is performed so that reproduction is continued.

The AV data reproduced in this way is decrypted by the decryption means 12 .

Then, it is encrypted for transmission at the I/F 81 and output to the IEEE1394 bus 1 as an isochronous packet. At this time, the CCI determined by the CCI determination means 79 is added to the synchronization header as described above.

Next, an operation when copying AV data recorded as described above will be described.

The playback information management means 80 refers to the copy information of the AV data of the record unit to be copied from then on, and notifies the control means 82 .

Furthermore, the CCI judging means 79 judges the CCI value of the AV data copied from then on, and determines the CCI value when it is reproduced and outputted.

That is, when the CCI of the reproduced AV data is copy prohibition, the CCI at the time of output from the I/F 81 is not set or is copy prohibition. Also, when the CCI of the AV data to be reproduced is copy once, the CCI at the time of output from the I/F 81 is kept as it is once and is not changed so that copy is no longer permitted. Also, when the CCI is copy-permitted, the CCI at the time of output from the I/F 81 is made to be copy-permitted. Also, since the value of CCI is not recorded as AV data whose copying is no longer permitted, the CCI does not indicate that copying is no longer permitted.

According to the control of the control means 82, the recording means reproduces the copied AV data.

The playback information management means 80 updates the copy management information as follows.

That is, when the AV data of the recording unit is copied, the control means 82 is notified of the copy information. Also, when copying the AV data of the recording unit part, the copy information of the part is set as copy completed.

The playback information management means 80 notifies the control means 82 when the copy information of the AV data currently being copied has been copied.

The control means 82 performs the following operations based on the value of the CCI before being changed by the CCI determination means 79 .

That is, if the CCI is copy-prohibited AV data, control is performed so that copying is not performed.

Also, when the CCI is AV data that permits copying once, control is performed so that copying of the part where the copy information is copied is not performed, and when the copy information is not copied, the device that is limited to recording the part of the AV data is used as In the case of a device for recording the data for backup, control is performed so that copying is continued.

Also, when the CCI is AV data whose copying is permitted, control is continued so that copying is continued.

For copying in this way, the reproduced AV data is decrypted by the decryption means 12 .

Then, it is encrypted for transmission at the I/F 81 and output to the IEEE1394 bus 1 as an isochronous packet. At this time, the CCI determined by the CCI determination means 79 is added to the synchronization header as described above. Received and recorded by other devices via IEEE1394 bus 1.

Also, when the CCI of the copied AV data is copy-once permission, the AV data cannot be reproduced by the recording device recorded as a backup, and cannot be reproduced unless it is returned to the original hard disk 83.

That is, the hard disk drive 83 of this embodiment records copy-prohibited AV data and can reproduce it only once.

Since it is not allowed to record AV data whose CCI is copy-prohibited, it can be viewed only during the broadcast period.

However, according to the hard disk device 83 of the present embodiment, viewing can be performed in a time slot different from the time slot in which AV data is broadcast while maintaining the original intention of the copyright owner.

Also, the CCI that allows only one copy is AV data that is allowed to be copied once. That is, once AV data that is permitted to be copied once is recorded, the AV data can only be played back from the device that recorded the data.

However, if the hard disk device 83 of the present embodiment is used, since the AV data permitted to be copied once can be copied only once according to the CCI that permits copying once, the AV data can be moved to other sites while maintaining the original intent of the copyright. record playback device.

Also, in the case described in this embodiment, the playback information management means 80 notifies the playback information to the control means 82 when playing back the AV data of the record unit part, and when the AV data of the record unit part is played back, By setting the reproduction information of this part as reproduction completed, the hard disk device 83 of this embodiment can reproduce AV data whose CCI is copy prohibition only once, but the present invention is not limited thereto. The playback information management means 80 may also configure a method of updating playback information as follows.

That is, the playback information management means 80 may also count how many times the AV data of the recording unit has been played back, and set the playback information of the AV data of the recording unit to be repeated until a predetermined number of times, for example, 5 times, has been played back. put completed. In this manner, the hard disk device 83 can reproduce data whose CCI is copy-prohibited only a predetermined number of times.

Furthermore, the playback information management means 80 may also count the number of times the parts recorded in each recording unit in one AV data are played back, and the parts recorded in all the recording units of one AV data are all played back. At this time, the reproduction information management means 80 sets the reproduction management information of the portion recorded in all recording units of the one AV data as reproduction completion. In this way, the hard disk device 83 can reproduce part of the AV data for which the CCI is copy-prohibited an infinite number of times, and cannot reproduce the AV data after all of the AV data has been reproduced.

Furthermore, in the present embodiment, the case where playback cannot be performed after a predetermined period of time has elapsed since the recording of AV data whose CCI is copy-prohibited has been described, but it is not limited to this, and may be based on charging conditions. AV data whose CCI is copy-prohibited is copy-prohibited. As such charging conditions, when AV data whose CCI is copy-prohibited is recorded, playback can be performed if a predetermined fee is paid, and playback cannot be performed unless payment is made.

Furthermore, in the case described in this embodiment, for the AV data whose CCI is permission to copy once, when the copy information is not copied, the device that records the part of the AV data is limited to the device that records the data as a backup. In the case of the device, it is controlled so that copying is continued, but it is not limited to this. After a predetermined time has elapsed since the recording of AV data whose CCI is permitted to be copied once, the recorded AV data or the encryption when recording the data may be deleted. the key used.

In this way, the hard disk device 83 of the present embodiment records CCI as copy-prohibited AV data, or reproduces AV data whose CCI is permitted to be copied only once in accordance with the CCI that permits copying once, so it can be said that the copyright owner can be protected. intended to resist copyright infringement. That is, this is because when the CCI is copy prohibition, it means that copying is absolutely impossible. However, studies are currently under way to use extended CCI to define the meaning of such CCI. In the extended CCI, the meanings of prohibition of copying and permission of copying once are extended and explained. The hard disk device 83 of the present embodiment can also perform the above-mentioned operations by using the extended CCI instead of the conventional CCI. In this way, if the hard disk device 83 of this embodiment uses the extended CCI to perform the above-mentioned operations, the copyright will not be violated.

In this manner, according to the hard disk device 83 of this embodiment, AV data that cannot be recorded can be viewed at any time other than the broadcast time zone. Also, since AV data whose copy is allowed only once can be moved to another recording device, it can be used as a backup device.

Also, AV data that is not allowed to be recorded can be viewed or backed up at any time period other than the broadcast time period, which will be described in more detail in the following embodiments.

In addition, it goes without saying that various modifications described in the first embodiment can also be made to the hard disk device 83 of this embodiment.

Furthermore, the hard disk device 83 of the present embodiment has been described as having the encryption means 11 and the decryption means 12, but the encryption means and decryption means described in the first embodiment and later may be used.

Note that the data of the present invention is not limited to the AV data of this embodiment. Computer programs such as text data and image data transmitted via the Internet, game software, and text generation software transmitted via the Internet may also be used. In short, the data of the present invention need only be data that can be recorded on the disc of the present invention and reproduced from the disc of the present invention to be used.

Furthermore, the interface of the present invention is not limited to the IEEE1394 interface in this embodiment, and a USB interface may also be used.

Furthermore, the disk of the present invention is not limited to the magnetic disk medium of this embodiment, and may be an optical disk medium, a magneto-optical disk medium, or the like. In short, the disc of the present invention may be any recording medium that can randomly access data during recording and/or reproduction.

Note that the copy permission information of the present invention is not limited to the CCI and extended CCI in the present embodiment, and may be any information indicating whether or not copy data is permitted.

Also, in the above-mentioned embodiment, as the value of the CCI added to the AV data, the cases where copying is prohibited, copying is permitted once, re-copying is prohibited, and free copying is permitted have been described. In Embodiments 8 to 11, AV data whose CCI value is any one of Copy Prohibited, Copy Once Permitted, and Re-Copy Prohibited are all handled as copy prohibited data. Also, which of the above-mentioned copy prohibition, copy once permission, and recopy prohibition that the CCI of the copy prohibition data corresponds to will be individually described in the eighth to eleventh embodiments.

(eighth embodiment)

Next, the configurations of AVHDD 1001 and archiving device 1002 according to the eighth embodiment of the present invention will be described.

Fig. 21 shows a block diagram of AVHDD 1001 and archiving device 1002 according to the eighth embodiment of the present invention. In addition, in FIG. 21, STB (Set Top Box) 1003 is also shown for convenience of description.

AVHDD 1001 according to the eighth embodiment of the present invention, as shown in FIG. 21, comprises encryption means 1004 which encrypts data from STB 1003 with an encryption key unique to AVHDD 1001, and records the data encrypted by encryption means 1004 on a recording medium in storage means 1006. The first recording means 1005, the storage means 1006 for storing data, the moving means 1007 for moving the data stored in the storage means 1006 to the archiving device 1002, and interpreting the data from the archiving device 1002 that is encrypted by the encryption key unique to AVHDD1001 The reproducing means 8 for reproducing the data is constituted. Also, the storage means 1006 has a first recording medium on which data is recorded, and records data on the first recording medium.

Also, in "Embodiment of the Invention", AVHDD is used as a word indicating a device for recording and reproducing audio (Audio), video (Video) and other data using a hard disk drive (HDD).

Next, as shown in FIG. 21, the archiving device 1002 of the eighth embodiment of the present invention consists of the second recording means 1009 for recording data from the AVHDD 1001 to the second recording medium 1010, the second recording medium 1010, and the readout of the data recorded on the second recording medium 1010. 2 The transmission means 1011 that records the data in the medium 1010 and transmits it to the AVHDD 1001 is configured. Also, the archiving device 1002 corresponds to, for example, a DVD device. D-VHS device, in this embodiment, a DVD device is used as an example of the archiving device 1002 for description. Therefore, as an example of the second recording medium 1010, it corresponds to a DVD.

Also, STB1003 is, for example, means for receiving data from a broadcasting station and outputting the data to AVHDD1001 and simultaneously reproducing the data from AVHDD101. If the reproduced data is video data, it is displayed on a display connected to STB1003. If it is audio data, it is output from the speaker connected to STB1003. Also, the display and speakers are not shown in the figure.

In addition, in the eighth embodiment, an AVHDD 1001 is used as an example of the data processing device of the present invention, and an archive device 1002 is used as an example of the recording/reproducing device.

In addition, the first recording medium in the storage means 1006 of the AVHDD 1001 may be a removable recording medium or a fixed installation type recording medium. Similarly, the second recording medium 1010 in the archiving device 1002 may be a removable recording medium or a fixed-installation recording medium.

In addition, the connection between AVHDD 1001 and archive device 1002 may be performed through an interface of IEEE1394 standard or an interface of IDE standard. Also, it can also be performed through other interfaces. The connection between AVHDD1001 and STB1003 can also be done through any interface.

Next, the operations of AVHDD 1001 and archive device 1002 according to the eighth embodiment of the present invention will be described.

Hereinafter, for convenience of description, the recordable capacity of the first recording medium in the storage means 1006 of the AVHDD1001 is taken as the limit, and any data must be rewritten or deleted before new data from the STB1003 can be stored. An instruction to move the data in the storage means 1006 to the second recording medium 1010 in the archive device 1002 is given to the AVHDD 1001 and the archive device 1002 .

Also, data movement means, for example, that data recorded on a first recording medium is moved to another second recording medium, and that the moved data is not retained in the first recording medium after the move.

Also, for the convenience of the following description, it is assumed that data moved from AVHDD 1001 to archive device 1002 is encrypted by encryption means 1004 with an encryption key unique to ACHDD 1001 and is recorded in the first recording medium in storage means 1006 by first recording means 1005. Also, for copyright protection, the data to be moved is made to be copy-prohibited data that permits movement to another recording device but prohibits copying.

At this time, the moving means 1007 reads the copy prohibition data encrypted with the encryption key unique to the AVHDD 1001 from the first recording medium in the storage means 1006 and sends it to the archiving device 1002 . In this way, when the mobile means 1007 transmits the copy prohibition data (at the time of moving), the mobile means 1007 outputs the copy prohibition data as data that can be copied only once.

Then, in archive device 1002 , second recording means 1009 records the copy prohibition data from AVHDD 1001 on second recording medium 1010 . Also, the data moved to the archiving device 1002 by the moving means 1007 is moved to the archiving device 1002 while being encrypted without being decrypted in the AVHDD 1001 . Therefore, the data recorded on the second recording medium 1010 by the second recording means 1009 is copy prohibition data encrypted with an encryption key unique to the AVHDD 1001 .

Next, a case of reproducing encrypted copy-prohibited data recorded on the second recording medium 1010 will be described. As shown in FIG. 21, in the archive device 1002, since there is no means for decoding and reproducing the encrypted copy prohibition data, it is necessary to move the data again to AVHDD 1001 that can decode and reproduce the copy prohibition data. means 1008.

Here, when reproducing the encrypted copy prohibition data recorded in the second recording medium 1010, the transmission means 1011 reads out the data recorded in the second recording medium 1010 and sends it to the AVHDD1001. In the AVHDD1001, the reproduction means Step 1008 decodes the encrypted copy-prohibited data and reproduces it.

The data after this interpretation is output to STB1003, if it is video data, it will be displayed on the monitor connected to STB1003, if it is audio data, it will be output from the monitor connected to STB1003.

In this way, for example, even if the recordable capacity of the first recording medium in the storage means 1006 of the ACHDD 1001 reaches the limit, the data can be moved to Other recording media, therefore, have the advantage of being able to play back moved data.

Also, even if the same media as the second recording medium 1010 corresponding to the archiving device 1002 is copied and distributed in large quantities due to fraud, the data recorded in the media is encrypted by the encryption means 1004 of the AVHDD 1001 with The AVHDD 1001 has encrypted data with an encryption key unique to the AVHDD 1001. Therefore, only the AVHDD 1001 can reproduce the data, and the copy-prohibited data, which is the copyright protection target data, can protect its copyright and move it to the archive device 1002, which is another device. Therefore, safe movement of data can be realized. Also, many AVHDD1001 produced have different intrinsic encryption keys.

Also, in the above-mentioned embodiment, the copy prohibition data is encrypted by the encryption means 1004 of the AVHDD1001 with the encryption key unique to the AVHDD1001, but the copy prohibition data is not limited to being encrypted by the encryption means 1004. For example, copy prohibition data encrypted with an encryption key unique to AVHDD 1001 may be recorded on the first recording medium in storage means 1006 at the manufacturing stage of AVHDD 1001 .

Also, in the above-described embodiment, the copy prohibition data is the first recording medium recorded in the storage means 1006 after being encrypted by the encryption means 1004, but the encryption means 1004 may also be set between the storage means 1006 and the moving means 1007, When copying prohibited data and moving with mobile means 1007, it is encrypted using the encryption key fixed in HVHDD1001. In short, the copy-prohibited data that the moving means 1007 wants to move should at least be encrypted with an encryption key unique to the AVHDD 1001 when output from the AVHDD 1001 . Also, in the present embodiment, the copy-prohibited data is data that is permitted to be moved to another recording device and is prohibited from being copied, and the "copy-prohibited data" in the "invention embodiment" is represented as "01" by 2 bits. The data of "Copy Prohibited Hereafter" and the data of "Copy Absolutely Prohibited" expressed as "11" in 2 bits.

Again, the transmission means 1011 of the above-mentioned embodiment described in FIG. 21 can also be replaced with the data recorded in the second recording medium 1010 as shown in FIG. It is sent to the high-speed sending means 1015 of AVHDD1001. At this time, the AVHDD1001 in FIG. 21 is replaced with the AVHDD1012 which also has a buffer 1014 as a data storage means, and the data from the high-speed transmission means 1015 can be temporarily stored in the buffer 1014, and then reproduced by the playback means 1008. The temporarily stored data.

Then it brings the advantage that the data can be transferred at N times speed (high speed) from the archive device 1013 to the AVHDD 1012, and at the same time, the data can be played back in the AVHDD 1012 as usual. Also, the buffer 1014 may be provided in the storage means 1006 . Also, "normal N-time speed" refers to a speed faster than the data reproduction speed required for the user to watch when the reproduction means 1008 reproduces the data.

In addition, in the example described using FIG. 22 , the high-speed transmission means 1015 is provided in the archive device 1013, and the data is transmitted from the archive device 1013 to the AVHDD1012 at an N-time speed (high speed). It is a high-speed moving means to move to the archive device at a high speed of N times (N is a positive number exceeding 1). At this time, it is preferable to install a buffer for temporarily storing data in the archive device. Thus, when a high-speed moving means is provided in the AVHDD, there is an advantage that data can be moved from the AVHDD to the archive device in a short time. Also, in the AVHDD of Embodiment 9 described later, if a high-speed moving means is provided instead of the moving means, there is also an effect that data can be moved in a short time.

In addition, in the above-mentioned embodiment, the archiving device 1002 is not provided with a means for decoding and reproducing the data encrypted with the encryption key unique to the AVHDD 1001. However, as shown in FIG. 23, the archiving device 1002 may be replaced with The archiving device 1016 having the decoding and reproducing means 1017 capable of decoding and replaying the data encrypted with the encryption key unique to AVHDD 1001 does not need to send data to the AVHDD 1001. key to encrypt the data.

In this way, when data encrypted with the encryption key unique to AVHDD 1001 can be decoded and reproduced in archive device 1016, the problem of having to connect archive device 1002 to AVHDD 1001 just to reproduce data is solved.

Also, in order to decipher and replay the encrypted data for the decoding and replaying means 1017 of the archiving device 1016, the inherent encryption key of the AVHDD 1001 is necessary, and an IC card slot may also be provided in the archiving device 1016 in advance, as shown in FIG. 23 , when When the IC card 1018 on which the encryption key unique to AVHDD 1001 is recorded is inserted into the IC card slot, the reading and reproducing means 1017 obtains the encryption key unique to AVHDD 1001 from the IC card 1018, and uses the encryption key to decode and reproduce the encrypted data. put.

Also, when the IC card 1018 is used, in addition to the decoding and reproducing means 1017, a key reproducing means for reproducing the IC card 1018 may also be provided in the archiving device 1016. In addition, a key storage means for storing an encryption key unique to the AVHDD 1001 from the IC card 1018 may be provided in the archiving device 1016 . In this way, if the key storage means is provided in the archiving device 1016, when reading and replaying the data encrypted with the encryption key unique to the AVHDD 1001 recorded in the second recording medium 1010, it is possible to avoid having to replace the IC card every time. 1018 is inserted into the IC card slot. Also, as the key recorded in the IC card 1018, a secret key and a public key may be combined in order to prevent leakage of the key.

Also, in the above-mentioned description, the decoding and reproducing means 1017 directly or indirectly acquires the encryption key unique to the AVHDD 1001 from the IC card 1018, but the IC card 1018 may also be replaced, and the decoding and reproducing means 1017 may record or embed the encryption key of the AVHDD 1001. The encryption key is obtained from the key disk and the key box with the inherent encryption key. In addition, an encryption key unique to AVHDD 1001 may be recorded on second recording medium 1010 . In this case, the IC card 1018, the key disk, and the key box are unnecessary.

Also, instead of using the IC card 1018, the key disk or the key box, the AVHDD 1001 may be provided with a means for sending the encryption key unique to the AVHDD 1001, and at the same time, the archiving device 1016 may be provided with a means for receiving the encryption key from the AVHDD 1001. , then the interpretation and replay means 1017 uses the sent encryption key to decrypt and replay the encrypted data.

Also, in the above-mentioned embodiment, as shown in FIG. 21, AVHDD 1001 unconditionally moves the encrypted data to archive device 1002. However, as shown in FIG. 24, the second recording medium of archive device 2 in FIG. 1010 is replaced with a second recording medium 1021 that records authentication information indicating that it is a recording medium corresponding to AVHDD 1019. At the same time, AVHDD 1001 is replaced with AVHDD 1019 having a judging means 1020 that judges the second recording medium. Whether medium 1021 is the recording medium corresponding to AVHDD1019, only when judging means 1020 judges that the second recording medium 1021 is the recording medium corresponding to AVHDD1019, moving means 1007 moves data from AVHDD1019 to archive device 1002.

Also, if the authentication information is recorded on the second recording medium 1021, then the judging means 1020 judges that the second recording medium 1021 is a recording medium corresponding to the AVHDD1019; AVHDD1019 does not correspond.

However, in order to distinguish the second recording medium 1021 recording the authentication information from the recording medium without recording the authentication information, the surface of the disc may have a color different from that of the surface of the recording medium without recording the authentication information. Therefore, it may be more expensive than a recording medium that does not record authentication information to a certain extent. In this way, all or part of the difference in price from a recording medium on which no authentication information is recorded can be returned to the copyright owner or copyright body.

Also, when the second recording medium 1021 is a recording medium corresponding to the AVHDD 1019, the data may not be moved from the AVHDD 1019 to the archive device 1002, and when the archive device 1002 is a device corresponding to the AVHDD 1019, the data may be moved from the AVHDD 1019 to the archive device. 1002. At this time, AVHDD 1019 is provided with judging means for judging whether or not archive device 1002 is a device corresponding to AVHDD 1019 .

Also, when it is confirmed that there is a management device capable of charging at least the movement of copy-prohibited data on the interface connecting AVHDD1001 and archive device 1002, the moving means 1007 of AVHDD1001 may also cause the copy-prohibited data to be moved to archive device 1002. In addition, as an example of the management device, there is an STB.

Also, in the above-described embodiment, the copy prohibition data is moved from the AVHDD to the archive device. That is, after causing the copy prohibition data to move to the archive device, the copy prohibition data is deleted from the AVHDD. However, sometimes it is better to keep the copy-prohibited data in the AVHDD as a backup because it is considered impossible to handle the copy-prohibited data in the archive device.

At this time, if the moving means 1007 of each AVHDD in the above-mentioned embodiment is replaced with a copy means that copies the copy prohibition data to the archive device, the copy prohibition data can be backed up and stored in the AVHDD while the copy prohibition data is sent to the archive device. data, it has the advantage that even in the case where the copy-prohibited data cannot be processed in the archive device, the copy-prohibited data stored in the AVHDD can be backed up.

Here, as an example of the structure of the AVHDD provided with copy means, AVHDD 1001 provided with move means 1007 shown in FIG. 21 is replaced with AVHDD 1081 provided with copy means 1080 instead of move means 1007 .

(ninth embodiment)

Next, the configurations of AVHDD 1022 and archive device 1023 according to the ninth embodiment of the present invention will be described.

Fig. 25 shows a block diagram of AVHDD 1022 and archive device 1023 according to the ninth embodiment of the present invention. 21 of the above-mentioned eighth embodiment, STB 1003 is also shown in FIG. 25 for convenience of description.

In addition, AVHDD 1022 according to the ninth embodiment of the present invention, as shown in FIG. The unencrypted data conversion means 1026 that converts the data in the means 1025 into unencrypted data, and the moving means 1027 that moves the data stored in the storage means 1025 converted into unencrypted data by the unencrypted data conversion means 1026 to the archiving device 1023 .

The archiving device 1023 according to the ninth embodiment of the present invention is shown in FIG. The fourth recording means 1029 of the recording medium 1030, the third recording medium 1030, and the reproducing means 1031 for decrypting and reproducing the data recorded on the third recording medium 1030 using the encryption key unique to the archiving device 1023 are constituted. Also, as the archiving device 1023, it corresponds to, for example, a DVD device or a D-VHS device. In this embodiment, a DVD device is used as an example of the archiving device 1023 , and a DVD is used as an example of the third recording medium 1030 .

Also, in the ninth embodiment, an AVHDD 1022 is used as an example of the data processing device of the present invention, and an archive device 1023 is used as an example of the recording/reproducing device of the present invention.

Also, the recording medium in the storage means 1025 of the AVHDD 1022 may be a removable recording medium or a fixed installation type recording medium. Similarly, the third recording medium in the archiving device 1023 may be a removable recording medium or a fixed-installation recording medium.

Also, the connection between AVHDD 1022 and archiving device 1023 is the same as that of the eighth embodiment described with reference to FIG. 21, and can be connected through any type of interface.

Next, the operations of the AVHDD 22 and the archive device 23 according to the ninth embodiment of the present invention will be described.

The user instructs the AVHDD 1022 and the archive device 1023 to move the data in the storage means 1025 to the third recording medium 1030 in the archive device 1023 . Also, the so-called movement of data is the same as that described in the eighth embodiment, and means, for example, that the data recorded on the first recording medium is moved to another second recording medium and that the movement is not retained in the first recording medium after the move. The data.

Also, for convenience of description, the data to be moved is copy-prohibited data that is permitted to be moved to another recording device for copyright protection and is prohibited from being copied, and is data recorded by the third recording means 1024 on the recording medium in the storage means 1025 .

In addition, at this time, the unencrypted data conversion means 1026 generates unencrypted data from the data stored in the storage means 1025, and the moving means 1027 reads the copy prohibition data of the unencrypted data from the recording medium in the storage means 1025 and sends it to the archiving device. 1023. In this way, when the mobile means 1027 transmits the copy prohibition data (at the time of movement), the mobile means 1027 outputs the copy prohibition data as data that can only be copied once.

Then, in archive device 1023 , encryption means 1028 encrypts data from AVHDD 1022 using an encryption key unique to archive device 1023 , and fourth recording means 1029 records the data encrypted by encryption means 1028 into third recording means 1030 . Also, when the data is input to the archiving device 1023 or recorded on the third recording medium 1030, it is handled as copy-prohibited data.

In addition, on the data transfer path from AVHDD 1022 to archive device 1023, for example, data may be protected by DTCP.

Next, the case of reproducing the copy prohibition data encrypted with the encryption key unique to the archiving device 1023 recorded on the third recording medium 1030 will be described. At this time, the reproduction means 1031 reproduces the copy-prohibited data recorded on the third recording medium 1030 using the encryption key unique to the archiving device 1023 .

In this way, in the archive device 1023, since the data is encrypted and recorded with the encryption key unique to the archive device 1023, there is an advantage that the recorded data can be reproduced in the archive device 1023.

Also, in the above-mentioned embodiment, the encryption means 1028 of the archiving device 1023 is to use the encryption key inherent in the archiving device 1023 to encrypt the copy prohibition data from the AVHDD 1022, and when the encryption key is recorded in the third recording medium 1030, The encryption means 1028 may encrypt the copy prohibition data from the AVHDD 1022 using the encryption key recorded in the third recording medium 1030 . At this time, the reproduction means 1031 reproduces the copy prohibition data using the encryption key recorded in the third recording medium 1030 .

Also, in the above-mentioned embodiment, the data moved from AVHDD 1022 to archiving device 1023 is unencrypted data, but the mobile data may also be data encrypted with the encryption key inherent in archiving device 1023. When the encryption key is recorded in In the case of three recording media 1030, the mobile data may be data encrypted with an encryption key recorded on the third recording medium 1030.

At this time, AVHDD 1022 is provided with encryption means for encrypting the copy prohibition data using an encryption key unique to archive device 1023 or an encryption key recorded in third recording medium 1030 . Also, AVHDD 1022 is provided with a means for acquiring from archive 1023 an encryption key specific to archive 1023 or a means for acquiring from archive 1023 an encryption key recorded on third recording medium 1030 . Also, the encryption means 28 does not need to be installed in the archive device 1023 .

Also, the data moved from the AVHDD 1022 to the archive device 1023 may be in the format used by the archive device 1023 . At this time, AVHDD 1022 may be provided with format conversion means for converting the moved data into data in the format used by archive device 1023 . Also, in AVHDD 1022 , when recording data into storage means 1025 , the data may be recorded in a format used by archive device 1023 .

Also, as described with reference to FIG. 24 in the eighth embodiment, a judging means for judging whether or not the third recording medium 1030 is a recording medium corresponding to the AVHDD1022 may be provided in the AVHDD 1022. When the medium 1030 is a recording medium corresponding to the AVHDD 1022 , the moving means 1027 moves unencrypted data or encrypted copy-prohibited data to the archiving device 1023 .

And when in the 3rd recording medium 1030, add and represent whether this 3rd recording medium 1030 is the key of the recording medium corresponding to AVHDD1022, the judging means that is provided in AVHDD1022 also can utilize to add in the 3rd recording medium 1030 key to determine whether or not the third recording medium 1030 is a recording medium corresponding to the AVHDD 1022 .

Also, instead of judging whether or not the third recording medium 1030 is a recording medium corresponding to AVHDD 1022 and then moving data, it is also possible to judge whether or not archive device 1023 is a device corresponding to AVHDD 1022 and then move data. At this time, in AVHDD1022, a judging means for judging whether the archiving device 1023 is a device corresponding to AVHDD1022 is provided. Or the encrypted copy inhibited data is moved to the archive device 1023.

Also, when the archiving device 1023 has a key indicating whether it is a device corresponding to the AVHDD 1022, the judging means provided in the AVHDD 1022 may also use the key possessed by the archiving device 1023 to judge whether the archiving device 1023 is a device corresponding to the AVHDD 1022.

In addition, when it is confirmed that there is a management device capable of charging at least the movement of copy-prohibited data on the interface connecting AVHDD 1022 and archive device 1023, moving means 1027 of AVHDD 1022 may also move the copy-prohibited data to archive device 1023. Moreover, STB can be mentioned as an example of a management apparatus.

Furthermore, in the eighth embodiment and each AVHDD of Embodiment 2, means may be provided for transmitting billing information of the data transfer to a management device that manages each AVHDD when data transfer is performed. Also, as an example of the management device, STB 1003 including means for charging can be used.

Also, in the above-mentioned embodiment, the copy prohibition data is moved from the AVHDD to the archive device. That is, after the copy prohibition data is moved to the archive device, the copy prohibition data is deleted from the AVHDD. However, since it is considered that the copy prohibition data cannot be handled in the archive device, there are cases where it is preferable to keep the copy prohibition data in the AVHDD as a backup.

At this time, if the moving means 1027 of the AVHDD in the above-mentioned embodiment is replaced with a copying means for copying the copy-prohibited data to the archive device, the copy-prohibited data can be backed up and stored in the AVHDD while the copy-prohibited data is sent to the archive device. It has the advantage that even in the case where the copy prohibition data cannot be processed in the archive device, the copy prohibition data stored in the AVHDD can be backed up.

Here, as an example of the structure of the AVHDD provided with copy means, AVHDD 1022 provided with move means 1007 shown in FIG. 24 is replaced with AVHDD 1091 provided with copy means 1090 instead of move means 1027 .

(tenth embodiment)

Next, an encrypted data decryption recording system according to a tenth embodiment of the present invention will be described.

Fig. 30 shows the configuration of an encrypted data decryption recording system according to the tenth embodiment. As shown in FIG. 30, the encrypted data decryption recording system of the tenth embodiment is composed of five recording devices 1100a to 1100e and a decryption recording device 1101.

Fig. 31 shows the configuration of each recording device 1100 in the tenth embodiment. As shown in FIG. 31 , each recording device 1100 has recording means 1102 and output means 1103 for outputting data recorded on the recording means 1102 . Here, the data recorded in the recording means 1102 is encrypted copy prohibition data for prohibiting copying, and the encrypted copy prohibition data of the same content is recorded in the recording means 1102 of each recording device 1100 .

Next, Fig. 32 shows the configuration of a decryption recording device 1101 in the tenth embodiment. As shown in FIG. 32 , the decryption recording device 1101 has decryption means 1104 and recording means 1105 . Here, the decryption means 1104 is a means for decrypting the encrypted copy prohibition data output from the recording device 1100, and the recording means 1105 is for recording the encrypted copy prohibition data, which is data having the same content as the copy prohibition data recorded in the recording device 1100. or unencrypted means of copying prohibited data.

However, in the above-mentioned encrypted data decryption recording system of the tenth embodiment, the data of the same content are respectively recorded in the five recording devices 1100a-1100e and the decryption recording device 1101, and the encrypted copy prohibition data can only be recorded by decryption. The decryption means 1104 of the device 1101 to decrypt.

Therefore, when the encrypted data decryption recording system of the tenth embodiment is adopted, it has the effect that the copyright-protected data can be backed up while protecting the copyright.

In addition, the encrypted data decryption recording system of the above embodiment includes the recording devices 1100a to 1100e, and the number of recording devices 1100 is not limited to five. In short, there may be more than one.

(Eleventh Embodiment)

Next, AVHDD1032 according to the eleventh embodiment of the present invention will be described. Also, in the eleventh embodiment, the transmission of data from AVHDD1032 will be described, and the transmitted data will be recorded on DVD1037 of DVD device1033.

FIG. 26 shows a block diagram of AVHDD 1032 and DVD device 1033 according to the eleventh embodiment of the present invention.

In addition, AVHDD 1032 according to the eleventh embodiment of the present invention is composed of storage means 1034 for storing data and transmission means 1035 for transmitting data stored in storage means 1034 to DVD device 1033 as shown in FIG. 26 .

The DVD apparatus 1033 of the 11th embodiment of the present invention is shown in Figure 26, by the 5th recording means 1036 that records the data from AVHDD1032 to DVD1037, the playback means 1038 that reproduces the data recorded in the 5th recording means 1036 constitutes. .

In addition, in the eleventh embodiment, AVHDD1032 is used as an example of the data transmission device of the present invention.

In addition, the connection between AVHDD 1032 and DVD device 1033 may be made through any interface.

Next, the operations of AVHDD 1032 and DVD device 1033 according to the eleventh embodiment of the present invention will be described.

Here, the data transmitted by AVHDD1032 is regarded as a data stream composed of several packets. The structure of a part of this data stream is shown in FIG. 27 . The data stream is a data stream composed of multiple blocks composed of five data packets D0, D1, D2, D3, and D4 as shown in Figure 27. D0, D1, D2, D3, and D4 are respectively gradually Larger sequential time-continuous data packets, that is, chain-encrypted data that cannot be replayed if the previous data in time is not replayed.

Therefore, when the data packets D0, D1, and D2 are taken out, the data packet D0 is followed by the data packet D1 in time, followed by the data packet D2. If the data packet D0 is not replayed, the data packet D1 cannot be replayed. If the data packet D1 is not replayed, the data packet D2 cannot be replayed.

Such a data stream is related to the operation when the AVHDD 1032 transmits the data stream to the DVD device 1033, and when the transmission means 1035 of the AVHDD 1032 transmits the data stream stored in the storage means 1034 to the DVD device 1033, the data of each block constituting the data stream Packets are sent in the order of D4, D3, D2, D1, D0.

In DVD device 1033 , fifth recording means 1036 records data from AVHDD 1032 on DVD 1037 .

When reproducing data recorded on DVD 1037, reproducing means 1038 reproduces data packets in the order of D0, D1, D2, D3, D4 for each block constituting the data stream, thereby reproducing the entire data stream.

In this way, since the data packets sent from AVHDD1032 to DVD device 1033 are sent in the order of D4, D3, D2, D1, and D0, even if the power supply is cut off due to a power failure or the like in the middle of data transmission, since D4 is not sent , D3, D2, D1, and D0, the block composed of D4, D3, D2, D1, and D0 is not played back, so even when the transmitted data leaks to other devices, it is possible to prevent the transmission from being interpreted by other devices. The condition of the data.

Again, in the above embodiment, the chain encryption of data packets D0, D1, D2, D3, D4 is not described in detail, here the data packets D0, D1, D2, D3, D4 of chain encryption can be stored in the AVHDD1032 In storage means 1034, AVHDD 1032 may also be provided with means for performing chain encryption, and when sending means 1035 of AVHDD 1032 is about to transmit a data stream, chain encryption is performed on the data packets of each block.

Also, in the above-mentioned embodiment, the data stream is composed of a plurality of blocks composed of five packets D0, D1, D2, D3, and D4, but the number of packets constituting each block is not limited to five. . Also, the data stream is not limited to being composed of a plurality of blocks. A data stream may be composed not of blocks but of packets. At this time, the transmitting means 1035 sequentially transmits the packets constituting the data stream from the last to the first.

Also, in the above-mentioned embodiment, the transmission of the data stream has been described, but in the case of the mobile data stream, if we look at the data packets D0, D1, D2, D3, and D4, we can see that the After the transmission of D2 and D1 is completed, data packets D1-D4 are deleted from the recording medium before moving, and after deletion is completed, data packet D0 is transmitted, and then data packet D0 is deleted from the recording medium before moving.

Also, in the above 8th to 11th embodiments, any AV data whose CCI value is copy prohibition, copy permission once, and recopy prohibition is collectively referred to as copy prohibition data, and in the following 12th to 11th embodiments In the sixteenth embodiment, copy-prohibited content such as AV data whose CCI is copy-prohibited is referred to as copy-prohibited content.

(12th embodiment)

Fig. 33 is a block diagram showing a recording and reproducing apparatus according to a twelfth embodiment of the present invention. As shown in the figure, the discriminant information detection means 2010 is a means for detecting discriminant information related to copy restriction from an external broadcast signal, and the time information acquisition means 2011 is to acquire a time signal related to time from an external broadcast signal The means used, the recording and playback means 2010 are means for recording and playback of broadcast signals from outside, and the recording medium 2013 is realized by a hard disk, etc., capable of recording and playback at the same time, and can be accessed randomly, and used for storing broadcast data. Means, control input interface (hereinafter referred to as control input I/F) 2015 is a means to receive control from the user, and switching means 2016 is to receive input from recording playback means 2012 and broadcast input from outside and select one of them to output to an external display etc. means. Also, in the recording medium 2013, the recording buffer 2014 is an area dedicated to recording data whose copying is restricted. In addition, the broadcast according to this embodiment is a digital broadcast using an MPEG transport stream or an MPEG program stream (hereinafter collectively referred to as an MPEG stream), and means for decoding processing and the like are omitted. Hereinafter, each embodiment is also the same. Furthermore, the discrimination information detecting means 2010, the time information acquiring means 2011, and the recording and reproducing means 2012 are examples of the recording means of the present invention.

Next, the operation of the recording and reproducing apparatus according to the twelfth embodiment of the present invention having the above-mentioned structure will be described.

First, the discrimination information detection means 2010 receives the input of the MPEG data stream from the outside, refers to the header or each data packet constituting the data string, detects copyright-related information such as copy protection or CCI (Copy Control Information, copy control information), and judges the input Whether the content is copy-prohibited or copy-restricted content. Here, assume a case where only copy-prohibited content is input.

Next, when it is judged that the input MPEG stream is copy-prohibited content, the discrimination information detecting means 2010 outputs the detection information to the recording and reproducing means 2012 . As examples of detection information, there are copyright information, copy protection, etc. included in the MPEG stream. When the recording and reproducing means 2012 receives the detection information, it prepares to record the MPEG stream in the recording buffer 2014 in the recording medium 2013 based on the information.

When an MPEG stream is input from the outside through the discrimination information detecting means 2010 , the recording and reproducing means 2012 records it in the recording buffer 2014 .

Next, the recording operation of the recording and reproducing means 2012 to the recording buffer 2014 will be described in detail. Fig. 34 is a timing chart for explaining the operation of the recording and reproducing apparatus according to the twelfth embodiment. As shown in the figure, as an example of the operation of this embodiment, the recording and reproducing device of this embodiment that temporarily records the data amount corresponding to 90 minutes of broadcasting time to the recording buffer 2014 is adopted, and the broadcast broadcast during the live broadcast period 2020 The copy-prohibited content with a duration of 120 minutes can be viewed by dubbing and replaying 90 minutes after the broadcast start time.

First, when the broadcast start time is reached, the recording/reproducing means 2012 starts recording the data constituting the reproduced still content in the recording buffer 2014 . After the broadcast start time, the recording and reproducing means 2012 continuously records data one by one in the recording buffer 2014 without reproducing it.

On the other hand, the time information acquiring means acquires time information such as PCR packets and time stamps from the MPEG stream, and starts measuring the recording time from the time when the recording and reproducing means 2012 starts recording the copy-prohibited content in the recording buffer 2014.

Next, from the broadcast start time, according to the measurement of the time information acquisition means 2011, when the recording period 2021 (90 minutes) passes through, the recording and playback means 2012 continues to record the MPEG data stream input from the outside one by one, and at the same time, from the recording buffer 2014 Data recorded after the start time of the broadcast will be deleted from above. However, in this operation example, since the time when the recording period 2021 has elapsed since the broadcast start time is the viewing start time when the viewing period 2024 by dubbing and reproducing starts, the recording and reproducing means 2012 is deleting the recorded data. Replay before and output to external monitor through switching means 2016.

That is, in the data recorded in the recording period 2021, the data corresponding to the first 30 minutes of the part 2022a (the content broadcast in the live broadcast period 2020a) after 90 minutes from the broadcast start time, is the same as the data reproduced by dubbing. The playback is performed at the same time as the viewing start time (the content viewed in the viewing period 2024a played back by dubbing), and deleted immediately thereafter.

Next, from the start time of viewing by dubbing and playback, when the recording and playback period 2022a passes, the recording and playback means 2012 continues to record data sequentially until the broadcast end time as the recording and playback period 2022b, while continuing to continuously read from The data section 2022a reproduces the data already stored in the recording buffer 2014.

Next, when the broadcast end time is reached, the recording/playback means 2012 stops the progressive recording of data, and plays back the data recorded in the buffer 2014 (playback period 2023) until the viewing end time.

Also, for the above-mentioned actions, the replayed data may be temporarily stored in the recording buffer 2014 during the recording and reproducing period 2022b and the reproducing period 2023, and deleted after the viewing end time has passed. On the other hand, when the power of the recording/reproducing apparatus is turned off, it is preferable to delete the data immediately after reproduction in order to prevent the data from being stored on the recording medium 2013 .

Also, when dubbing and playback are not performed even after the viewing start time has elapsed, the recording and playback means 2012 deletes all data recorded in the recording buffer 2014 . Accordingly, it is possible to prevent reproduction of the copy-prohibited content in a form other than dubbing.

Also, in the above description, when the discrimination information detecting means 2010 detects the discrimination information contained in the data of the copy-prohibited content, the recording and reproducing means 2012 automatically starts the recording operation for dubbing and reproducing. , and the recording operation of the recording and reproducing means 2012 may not be started based on the discrimination information, but may be performed based on control from the outside (user) side through the control input I/F 2015 .

In addition, in the above description, the end of the recording period 2021 is set to be the same time as the viewing start time by dubbing and reproducing, and the dubbing and reproducing operation of the copy-prohibited content is made with the data constituting the copy-prohibited content. The deletion operation is carried out in conjunction, but it is not limited to this. As shown in FIG. An arbitrary time can be set by control from the control input I/F 2015 , or it can be performed by a direct command given to the recording/reproducing means 2012 without setting the time. At this time, if there is no direct instruction for dubbing and playback to the recording and reproducing means 2012 within the recording period 2021, it is preferable that the recording and reproducing means 2012 stop the recording operation (period 2021a in FIG. 35). Also, at the same time, even when a direct command for dubbing and playback is executed again, it is preferable to set the state in which the command is not received.

In addition, in the above operation, it is explained that when the recording period 2021 elapses, the recording and reproducing means 2012 continues to record the MPEG data stream input from the outside one by one, and at the same time deletes from the recording buffer 2014 the data recorded after the broadcast start time. However, the data may be stored in the recording buffer 2014 after rewriting the data in a state where playback is not possible.

(13th Embodiment)

A recording and reproducing apparatus according to a thirteenth embodiment of the present invention employs a ring buffer as a recording buffer for recording copy-prohibited content.

Fig. 36 is a block diagram showing a recording and reproducing apparatus according to a thirteenth embodiment of the present invention. In this figure, the same reference numerals are used for the same or corresponding parts as those in FIG. 33 and descriptions thereof are omitted. Also, the ring buffer 2044 is a means for temporarily recording a certain amount of data by repeatedly performing overwrite recording in the same area.

The operation of the recording and reproducing apparatus according to the thirteenth embodiment of the present invention having the above-mentioned structure will be described below.

First, the operations in which the discrimination information detecting means 2010 refers to an external MPEG program stream and the recording and reproducing means 2012 record copy-prohibited content in the ring buffer 2044 are performed in the same manner as in the twelfth embodiment.

Next, the recording operation to the ring buffer 2044 by the recording/reproducing means 2012 will be described in detail. As described above, the ring buffer 2044 is a specific area on the recording medium 2013, and when a certain amount of data is recorded, it returns to the recording start position and overwrites. At this time, the size of the ring buffer 2044 can be set in advance, or it can be set based on the detection information obtained from the discrimination information detection means 2010, but in either case, the size of the ring buffer 2044 is set Because the duplication prohibition content which becomes the recording target cannot be recorded completely. For example, assuming that the broadcasting time of copy-prohibited content is 120 minutes, the ring buffer 2044 is set to have a capacity corresponding to 90 minutes.

With respect to the ring buffer 2044 set as described above, the recording/reproducing means 2012 starts recording the copy-prohibited content.

Here, Fig. 37 is a timing chart for explaining the operation of the recording and reproducing apparatus in the thirteenth embodiment. Hereinafter, the operations of the recording and reproducing means 2012 and the ring buffer 2044 in the thirteenth embodiment will be described in detail with reference to FIG. 37 . Furthermore, as shown in the figure, the setting of each time and each time in the operation example of this embodiment is the same as that of the twelfth embodiment shown in FIG. 34 .

First, when the broadcast start time is reached, the recording/reproducing means 2012 starts recording data constituting copy-prohibited content in the ring buffer 2044 . After the broadcast start time, the recording/playback means 2012 continues to record data sequentially in the ring buffer 2044 until the set capacity is full, and does not play back (recording period 2051).

Next, after the recording period 2051 from the broadcast start time, when the capacity set in the ring buffer 2044 is full, the recording and playback means 2012 is on the ring buffer 2044, so that the recording head (ring buffer pointer) starts from the recording period. The recording position at time 2051 is returned to the recording start position, and overwrite recording of new data is performed.

Also, in this operation example, since the end of the recording period 2051 is the same as the start time of the viewing period 2054 by dubbing and reproducing, the recording and reproducing means 2012 is overwriting and recording the MPEG data stream input from the outside. Simultaneously, the playback of the data recorded from the start time of the broadcast, just before rewriting, is started. That is, in the data recorded in the recording period 2051, the data corresponding to the first 30 minutes of the part 2052a (the content broadcast in the live broadcast period 2050a) after 90 minutes from the broadcast start time, and the viewing by dubbed playback start. Replay is performed at the same time at the same time, and deletion is performed by overwriting the recording.

Next, the recording/reproducing means 2012 continues the sequential recording of data until the end of the broadcast, and at the same time continues to reproduce the data (recording/reproducing period 2052b).

Next, when the broadcasting end time is reached, the recording/playback means 2012 stops overwriting recording of data, and plays back the data recorded in the ring buffer 2044 (playback period 2053) until the viewing end time.

Also, in the above-mentioned operation, the data reproduced from the ring buffer 2044 may also be temporarily stored in the ring buffer 2044, and deleted after the viewing end time passes, but in order to prevent the recording and reproducing device from being cut off due to an accident If the data is stored on the recording medium 2013 due to other reasons, it is preferable to delete it immediately after playback.

Also, when dubbing and playback are not performed even after the viewing start time has elapsed, the recording and playback means 2012 deletes all data recorded in the ring buffer 2044 . Accordingly, it is possible to prevent reproduction of the copy-prohibited content in a form other than dubbing.

In addition, in the above operation, it is described that the end of the recording period 2051 is set at the same time as the viewing start time by dubbing and playback, and the dubbing and playback operation of the copy-prohibited content is made with the data constituting the copy-prohibited content. However, it is not limited thereto. As shown in FIG. 38, as long as the viewing start time is within the recording period 2061 (period 2064c in which dubbing and playback can be set at any time), the The control from the control input I/F 2015 is set at an arbitrary time, and may be executed by a direct command to the recording/reproducing means 2012 without setting a time. At this time, when there is no direct command for dubbing and playback to the recording and reproducing means 2012 during the recording period 2061, it is preferable to stop the recording and reproducing means 2012 from the recording operation (period 2061a in the figure). Also, at the same time, it is preferable to set a state in which the direct command of dubbing and playback is not received even if the direct command of dubbing and playback is issued again.

In addition, in the above-mentioned operation, it is explained that when the recording period 2061 elapses, the recording and reproducing means 2012 continues recording the MPEG data stream input from the outside one by one and at the same time deletes the data recorded after the broadcast start time from the recording buffer 2014. , but it is also possible to rewrite the data and hold the data in the recording buffer 2014 in a state where playback is not possible.

Also, in the dubbing and playback of the present embodiment, with respect to the recording position on the ring buffer when reproducing data, (1) the reproduction position and the ring buffer in the state where overwrite recording is not performed on the ring buffer 2044 are (2) Make the playback position in the state of performing overwrite recording on the ring buffer 2044 after the position at the time of playback operation control (the position at which overwrite recording was last performed) . That is, in either of the above (1) and (2), the dubbing and playback are made to read sequentially from the oldest data recorded in the ring buffer 2044 . In the example shown in FIG. 38, the above (1) corresponds to the case where dubbing and playback are performed within the period 2064d (30 minutes after the broadcast start time), and the playback start position is usually uniquely determined as point A in the figure. The above (2) corresponds to the case where dubbing and playback are performed within the period 2064e (until 60 minutes after the elapse of 30 minutes from the broadcast start time), and the playback start position corresponds to the recording head (buffer pointer) of the ring buffer on the period 2064e the current location of .

(14th Embodiment)

A recording/reproducing apparatus according to a fourteenth embodiment of the present invention is capable of selectively dubbing and reproducing only copy-prohibited content when receiving a broadcast in which copy-prohibited content and dubable content are mixed.

Since the structure of this embodiment is the same as that of the twelfth embodiment, FIG. 33 will be referred to in the description. 39 is for explaining the operation of the recording and reproducing apparatus of this embodiment. Also, in this embodiment, the time available for dubbing is set to 120 minutes instead of 90 minutes as in the above-mentioned embodiment. Hereinafter, the operation of the embodiment of the present invention will be described with reference to FIG. 39 .

The MPEG data stream 2070 input from the outside is mixed with copy-prohibited content 2070a and 2070c, and normal content 2070b and 2070d that can be copied. The sequence of contents 2070d is input to the recording and reproducing apparatus. The discrimination information detecting means 2010 obtains the discrimination information included in each content and outputs it to the recording and reproducing means 2012 , and the time information obtaining means outputs the time information of each content to the recording and reproducing means 2012 . The recording and reproducing means 2012 having acquired the discrimination information and time information, based on these information, temporarily records the copy-prohibited content in the recording buffer 2014 and records the normal content in the recording medium 2013 every time the broadcast time of each content elapses. Recording area outside the recording buffer.

At this time, since the input of the content is in a time series order, as shown in Figure 39, in the recording buffer 2014, the copy prohibition content 2070a is first recorded, and then the copy prohibition content 2070c is recorded, and in the recording medium 2013, the content 2070b is first recorded , and then record the content 2070d.

As in the twelfth embodiment, the copy-prohibited contents 2070a and 2070c recorded in the recording buffer 2014 are sequentially dubbed and reproduced. After dubbing and playback is completed, the contents 2070b and 2070d recorded in the recording medium 2013 can be permanently retained by deleting data from the recording buffer 2014 or making playback impossible.

In addition, in the above description, this embodiment has been described for the case where it is implemented by the recording and reproducing apparatus having the structure of the twelfth embodiment, but it can also be performed in the same way in the case of the structure of the thirteenth embodiment. .

(Fifteenth Embodiment)

A recording/reproducing apparatus according to a fifteenth embodiment of the present invention encrypts data of temporarily recorded copy-prohibited content and renders it unviewable.

Fig. 40 is a diagram showing the configuration of data encryption means 2080 used in the recording and reproducing apparatus according to the fifteenth embodiment of the present invention. As shown in the figure, the recording buffer 2014 is the same means as the recording buffer of the twelfth embodiment, the encryption means 2081 is a means for encrypting the data input from the recording and playback means 2012 with a time-varying key, and the decoding means 2082 is Means for decrypting the encrypted data output from the recording buffer 2014, the time-varying key generating means 2083 means for generating the time-varying key used in the encrypting means 2081 and the decrypting means 2082, and the key buffer 2084 temporarily stores means of time-varying keys.

Hereinafter, the operation of the present embodiment having the above-mentioned structure will be described. When data is input from the recording and reproducing means 2012 to the encryption means 2081, the encryption means 2081 encrypts the original data based on the time-varying key generated by the time-varying key generating means 2083. The encrypted data is recorded into the record buffer 2014 .

On the other hand, the time-varying key generating means 83 outputs the same time-varying key as that obtained by the encrypting means 2081 to the key buffer 2084 and stores it in the key buffer 2084 .

Next, when the recording and reproducing means 2012 performs dubbing and reproducing, and outputs the encrypted data from the recording buffer to the decrypting means 2082, the decrypting means obtains data necessary for data decryption from the key buffer 2084, and processes the data. decrypt.

In the above-mentioned operation, the key buffer temporarily storing the time-varying key disappears when the time period equal to the data capacity of the recording buffer 2014 is exceeded. As a result, the data that has not been dubbed and played back is retained in the recording buffer 2014 in an encrypted state, and even if it can be played back, it cannot be viewed.

In order to delete the time-varying key, for example, the key buffer 2084 can be made into a ring buffer structure, and the key stored in the key buffer is usually overwritten by a new key. The capacity of the ring buffer is, for example, set to be the same as the recording period 2021 in the operation example of the twelfth embodiment shown in FIG. 34 .

In addition, a timer may be provided separately to measure time, and when a predetermined time elapses, keys after the set time may be sequentially deleted from the key buffer 2084 .

Also, when the key buffer 2084 is constituted by a volatile memory, all the keys in the key buffer are deleted when the power of the recording/reproducing apparatus is turned off, thereby ensuring secrecy.

(16th Embodiment)

The recording and reproducing apparatus according to the sixteenth embodiment of the present invention is capable of notifying the user of the time of dubbing and reproducing.

Fig. 41 is a block diagram of a recording and reproducing apparatus according to a sixteenth embodiment of the present invention. In this figure, the same symbols are used for the same parts as those in FIG. 33 or corresponding parts, and descriptions thereof are omitted. Also, the notifying means 2091 is a means for notifying the operating state of the recording/reproducing apparatus by voice, image or text information.

42 is for explaining the operation of the recording and reproducing apparatus of this embodiment. The operation of the recording and reproducing apparatus according to the sixteenth embodiment of the present invention having the above-mentioned structure will be described below. In addition, the capacity set in the recording buffer 2014 is the same as that of the twelfth embodiment, that is, the capacity corresponding to 90 minutes of broadcasting time. The description of other operations that overlap with the twelfth embodiment will be omitted, and only the differences will be described.

First, a user watches a copy-prohibited content broadcast from a broadcasting station through a live broadcast. Next, a case where viewing is temporarily interrupted for some reason at time t will be considered. At this time, the user makes an input through the control input I/F 2015 to activate the recording/reproducing means 2012 . The recording and reproducing means 2012 starts recording the copy-prohibited content in the recording buffer 2014 from the time when the input from the control input I/F 2015 is received (same as the time t1). On the other hand, during this period, the recording/reproducing apparatus is in a "pause" state.

In the recording buffer 2014, similar to the operation of the twelfth embodiment, the data of the copy-prohibited content is continuously recorded, and at time t2, an alarm sound is issued to the user to urge the user to pay attention to the control of the recording and reproducing apparatus. In this embodiment, the time t2 is set as the remaining amount (broadcast time unit) until the set capacity is reached among the data recorded by the recording/playback means 2012 in the recording buffer 2014 from the time t1. In the embodiment, this time t2 is set to 5 minutes (in units of broadcast time). Therefore, time t2 is specifically (recording start (pause start) time + 85 minutes (data amount of copy-prohibited content temporarily recorded in the recording buffer - 5 minutes)).

With the notification from the notification means 2091, the user inputs from the control input I/F 2015 to cancel the pause, and restarts viewing of copy-prohibited content. The difference from before the suspension is that the copy-prohibited content viewed by the user is not a live broadcast from a broadcasting station but a content dubbed and reproduced from the recording buffer 2014 .

At this time, since there is a pause between time t2 and time t1, the end time t6 of the user's viewing of the program is delayed by the time (t2-t1) from the actual broadcast end time t4.

Also, if dubbing and playback are performed from time t2 during this operation, while the program is being broadcast from the broadcasting station, although the playback of the content temporarily recorded in the recording buffer 2014 is completed, the playback will be completed from the playback end time t7. Until the program viewing end time t6, data is recorded and reproduced in the recording buffer 2014, and at the same time, the reproduced program data is stored in a state where viewing cannot be performed or deleted.

On the other hand, if there is no input from the user to the control input I/F 2015 even after the time t2, the recording buffer 2014 stops recording the data for the set time at the time t3 when the data for the set time is completely recorded. The temporary recording operation is performed, and at the same time, dubbing playback is forcibly started. In this embodiment, the time t3 after 5 minutes has elapsed since the time t2 when the notification means 2091 notified corresponds to this time. In this operation, starting from time t3, the program is dubbed and replayed only after the difference between the time t1 when the pause starts, and the time t5 when the user finishes watching the program is delayed by the above-mentioned (t3-t1) from the actual broadcast end time t4. part. Also, the portion (t3-t1) is the same as the time to start recording the copy-prohibited content set in the recording buffer 2014 . Furthermore, broadcasts after time t3 are no longer recorded in the recording buffer 2014 . Therefore, during the period from the end time t8 of forced dubbing and playback to the end time t5 of program viewing, the user watches other programs broadcast after the broadcast program has ended, or the end time t8 of dubbing and playback is still the user's viewing time.

That is, if dubbing playback is not input from the user even after time t2, and once dubbing playback is forcibly started, the user cannot completely watch the program that was started before the suspension after the suspension is canceled.

As described above, according to the present embodiment, the user can set the dubbing and playback of the copy-prohibited content at the desired time, and at the same time, in order to protect the copyright of the copy-prohibited content, the user can be urged to complete the dubbing and playback until the specified time elapses. until.

In addition, in the above-mentioned embodiment, an example using the recording buffer 2014 was described, but the ring buffer 2044 of the thirteenth embodiment can be used instead of the recording buffer 2014 to obtain the same effect. The operation when the ring buffer 2044 is used is shown by the dotted line in FIG. 42. During the period from time t4 to t3, in the ring buffer, that is, the recording buffer, data rewrite recording is continued, and at the same time rewriting is performed. playback, thereby enabling dubbing and playback for the time portion set in the buffer. Here, it is set so that the operation when the rewriting operation is prohibited at time t3 is the same as the operation when the above-mentioned normal recording buffer forcibly executes dubbing and playback.

In addition, the configuration of this embodiment may be a configuration combined with that of the above-mentioned fourteenth embodiment.

Furthermore, in each of the above-mentioned embodiments, the recording and reproducing means in which the recording device and reproducing means of the present invention are integrated are described for recording and reproducing in the recording buffer, but the structure of the present invention does not The present invention is not limited to this, and only recording means for recording may be provided, and means for reproducing data from the recording buffer 2014 or the ring buffer 2044 may be separately provided as an external device.

Furthermore, in each of the above-mentioned embodiments, the recording period of the copy-prohibited content is measured as time information by counting PCR packets in the MPEG stream of the content, but the time information is not limited thereto. Other time information may also be measured by using EPG, and referring to the acquired EPG to perform absolute time measurement with a timer provided separately.

Note that the time information may also be measured by the recording medium 2013 .

Note that this time information may be measured in a device such as STB that inputs the MPEG stream to the recording/reproducing apparatus according to the embodiment of the present invention, and may be input simultaneously with the MPEG stream. It should be noted that the time information may include the broadcast start time of the content to be temporarily recorded, and the like.

Furthermore, in each of the above-mentioned embodiments, it has been described that the copy-prohibited content is composed of data that is not allowed to be copied even once, but the copy-limited content of the present invention is not limited to this, and it is also possible to use only Contents formed of data that is permitted to be copied once are targeted. In any case, the present invention can be applied to data to which copy prohibition or regulatory restrictions are attached.

In addition, in the description of the present invention, an invention concerning a reproducing device is also described, which is characterized in that it is provided with: control for reproducing the encrypted data recorded on the disc by the above-mentioned recording device of the present invention. means; playback means for controlling and playing back the data by the control means; and decryption means for decrypting the played back data and sending them to the interface, the control means controls the recording means so that the The recording means reproduces the copy permission information, the decryption means generates first information including at least one of the device unique key and the copy permission information, and the decryption means uses the recording unit information to generate the The decrypted information of the first information is a content key, and the decryption means decrypts the data using the content key.

Moreover, in the specification of the present invention, there is also described an invention related to a reproducing device, which is characterized in that it is provided with: control for reproducing the encrypted data recorded on the disc by the recording device of the present invention described above. means; playback means for controlling and playing back the data by the control means; and decryption means for decrypting the played back data and sending them to the interface, the control means controls the recording means so that the The recording means reproduces the encrypted title key, and the decrypting means decrypts the encrypted title key using the device unique key.

Furthermore, in the specification of the present invention, an invention concerning a reproducing device is also described, which is characterized in that it includes: a device for controlling to reproduce the encrypted data recorded on the disc by the above-mentioned recording device of the present invention. control means; reproduction means for controlling and reproducing the data by the control means; and decryption means for decrypting the reproduced data and sending it to an interface, the decryption means converting the Data decryption.

Furthermore, in the specification of the present invention, an invention concerning a reproducing device is also described, which is characterized in that it includes: a device for controlling to reproduce the encrypted data recorded on the disc by the above-mentioned recording device of the present invention. control means; replay means for replaying the data controlled by the control means; and decryption means for decrypting the replayed data and sending it to the interface, the control means controls the recording means so that all The recording means replays the encrypted title key, the decryption means decrypts the replayed title key using the device unique key, and the decryption means generates a first 3 information, the decryption means generates the content key which is the information after decrypting the third information by using the recording unit information, the recording unit information is the recording unit which is the smallest unit for the control means to continuously access the recording means The serial number and/or mark inherent in the record block of the premise that the decryption means decrypts the data using the content key.

Furthermore, in the specification of the present invention, an invention concerning a reproducing device is also described, which is characterized in that it includes: a device for controlling to reproduce the encrypted data recorded on the disc by the above-mentioned recording device of the present invention. control means; replay means for replaying the data controlled by the control means; and decryption means for decrypting the replayed data and sending it to an interface, the decryption means converting the Data decryption.

Furthermore, in the specification of the present invention, an invention concerning a reproducing device is also described, which is characterized in that it includes: a device for controlling to reproduce the encrypted data recorded on the disc by the above-mentioned recording device of the present invention. control means; replay means for replaying the data controlled by the control means; and decryption means for decrypting the replayed data and sending it to the interface, the control means controls the recording means so that all The recording means replays the encrypted title key, the decryption means decrypts the replayed title key using the device unique key, and the control means controls the recording means so that the The recording means reproduces the copy permission information, the decryption means generates second information including at least one of the title key and the copy permission information, and the decryption means generates the second information using the recording unit information. The information after information decryption is the content key, and the recording unit information is a serial number and/or mark inherent in a recording block on the premise that the recording unit, which is the smallest unit for the control means to continuously access the recording means, the decryption means The data is decrypted using the content key.

Furthermore, in the specification of the present invention, an invention concerning a reproducing device is also described, which is characterized in that it includes: a device for controlling to reproduce the encrypted data recorded on the disc by the above-mentioned recording device of the present invention. control means; replay means for replaying the data controlled by the control means; and decryption means for decrypting the replayed data and sending it to the interface, the control means controls the recording means so that all The recording means reproduces the copy permission information, and the decryption means decrypts the data using the reproduced copy permission information.

Also, in this specification, an invention about a medium is also described, which is a medium equipped with a program and/or data for realizing all or a part of the functions of all or a part of the means of the present invention described above through a computer, and can be controlled by the computer. The read program and/or data can be read in conjunction with the computer to execute the function.

Also, in this specification, an invention about an information aggregate is described, which is a program and/or data that realizes all or part of the functions of all or part of the means of the present invention described above using a computer, and is readable and readable by a computer. The retrieved program and/or data can execute the function together with the computer.

Furthermore, the so-called data includes data structure, data format, data type, and the like.

The medium includes recording media such as ROM, transmission media such as a network, and transmission media such as optical, electric, and acoustic waves.

In addition, the storage medium includes, for example, a recording medium on which a program and/or data is recorded, a transmission medium on which a program and/or data is transmitted, and the like.

Furthermore, the term "processable by a computer" includes the following cases. For example, in the case of a recording medium such as a ROM, it can be read by a computer, and in the case of a transmission medium, it can be obtained by a computer as a transmission result. The program and/or data of the transfer object.

In addition, the term "information aggregate" means, for example, an aggregate of software including programs and/or data.

Furthermore, as described above, the configuration of the present invention can be realized by software or by hardware.

Industrial availability

As can be seen from the above description, the present invention can provide a recording device and a playback device capable of protecting copyright when recording data requiring copyright protection and/or when reproducing data requiring copyright protection.

In addition, the present invention can provide a data processing device capable of moving or duplicating data prohibited from copying to another recording medium while protecting copyright, recording data from other data processing devices on a recording medium or reproducing data while recording. The recording and playback device for playback, the encrypted data decryption recording device system that protects copyright and backs up data in advance, and the decryption recording device that constitutes the system, the recording device, and the data transmission device that protects copyright and transmits data.

Furthermore, the present invention can provide a recording device and a recording/reproducing device that enable copying-prohibited broadcast programs to be dubbed and reproduced without copyright infringement.

Claims (20)

1. a pen recorder is characterized in that,

This pen recorder is to forbid or to limit the pen recorder that the copy limit content that data constituted of duplicating is transcribed playback usefulness with being set at,

Possess: can the recording prescribed capacity recording medium of described copy limit content of part; With the recording means of data recording to described recording medium,

Described recording means is when arriving described recording medium with described copy limit content record, from the described copy limit content of opening entry, through after the stipulated time, make the data that are recorded in the described copy limit content in the described recording medium be state that can not rating.

2. pen recorder as claimed in claim 1 is characterized in that,

Realize described state that can not rating by the data of leaving out described copy limit content.

3. pen recorder as claimed in claim 1 is characterized in that,

Realize described state that can not rating by the data of not leaving out described copy limit content.

4. pen recorder as claimed in claim 1 is characterized in that,

Can not reset by the data that make described copy limit content and to realize described state that can not rating.

5. pen recorder as claimed in claim 4 is characterized in that,

Data encryption by the described copy limit content after will resetting realize can not rating state.

6. pen recorder as claimed in claim 1 is characterized in that,

By the discriminant information of being correlated with, determine the moment of the described copy limit content of described recording means opening entry with reference to described copy limit content.

7. pen recorder as claimed in claim 6 is characterized in that,

Described recording means adopts discriminant information to write down described copy limit content and other guide respectively.

8. pen recorder as claimed in claim 6 is characterized in that,

Described discriminant information is included in the literary property information in the serial data of described copy limit content.

9. pen recorder as claimed in claim 1 is characterized in that,

According to input, determine the moment of the described copy limit content of described recording means opening entry from the outside.

10. pen recorder as claimed in claim 1 is characterized in that,

Described recording medium has the record buffer that is used for the described copy limit content of placeholder record.

11. pen recorder as claimed in claim 10 is characterized in that,

Described record impact damper is the circular buffer that can write down a certain amount of data by carrying out regenerative recording repeatedly on the same area.

12. a device for reproducing recorded is characterized in that,

Possess: the described pen recorder of claim 1; The playback means of the data of playback of recorded in described recording medium,

Described playback means are passed through from the moment of the described copy limit content of opening entry after the regulation stand-by time, the described copy limit content of playback of recorded.

13. a device for reproducing recorded is characterized in that,

Possess: the described pen recorder of claim 11; The playback means of the data of playback of recorded in described recording medium,

Described playback means are passed through from the moment of the described copy limit content of opening entry after the regulation stand-by time, the described copy limit content of playback of recorded.

14. device for reproducing recorded as claimed in claim 13 is characterized in that,

Carrying out to described circular buffer under the state of regenerative recording, when described playback means are reset action, on described circular buffer, beginning to carry out the playback of these data from the position of writing down data the earliest.

15. device for reproducing recorded as claimed in claim 14 is characterized in that,

Carrying out to described circular buffer under the state of regenerative recording, when described playback means were reset action, the record start position from described circular buffer carried out the playback of these data.

16. as claim 12 or 13 described device for reproducing recorded, it is characterized in that,

Described pen recorder stops the operation of recording of this copy limit content when the copy limit content that do not have playback of recorded in described recording medium in described regulation stand-by time.

17. as claim 12 or 13 described device for reproducing recorded, it is characterized in that,

Also possess the means of informing of informing the movement content of described pen recorder or playback means according to any amount in the stand-by time of described stipulated time or described regulation in advance.

18. pen recorder as claimed in claim 1 is characterized in that,

Described recording means can be measured the temporal information that comprises the described stipulated time.

19. pen recorder as claimed in claim 1 is characterized in that,

Described copy limit content comprises temporal information, and this temporal information comprises the described stipulated time.

20. pen recorder as claimed in claim 1 is characterized in that,

With described copy limit content mutually independently, obtain the temporal information that comprises the described stipulated time from the outside.

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