JPH11306546A - Optical recording medium and recording medium reproducing apparatus - Google Patents

Abstract

(57) [Summary] To copy data recorded on a recording medium such as an optical disk to a limited number of times. SOLUTION: When data recorded on a recording medium D1 is reproduced to determine predetermined data, control for permitting copying to another recording medium is performed a predetermined number of times during reproduction of software recorded on the recording medium. and a control unit 17 for performing only, and a recording track rupturing means 12 for destroying the recording spot t ₁ of the predetermined data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical recording medium such as an optical disk and a reproducing apparatus for reproducing the recording medium such as the optical recording medium, and more particularly, to unauthorized copying of data recorded on the recording medium such as an optical recording medium. Prevention technology.

[0002]

2. Description of the Related Art Various reproducing apparatuses using optical disks have been put to practical use. For example, binary data (digital data of 1 or 0) modulated by a predetermined method is recorded by forming pits on a signal recording surface of a disk, and the presence or absence of the pits is recorded on the signal recording surface of the disk during reproduction. There is an apparatus in which detection is performed from the return light of the irradiated laser light and processing for reproducing recorded binary data is performed. Such optical discs include, for example, a CD (compact disc) for recording package programs such as digital audio data and various program data, and a DVD (digital) for recording package programs such as digital video data and various program data. Video disks or digital versarity disks) have been put to practical use.

[0003]

Since the data recorded on this type of optical disk is digital data, the data reproduced from the optical disk can be used as it is on other recording media (optical disk, magneto-optical disk, magnetic tape, etc.). ), It is possible to make a copy of the data with little deterioration in the data. For this reason, if unlimited copying is permitted, there is a problem in protecting the copyright and the like of the program recorded on the optical disk. Usually, some copy protection processing is performed. For example, a serial copy management system (SCMS) has been put to practical use in which some code is recorded on the copied program side each time digital copying is performed once, and the number of generations that can be digitally copied is limited to a predetermined number.
There is also a system that employs a method of performing some processing on data reproduced and output from a reproducing apparatus from an optical disk or the like so that when the data is copied, the data cannot be normally recorded.

Here, the serial copy management system is a system that limits the number of generations that can be digitally copied. Therefore, it is not a system that basically limits the number of copies that can be copied, but a situation where a large number of copied programs are generated. Cannot be prevented. That is,
When copying is restricted by the serial copy management system, for example, only one generation is permitted to copy and 2
The system does not allow copying after the next generation. Copying from the parent recording medium (disk) to the child recording medium is not restricted, only copying from the copied child recording medium to the grandchild recording medium is restricted. Is what is done. Therefore,
If you have a parent disc, you can make any number of copied discs without limiting the number of copies. For example, when an optical disk on which audio data, video data, and the like are recorded is rented to an unspecified number of people, anyone who borrows the disk can copy.

[0005] In addition, data output from the playback device includes:
When performing processing that cannot be copied, basically copying is always restricted. Therefore, if it is desired to permit copying a limited number of times, such as one or two times, it is applicable. Can not.

SUMMARY OF THE INVENTION In view of the foregoing, it is an object of the present invention to allow copying from an optical recording medium to be limited to a limited number of times.

[0007]

According to an aspect of the present invention, there is provided an optical recording medium in which at least a predetermined data recording area is destroyed by irradiating the optical recording medium with a predetermined laser beam. It is what was constituted.

[0008] According to the optical recording medium having such a configuration, it is possible to perform copy prohibition processing depending on the data destruction state of the predetermined data recording area.

Further, the recording medium reproducing apparatus of the present invention reproduces data recorded on a recording medium and determines predetermined data. When reproducing software recorded on the recording medium, it reproduces the data on another recording medium. It is provided with control means for performing control for permitting copying only a predetermined number of times, and recording track destroying means for destroying a recording location of predetermined data.

According to the recording medium reproducing apparatus having such a configuration,
Only when predetermined data is correctly recorded on the recording medium, copying is permitted a predetermined number of times, and the recording location of the predetermined data is destroyed. Will not be able to copy using the playback device.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described.
This will be described with reference to the accompanying drawings.

In this embodiment, an optical disk reproducing apparatus 1
The recording apparatus 20 performs a process of recording the data reproduced by the recording apparatus 20 on a predetermined recording medium. FIG. 1 is a diagram showing the configuration of the reproducing apparatus 10 and the recording apparatus 20.

First, the structure of the optical disc D1 reproduced by the reproducing apparatus 10 of the present embodiment will be described. As the optical disc D1, a track is formed by forming pits or equivalents on a signal recording surface, and the track is formed on this track. By irradiating the laser beam, the data recording state is detected on the reproducing apparatus side, and reproduced data is obtained.

The optical disc D1 reproduced by the reproducing apparatus 10 of the present embodiment is recorded on the optical disc D1 in an area where control information such as a lead-in area, which is an area reproduced first during reproduction, is recorded. ISRC (Internationa) which is an identification code assigned to each software
l Standard Recording Code) data, and copy information is also recorded if necessary. This copy information is information for restricting copying of software recorded on this disc. For example, information such as how many times copying is permitted or no copying is permitted. Here, it is assumed that copy information is recorded in tracks t ₁ of the lead-in area. The copy information is encrypted and recorded by a predetermined method, for example.

In this case, when at least the track t ₁ is irradiated with a laser beam having a power several times the reproducing power on the signal recording surface, the track is destroyed and the data recorded at that position is read. It is made of a material that cannot be put out. The entire disc may be made of such a material.

As the optical disk D1 having such characteristics, for example, a data recording track is formed by using a predetermined dye, as is practically used in a writable optical disk such as a CD-R. Is possible. Further, it may be formed by another method.

The data recorded on the optical disk D1 of this embodiment is recorded by superimposing data such as encrypted copy information by a special modulation process called a so-called digital watermarking technique. Is also good.

Next, the optical disk D thus configured
1 will be described. The optical disc D1 mounted on the reproducing device 10 is driven to rotate by the spindle motor 11. The rotation speed at the time of this rotation drive is determined by the control unit
In addition to spindle servo control at a normal speed (constant linear speed or constant angular speed), spindle servo control is performed at a rotation speed that is a fraction of the normal speed when a recording track is destroyed, which will be described later.

An optical pickup 12 is provided on the signal recording surface of the optical disc D1 rotated and driven by the spindle motor 11.
The reproduction laser light from the optical disc 12 is irradiated, the return light of the irradiated laser light is detected in the optical pickup 12, and the data recorded on the disk D1 is reproduced from the detected state. The optical pickup 12 reproduces data of a track at a predetermined radial position on the disk D1 under the control of the control unit 17.

The reproduction signal detected by the optical pickup 12 is supplied to a data demodulation unit 13 for demodulation, and the demodulated data is supplied to a reproduction data processing unit 14.
Reproduction processing such as error correction is performed, and the processed reproduction data is output from the output terminal 15. Further, after demodulating control data recorded on a predetermined track of the optical disc D1 (for example, a track in a lead-in area which is first reproduced at the time of disc reproduction) by the data demodulation unit 13, the copy information detection unit 16 and the control unit 17 To supply. The copy information detector 16 detects copy information included in the control data, and supplies the detected copy information to the controller 17. In addition to the copy information, the control unit 17 determines ISRC, which is an identification code assigned to each piece of software recorded on each optical disc.

The control unit 17 stores the determined identification code (I
SRC) and a memory 19 for storing copy information and the like. The memory 19 is configured to use, for example, a non-volatile memory so that stored data is not lost.

The reproducing apparatus 10 has a terminal 18 for transmitting control data to and from the recording apparatus 20. Control data output from the control unit 17 is supplied from the terminal 18 to the recording apparatus 20. In addition, control data input from the recording device 20 is supplied from the terminal 18 to the control unit 17.

Next, the configuration of the recording device 20 will be described. The reproduction data output from the output terminal 15 of the reproduction device 10 is supplied from the input terminal 21 to the recording data processing section 22 to perform data processing for recording. After that, the data modulation unit 2
3 for modulation processing for recording. Then, the signal modulated by the data modulating unit 23 is supplied to the optical pickup 24, and the recording laser light emitted from the optical pickup 24 to the disk D2 is modulated by a recording signal to record data on the disk D2. The processing in the recording data processing unit 22, the data modulation unit 23, and the optical pickup 24 is executed under the control of the control unit 25 of the recording apparatus 20, and the control unit 25 performs servo control on the spindle motor 26 that drives the disk D2 to rotate. Controlled.

The configuration of the recording device 20 described here is an example in the case where an optical disk writable by laser light is used as a recording medium, and the configuration is different when another recording medium is used. For example, when a magneto-optical disk is used as a recording medium, a magnetic head that modulates a magnetic field with a recording signal is required in addition to an optical pickup that irradiates the disk with laser light. Further, the recording apparatus may be configured as a recording apparatus using a recording medium (such as a magnetic tape) other than a disk.

Next, the processing for reproducing the optical disk mounted on the reproducing apparatus 10 of the present embodiment and the processing for recording the reproduced data in the recording apparatus 20 will be described with reference to the flowcharts of FIGS. It will be described with reference to FIG.

First, when playing back the optical disk D1 mounted on the playback apparatus 10, the registration process of the copy information shown in the flowchart of FIG. That is, the disc D mounted on the reproducing apparatus 10
When one of the playback operation is performed (step 101) reproduces the copy information recorded on a predetermined track t ₁ of the disk D1, whether or not detection of the reproduced copy information in the copy information detecting unit 16 Judgment (Step 10
2). Here, when it is determined that the copy information cannot be detected, the registration processing of the copy information ends.

If the copy information is detected in step 102, the decryption processing of this copy information is performed in the control unit 17 (step 103: if encrypted), and the decrypted copy information is copied. It is determined whether or not the information indicates that permission is granted (step 10).
4). Here, if the information does not permit copying at all, the copy information registration process ends.

If it is determined in step 104 that the information is information permitting copying, the copy information is stored together with the software identification code (ISRC) in the memory 19 connected to the control unit 17 (step 10).
5). The after storage processing of the copy information, it performs a process of destroying the recording tracks t ₁ of the copy information of the optical disk D1 (step 106).

When performing the process of destroying the recording track t ₁ of the copy information, the control unit 17 sends a command to the spindle motor 11 to reduce the rotational speed of the disk D1 to a fraction of the normal speed. on which it is set the low speed of the speed, irradiating a laser beam power for reproduction to the track t ₁ corresponding from the optical pickup 12. By such processing, an amount corresponding rotational speed of the disk is low, the laser beam irradiated to the tracks t ₁ of the disc, consequently it becomes strong power, data recorded on the track t ₁ is broken Te, becomes the data recorded on the tracks t ₁ to the state thereafter does not read. That is, for example, when a data recording track on the signal recording surface is formed by using a dye as the disk D1, the change in the dye is effected by the integrated value of the irradiation of the laser beam.
The power of the laser light applied to the disk is relatively increased, and the state is the same as that of irradiating the laser light of the power for recording, and the data recorded on the track can be destroyed. .

Here, the recording data is destroyed by setting the rotation speed of the disk to a fraction, but the recording data is destroyed by irradiating a laser beam while the rotation of the disk is stopped. Alternatively, the recorded data may not be read out by a method such as scratching the disk surface in any way.

Next, the reproducing apparatus 10 and the recording apparatus 20 of this embodiment
And the data reproduced from the optical disk D1 by the reproducing device 10 is transferred to the disk D mounted on the recording device 20.
2 is described with reference to the flowchart of FIG.

When this copy operation is performed, first, the control unit 17 of the reproducing apparatus 10 reproduces the disk D1 (step 111) and detects the identification code (ISRC) recorded on the disk D1 (step 112). ).
Then, it is determined whether or not the detected identification code matches the identification code stored in the memory 19 of the playback device 10 (step 113).

Here, when the identification code matches the code stored in the memory 19, the copy information stored in the memory 19 together with the identification data is determined to determine how many times the information is permitted to be copied. If the information is information that permits copying one or more times, the reproduction data processing unit 14 issues a command to permit the signal reproduced from the disc D1 to be sent from the reproduction data processing unit 14 to the recording device 20 via the output terminal 15. (Step 114).

If the identification code detected in step 113 is not stored in the memory 19, or even if the identification code is stored, the copy information stored together with the identification code does not permit copying at all. If it is indicated, a process that does not permit copying is performed. As the process of not permitting copying, for example, control data indicating that copying is not permitted is sent to the control unit 25 of the recording device 20 side.

After permitting the reproduction data to be sent in step 114, the control unit 17 determines whether or not the reproduction data contains information for prohibiting copying by digital watermarking processing on the disc (step 115). If there is information that prohibits copying, processing is performed to prohibit copying.

If the copy prohibition information is not detected in the digital watermarking process (or the digitally watermarked data cannot be detected), the control unit 17 of the reproducing apparatus 10
Sends a control command to the control unit 25 of the recording device 20 to start the recording operation.
Is recorded on the digital D2 (step 116). Then, the control unit 1 of the playback device 10
In step 7, a process is performed in which a copy history is added to the copy information of the corresponding disk stored in the memory 19 and stored (step 117).

As a specific example of the copy history, for example, when the original copy information indicates that the copy is permitted only once, when the copy processing is performed as shown in this flowchart, there is one copy history. Is added. By adding the copy history information in this manner, it functions in the same manner as copy information for which copying is not permitted thereafter (or information in which the number of times of permitting copying is reduced).

By performing the processing as described above, the reproduction apparatus 1
0, when the disc D1 is reproduced for the first time, the copy information recorded on the optical disc D1 is read, the recording area of the read copy information is destroyed, and thereafter the copy information cannot be read from the disc. become. When copying is performed, control to permit copying is performed based on the copy information read and stored in the playback device 10, and appropriate copy control can be performed based on the copy information.
For this reason, only copying up to the number of times indicated by the copy information is permitted, so that a large number of copies of the data recorded on the disk D1 are not created, and compared with a conventional serial copy management system or the like. Number can be reliably limited. Further, for example, even if an attempt is made to reproduce and copy by a reproducing apparatus other than the reproducing apparatus 10, the reproducing apparatus cannot read the copy information, and the copying is not permitted. Has the effect of limiting the

In the embodiment described above, when copying is permitted, the recording device 20 connected to the reproducing device 10
Although the signal for permitting the recording is sent to the side, the reproduction signal itself may be processed to perform the copy permission process. That is, for example, when copying is not permitted, the reproduction data output from the reproduction data processing unit 14 is subjected to some processing so that when the data is recorded on another recording medium, the data is disturbed and the copying is permitted. Only at that time, the data processing in the reproduction data processing unit may be canceled to prevent data from being disturbed during recording. Conventionally known various processes can be applied to the control process of permitting or prohibiting the copying.

In the copying process described with reference to the flowchart of FIG. 3, the reproducing apparatus 10 reproduces data at a transfer rate higher than normal, such as at least double speed, and reproduces the data at the higher transfer rate. It may be applied only when data is recorded by the recording device 20. By doing so, the copy protection functions effectively only at the time of so-called high-speed copying in which copying can be easily performed in a short time. In this case, when the reproducing device 10 and the recording device 20 are integrally configured, copying can be performed properly without the need to connect two devices, and illegal copy prevention functions effectively.

In the above embodiment, the specific signal format and the like of the optical disc to be reproduced by the reproducing apparatus have not been particularly described, but the present invention can be applied to optical discs of various formats which exist conventionally. For example, it can be applied to a disc such as a CD (compact disc) for recording digital audio data and various program data and a DVD (digital video disc or digital versatility disc) for recording digital video data and various program data. is there.

In the above-described embodiment, when a condition for permitting copying is to be charged by any method, the process of charging may be performed at the same time.

[0043]

According to the optical recording medium of the present invention, for example, by recording data permitted to be copied in a predetermined data recording area, the data is copied only when the data permitted to be copied can be reproduced. Is permitted, and after the recording area of the data permitted to be copied is destroyed, it is limited to a state where copying is not allowed at all, and the copy prohibiting process can be efficiently performed.

According to the optical recording medium of the second aspect,
According to the first aspect of the present invention, since the predetermined data is data relating to copy restriction, the copy prohibition process functions effectively.

According to the recording medium reproducing apparatus of the third aspect, only when the predetermined data is correctly recorded on the recording medium, copying is permitted a predetermined number of times, and the recording location of the predetermined data is destroyed. Therefore, copying exceeding a predetermined number of times in this apparatus and copying using another reproducing apparatus cannot be performed, and a reliable copy prohibition process in which the number of times of copying is limited can be realized.

According to the recording medium reproducing apparatus of the fourth aspect, in the invention of the third aspect, when the control for permitting the copy is performed, the fact that the control for permitting the copy has been performed is specified by the software. Provided with a memory for storing the identification code, the number of copies can be reliably limited based on the data stored in the memory.

According to the recording medium reproducing apparatus described in claim 5, in the invention described in claim 3, as the recording track destroying means, the reproducing means controls the irradiation of the recording medium with the reproducing laser beam. Means for controlling the drive state of the recording medium to a state different from that during normal playback, so that the recording track can be destroyed using a playback laser beam with a relatively low output. And the recording track can be destroyed with a simple structure.

According to the recording medium reproducing apparatus described in claim 6, in the invention described in claim 3, the data recorded on the optical recording medium by the reproducing means is reproduced at a speed at least twice or more the normal reproducing speed. Only when this is done, the control means performs the output processing of the signal for permitting the copy based on the discrimination of the data discrimination means, so that the copy restriction processing functions effectively at the time of so-called high-speed copying.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating an example of a configuration of an apparatus according to an embodiment of the present invention.

FIG. 2 is a flowchart illustrating an example of copy information registration processing according to an embodiment of the present invention.

FIG. 3 is a flowchart illustrating an example of a process at the time of copying according to an embodiment of the present invention;

[Explanation of symbols]

Reference Signs List 10 playback apparatus, 11 spindle motor, 12 optical pickup, 16 copy information detection section, 17 control section, 19 memory, D1 disk, t ₁ copy information recording track

Claims (6)

[Claims] 1. An optical recording medium in which a data recording track is formed in a predetermined state and data is reproduced by irradiating the track with a laser beam, wherein at least a predetermined data recording area is defined as the data recording track. An optical recording medium configured to be destroyed by irradiating the optical recording medium with a predetermined laser beam. 2. The optical recording medium according to claim 1, wherein the predetermined data is data relating to copy restriction. 3. A reproducing means for reproducing data recorded on a recording medium on which predetermined software is recorded, a data discriminating means for discriminating predetermined data from data reproduced by the reproducing means, and the data discriminating means. When the above predetermined data is determined,
Control means for performing control for permitting copying to another recording medium only a predetermined number of times when reproducing the software recorded on the recording medium; and a recording track for destroying a recording location of the data determined by the data determining means. A recording medium reproducing device provided with a destruction means. 4. The recording medium reproducing apparatus according to claim 3, wherein when the control for permitting the copy is performed, the fact that the control for permitting the copy is performed is stored together with an identification code unique to the software. A recording medium reproducing apparatus provided with means. 5. The recording medium reproducing apparatus according to claim 3, wherein, as said recording track destroying means, said reproducing means controls to irradiate a laser beam for reproduction onto said recording medium, A recording medium reproducing apparatus as means for performing processing for controlling a driving state to a state different from a normal reproducing state. 6. The recording medium reproducing apparatus according to claim 3, wherein said control means is provided only when said reproducing means reproduces data recorded on said optical recording medium at least twice as fast as a normal reproducing speed. A recording medium reproducing apparatus for performing a process of outputting a signal for permitting copying based on the determination by the data determining means.