JPH1011894A - Receiving, recording and reproducing system for charged scrambled pay-broadcasting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely cancel scrambling of main information of a broadcasting receiving signal even when this broadcasting receiving signal is received and viewed immediately after recording and viewing a broadcasting recording signal. SOLUTION: A key is extracted from a received broadcasting signal and is held in a received key holding means 46, and at the time of recording the broadcasting signal, this key is multiplexed with the broadcasting receiving signal, and they are recorded on a recording medium. At the time of reproducing and viewing the recorded broadcasting signal, the key is extracted from the reproducing signal and is held in reproduced key holding means 47, and the reproducing signal is descrambled by using this key. Then, a viewer propriety judging means 50 is provided for the purpose of judging whether a receiving contract of the charged scrambled broadcasting is presently available or not upon occurrence of a reproducing and viewing request and prohibiting descrambling if unavailable.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for receiving, recording, and reproducing paid scrambled broadcasts in which main information such as broadcast signals, particularly audio and video, is scrambled.

[0002]

2. Description of the Related Art There are two types of pay broadcasting: a flat system in which a program can be freely watched for a predetermined period for a predetermined amount of money, and a hyper-view system in which a fee is paid only for watching the program. In both types of broadcasting, the main information such as audio and video is usually scrambled, and the scramble can be released and the program can be viewed by signing a viewing contract and paying a fee.

FIG. 10 shows a general configuration example of a system for receiving, recording, and reproducing flat pay broadcasts. In flat pay broadcasting, a key for descrambling is multiplexed with a broadcast signal and transmitted. The key extracting means 5 extracts a descrambling key multiplexed on the broadcast signal received by the receiving means 1 and causes the receiving key holding means 6 to hold the descrambling key. The descrambling means 9 descrambles the scramble applied to the main information such as the video signal and the audio signal using the descrambling key held in the reception key holding means 6, and outputs the descrambled main information to the recording means 2 and the monitor. Is output.

However, in this method, since the descrambled main information is recorded on a recording medium, it is possible to reproduce and view a pay-broadcast program even after the reception contract period has expired. There is a problem that occurs.

Next, a scramble system currently employed in flat pay broadcasting will be described with reference to FIG.

The transmitting side scrambles the main information (video and audio signals) of the program using the scramble key Ks updated every few seconds. The scramble key Ks is encrypted into Ks' using the work key Kw updated once a month, for example, and then multiplexed with the scrambled main information and transmitted almost always. The work key Kw is a unique key Km for each set-top box (STB) distributed to each home.
, And is also multiplexed with the program data as an encrypted work key Kw ′ and transmitted, for example, once a month.

The STB distributed to each home can decrypt only the work key Kw 'encrypted with its own unique key Km. Work key K encrypted with this unique key Km
Since w 'is transmitted only once a month, as described above, the STB receives and decrypts the encrypted work key Kw', and then waits until the next encrypted work key Kw 'is transmitted. The decrypted work key Kw must be held. In addition, the transmitting side sends the work key K encrypted with the unique key Km of the STB to ST # having canceled the viewing contract.
Do not transmit w '. Therefore, after the work key Kw is changed, the scramble cannot be released by the STB whose viewing contract is canceled.

FIG. 12 is a diagram showing a configuration example of a pay digital broadcast receiving system employing this scramble system. In pay digital broadcasting, an MPEG transport stream is transmission information. This transport stream is composed of a plurality of packets, and a main information packet containing main information such as video and audio data is scrambled. Key information for descrambling is contained in another attached information packet.

In the pay digital broadcast receiving system shown in FIG. 12, a tuner 11 first receives a broadcast signal and outputs a transport stream. The TS packet separating means 13 separates the main information packet in the transport stream and sends it to the MPEG decoder 14, and separates the attached information packet. An encryption scramble key Ks ′ and an encryption work key Kw ′ necessary for descrambling the separated auxiliary information packet are extracted by a Ks ′ extraction unit 16 and a Kw ′ extraction unit 17, respectively.

Next, the Kw decryption means 18 decrypts the encrypted work key Kw 'using the unique key Km of the STB to obtain a work key Kw. Further, the encrypted scramble key Ks' is decrypted by the Ks decryption means 15 using the work key Kw to obtain a final scramble key Ks. Using this scramble key Ks, the scramble applied to the main information packet is released by the descrambling means 12. Also, since the encrypted work key Kw 'which can be decrypted with the unique key Km is transmitted only once a month, when the encrypted work key Kw' is received, the decrypted work key Kw is used for the next encryption. Key memory 19 for reception until work key Kw 'is received
To be kept.

The descrambling means 12 can descramble some of the packets. In this case, the unmodified packets are passed through as they are.

[0012] Even in such a pay digital broadcast receiving system, it is possible to reproduce and view a pay broadcast program even after the reception contract period has expired in order to record the descrambled data on a recording medium. That is, M
Signal from point before or after PEG decoder 14
If you take out II or signal III and record it on a recording medium,
No restriction can be placed on the reproduction of the recorded signal.

Therefore, a method of recording data with scrambled data, that is, recording a transport stream directly from the output (I) of the tuner 11 can be considered. However, this method also has the following problem.

Since the scramble key Ks is almost always transmitted, it can be recorded on a recording medium together with the main information. However, since the work key Kw suitable for the user is not always transmitted, the work key Kw cannot always be recorded on the recording medium together with the main information. When a recording medium on which the work key Kw is not recorded is reproduced, the work key Κw at the time of recording is the same as the work key Kw currently held by the STB, that is, the work key Kw is recorded between the recording time and the reproduction time. Only when the key Kw has not been updated, the reproduction signal can be descrambled. When the work key Kw is updated, the scramble of the main information recorded on the recording medium cannot be descrambled again.

[0015] In addition, when a work key suitable for oneself is accidentally transmitted at the time of recording and can be recorded on a recording medium, the following problem occurs. That is, since the scramble of the signal reproduced from the recording medium on which the work key is recorded is released even after the STB contract has expired, a copyright problem still arises. Also, when the STB inputs a work key suitable for itself, the STB unconditionally stores the work key in the memory. Therefore, even when an old recording medium on which the work key is recorded is reproduced, the old work key is stored in the memory. Would.
Then, the scramble of the reproduction data can be released, but even if the reproduction is terminated and the broadcast reception is resumed, the STB retains the old work key, so that the tuner 11 cannot descramble the data received. The only way to resolve this situation is to wait for a work key suitable for the user to be transmitted, and it may not be possible to descramble the received data for at least one month.

Next, a description will be given of a recording / reproducing system for pay-per-view pay broadcasting. Although there are few examples of the pay-per-view broadcasting at present, it is considered that the broadcasting will become mainstream as the digital broadcasting era progresses and the number of channels increases. FIG. 13 is a diagram showing a general configuration of the receiving / recording / reproducing system of this pay-per-view pay broadcasting. The broadcast signal here is obtained by further multiplexing a plurality of pieces of program information obtained by multiplexing scrambled main information and program ancillary information including fee information specific to the program and a descrambling key.

In this receiving / recording / reproducing system, the viewing program information extracting means 22 extracts a descrambling key and fee information from the signal received by the receiving means 21. The viewer charging means 24 charges the reception and viewing of the program according to the fee information, and gives the descrambling means 23 a descrambling key only during the charging to release the scramble applied to the main information.

In the case where such a broadcast is received and stored in a recording medium, a signal in an unscrambled state is conventionally recorded on the recording medium. Had occurred.

FIG. 14 shows an example of the configuration of a pay-per-view digital broadcast receiving system. Here, the broadcast signal is obtained by further multiplexing a plurality of pieces of program information obtained by multiplexing a main information packet including scrambled video and audio data and an auxiliary information packet including a program-specific fee information and a descrambling key. MPEG transport stream.

In this system, the viewing TS packet separation means 33 extracts only the packets of the program desired to be viewed from the transport stream, and sends the attached information packets to the charging system 34. The charging system 34 sends the descrambling key in the attached information packet to the descrambling means 35 for viewing, and the tuner 36
Urges descrambling of the scramble applied to the main information packet in the transport stream received at. The descrambled main information packet is the MPEG decoder 3
In step 7, the signal is converted into a normal video / audio signal and output to the monitor. The charging system 34 charges the reception and viewing of the program according to the fee information in the attached information packet.

[0021]

As described above, pay broadcasting includes a flat system in which a program can be freely viewed for a predetermined period for a predetermined amount of money, and a hyper-view system in which a fee is paid only for the viewing amount. In either of these methods, when recording is performed by the current analog VCR, the recorded tape can be reproduced semipermanently without any restrictions. Currently, the only way to prevent this is to insert a copy protection signal into the analog output of the STB so that it cannot be recorded by the VCR. In other words, there were only two types of recording / reproduction of pay programs, completely prohibited or completely unlimited.

At present, when recording the digital broadcast with a device capable of directly recording and reproducing digital data, such as a digital VCR, two methods are considered: recording a ΜPEG bit stream after packet separation and recording an MPEG bit stream before packet separation. Can be

In this case, since the scramble has already been released, the recorded content can be viewed without any limit without being charged thereafter. Also, only the same program as the one selected for viewing can be recorded, and no counterprogram recording can be performed. Further, the same fee is charged for viewing only, recording only, and both viewing and recording.

In this case, simultaneous recording of a plurality of programs is possible, but charging for the recording operation cannot be performed. In a flat pay broadcast (or a broadcast employing the same scramble method), the key for descrambling a program is changed periodically, so that it becomes impossible to descramble again after a lapse of time after recording. Sometimes it happens that all the keys for descrambling are recorded on tape,
In this case, the scramble may be released even if the contract is expired in the tape reproduction, and the scramble of the broadcast may not be released after the reproduction even during the contract.

The present invention has been made to solve such a problem, and it is intended to receive, record and reproduce a pay scrambled broadcast in which the scramble applied to the main information of the recorded pay scrambled broadcast can be surely canceled at the time of the reproduction. It aims to provide a system.

The present invention also provides a pay scrambled broadcast capable of reliably releasing the scramble applied to the main information of the broadcast reception signal even when the broadcast reception signal is received and viewed immediately after the reproduction and viewing of the broadcast recording signal. It aims to provide a reception recording / playback system.

A further object of the present invention is to provide a pay scrambled broadcast receiving / recording / reproducing system capable of prohibiting the descrambling of the main information in the reproduction of a recorded broadcast signal during the invalid period of the broadcast receiving contract. I have.

It is a further object of the present invention to provide a pay scrambled broadcast receiving / recording / reproducing system which can charge not only the paid / scrambled broadcast received / viewed but also its recording.

Another object of the present invention is to provide a pay scrambled broadcast receiving / recording / reproducing system which can perform not only the fee-based scrambled broadcast receiving / viewing but also the recording and reproduction thereof.

Further, the present invention relates to a pay scrambled broadcast receiving / recording / reproducing system capable of recording one program information in a pay scrambled broadcast in which a plurality of pieces of program information are multiplexed while recording other program information. It is intended to be provided.

[0031]

In order to achieve the above object, a pay scrambled broadcast receiving / recording / reproducing system according to the present invention comprises: a main information scrambled; In the pay-scramble broadcast receiving / recording / reproducing system, key information for descrambling the main information is multiplexed, and the key information is intermittently multiplexed with the main information. Receiving means, and receiving key extracting means for extracting the key information from the receiving information of the receiving means,
A reception key holding unit that holds the latest key information extracted by the reception key extraction unit; a key multiplexing unit that multiplexes the key information held by the reception key holding unit with the reception information of the reception unit; Recording means for recording information in which the key information is multiplexed by key multiplexing means, reproducing means for reproducing the recorded information of the recording means, and reproduced key extracting means for extracting the key information from the reproduced information of the reproducing means; A reproduction key holding unit for holding key information extracted by the reproduction key extraction unit;
And descrambling means for descrambling the scramble applied to the main information included in the reproduction information of the reproduction means by using the key information held in the reproduction key holding means.

According to the present invention, even when the key information in the pay scrambled broadcast is intermittently transmitted, the latest key information can be multiplexed and recorded on the received information of the pay scrambled broadcast. Thus, the scramble applied to the main information at the time of reproduction / viewing of the recorded broadcast signal can be reliably released.

[0033] Further, according to a second aspect of the present invention, there is provided a pay scrambled broadcast receiving / recording / reproducing system.
The scrambled main information is multiplexed with key information for descrambling the main information, and the key information is intermittently multiplexed with the main information. In the system, receiving means for receiving the pay scrambled broadcast,
A receiving key extracting unit that extracts the key information from the receiving information of the receiving unit; a receiving key holding unit that holds the latest key information extracted by the receiving key extracting unit; Key multiplexing means for multiplexing the key information held in the reception key holding means, recording means for recording the information in which the key information is multiplexed by the key multiplexing means, and reproducing means for reproducing the recorded information of the recording means; A reproducing key extracting unit for extracting the key information from the reproducing information of the reproducing unit; a reproducing key holding unit for storing the key information extracted by the reproducing key extracting unit; The scramble applied to the main information included in the reception information of the reception means is released using the latest key information held in the reception key holding means, and the reproduction and viewing of the pay scramble broadcast is And having a descrambling means for descrambling which is applied to the main information contained in the reproduction information of the raw unit by using the key information held in the reproduction key holding means.

In the present invention, the latest key information obtained from the received information at the time of receiving / viewing the pay scrambled broadcast is stored in the receiving key holding means, and the key information obtained from the reproduced information at the time of playing / viewing the paid scrambled broadcast is transmitted to the playback key. Since the holding means is separately held, even when the broadcast reception signal is received and viewed immediately after the reproduction and viewing of the broadcast recording signal, the scramble applied to the main information of the broadcast reception signal can be reliably released. . Furthermore, the present invention relates to claim 3
As described in the above, in the pay scrambled broadcast receiving / recording / reproducing system according to claim 1 or 2, a judging means for judging whether or not a pay scrambled broadcast receiving contract is currently valid, and said judging means When it is determined that the subscription contract for the pay scrambled broadcast is invalid, the control unit further includes control means for prohibiting the descramble of the scramble applied to the main information included in the reproduction information of the reproduction means.

According to a fourth aspect of the present invention, there is provided a pay scrambled broadcast receiving / recording / reproducing system according to the first or second aspect, wherein descrambling of the main information in the received signal of the receiving means is performed. Determining means for determining whether or not descrambling is impossible, and control means for prohibiting descrambling of scrambling applied to main information included in the reproduction information of the reproducing means when the determining means determines that descrambling cannot be performed. It is characterized by.

According to a fifth aspect of the present invention, in the pay scramble broadcast receiving / recording / reproducing system according to the first or second aspect, the key information is extracted from the time when the key information is extracted by the receiving key extracting means. Measuring means for measuring the elapsed time of and resetting when the next key information is extracted;
When the elapsed time measured by the measuring means has reached a predetermined time, the control means further comprises control means for prohibiting descrambling of scrambling applied to main information included in the reproduction information of the reproducing means.

In the inventions described in claims 3 to 5, the descrambling of the main information in reproducing the recorded broadcast signal can be prohibited during the invalid period of the pay scrambled broadcast reception contract.

Further, according to the present invention, as described in claim 6, the scrambled main information and the auxiliary information including the key information and the charge information for descrambling the scrambled on the main information are included. In a multiplexed pay scrambled broadcasting reception recording / reproducing system, receiving means for receiving the pay scrambled broadcasting, and key information received from the receiving means using key information in the attached information received by the receiving means. Descrambling means for canceling the scramble applied to the receiver, viewing / charging means for charging for reception / viewing of the pay scrambled broadcast based on charge information in the attached information received by the receiving means, and Recording means for recording the reception information, and based on the fee information in the additional information included in the reception information recorded by the recording means, And having a recording accounting unit for charging the recording of charges scrambled broadcast.

According to the present invention, not only reception and viewing of pay scrambled broadcasting but also its recording can be charged, which can contribute to solving copyright problems.

Further, according to the present invention, as described in claim 7, the scrambled main information and the key information for descrambling the scramble applied to the main information and the auxiliary information including the charge information are included. In a multiplexed pay scrambled broadcast receiving recording / reproducing system, a receiving means for receiving the pay scrambled broadcast, and key information in the attached information received by the receiving means are used to multiplex the main information received by the receiving means. Descrambling means for canceling the received scramble, billing means for viewing which charges for reception and viewing of the pay scrambled broadcast based on the fee information in the attached information received by the receiving means, and reception information of the receiving means. Recording means for recording the information, and based on the charge information in the additional information included in the reception information recorded by the recording means, Recording charging means for charging for the recording of the scrambled broadcast; reproducing means for reproducing the recorded information of the recording means; and the pay scrambled broadcast based on the fee information in the attached information included in the reproduced information of the reproducing means. And a charging means for reproduction for charging for reproduction of the program.

According to the present invention, not only reception and viewing of paid scrambled broadcasts, but also recording of paid scrambled broadcasts and playback / viewing of the recorded paid scrambled broadcasts can be charged, thereby solving copyright problems. Can be contributed to.

Further, according to the present invention, as described in claim 8, scrambled main information and key information for descrambling the scrambled main information and auxiliary information including charge information are included. In a pay scrambled broadcast receiving / recording / reproducing system in which one program information is multiplexed and a plurality of the program information are multiplexed, receiving means for receiving the pay scrambled broadcast, And a program information extracting means for extracting program information arbitrarily selected for viewing from the program information, and using the key information in the attached information included in the program information extracted by the program information extracting means to extract the program information. Descrambling means for descrambling the main information contained therein, and program information extracted by the viewing program information extracting means Viewing billing means for billing the reception and viewing of the pay scrambled broadcast based on the fee information in the included accessory information, and extracting program information arbitrarily selected for recording from the reception information of the receiving means Recording program information extracting means, recording means for recording the program information extracted by the recorded program information extracting means, and charge information in the attached information included in the program information extracted by the recorded program information extracting means. Recording accounting means for accounting for the program recording of the pay scramble broadcast.

According to the present invention, not only reception and viewing of pay scrambled broadcasts, but also recording of paid scrambled broadcasts can be charged, which contributes to solving copyright problems. Also, while watching one program in a pay scrambled broadcast in which a plurality of pieces of program information are multiplexed, other program information can be recorded on a recording medium, and furthermore, a plurality of multiplexed pieces of program information can be recorded.

Further, according to the present invention, as described in claim 9, the scrambled main information and key information for descrambling the scrambled main information and additional information including charge information are included. In a pay scrambled broadcast receiving / recording / reproducing system in which one program information is multiplexed and a plurality of the program information are multiplexed, receiving means for receiving the pay scrambled broadcast, And a program information extracting means for extracting program information arbitrarily selected for viewing from the program information, and using the key information in the attached information included in the program information extracted by the program information extracting means to extract the program information. Descrambling means for descrambling the main information included therein, and program information extracted by the viewing program information extracting means. Viewing charging means for charging for reception and viewing of the pay scrambled broadcast based on the charge information in the attached information, and extracting program information arbitrarily selected for recording from the reception information of the reception means Recording program information extracting means, and recording means for recording the program information extracted by the recorded program information extracting means,
Recording charging means for charging the recording of the pay scrambled broadcast based on the charge information in the additional information included in the program information extracted by the recorded program information extracting means, and reproduction for reproducing the recording information of the recording means Means,
And a charging unit for reproduction for charging the reproduction of the pay scrambled broadcast based on the charge information in the attached information included in the program information reproduced by the reproduction unit.

According to the present invention, it is possible to charge not only the reception and viewing of the pay scrambled broadcast, but also the recording of the paid scrambled broadcast and the reproduction and viewing thereof.
It can contribute to solving copyright issues. Also, while watching one program in a pay scrambled broadcast in which a plurality of pieces of program information are multiplexed, other program information can be recorded on a recording medium, and furthermore, a plurality of multiplexed pieces of program information can be recorded.

According to a tenth aspect of the present invention, in the pay scramble broadcast receiving / recording / reproducing system according to the sixth or eighth aspect, the additional information includes fee information for reception / viewing and recording. Wherein the viewing charging means charges the reception / viewing of the pay scrambled broadcast based on the reception / viewing fee information, and the recording charging means charges the paid scrambled broadcast based on the recording fee information. It is characterized by charging for recording.

Further, according to the present invention, in the reception / recording / reproduction system for pay-scramble broadcasting according to claim 7 or 9, the additional information in the program information is for receiving / viewing and recording. And fee information for reproduction and viewing, wherein the charging means for viewing charges the reception and viewing of the pay scrambled broadcast based on the charging information for reception and viewing, and the charging means for recording comprises the fee for recording. The recording of the pay scrambled broadcast is charged based on the information, and the reproduction charging means charges the reproduction of the pay scrambled broadcast based on the reproduction / viewing fee information.

With such a configuration, it is possible to perform appropriate accounting for each of the reception / viewing, recording, and reproduction / viewing.

[0049]

Embodiments of the present invention will be described below.

FIG. 1 is a diagram showing the configuration of a pay scrambled broadcast receiving / recording / reproducing system according to a first embodiment of the present invention.

The pay scrambled broadcast signal is obtained by multiplexing main information including scrambled video and audio data and a descrambling key for descrambling the main information. It is. However, in this broadcast signal, the descrambling key is transmitted intermittently, for example, once a month with an update, and is not always transmitted.

When receiving and viewing this broadcast signal, first, the receiving means 41 receives the broadcast signal. Selection means 44
Selects the broadcast reception signal output from the receiving means 41 and sends it to the key extracting means 45. The key extracting means 45 extracts a descrambling key multiplexed on the broadcast reception signal. The extracted descrambling key is held in the reception key holding means 46. The descrambling means 49 uses the descrambling key held in the receiving key holding means 46 to descramble the main information in the broadcast reception signal.
The descrambled main information is output to the monitor in the form of a normal video / audio signal, thereby enabling reception and viewing of the pay scrambled broadcast.

When recording a broadcast signal on a recording medium, the key multiplexing means 48 multiplexes the descrambling key held in the reception key holding means 46 with the broadcast reception signal of the receiving means 41. Then, the multiplexed signal is recorded on the recording medium by the recording means 42.

When the broadcast signal recorded on the recording medium is reproduced and viewed, the reproducing means 43 reads information from the recording medium and outputs a reproduced signal. The selecting means 44 sends this reproduced signal to the key extracting means 45, where it extracts the descrambling key contained in the reproduced signal. The extracted descrambling key is held in the reproduction key holding means 47. The descrambling means 49 descrambles the scramble applied to the main information in the reproduction signal using the descrambling key held in the reproduction key holding means 46.

On the other hand, when a request for reproduction / viewing of a recorded broadcast signal is issued, the viewer availability determining means 50 determines whether or not a pay scrambled broadcast reception contract is currently valid, as shown in FIG. 3, for example. The result is notified to the control means 51 (step 31). If the contract is valid, control means 5
1 permits the descrambling applied to the main information in the reproduced signal (step 32), and controls the descrambling means 49 so as to prohibit the descrambling if the contract is invalid (step 33). As a result, it is possible to prevent the broadcast signal recorded on the recording medium from being reproduced and viewed when the contract is invalidated, thereby avoiding a copyright problem.

According to this embodiment, even when the descrambling key is intermittently transmitted with an update once a month, for example, the reception key holding means is used when recording the broadcast signal on the recording medium. By multiplexing the latest descrambling key held in 46 with the broadcast signal, the scramble applied to the main information in the broadcast signal at the time of its reproduction can be reliably released.

In this embodiment, the latest scramble descrambling key obtained during the reception and viewing of the pay scrambled broadcast is stored in the reception key holding means 46, and the descrambling key obtained during the playback and viewing of the paid scrambled broadcast is stored in the reproduction key storage. Since each of them is separately held in the means 47, the scramble applied to the main information of the broadcast received signal can be canceled even when the pay scrambled broadcast is received and viewed immediately after the pay scrambled broadcast is reproduced and viewed.

Further, according to the present embodiment, the descrambling applied to the main information of the pay scramble broadcast recorded on the recording medium is prohibited when the contract is invalidated.
It is possible to prevent the playback and viewing of the paid scrambled broadcast when the contract is invalid. This can contribute to solving the copyright problem.

Next, a second embodiment in which the present invention is applied to a flat digital pay-broadcast receiving / recording / reproducing system will be described.

FIG. 2 is a diagram showing a configuration of a receiving / recording / reproducing system according to the second embodiment. The pay scrambled broadcast signal here is composed of a main information packet including scrambled video and audio data, an encryption scramble key Ks' for decrypting the scramble applied to the main information packet, and an encryption work key Kw. 'Is a multiplexed transport stream. However, the encryption scramble key Ks 'is updated every few seconds, and the encryption work key Kw' is intermittently transmitted with an update once a month, for example.

When receiving and viewing the broadcast signal, the tuner 52 first receives the broadcast signal. The multiplexer 53 selects the received transport stream output from the tuner 52 and sends it to the descrambling means 54. The descrambling means 54 descrambles only descrambling-capable packets, and sends out the descrambled packets to the TS packet separating means 55. The TS packet separating means 55 separates the main information packet from the received transport stream and
The information packet is sent to the G decoder 56 and is separated and sent to the Ks 'extracting means 58 and the Kw' extracting means 59, respectively. Ks 'extracting means 58 and Kw' extracting means 5
9 is an encryption scramble key K from the attached information packet
s ′ and the encrypted work key Kw ′ are extracted.

Next, the Kw decryption means 57 decrypts the encrypted work key Kw ′ using the unique key Km of the STB to obtain a work key Kw. Further, the Ks decrypting means 63 uses the work key Kw to decrypt the encrypted scramble key Ks' to obtain a final scramble key Ks. Using the scramble key Ks, the scramble applied to the main information packet is released by the descrambling means 54. Also the unique key Km
Since the encrypted work key Kw ′, which can be decrypted by the encryption work key Kw ′, is transmitted only once a month, for example, when the encrypted work key Kw ′ is received, it is stored in the recording key memory 62 and the encrypted work key Kw ′ is stored. Work key Kw obtained by decrypting Kw '
Is stored in the reception key memory 60. The main information packet descrambled in this manner is transmitted to the MPEG decoder 5.
6, a normal video / audio signal can be obtained, and the reception and viewing of the broadcast signal become possible.

When a broadcast signal is recorded on a recording medium by a recording means such as a digital VCR, the Kw 'insertion means 65 outputs the latest transport information stored in the recording key memory 62 to the received transport stream output from the tuner 52. The encrypted work key Kw 'is inserted (multiplexed) and sent to the recording means. This makes it possible to always record the encrypted work key Kw ′, which is not always included in the broadcast signal, on the recording medium. When the broadcast signal recorded on the recording medium is reproduced and viewed, the output of the reproducing means (digital VCR or the like) is selected by the multiplexer 53 and sent to the descrambling means 54. The descrambling means 54 descrambles only the packets that can be descrambled,
The descrambled packet is sent to the TS packet separating means 55. The TS packet separating means 55 separates the main information packet in the reproduced transport stream and sends it to the MPEG decoder 56, and also extracts the auxiliary information packet from the Ks 'extracting means 58 and Kw' extracting means 59.
Respectively. The Ks 'extracting means 58 and Kw' extracting means 59 respectively extract the encrypted scramble key Ks 'and the encrypted work key Kw' from the attached information packet.

Next, the Kw decryption means 57 decrypts the encrypted work key Kw 'using the unique key Km of the STB to obtain the work key Kw. Further, the Ks decrypting means 63 uses the work key Kw to decrypt the encrypted scramble key Ks' to obtain a final scramble key Ks. Using the scramble key Ks, the scramble applied to the main information packet is released by the descrambling means 54. At this time, since the reproduced work stream does not always include the encrypted work key Kw ′, the decrypted work key Kw
Is stored in a reproduction key memory 61 different from that at the time of reception. The descrambled main information packet is transmitted to MP
A normal video / audio signal is obtained by inputting to the EG decoder 56, so that the broadcast signal can be reproduced and viewed.

Thus, according to the present embodiment, when a broadcast signal is recorded on a recording medium, the latest encrypted work key Kw ′ held in the recording key memory 62 is inserted (multiplexed) into the broadcast signal. The encrypted work key Kw ', which is not always included in the broadcast reception signal, can always be recorded on the recording medium. Therefore, when the broadcast signal is reproduced and viewed, the scramble applied to the main information packet in the broadcast signal can be reliably released.

In the present embodiment, the latest work key Kw decrypted at the time of reception / viewing of the pay scrambled broadcast is used.
Is stored in the reception key memory 60, and the work key Kw decrypted during reproduction / viewing of the pay scrambled broadcast is stored in the reproduction key memory 6.
1 are separately held, so that even when switching to reception / viewing of pay scrambled broadcast immediately after playback / viewing of paid scrambled broadcast, scrambling applied to main information of the broadcast reception signal can be released.

On the other hand, when a request for reproduction / viewing of a recorded broadcast signal is issued, the viewer availability determination means 64 determines whether or not a pay scrambled broadcast reception contract is currently valid, as shown in FIG. Step 31) If the contract is valid, the decryption of the encrypted work key Kw 'is permitted and the descrambling operation is permitted (step 32). If the contract is invalid, the decryption of the encrypted work key Kw' is prohibited. To prohibit the descrambling operation (step 33). As a result, it is possible to prevent the broadcast signal recorded on the recording medium from being reproduced and viewed when the contract is invalidated, thereby avoiding a copyright problem.

The specific method for confirming that the pay scramble broadcasting reception contract is invalid and prohibiting the descrambling is as follows.

As shown in FIG. 4, when reproduction / viewing of a recorded broadcast signal is requested, a broadcast reception signal is input to descrambling means 54 (step 41), and scramble applied to main information in the broadcast reception signal is performed. It is checked whether or not can be canceled (step 42). After this confirmation, a reproduction signal is input to the descrambling means 54 (steps 43 and 4).
4). If the scramble applied to the main information in the broadcast reception signal can be released by the above confirmation, the contract is regarded as valid and the descrambling of the reproduction signal is permitted (step 45). If the descrambling of the broadcast reception signal cannot be canceled, the contract is regarded as invalid and the descrambling of the reproduction signal is prohibited (step 46).

In the paid scramble broadcasting, the encrypted work key Kw 'is sent at a predetermined time interval such as one month. Therefore, as shown in FIG. 5, time measurement is started from the time when the encrypted work key Kw ′ is received (step 51). This time measurement is based on the next encrypted work key Kw '.
It is reset every time it receives. When a request for playback / viewing of the pay scrambled broadcast is generated, the time measurement result at that time is checked, and this measured time is compared with a predetermined time corresponding to the transmission interval of the encrypted work key Kw '(step 5).
2). If the measured time exceeds the predetermined time, it is determined that the contract has expired, and the descrambling of the reproduced signal is prohibited (step 53). If the measured time is equal to or shorter than the predetermined time, the contract is regarded as valid and the descrambling of the reproduced signal is permitted (step 54).

Next, as a third embodiment of the present invention, the second embodiment
FIG. 6 shows a modified sequence of the flat digital pay-broadcast reception / recording / reproducing system of FIG.

As shown in the figure, the reception recording / reproduction system stores an encrypted work key Kw ′ before decryption during reception / viewing of a pay scrambled broadcast in a reception key memory 60a, and an encryption key before decryption during reproduction / viewing. The reproduction work key Kw ′ is stored in the reproduction key memory 61a. In the system of FIG. 2, the encrypted work key Kw after decryption is stored in the memory, but the encrypted work key Kw ′ before decryption may be stored in the memory as in the present embodiment.

Next, a fourth embodiment of the present invention will be described.

FIG. 7 is a diagram showing a configuration of a pay scrambled broadcast receiving / recording / reproducing system according to the fourth embodiment.

The pay scrambled broadcast signal here is composed of program information obtained by multiplexing main information including scrambled video and audio data and program ancillary information including a program-specific fee information and a scramble descrambling key. Further, a plurality is multiplexed.

When the broadcast signal is received and viewed, the broadcast signal is first received by the receiving means 70. The selecting means 71 selects a broadcast reception signal output from the receiving means 70 and sends it to the viewing program information extracting means 72. Viewing program information extracting means 72
Extracts one program information arbitrarily selected by a viewer from a plurality of pieces of program information multiplexed in a broadcast reception signal, sends main information among the pieces of program information to a descramble means 73, and outputs ancillary information for viewing. Send to billing means 74. The viewing charging unit 74 charges the reception and viewing of the pay scrambled broadcast according to the fee information included in the attached information, and outputs a descrambling key included in the attached information to the descrambling unit 73.

The billing by the viewing billing means 74 refers to, for example, a process of calculating a fee corresponding to the usage of the pay scrambled broadcast based on the fee information and recording the result in the built-in memory.

The descrambling means 73 descrambles the scramble applied to the program main information sent from the viewing program information extracting means 72 using a descrambling key. The descrambled main information is output to the monitor in the form of a normal video / audio signal. This allows the user to view the desired program.

When recording a broadcast signal on a recording medium, the broadcast reception signal output from the receiving means 70 is input to the recorded program information extracting means 75. The recorded program information extracting means 75 extracts program information arbitrarily selected by the viewer from a plurality of program information multiplexed on the broadcast reception signal. At this time, when a plurality of programs are selected by the viewer, the recorded program information extracting means 75 selects all of the selected programs (including a program currently being received and viewed). Extract information.

The additional information in the program information extracted by the recorded program information extracting means 75 is sent to the recording charging means 78. The recording charging means 78 charges for the recording of the program of the pay scrambled broadcast according to the charge information included in the attached information. The program information extracted by the recorded program information extracting means 75 is sent to the recording means 76 and recorded on a recording medium.

When reproducing and viewing the program information recorded on the recording medium, first, the reproducing means 77 reproduces the program information from the recording medium. At this time, the selecting means 71
7 and sends it to the viewing program information extracting means 72. The viewing program information extracting means 72 extracts one piece of program information arbitrarily selected by the viewer from one or more pieces of program information included in the playback signal, and sends the main information in the one piece to the descrambling means 73. At the same time, the attached information is sent to the viewing charging means 74. The viewing charging unit 74 charges the playback and viewing of the pay scrambled broadcast in accordance with the fee information included in the attached information, and outputs a descrambling key to the descramble unit 73 in the same manner as when receiving and viewing the broadcast signal.

The descrambling means 73 descrambles the scramble applied to the main information in the program information sent from the viewing program information extracting means 72 using the descrambling key. The descrambled main information is output to the monitor in the form of a normal video / audio signal. Thus, reproduction and viewing of the desired program becomes possible.

Therefore, according to the present embodiment, it is possible to charge for not only the reception and viewing of the pay scrambled broadcast, but also the recording and playback / playback of the paid scrambled broadcast, thereby solving the copyright problem. Can contribute. Further, according to the present embodiment, while receiving and viewing one program information in a pay scramble broadcast in which a plurality of pieces of program information are multiplexed, other program information can be recorded on a recording medium,
Moreover, a plurality of multiplexed program information can be recorded.

FIG. 8 shows, as a fifth embodiment, a configuration of a modified sequence of the pay-scrambled broadcast reception / recording / reproduction system of FIG. 7 which is the fourth embodiment.

When receiving and viewing the broadcast signal, first, the broadcast signal is received by the receiving means 70. The selecting means 71 selects a broadcast reception signal output from the receiving means 70 and sends it to the program information extracting means 79. The program information extracting means 79 extracts one piece of program information arbitrarily selected by the viewer from a plurality of pieces of program information multiplexed on the broadcast reception signal, and sends the main information among the pieces of program information to the descrambling means 73. The attached information is sent to the viewing charging means 74. Viewing billing means 74
Pays for the reception / viewing of the pay scrambled broadcast in accordance with the fee information included in the attached information, and outputs the descrambling key included in the attached information to the descrambling means 73.

The descrambling means 73 descrambles the scramble applied to the program main information sent from the program information extracting means 79 by using a descrambling key. The descrambled main information is output to the monitor in the form of a normal video / audio signal. This allows the user to view the desired program.

When recording a broadcast signal on a recording medium, the output of the receiving means 70 is input to the program information extracting means 79 in the same manner as when receiving and viewing, and the viewer selects any of a plurality of pieces of program information. The extracted program information is extracted. At this time,
When a plurality of programs are selected by the viewer, the program information extracting means 79 extracts all the selected program information. The additional information in the program information extracted by the program information extracting means 79 is sent to the recording charging means 78. The recording charging means 78 charges for the recording of the program of the pay scrambled broadcast according to the charge information included in the attached information. The program information extracted by the program information extracting means 79 is sent to the recording means 76 and recorded on a recording medium.

When reproducing and viewing the program information recorded on the recording medium, first, the reproducing means 77 reproduces the program information from the recording medium. At this time, the selecting means 71
7 is selected and sent to the program information extracting means 79.
The program information extracting means 79 outputs one or more program information arbitrarily selected by the viewer from one or more pieces of program information included in the reproduction signal.
The program information is extracted, the main information in the program information is sent to the descrambling means 73, and the auxiliary information is sent to the viewing charging means 74.
Send to The viewing charging unit 74 charges the playback and viewing of the pay scrambled broadcast in accordance with the fee information included in the attached information, and outputs a descrambling key to the descramble unit 73 in the same manner as when receiving and viewing the broadcast signal.

The descrambling means 73 descrambles the scramble applied to the main information in the program information sent from the program packet extracting means 79 using the descrambling key. The descrambled main information is output to the monitor in the form of a normal video / audio signal. Thus, reproduction and viewing of the desired program becomes possible.

As described above, in the present embodiment, means for extracting program information to be received and viewed from a broadcast reception signal, means for extracting program information to be recorded on a recording medium from a broadcast reception signal, and means for extracting broadcast information recorded on a recording medium Means for extracting the program information to be reproduced from the signal.
9.

Next, a sixth embodiment in which the present invention is applied to a pay-per-view digital broadcast receiving / recording / reproducing system will be described with reference to FIG.

The pay scrambled broadcast signal here is a program information obtained by multiplexing a main information packet containing scrambled video and audio data and an auxiliary information packet containing program-specific charge information and a descrambling key. Are further multiplexed.

When receiving and viewing the broadcast signal, the multiplexer 81 selects the received transport stream output from the tuner 80 and sends it to the viewing descrambler 82. The viewing descrambling means 82 descrambles only the descrambling-capable packets, and sends out the descrambled main information packet to the viewing TS packet separating means 83. TS for viewing
The packet separating means 83 separates the main information packet of one program arbitrarily selected by the viewer from the received transport stream and sends the main information packet to the MPEG decoder 84, and separates the auxiliary information packet of the program to the charging system 85. Send to

The charging system 85 charges the reception / viewing of the pay scrambled broadcast in accordance with the charge information in the attached information packet, and also uses the descrambling means 8 for viewing the descrambling key contained in the attached information packet.
Output to 2. The viewing descrambler 82 descrambles the scramble applied to the main information packet of the program using the descrambling key sent from the charging system 85. The descrambled main information packet is M
The signal is converted into a normal video / audio signal by the PEG decoder 84 and output to the monitor. This allows the user to view the desired program.

When recording a broadcast signal on a recording medium, the output of the tuner 80 is used as the recording TS packet separating means 86.
And the recording TS packet separating means 86
The main information packet and the auxiliary information packet of the program arbitrarily selected by the viewer are extracted from the received transport stream and transmitted to the charging system 85. At this time,
When a plurality of programs are selected, the recording TS packet separating unit 86 extracts information packets of all the selected programs.

[0096] The charging system 85 performs charging for the recording of the pay scrambled broadcast in accordance with the fee information included in the attached information packet. The main information packet and the auxiliary information packet of one or more programs extracted by the recording TS packet separating means 86 are sent to a digital VCR 87 as a recording means and recorded on a recording medium.

When reproducing and viewing a program recorded on a recording medium, the digital VCR 87 as reproducing means reads out a program information packet from the recording medium and outputs it as a reproduced transport stream. The multiplexer 81 sends the reproduced transport stream to the descrambling means 82 for viewing. The viewing descrambling means 82 descrambles only the descrambleable packets,
The descrambled packet is sent to the viewing TS packet separating means 83. The viewing TS packet separating means 83 separates the main information packet of one program arbitrarily selected by the viewer from the reproduced transport stream and sends it to the MPEG decoder 84,
Separate the attached information packet of the program and charge system 8
Send to 5. The charging system 85 charges the reproduction and viewing of the program according to the fee information in the attached information packet, and outputs the descrambling key included in the attached information packet to the viewing descrambling means 82. The viewing descrambler 82 descrambles the scramble applied to the main information packet of the program using the descrambling key sent from the charging system 85. The descrambled main information packet is an MPEG decoder 8
At 4, it is converted into a normal video / audio signal and output to the monitor. Thus, reproduction and viewing of the desired program becomes possible.

Thus, according to the present embodiment, not only reception and viewing of pay scrambled broadcasts, but also charging and recording of paid scrambled broadcasts and playback / playback thereof can be performed, which contributes to solving copyright problems. can do. Further, according to the present embodiment, while receiving and viewing one program information in a pay scramble broadcast in which a plurality of pieces of program information are multiplexed, other program information can be recorded on a recording medium. Information can be recorded.

Although not described in the above embodiment, the fee information included in the accessory information in the program information is composed of three fee information for reception / viewing, recording and reproduction / viewing. Each billing means performs billing according to the corresponding fee information. As a result, it is possible to perform appropriate charging for each of the reception / viewing, recording, and reproduction / viewing.

[0100]

As described above, according to the first aspect of the present invention,
According to the pay scrambled broadcast reception / recording / reproducing system described above, even if the key information in the pay scrambled broadcast is intermittently transmitted, the latest key information is multiplexed on the received information of the pay scrambled broadcast and recorded on a recording medium. , The scramble applied to the main information at the time of reproduction and viewing of the recorded broadcast signal can be reliably released.

According to the pay scrambled broadcast receiving / recording / reproducing system of the second aspect of the present invention, the latest key information obtained from the received information at the time of receiving / viewing the paid scrambled broadcast is used for the receiving key holding means, and the pay scrambled broadcast is used. Since the key information obtained from the reproduction information is separately held in the reproduction key holding means at the time of reproduction / viewing of the broadcast reception signal, even if the broadcast reception signal is received / viewed immediately after the reproduction / viewing of the broadcast recording signal, the broadcast reception signal The scramble applied to the main information can be reliably released.

According to the pay scrambled broadcast receiving / recording / reproducing system according to the third to fifth aspects of the present invention, the scramble applied to the main information in the reproduction of the recorded broadcast signal is canceled during the invalid period of the pay scrambled broadcast receiving contract. Can be banned.

According to the pay scrambled broadcast receiving / recording / reproducing system according to the sixth aspect of the present invention, it is possible to charge not only for the reception / viewing of the pay scrambled broadcast but also for the recording thereof, thereby eliminating the copyright problem. Can be contributed to.

According to the pay scrambled broadcast receiving / recording / reproducing system according to the seventh aspect of the present invention, not only pay scrambled broadcast receiving / viewing but also pay scrambled broadcast recording and recorded pay scrambled broadcast reproducing / viewing are provided. In each case, charging can be performed, which contributes to solving copyright problems.

According to the pay scrambled broadcast receiving / recording / reproducing system according to the eighth aspect of the present invention, it is possible to charge for not only pay scrambled broadcast reception / viewing but also pay scrambled broadcast recording. It can contribute to the resolution of the rights issue. Also, while watching one program in a pay scrambled broadcast in which a plurality of pieces of program information are multiplexed, other program information can be recorded on a recording medium, and furthermore, a plurality of multiplexed pieces of program information can be recorded.

According to the pay scrambled broadcast receiving / recording / reproducing system according to the ninth aspect of the present invention, not only the pay scrambled broadcast receiving / viewing, but also the pay scrambled broadcast recording and playback / viewing are charged. This can contribute to solving copyright problems. Also,
While viewing one program in a pay scrambled broadcast in which a plurality of pieces of program information are multiplexed, other program information can be recorded on a recording medium, and furthermore, a plurality of multiplexed program information can be recorded.

According to the pay scrambled broadcast receiving / recording / reproducing system according to the tenth and eleventh aspects of the present invention, it is possible to perform appropriate charging for each of the reception / viewing, recording and reproduction / viewing.

[Brief description of the drawings]

FIG. 1 is a diagram showing the configuration of a pay scrambled broadcast receiving / recording / reproducing system according to a first embodiment of the present invention;

FIG. 2 is a diagram showing a configuration of a flat digital pay-broadcast reception / recording / reproduction system according to a second embodiment of the present invention;

FIG. 3 is a flowchart showing descrambling prohibition control in the reception / recording / reproduction system of FIGS. 1 and 2;

FIG. 4 is a flowchart showing a specific procedure of descrambling prohibition control;

FIG. 5 is a flowchart showing a specific procedure of another descrambling prohibition control.

FIG. 6 is a diagram showing a modification (third embodiment) of the reception recording / reproduction system of FIG. 2;

FIG. 7 is a diagram showing the configuration of a pay scrambled broadcast receiving / recording / reproducing system according to a fourth embodiment of the present invention;

FIG. 8 is a diagram showing the configuration of a pay scrambled broadcast receiving / recording / reproducing system according to a fifth embodiment of the present invention;

FIG. 9 is a diagram showing the configuration of a pay-per-view digital broadcast pay scrambled broadcast receiving / recording / reproducing system according to a sixth embodiment of the present invention;

FIG. 10 is a diagram showing a configuration of a conventional flat pay-broadcast reception recording / reproduction system.

FIG. 11 is a diagram for explaining a scrambling method employed in flat pay broadcasting;

FIG. 12 is a diagram showing a configuration of a conventional pay digital broadcast receiving system.

FIG. 13 is a diagram showing the configuration of a conventional pay-view broadcast receiving / recording / playback system.

FIG. 14 is a diagram showing the configuration of a conventional pay-per-view digital broadcast receiving system.

[Explanation of symbols]

 41 receiving means 42 recording means 43 reproducing means 45 key extracting means 46 receiving key holding means 47 reproducing key holding means 48 key multiplexing means 49 … Descrambling means 50… viewer availability judgment means 51… control means 52… tuner 54… descrambling means 55… TS packet separation means 57… Kw decoding means 58… Ks' extracting means 59 Kw 'extracting means 60, 60a Receiving key memory 62, 62a Recording key memory 63 Ks decrypting means 65 Kw' inserting means 70 .. Receiving means 72... Viewing program information extracting means 73... Descrambling means 74... Viewing viewing charging means 75... Recording program information extracting means 78... Recording charging means 76. Means 7 ... Reproduction means 79 Program information extraction means 80 Tuner 82 Viewing descrambling means 83 Viewing TS packet separating means 85 Billing system 86 Recording TS Packet separating means 87 Digital VCR

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location H04N 7/16 H04L 9/00 641 H04N 5/92 Z (72) Inventor Shuji Abe Yokohama-shi, Kanagawa 8 Shinsugita-cho, Isogo-ku Inside Toshiba Multimedia Technology Research Institute

Claims (11)

[Claims] 1. A scrambled main information multiplexed with key information for descrambling the scrambled main information and the key information is intermittently multiplexed with the main information. In a broadcast reception recording / reproducing system, a receiving unit for receiving the pay scrambled broadcast, a receiving key extracting unit for extracting the key information from the receiving information of the receiving unit, and a latest receiving key extracted by the receiving key extracting unit Reception key holding means for holding key information; key multiplexing means for multiplexing the key information held in the reception key holding means with reception information of the reception means; information obtained by multiplexing the key information by the key multiplexing means Recording means for recording the recording information; reproducing means for reproducing the recording information of the recording means; reproduction key extracting means for extracting the key information from the reproduction information of the reproducing means; A playback key holding unit that holds the key information extracted by the playback key extraction unit; and a scramble applied to main information included in the playback information of the playback unit, using the key information held by the playback key holding unit. A pay scrambled broadcast receiving / recording / reproducing system, comprising: descrambling means for canceling. 2. The scrambled main information is multiplexed with key information for descrambling the scrambled main information, and the key information is intermittently multiplexed on the main information. In a broadcast reception recording / reproducing system, a receiving unit for receiving the pay scrambled broadcast, a receiving key extracting unit for extracting the key information from the receiving information of the receiving unit, and a latest receiving key extracted by the receiving key extracting unit Reception key holding means for holding key information; key multiplexing means for multiplexing the key information held in the reception key holding means with reception information of the reception means; information obtained by multiplexing the key information by the key multiplexing means Recording means for recording the recording information; reproducing means for reproducing the recording information of the recording means; reproduction key extracting means for extracting the key information from the reproduction information of the reproducing means; A reproduction key holding unit for holding the key information extracted by the reproduction key extraction unit; and a reception key holding unit for scrambling the main information included in the reception information of the reception unit when receiving and viewing the pay scramble broadcast. When the pay scrambled broadcast is played back and viewed, the scramble applied to the main information included in the playback information of the playback means is used as the key information held in the playback key holding means. And a descrambling means for canceling the use of the pay scrambled broadcast. 3. The pay scrambled broadcast receiving / recording / reproducing system according to claim 1, wherein said paying scrambled broadcast receiving contract is currently valid, and said paying scrambled broadcast receiving contract is currently valid. Control means for prohibiting descrambling of the scramble applied to the main information included in the reproduction information of the reproduction means when it is determined that the reception contract of the scramble broadcast is invalid. Reception recording and playback system. 4. The pay scrambled broadcast receiving / recording / reproducing system according to claim 1 or 2, wherein the determining means determines whether or not descrambling of the main information in the received signal of the receiving means can be canceled. Control means for prohibiting the descrambling of scrambling applied to the main information included in the reproduction information of the reproduction means when the release is determined to be impossible. 5. The reception recording / reproducing system for pay scrambled broadcasting according to claim 1, wherein an elapsed time from a point in time when key information is extracted by said reception key extracting means is measured, and the next key information is extracted. A measuring unit that is reset at a point in time, and a control unit that prohibits cancellation of scrambling applied to main information included in reproduction information of the reproducing unit when the elapsed time measured by the measuring unit reaches a predetermined time. And a pay-scramble broadcast reception recording / playback system. 6. A pay scrambled broadcast receiving / recording / reproducing system which multiplexes scrambled main information and key information for canceling the scramble applied to the main information and ancillary information including charge information. Receiving means for receiving the pay scrambled broadcast, using key information in the attached information received by the receiving means,
A descrambling unit for canceling scrambling applied to the main information received by the receiving unit; and a viewing fee for charging for reception and viewing of the pay scrambled broadcast based on fee information in the attached information received by the receiving unit. Means, recording means for recording information received by the receiving means, and charging for recording for charging the recording of the pay scrambled broadcast based on fee information in ancillary information included in the received information recorded by the recording means. Means for receiving, recording and reproducing paid scrambled broadcasts. 7. A pay scrambled broadcast receiving / recording / reproducing system which multiplexes scrambled main information and key information for canceling the scramble applied to the main information and additional information including charge information. Receiving means for receiving the pay scrambled broadcast, using key information in the attached information received by the receiving means,
A descrambling unit for canceling scramble applied to the main information received by the receiving unit; and a viewing fee for charging the reception and viewing of the pay scrambled broadcast based on fee information in the attached information received by the receiving unit. Means, recording means for recording the reception information of the receiving means, and recording charging for charging the recording of the pay scrambled broadcast based on the charge information in the additional information included in the reception information recorded by the recording means. Means, a reproducing means for reproducing the recorded information of the recording means, a reproducing charging means for charging for the program reproduction of the pay scramble broadcast based on the fee information in the attached information included in the reproducing information of the reproducing means; A pay-scramble broadcast reception recording / playback system comprising: 8. One piece of program information is constructed by multiplexing scrambled main information and auxiliary information including key information and charge information for descrambling the main information, and further comprising this program information. In a pay scrambled broadcast receiving / recording / reproducing system in which a plurality of pieces of information are multiplexed, receiving means for receiving the pay scrambled broadcast, and extracting program information arbitrarily selected for viewing from the received information of the receiving means Viewing program information extracting means, and descrambling means for descrambling the scramble applied to the main information included in the program information using key information in the attached information included in the program information extracted by the viewing program information extracting means. Based on the fee information in the attached information included in the program information extracted by the viewing program information extracting means, Viewing charging means for charging for reception and viewing of paid scrambled broadcasts; recorded program information extracting means for extracting program information arbitrarily selected for recording from reception information of the receiving means; and the recorded program information Recording means for recording the program information extracted by the extracting means; and charging for the program recording of the pay scrambled broadcast based on the fee information in the attached information included in the program information extracted by the recorded program information extracting means. A pay-scramble broadcast receiving / recording / reproducing system, comprising: a recording billing unit. 9. Program information is constructed by multiplexing scrambled main information and auxiliary information including key information and fee information for descrambling the scrambled main information. In a pay scrambled broadcast receiving / recording / reproducing system in which a plurality of pieces of information are multiplexed, receiving means for receiving the pay scrambled broadcast, and extracting program information arbitrarily selected for viewing from the received information of the receiving means Viewing program information extracting means, and descrambling means for descrambling the scramble applied to the main information included in the program information using key information in the attached information included in the program information extracted by the viewing program information extracting means. And, based on the fee information in the additional information included in the program information extracted by the viewing program information extracting means, Viewing charging means for charging for reception and viewing of the paid scrambled broadcast; recorded program information extraction means for extracting program information arbitrarily selected for recording from reception information of the reception means; Recording means for recording the program information extracted by the information extracting means; and charging for the recording of the pay scrambled broadcast based on the fee information in the attached information included in the program information extracted by the recorded program information extracting means. A charging unit for recording; a reproducing unit for reproducing the recording information of the recording unit; and a charging for the reproduction of the pay scrambled broadcast based on the fee information in the attached information included in the program information reproduced by the reproducing unit. A receiving / recording / playback system for pay-scrambled broadcasting, comprising: a charging unit for playback. 10. The pay scrambled broadcast receiving / recording / reproducing system according to claim 6, wherein the additional information includes fee information for reception / viewing and recording, and the viewing charging means includes a fee for the reception / viewing. Charging for the reception and viewing of the pay scrambled broadcast based on the information, wherein the recording charging means charges for the recording of the paid scrambled broadcast based on the fee information for recording. Reception recording and playback system. 11. The pay scrambled broadcast receiving / recording / reproducing system according to claim 7, wherein the auxiliary information in the program information includes fee information for reception / viewing, recording, and playback / viewing. The charging unit charges the reception and viewing of the pay scrambled broadcast based on the reception / viewing fee information, and the recording charging unit charges the recording of the paid scrambled broadcast based on the recording fee information. A pay-scramble broadcast receiving / recording / reproducing system, wherein the reproduction charging means charges the reproduction of the pay-scramble broadcast based on the reproduction / viewing fee information.