JPH099241A - Scramble broadcasting system, scrambling method, scrambling device and descrambling device - Google Patents

Abstract

PURPOSE: To control viewing regardless of the contract form of pay broadcasting. CONSTITUTION: A ciphered contract key corresponding to a prescribed program is included in individual information and supplied from a broadcasting supply side to a reception terminal beforehand and the contract key is decoded by an individual key intrinsic to the reception terminal by a first decoder 23 in the reception terminal. When a prescribed operation is performed to the reception terminal, a scramble key in program information added to the program 15 decoded by using the decoded contract key in a second decoder 22 and is supplied to a descrambler 21 and the program is descrambled in the descrambler 21. Also, to the broadcasting supply side, it is informed that the program is viewed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scramble broadcasting system, a scramble method, a scramble apparatus, and a descramble apparatus. For example, a scramble broadcasting system suitable for use in a pay broadcasting system,
And a scramble method, a scramble device, and a descramble device.

[0002]

2. Description of the Related Art In pay broadcasting, a broadcasting system called scramble broadcasting is often used. In this scrambled broadcast, the broadcast station intentionally disturbs the original signal by a predetermined method, so that even if a person who does not have a contract with the broadcast station receives the broadcast, normal image, sound, data, etc. It makes it impossible to use. That is, the decoder of the person who has contracted with the broadcasting station is provided with a key signal for descrambling this, and the decoder descrambles the scrambled data to the original form by this key signal to obtain a normal image. , Voice, and data so that you can get. The case of contracting on a channel basis is called flat, and the case of being charged according to the program viewed is called pay-per-view. Of the pay-per-view, even if a viewer suddenly wants to watch a predetermined program, he / she can watch the program simply by performing a predetermined operation, which does not require prior notification, is called an impulse pay-per-view.

[0003]

[Problems to be Solved by the Invention] As a control method for pay broadcasting, "Question No. 17" Technical conditions for pay system in television broadcasting by broadcasting satellite "in" Proposal by Telecommunications Technology Council "in 1988. Is well known. However, in this 17th report,
Although a tentative framework of the above technical conditions is specified, a specific control procedure and a method for realizing impulse pay-per-view were not specified.

Further, for example, an effective method for preventing illegal viewing of a high-priced program such as a new movie or a title match, or a method of immediately collecting viewing information has not been proposed.

In recent years, MPEG2 (Moving Pic)
pure Experts Group Phase
Video / audio compression methods such as 2) have been established, and digitized video / audio signals can now be transmitted at low bit rates. As a result, a situation has become possible in which digital broadcasting in which multi-channel video / audio is multiplexed can be realized by the conventional transmission path for transmitting one channel of analog broadcasting.

However, the above-mentioned No. 17 report was examined for conventional analog broadcasting, and there was a problem that it was not suitable for multi-channel control.

The present invention has been made in view of such a situation. Even a program for which a viewing contract has not been subscribed can be viewed in pay-per-view with a simple operation, and illegal viewing can be performed. In addition to suppressing the above, the viewing information can be promptly collected.

[0008]

In the scramble broadcasting system according to claim 1, a scrambled program of a predetermined channel transmitted from the broadcast supply side is received by a receiving terminal on the viewer side and received. In a scramble broadcasting system for descramble the program, a broadcast supply side, an encryption means for encrypting scramble information for descramble the scrambled program,
Addition means for adding the encrypted scramble information and program type information indicating whether or not the program is a special program to the program, and decryption information for decoding the scramble information encrypted by the encryption means. , And output means for outputting predetermined contract information corresponding to the contract form, and control means for controlling whether or not the decryption information from the output means and the contract information are supplied to the receiving terminal. The terminal stores a storage unit for storing the decoding information and contract information from the broadcast supply side, an extraction unit for extracting the scramble information added to the program from the broadcast supply side, and a scramble information in the storage unit. Decoding means for decoding based on the stored decoding information, instructing means for instructing whether or not to descramble a program, and based on program type information A determination unit that determines whether or not the program is a special program, and the program that has been decrypted by the decryption unit based on the instruction content of the instruction unit, the contract information, and the determination result of the determination unit. It is characterized by further comprising: determining means for determining whether or not to descramble by using the scramble information, and providing means for providing the broadcast supply side with predetermined viewing information regarding the program instructed by the instructing means.

The decoding information assigned to the special program may be different from the decoding information assigned to the other programs.

It is possible to assign the decoding information common to the plurality of special programs, which is different from the decoding information assigned to the other programs.

The special program of a plurality of channels may be assigned the common decoding information different from the decoding information assigned to the other programs.

According to a fifth aspect of the present invention, in the scramble method of transmitting a scrambled program of a predetermined channel to a receiving terminal on the viewer side, scramble information for descramble the scrambled program is encrypted. The encrypted scramble information and the program type information indicating whether or not the program is a special program, and the decryption information for decrypting the encrypted scramble information, and the contract form. It is characterized in that corresponding predetermined contract information is output, and whether or not the output decryption information and the contract information are supplied to the receiving terminal is controlled.

The decoding information assigned to a special program may be different from the decoding information assigned to another program.

It is possible to assign the decoding information common to the plurality of special programs, which is different from the decoding information assigned to the other programs.

It is possible to assign the decoding information common to the special program of a plurality of channels, different from the decoding information assigned to the other programs.

According to a ninth aspect of the present invention, in the scrambler for transmitting a scrambled program of a predetermined channel to a receiving terminal on the viewer side, the scrambler encrypts scramble information for descrambling the scrambled program. Encryption means for encrypting, the encrypted scramble information, addition means for adding program type information indicating whether the program is a special program to the program, and the encryption means encrypted by the encryption means. Decoding information for decoding the scramble information and output means for outputting predetermined contract information corresponding to the contract form, and controlling whether or not the decoding information from the output means and the contract information are supplied to the receiving terminal And a control means.

The decoding information assigned to the special program may be different from the decoding information assigned to the other programs.

It is possible to assign the decoding information common to the plurality of special programs, which is different from the decoding information assigned to the other programs.

The special program of a plurality of channels may be assigned the common decoding information different from the decoding information assigned to the other programs.

The descrambling device according to a thirteenth aspect receives a scrambled program of a predetermined channel transmitted from the broadcast supply side at a receiving terminal on the viewer side,
In a descrambling device that descrambles the received program, a storage unit that stores the decoding information and contract information from the broadcast supply side, and an extraction that extracts the scramble information added to the program from the broadcast supply side Means, decoding means for decoding scramble information based on the decoding information stored in the storage means, instruction means for instructing whether or not to descramble the program, and the program based on the program type information. Based on the determination means for determining whether is a special program, the content of the instruction by the instruction means, the contract information, and the determination result of the determination means,
Providing means for deciding whether or not to descramble the program using the scramble information decoded by the decoding means, and providing predetermined broadcast information regarding the program instructed by the instructing means to the broadcast supply side And means.

The decoding information assigned to the special program may be different from the decoding information assigned to the other programs.

It is possible to assign the decoding information common to the plurality of special programs, which is different from the decoding information assigned to the other programs.

The special program of a plurality of channels may be assigned the common decoding information different from the decoding information assigned to the other programs.

[0024]

In the scrambled broadcasting system according to claim 1, on the broadcast supply side, by the encryption means,
Scramble information for descrambling the scrambled program is encrypted, and the encrypted scramble information and program type information indicating whether the program is a special program are added to the program. Also,
The control unit controls whether or not the decryption information for decrypting the encrypted scramble information output from the output unit and the predetermined contract information corresponding to the contract form are supplied to the receiving terminal. On the other hand, in the receiving terminal, the storage means stores the decoding information and the contract information from the broadcast supply side, the extraction means extracts the scramble information added to the program from the broadcast supply side, and the decoding means
The scramble information is decoded based on the decoding information. The instruction means gives an instruction as to whether or not the program is descrambled, and the decision means decides whether or not the program is a special program based on the program type information. The instruction content by the instruction means, the contract information, and the decision Based on the determination result of the means, the determining means determines whether to descramble the program by using the scramble information, and the providing means provides the broadcast supply side with predetermined viewing information regarding the program instructed by the instructing means. Provided. Therefore, regardless of the contract form, it is possible to broadcast a predetermined special program and view it in pay-per-view.

In the scrambling method according to claim 5, the scramble information for descramble the scrambled program is encrypted, and the encrypted scramble information and whether the program is a special program or not are shown. Whether the program type information is added to the program, the decryption information for decrypting the encrypted scramble information and the contract information corresponding to the contract form are output, and the output decryption information and the contract information are supplied to the receiving terminal. Is controlled. Therefore, the method of transmitting the decoding information to the receiving terminal can be changed depending on the program.

In the scramble device according to the ninth aspect, the scramble information for descramble the scrambled program is encrypted by the encrypting means, and the scramble information encrypted by the adding means,
And program type information indicating whether the program is a special program is added to the program, the output unit outputs the decoding information for decoding the scramble information, and the contract information corresponding to the contract type, and the control unit outputs the decoding information. It is controlled whether or not the decryption information from the output means and the contract information are supplied to the receiving terminal. Therefore, the method of transmitting the decoding information to the receiving terminal can be changed depending on the program.

In the descrambling device according to the thirteenth aspect, the storage means stores the decoding information and the contract information from the broadcast supply side, and the extraction means scramble information added to the program from the broadcast supply side. And the program type information is extracted, and the scrambling information is decoded by the decoding means based on the decoding information. The instruction means gives an instruction as to whether or not the program is descrambled, and the decision means decides whether or not the program is a special program based on the program type information. The instruction content by the instruction means, the contract information, and the decision Based on the determination result of the means, the deciding means decides whether or not the program is descrambled using the scramble information, and the providing means provides the predetermined viewing information regarding the program instructed by the instructing means to the broadcast supply side. Provided to. Therefore, a predetermined special program can be viewed in pay-per-view regardless of the contract form.

[0028]

1 is a block diagram showing the configuration of an embodiment of a pay broadcasting system to which the present invention is applied. The encoder 1 of the transmission side system is adapted to digitize and compress video signals and audio signals. The multiplexer 2 (addition means) time-division-multiplexes a plurality of encoder outputs and a plurality of related information. Here, the related information includes “program information” including information about programs and a scramble key for descrambling, contract information for each subscriber (viewer) (for example, contract form such as flat or pay-per-view), and common information. It shall consist of "individual information" including the contract key for decryption.

The scrambler 3 selectively scrambles a predetermined one of the output signals from the multiplexer 2 with a scramble key from a related information transmitting device 4 (encoding means) described later. ing.

Scramble control system 6 (output means,
The control means) supplies the contract key to the related information transmitting device 4, encrypts the contract key with the individual key unique to the receiving terminal, and supplies the contract key to the multiplexer 2 as a part of the individual information. .

The related information transmitting device 4 supplies the scramble key to the scrambler 3, encrypts the scramble key with the contract key supplied from the scramble control system 6, and multiplexes it as a part of common information (program information). It is designed to be supplied to the chemical converter 2.

The program control system 5 generates a predetermined control signal and controls the encoder 1 according to the program. That is, the method of digitization and compression is controlled. Also, now
A program ID of a program encoded by the encoder 1 and a channel ID of a corresponding channel are generated and supplied to the related information transmitting device 4. The viewing information collection processing system 7 uses the viewing information (eg, the channel I corresponding to the viewed program) that is uplinked from a large number of receiving terminals.
D, and viewing time, etc.) and the contract request from the viewer are processed, and the scramble control system 6 is used as contract information.
To be supplied.

On the other hand, the decoder 8 (extracting means) of the receiving terminal
Is designed to descramble the scrambled signal to the original signal by the scramble key supplied from the security module 9 (storage means, determination means, determination means, provision means) described later by the built-in descrambler. There is. Further, the individual information and the program information added to the program are extracted and output.

The security module 9 is, for example, an IC
It is composed of a card etc. and stores an individual key unique to the terminal,
The non-scrambled individual information supplied via the decoder 8 is fetched, the individual information is decrypted by the individual key, and the contract key and the contract information are respectively extracted and stored.
Further, the common information associated with the program supplied via the decoder 8 is fetched, the common information is decrypted by the contract key, the scramble key is fetched, and supplied to the decoder 8.

Next, the operation will be described. First, the operation when the individual information is transmitted from the transmitting system to the receiving terminal will be described. As shown in FIG. 2, this individual information includes the contract key number corresponding to the contract key, the contract key, the channel ID corresponding to the contracted channel, and the contract type. The individual information also includes information corresponding to the ID number of the receiving terminal that is the transmission destination.

The contract key is transmitted together with, for example, an 8-bit contract key number, and a plurality of contract keys can be selectively used. The contracted channel ID is represented by, for example, 16-bit Service_id. The contract type can identify flat, pay-per-view, and special contract, and is, for example, 4 bits.

The individual information is encrypted in the scramble control system 6 by using a unique key unique to the receiving terminal to which the individual information is to be transmitted. The scramble control system 6 stores, for all the receiving terminals, an individual key unique to the receiving terminal in association with the ID number of the receiving terminal, and retrieves the individual key from the ID number of the receiving terminal of the transmission destination. You can do it. Therefore, the individual key corresponding to the ID number of the destination receiving terminal is searched, and the individual information is encrypted based on that. The encrypted individual information is supplied to the multiplexer 2.

In the multiplexer 2, the digitized and compressed video and audio signals corresponding to the predetermined program supplied from the encoder 1 and the individual information supplied from the scramble control system 6 are time division multiplexed. After being
It is supplied to the scrambler 3. In the digital signal supplied to the scrambler 3, only the program part is scrambled using the scramble key supplied from the related information sending device 4, and the individual information part is sent to the transmission line 10 without being scrambled.

The transmission of the individual information to the receiving terminal is carried out at any time when the individual information needs to be updated, if necessary. This individual information includes the contract information described above.

Next, an operation when a normal program and program information (components of common information) added thereto are transmitted from the transmitting system to the receiving terminal will be described.

The program information is, for example, as shown in FIG. 3, the contract type, the contract key number indicating the contract key number, the encrypted scramble key, and the Serv corresponding to the channel ID.
It contains an ice_id, a program ID for identifying the program, and the like. Further, the contract type includes a flag for identifying whether or not it is a special program.

The predetermined program information having the above-mentioned configuration generated in the related information transmitting device 4 is encrypted by the contract key supplied from the scramble control system 6 and then supplied to the multiplexer 2. In the multiplexer 2, the digitized and compressed video signal and audio signal corresponding to the predetermined program supplied from the encoder 1;
The program information supplied from the related information transmitting device 4 is time-division multiplexed and supplied to the scrambler 3.

In the scrambler 3, a digital signal obtained by time-division-multiplexing the compressed video signal and audio signal constituting the program supplied thereto and the program information is supplied from the related information sending device 4 with the scramble key. By the above, only the program portion is scrambled, and the program information portion is sent to the transmission line 10 without being scrambled.

In this way, the predetermined program and the program information associated with it are transmitted from the transmitting side system to the receiving terminal.

Next, the operation on the receiving terminal side will be described.

FIG. 4 is a diagram for explaining the basic operation of the receiving terminal when the viewing permission is controlled.
The decoder 8 is composed of, for example, a descrambler 21, a second decoder 22 (decoding means), and a first decoder 23.

Individual information is transmitted to the receiving terminal of the viewer who has formally contracted. From the transmission side system, the transmission line 10
A predetermined scrambled program sent via
When the receiving terminal receives the digital signal in which the unscrambled individual information is time-division multiplexed, the digital signal corresponding to the scrambled program is supplied to the descrambler 21.

On the other hand, for the unscrambled individual information, first, the ID number of the receiving terminal added to the non-encryption part of the individual information is compared with the ID number of the receiving terminal stored in advance in the security module 9. If they match, the data is supplied to the first decoder 23.

The individual information supplied to the first decoder 23 is
The contract key and contract information are decrypted by the individual key stored in the security module 9 and unique to the receiving terminal, supplied to the security module 9, and stored therein. This contract key is used to decrypt the program information described later. Further, the contract information is used when determining whether the received program is a contracted program.

When the viewer is viewing the program at the receiving terminal, the receiving terminal receives the predetermined scrambled program transmitted via the transmission line 10 and the program information accompanying it. . The descrambler 21 outputs the digital signal corresponding to the scrambled predetermined program.
Program information supplied to the second decoder 2
2 is supplied.

When the contract key corresponding to the channel of the predetermined program is extracted from the individual information already decrypted by the first decryptor 23 and stored in the security module 9 as described above, the second decryption is performed. The device 22 operates and the program information is decrypted by the contract key supplied from the security module 9. After the program information is decrypted, the scramble key included in the program information is taken out.

Next, the program information is read by the security module 9 and collated with the contract information already stored. As a result, when the program to which the program information is added is recognized as the contracted program, the scramble key obtained by the second decoder 22 is supplied to the descrambler 21. In the descrambler 21, the scrambled digital signal of the predetermined program is descrambled by the scramble key supplied from the second decoder 22, is returned to the original signal that can be normally viewed, and then is output. .

When a predetermined channel is contracted flat, individual information including contract key corresponding to the contracted channel, service_id corresponding to the channel, contract information such as contract type and the like is transmitted from the transmitting side system to the receiving terminal. , Are stored in the security module 9 that constitutes the receiving terminal. If the number of contracted channels is large, the above-mentioned procedure will be repeatedly executed.

In the case of flat viewing, the Service_id in the program information associated with the received program is stored in the security module 9, and the contract key indicated by the contract key number in the program information is stored in the security module 9. Yes, and if the contract type corresponding to Service_id is flat, the program information is decrypted by the second decoder 22, the obtained scramble key is supplied to the descrambler 21, and the descrambler 21 operates. As a result, a video and audio in which a predetermined program is normally descrambled can be obtained, and the program can be viewed.

In the case of a pay-per-view contract,
Individual information including the contract key corresponding to the contracted channel, the Service_id corresponding to the channel, and the contract type is transmitted from the transmitting side system to the receiving terminal, supplied to the security module 9 via the decoder 8 and stored therein. If you have many channels to subscribe to,
This procedure will be repeated.

Even when a flat contract is made, when viewing a high-priced special program by operating pay-per-view, if the special program is viewed from the transmission side system to the receiving terminal. Service key corresponding to contract key and special program channel for permission
Individual information including the id and the contract type indicating the special contract is transmitted. This individual information is supplied to the security module 9 and stored therein. If there are a large number of special programs and each one is assigned an individual contract key, this procedure will be repeated.

For high-priced special programs, it is often the case that the program provider desires prompt billing of viewing fees and prompt collection of ratings. In the normal pay-per-view method, for example, monthly viewing information is collected from the security module 9 on the receiving terminal side, and a monthly pay-per-view fee is calculated from the result. Therefore, it is not possible to promptly collect viewing charges for special programs.

Therefore, by telephone contact or by operating the receiving terminal, only the viewer who has contacted the transmitting system in advance that he / she wants to watch the predetermined special program is previously informed. Send the contract key corresponding to the special program. As a result, the viewer who has contacted in advance can view the special program by performing the same operation as in the pay per view. in this case,
Since the transmission side system recognizes the viewers who have contacted in advance, it is possible to quickly grasp the audience rating and to perform the billing process for these persons. In addition, since the contract key is transmitted only to the viewer who has contacted in advance, it is possible to reduce the possibility that the contract key is illegally decrypted.

On the other hand, viewers who have not contacted in advance
Since the contract key for viewing the special program has not been received from the transmitting system, the special program cannot be viewed.

Further, even if a special program is requested to be viewed by prior contact, it can be canceled by contacting the transmitting system before the start of the program. For example, when the viewer informs the sender system of cancellation of the application for viewing a specific special program by telephone contact or operating the receiving terminal, the sender system receives the special notification based on the notification from the viewer. In order to delete the contract key for the program, the individual information including the predetermined information is transmitted again to the receiving terminal on the viewer side via the transmission line 10.

For example, a dedicated flag indicating cancellation of reservation may be prepared in the individual information, but the contract key in the individual information has a value of 0000000000000000.
It is also possible to set 00 (hexadecimal number) and allocate this for cancellation and use it. In this case, the transmitting system will transmit the individual information as shown in FIG. 5 to the receiving terminal. When the receiving terminal receives the individual information from the transmitting side system, it recognizes that the value set in the contract key therein is 0000000000000000 (hexadecimal number), and the predetermined program corresponding to the contract key number can be viewed. It recognizes that the cancellation has been made by the viewer, and deletes the contract key number and the contract key corresponding thereto, which are already stored in the security module 9.

As a result, even when the special program is transmitted, the contract key number in the program information transmitted together with the special program and the contract key corresponding thereto do not exist in the security module 9, and the viewing The receiving terminal of the viewer cannot descramble the special program, and the viewer cannot watch the special program.

When a large number of viewers request the sender system at the same time to request advance viewing of a predetermined program, there is a possibility that the reception processing of the sender system may be delayed by the start time of the program. In addition, if a large number of applications are generated immediately before the start of the program, it is necessary to transmit a large amount of individual information in a short time, and there is a risk that the start time of the program will be missed.

Therefore, not only the viewers who have contacted in advance, but also other viewers, that is, all viewers, are sent in advance by including the contract key of the special program in the individual information in advance. Try to keep it. The receiving terminal receiving this individual information stores the contract key of the special program in the security module 9 together with the contract key number. Therefore, all receiving terminals that have received the special program have already stored the contract key corresponding to the contract key number of this special program in the security module 9.

On the other hand, on the receiving terminal side, when the viewer makes a prior contact by operating the receiving terminal, the information that the prior contact is made is stored in the security module 9 together with the requested channel ID and program ID. Try to remember it. Upon receiving the special program, the receiving terminal recognizes that it is the special program by the contract type in the program information transmitted together with the special program. In this case, the contract key corresponding to the contract key number of the special program is already stored in the security module 9, but if the receiving terminal is the special program, the channel stored together with the information that the advance contact has been made is stored. ID,
And the program ID are Service_i in the program information.
It is determined whether or not they match the d and the program ID, respectively, and only when they match, the scramble key in the program information is supplied to the descrambler 21 to descramble the transmitted special program. As a result, only the viewer who made the contact in advance can view the special program.

As a result, even if the application floods immediately before the start of the program, it is not necessary to send a large amount of individual information to the receiving terminal in a short time, and the inconvenience of being late for the program start time can be eliminated. In addition, it is possible to promptly perform the billing process for the viewer who has contacted in advance.

Here, if the viewer cancels the reservation for viewing the program, that is, if the user gives an instruction to cancel the reservation for the predetermined program by operating the receiving terminal,
The receiving terminal transmits a predetermined signal corresponding to the cancellation of the reservation to the transmitting system via the telephone line 11, and deletes the channel ID and the program ID of the reserved program already stored in the security module 9. . As a result, the receiving terminal cannot view the program for which the reservation is canceled.

In multi-channel digital broadcasting, if there are many special programs as described above, it is possible to assign different contract keys to each other, but in that case, it is possible to receive them from the transmitting side system. The number of individual information items transmitted to the terminal increases. Therefore, by using a common contract key for a plurality of special programs, it is possible to suppress an increase in the number of individual information items transmitted to the receiving terminal. Further, it is possible to further shorten the time required until all the necessary individual information is taken into the security module 9 and stored.

Also, by assigning a common contract key to a plurality of special programs even among a plurality of channels, it is possible to suppress an increase in the number of individual information items.
In this case, since the channel ID cannot be specified, the value 0000 (hexadecimal number) indicating unspecified is assigned to the Service_id transmitted together with the contract key. On the receiving terminal side, Service_i
The contract key in which the value 0000 (hexadecimal number) is set in d is used for the special program of the corresponding contract key number regardless of the channel ID.

[0070] The program can be viewed after the necessary individual information is taken in and stored in the security modules 9 of all the receiving terminals in advance. There is. As described above, the program information transmitted along with the program includes the encrypted scramble key, the contract key number indicating the contract key number corresponding thereto, and the Servi corresponding to the channel ID.
ce_id and a flag (included in the contract type) for identifying whether or not it is a special program are included.

Next, a method of performing viewing control by changing the mode of transmitting the contract key for decrypting the scramble key according to the viewing mode will be described.

For flat viewing, the Service_id in the program information associated with the received program is stored in the security module 9, and the contract key indicated by the contract key number in the program information is the security module 9.
When the contract type stored in the service and corresponding to Service_id is flat, the scramble key is decrypted and supplied to the descrambler 21, and the descrambler 21 is operated. In the descrambler 21,
The scrambled video / audio signal corresponding to a predetermined program supplied from the transmission system is descrambled to obtain the original video / audio signal, and the program can be viewed.

In the case of pay-per-view viewing, the Service_id in the program information associated with the received program is stored in the security module 9, and the contract key indicated by the contract key number in the program information is stored in the security module 9. And the Service_id
When the contract type corresponding to is a pay-per-view, the program can be viewed by performing a pay-per-view operation such as pressing a "pay confirmation" button 12 (instructing means) provided on the receiving terminal.

When the pay-per-view operation is performed, the viewing history including, for example, the channel ID of the viewed program, the program ID, and the viewing time is stored in the security module 9 each time. The viewing information stored in the security module 9 is transmitted to the transmission side system via the telephone line 11 at a predetermined cycle, for example, every month.
The transmission-side system performs a billing process for each receiving terminal based on the viewing information transmitted from the receiving terminal.

In the case of watching a special program, the Service_id in the program information associated with the received program is stored in the security module 9, and the contract key indicated by the contract key number in the program information is in the security module 9. Stored in, and the contract type in the program information indicates that it is a special program, that is, when a flag indicating that it is a special program is set, the same as in the case of the pay-per-view described above. By performing the operation, the special program can be viewed. In this case, the individual information from the sending system
The Service_id corresponding to the special program, the contract key number, and the contract key corresponding thereto are transmitted to the receiving terminal and are already stored in the security module 9.

As described above, it is possible to view the special program by performing the same operation as in the pay-per-view even without prior notice. In this case, the viewing history is transmitted to the transmission side system at a predetermined cycle, for example, every month, as in the case of normal pay-per-view. Therefore, in this case, the transmission side system, even for a special program, carries out the charging process in a predetermined cycle as in the case of a normal program.

When the special terminal is operated so as not to be viewed without prior notice, the receiving terminal
Channel I in the program information associated with the received special program
It is determined whether or not D and the program ID respectively match the channel ID and the program ID stored in the security module 9, and if it is determined that they do not match, the scramble key included in the program information is stored in the desk. It is controlled so as not to supply to the rambler 21. as a result,
You will not be able to watch this special program.

On the other hand, when it is determined that the channel ID and the program ID in the program information accompanying the received special program match the channel ID and the program ID stored in the security module 9, respectively, the program information The scramble key included in the descrambler 21
Is controlled so as to be supplied. As a result, this special program can be viewed.

Here, the channel ID and the program ID stored in the security module 9 are stored when the viewer operates the receiving terminal to pre-register for the reservation of the viewing of a predetermined special program. It is a thing. At that time, the signal corresponding to this advance application is also transmitted to the transmitting system. Therefore, in the transmitting system, it is possible to carry out a prompt billing process for the prior contact person.

When the contract key for a special program is shared by a plurality of channels, the above-mentioned special program viewing is performed by using the Service_id in the program information attached to the program received by the receiving terminal.
Is not stored in the security module 9,
When the contract key corresponding to the contract key number in the program information is stored in the security module 9 and the contract type in the program information is flagged as a special program, as in the case of pay-per-view The special program can be viewed by performing the operation of.

As described above, according to the present invention, the contract key,
Depending on the service_id and contract type transmission mode,
It is possible to perform unified control of flat, impulse pay-per-view, special programs, and call-ahead pay-per-view that enables viewing only to pre-registrants.

In the above embodiment, the individual information is supplied to the receiving terminal by broadcasting radio waves, but it is supplied to the receiving terminal by transmission via a telephone line or by an IC card or other recording medium. It is also possible to do so.

In the above embodiment, the transmission line 10
However, the present invention is not limited to this, and it is also possible to use an optical fiber cable or another transmission medium.

Further, in the above embodiment, as an example, the contract type is 4 bits, the contract key number is 8 bits, the contract key and the scramble key are 64 bits, and the Service is
Although 16 bits are assigned to the e_id and the program ID, the present invention is not limited to this, and it is possible to assign any other number of bits.

[0085]

According to the scramble broadcasting system of the first aspect, on the broadcast supply side, the scramble information for descrambling the scrambled program is encrypted and encrypted by the encryption means. The scramble information and the program type information indicating whether the program is a special program are added to the program by the adding means. Further, the control means controls whether or not the decryption information for decrypting the encrypted scramble information and the predetermined contract information corresponding to the contract form are supplied to the receiving terminal. On the other hand, in the receiving terminal, the scramble information added to the program from the broadcast supply side is extracted by the extracting means,
The scrambling information is decoded by the decoding means based on the decoding information. The instruction means gives an instruction as to whether or not the program is descrambled, and the decision means decides whether or not the program is a special program based on the program type information. The instruction content by the instruction means, the contract information, and the decision Based on the determination result of the means, the determining means determines whether to descramble the program using the scramble information,
Since the information about the program instructed by the instructing means is provided to the broadcast supply side by the providing means, it is possible to broadcast a predetermined special program and make it be viewed in pay-per-view regardless of the contract form. Further, by pre-listening the viewing of the program, the broadcast supply side can quickly collect the viewing information. Further, by supplying the decryption information only to the person who reserved the viewing of the program, it becomes possible to suppress the unauthorized viewing.

According to the scramble method according to claim 5 and the scramble device according to claim 9, the scramble information for descramble the scrambled program is encrypted, and the encrypted scramble information, and Whether the program type information indicating whether or not the program is a special program is added to the program, the decryption information for decrypting the encrypted scramble information, and the predetermined contract information corresponding to the contract form are supplied to the receiving terminal. Since it is controlled, the method of transmitting the decoding information to the receiving terminal can be changed depending on the program. Therefore, the decoding information of the program can be supplied only to the person who reserved the viewing of the program in advance. This makes it possible to prevent unauthorized viewing.

According to the descrambling device of the thirteenth aspect, the scrambling information added to the program from the broadcast supply side is extracted by the extracting means, and the instructing means indicates whether to descramble the program. Based on the program type information, the determining means determines whether or not the program is a special program. Based on the instruction content of the instructing means, the contract information, and the determination result of the determining means, the determining means determines the program. Since it is determined whether to descramble by using the scramble information decoded by the decoding information, and the provision means provides the broadcast supply side with predetermined viewing information regarding the program instructed by the instructing means. Regardless of the type of contract, you can watch a specific special program in pay-per-view. Further, by pre-listening the viewing of the program, the viewing information can be promptly provided to the broadcast supply side. Also, by ensuring that the decoding information is supplied only to those who have booked to view the program,
Unauthorized viewing can be suppressed.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration example of a pay broadcasting system to which the present invention is applied.

FIG. 2 is a diagram showing a part of individual information.

FIG. 3 is a diagram showing a part of program information.

FIG. 4 is a diagram for explaining the operation principle of the receiving terminal.

FIG. 5 is a diagram showing a part of individual information transmitted when a program is canceled.

[Explanation of symbols]

1 Encoder 2 Multiplexer (Adding Means) 3 Scrambler 4 Related Information Sending Device (Encrypting Means) 5 Program Control System 6 Scrambling Control System (Output Means, Control Means) 7 Viewing Information Collection Processing System 8 Decoder (Extraction Means) 9 Security Module (Storage Means, Judging Means, Determining Means, Providing Means) 10 Transmission Line 11 Telephone Line 21 Descrambler (Instructing Means) 22 Second Decoder 23 First Decoder

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kiichi Ihara 6-735 Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Corporation

Claims (16)

[Claims] 1. A scramble broadcasting system in which a scrambled program of a predetermined channel transmitted from a broadcast supply side is received by a receiving terminal on the viewer side and the received program is descrambled, wherein the broadcast supply side The encryption means for encrypting scramble information for descramble the scrambled program, the encrypted scramble information, and the program type information indicating whether the program is a special program or not. Addition means for adding to the program, decryption information for decrypting the scramble information encrypted by the encryption means, output means for outputting predetermined contract information corresponding to the contract form, and the decryption from the output means Information and control means for controlling whether or not to supply the contract information to the receiving terminal. A terminal stores the decoding information and contract information from the broadcast supply side, a storage unit that extracts the scramble information added to the program from the broadcast supply side, and the scramble information. Decoding means for decoding based on the decoding information stored in the storage means, instruction means for instructing whether or not to descramble the program, and the program is a special program based on the program type information. Descrambling using the scrambling information decrypted by the decrypting means based on the determination means for determining whether or not the instruction content, the contract information, and the determination result by the determining means. Determining means for deciding whether or not to perform, and providing predetermined broadcast information regarding the program instructed by the instructing means to the broadcast supply side. A scramble broadcasting system comprising: a providing unit. 2. The scramble broadcasting system according to claim 1, wherein the decoding information assigned to the special program is different from the decoding information assigned to another program. 3. The decoding information, which is different from and common to the decoding information assigned to the other programs, is assigned to the plurality of special programs.
The scrambled broadcasting system described in. 4. The scramble broadcasting system according to claim 1, wherein the decoding information common to the special programs of a plurality of channels is different from the decoding information allocated to the other programs. . 5. A scramble method for transmitting a scrambled program of a predetermined channel to a receiving terminal on a viewer side, wherein scramble information for descramble the scrambled program is encrypted, and the encrypted scramble is performed. Information and program type information indicating whether or not the program is a special program are added to the program, and decryption information for decrypting the encrypted scramble information and predetermined contract information corresponding to the contract form are output. Then, the scrambling method is characterized by controlling whether or not the output decryption information and the contract information are supplied to the receiving terminal. 6. The scrambling method according to claim 5, wherein the decoding information assigned to the special program is different from the decoding information assigned to the other programs. 7. The decoding information, which is different from and common to the decoding information assigned to the other programs, is assigned to a plurality of the special programs.
The scramble method described in. 8. The scrambling method according to claim 5, wherein the special program of a plurality of channels is assigned the common decoding information different from the decoding information assigned to the other programs. 9. A scramble device for transmitting a scrambled program of a predetermined channel to a receiving terminal on the viewer side, and an encryption means for encrypting scramble information for descramble the scrambled program, Adding means for adding to the program the scramble information that has been encrypted and program type information that indicates whether the program is a special program, and decryption information that decrypts the scramble information encrypted by the encryption means. , And output means for outputting predetermined contract information corresponding to the contract form, and control means for controlling whether or not the decryption information from the output means and the contract information are supplied to the receiving terminal. Scrambling device. 10. The scrambler according to claim 9, wherein the decoding information assigned to the special program is different from the decoding information assigned to the other programs. 11. The scramble device according to claim 9, wherein the plurality of special programs are assigned the common decoding information different from the decoding information assigned to the other programs. 12. Unlike the decoding information assigned to other special programs for the special program of a plurality of channels,
10. The scrambler according to claim 9, wherein the common decoding information is assigned. 13. A descramble device for receiving a scrambled program of a predetermined channel transmitted from a broadcast supply side on a receiving terminal on a viewer side and descrambling the received program, wherein: Storage means for storing the decryption information and contract information of, the extraction means for extracting the scramble information added to the program from the broadcast supply side, and the decryption for storing the scramble information in the storage means. Decoding means for decoding based on information, instructing means for instructing whether or not to descramble the program, and determining means for determining, based on the program type information, whether or not the program is a special program And, based on the content of the instruction by the instruction means, the contract information, and the determination result of the determination means, the program by the decoding means. It is characterized by further comprising: deciding means for deciding whether to descramble by using the decrypted scramble information and providing means for providing the broadcast supply side with predetermined viewing information regarding the program instructed by the instructing means. Descramble device. 14. The descrambling device according to claim 13, wherein the decoding information assigned to the special program is different from the decoding information assigned to another program. 15. The descrambling device according to claim 13, wherein the plurality of special programs are assigned the common decoding information different from the decoding information assigned to the other programs. 16. Unlike the decoding information assigned to other special programs for the special program of a plurality of channels,
The descrambling device according to claim 13, wherein the common decoding information is assigned.