JPH0951520A - Device and method for descrambling, scrambled broadcast transmitter/receiver, and scrambled broadcasting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable charging in conformity with viewer's use information by performing a descrambling processing of information which is decided to be reception-contracted and scrambled according to extracted information. SOLUTION: A decoder decides whether an (i)th bit of Component-map 1 is 1 and an (i)th bit of Component-map 2 is 1. When the bit of Component-map 1 is '0' its information is scrambled, so a viewer can uses it irrelevantly to whether or not a contact is made. When the bit of Component-map1 is '1', this means that the information is scrambled, so when the viewer makes a contract for the program, namely, only when the bit of Component-map 2 is '1', the information is descrambled, but when no contract is made, the information is not descrambled.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a descrambling device, a scrambling method, a scramble broadcast transmitting / receiving device,
The present invention relates to a scramble broadcasting method, and particularly to a descramble apparatus, a descramble method, a scramble broadcast transmitting / receiving apparatus, and a scramble broadcast, which are suitable for scramble broadcasting in which a viewing contract is selectively made for each piece of information of a program including a plurality of pieces of information. Regarding the method.

[0002]

2. Description of the Related Art In recent years, MPEG2 (Moving Picture Exp)
Video and audio compression methods such as erts Group Phase 2) have been established, and digitized video and audio can be transmitted at a low bit rate. As a result, it has become possible to transmit more information than ever before using existing transmission lines.

In response to such a trend, the pay broadcasting system is becoming multi-channel, and more programs can be transmitted through more channels than ever before.

By the way, the viewing modes of the pay broadcasting system are roughly classified into (a) flat viewing in which a contract is made for each channel (b) pay per view viewing in which a fee is paid according to the viewed program There are two. In addition, in order to view pay-per-view, (b-1) Call Ahead Pay-per-view which informs the sender in advance that the program will be watched
View) Viewing (b-2) Impulse Pay Per-view (Impulse Pay) without the need to notify the sender in advance to watch the program
per View) There are two views.

Now, even if the number of programs received by the viewer increases as described above, the viewer does not always watch all the programs. Therefore, as the number of programs increases, the number of programs that are not viewed increases. Considering this point, it can be said that the pay-per-view viewing, in which the viewing fee is charged only for the viewed program, is a charging method according to these actual circumstances.

[0006]

[Problems to be Solved by the Invention] In the pay broadcasting, as well as the multi-channelization as described above, the multi-media (Multimedia) is progressing, and the kinds of information included in one program are also increasing. .

However, since pay-per-view viewing is charged on a program-by-program basis, even if the viewer uses only a part of the information included in the program (for example, only audio), all types of information are used. There was a problem that we had to pay the same amount as the case.

Depending on the type of receiving terminal, there may be some types of information that cannot be used, and even in that case, the same viewing fee as when using all types of information must be paid. There was a problem.

The present invention has been made in view of such a situation, and is to enable a fee to be charged according to the information used by a viewer.

[0010]

A descrambling apparatus according to a first aspect of the present invention includes a plurality of programs composed of a plurality of pieces of information transmitted from a broadcast supply side, and each of these pieces of information is scrambled. In a descramble apparatus that receives information indicating whether or not there is a descramble process, a receiving unit that selectively receives a predetermined program from a plurality of programs sent from the broadcast supply side, and a receiving unit that receives the program. Extracted from the program by the first extracting means for extracting a plurality of information, the second extracting means for extracting information indicating whether or not each of the plurality of information is scrambled, and the first extracting means. And a scrambling for each of the plurality of pieces of information extracted by the first extracting means. Second determination means for determining whether or not the application is performed based on the information extracted by the second extraction means, and the first determination means determines that the reception contract is made, and And a descrambling unit that performs a descrambling process on the information determined to be scrambled by the second determining unit.

The descrambling device according to claim 2 is
A plurality of programs composed of multiple pieces of information transmitted from the broadcast supply side, information indicating whether or not each of these pieces of information is scrambled, and a plurality of pieces of information necessary for descrambling these pieces of information. In the descramble apparatus that receives the descramble key of, and descrambles using the descramble key, a receiving unit that selectively receives a predetermined program from a plurality of programs sent from the broadcast supply side, A first extracting means for extracting a plurality of information from the program received by the means; a second extracting means for extracting information indicating whether each of the plurality of information is scrambled; and a plurality of information. A third extraction means for extracting a plurality of descramble keys necessary for descrambling and a reception trigger for each of the plurality of information extracted by the first extraction means. The first determining means for determining whether or not the data is extracted, and the second extracting means for extracting whether or not each of the plurality of pieces of information extracted by the first extracting means is scrambled. It is determined by the second determining means and the first determining means that the reception contract is made based on the obtained information, and that the second determining means determines that the scramble is performed. A descrambling unit that performs a descrambling process on the information based on the scramble key extracted by the third extracting unit is provided.

The descrambling method according to claim 3 is
In a descramble method for receiving a plurality of programs composed of a plurality of information transmitted from the broadcast supply side and information indicating whether or not each of these information is scrambled, and performing a descrambling process, Information indicating whether or not a predetermined program is selectively received from a plurality of programs sent from the broadcast supply side, a plurality of information is extracted from the received program, and each of the plurality of information is scrambled It is determined whether or not a reception contract is made for each of the plurality of extracted information, and whether or not each of the plurality of extracted information is scrambled is extracted. It is characterized by performing a descrambling process on the information that is determined based on the information that has been received, is determined that the receiving contract is made, and that the information is determined to be scrambled.

The descrambling method according to claim 4 is
A plurality of programs composed of multiple pieces of information transmitted from the broadcast supply side, information indicating whether or not each of these pieces of information is scrambled, and a plurality of pieces of information necessary for descrambling these pieces of information. In the descramble method of receiving the descramble key of the program and performing the descramble using the descramble key, a predetermined program is selectively received from a plurality of programs transmitted from the broadcast supply side, and the received program is received. From, a plurality of information is extracted, information indicating whether or not each of the plurality of information is scrambled is extracted, and a plurality of descramble keys necessary for descrambling each of the plurality of information are extracted, It is determined whether or not a reception contract is made for each of the plurality of extracted information, and whether or not scrambling is performed for each of the plurality of information is determined by the information. Based on the extracted scramble key, the descramble processing is performed on the information determined based on the extracted scramble key for the information determined to have the receiving contract and the scramble. And

According to a fifth aspect of the present invention, there is provided a scrambled broadcast transmission / reception apparatus which descrambles a plurality of programs composed of a plurality of scrambled information transmitted from a broadcast supply side in a scrambled broadcast transmission / reception apparatus. The supply side adds, to each of the plurality of information included in the program, addition means for adding information indicating whether or not scrambled to the program, and information indicating whether or not scrambled by the addition means. The receiving terminal includes a receiving unit that selectively receives a predetermined program from the plurality of programs sent from the broadcast supply side, and a receiving unit that receives the program from the receiving unit. A first extraction means for extracting a plurality of information, and a second extraction means for extracting information indicating whether or not each of the plurality of information is scrambled. And a plurality of pieces of information extracted by the first extracting means, and a first judging means for judging whether or not a reception contract is made for each of the plurality of pieces of information extracted by the first extracting means. The first contracting means and the second judging means for judging whether or not the scrambling has been performed on the basis of the information extracted by the second extracting means, and the first judging means make a contract for reception. And descramble means for performing a descramble process on the information determined to be scrambled by the second determining means.

According to another aspect of the present invention, there is provided a scrambled broadcast transmission / reception apparatus which decodes a plurality of programs, each of which is composed of a plurality of scrambled information transmitted from a broadcast supply side, and a plurality of information which constitutes the plurality of programs. In a scrambled broadcast transmitter / receiver that receives a plurality of descramble keys used for scrambling with a receiving terminal on the viewer side and descrambles the received program, the broadcast supply side has a plurality of information included in the program. A first adding means for adding information indicating whether or not the data is scrambled to each program, and a descramble key necessary for descrambling each of the plurality of pieces of information forming the plurality of programs. A second adding means for adding to the program and a plurality of programs to which information indicating whether or not scrambled by the adding means is added are transmitted. And a receiving means for selectively receiving a predetermined program from a plurality of programs sent from the broadcast supply side, and a plurality of pieces of information extracted from the program received by the receiving means. A first extracting means; a second extracting means for extracting information indicating whether each of the plurality of information is scrambled; and a plurality of descrambling keys necessary for descrambling each of the plurality of information Extracted by the first extracting means, a third extracting means for extracting the information, a first determining means for determining whether or not a reception contract is made for the information extracted by the first extracting means, It is determined that a reception contract is made by the first judging means and the second judging means for judging whether or not the information is scrambled based on the information extracted by the second extracting means. Judged and And a descramble means for performing a descramble process on the information determined by the second determining means as being scrambled, based on the scramble key extracted by the third extracting means. To do.

According to a seventh aspect of the present invention, in the scramble broadcasting method, a plurality of programs consisting of a plurality of scrambled information transmitted from the broadcast supply side are received by a receiving terminal on the viewer side, and the received programs are de-coded. In the scrambled broadcasting method of scrambling, the broadcasting supplier adds information indicating whether or not scrambled to each of a plurality of pieces of information included in the program, and sends information indicating whether or not scrambled. Send multiple added programs,
The receiving terminal selectively receives a predetermined program from a plurality of programs sent from the broadcast supply side, and from the received program,
Extracts a plurality of information, extracts information indicating whether or not each of the plurality of information is scrambled, determines whether or not a reception contract is made for each of the plurality of extracted information, and extracts the information. Based on the extracted information, it is determined whether or not each of the plurality of pieces of information that has been scrambled is determined, and that it is determined that the receiving contract is made and that the scramble is performed. A feature is that descramble processing is performed on the determined information.

In the scramble broadcasting method according to the present invention, a plurality of programs composed of a plurality of scrambled information transmitted from the broadcast supply side and a plurality of pieces of information constituting the plurality of programs are descrambled. In a scrambled broadcasting method in which a plurality of descramble keys that are used to perform descrambling are received by a receiving terminal on the viewer side and the received program is descrambled, the broadcast supply side supplies each of a plurality of information included On the other hand, the information indicating whether or not the data is scrambled is added to the program, and the descramble key necessary for descrambling each of the plurality of pieces of information constituting the plurality of programs is added to the program and scrambled. The plurality of programs to which the information indicating whether or not there is added are transmitted, and the receiving terminal determines a predetermined program from the plurality of programs transmitted from the broadcast supply side. Required when selectively receiving, extracting multiple pieces of information from the received program, extracting information indicating whether each of the multiple pieces of information is scrambled, and descramble each of the multiple pieces of information Multiple descrambling keys are extracted, it is determined whether a contract for receiving the extracted information is made, and it is determined whether the extracted information is scrambled. It is characterized by performing a scrambling process on the basis of the extracted scramble key for the information that is determined that the receiving contract is made and the information is determined to be scrambled. To do.

In the descrambling apparatus according to the first aspect of the present invention, a plurality of programs composed of a plurality of pieces of information transmitted from the broadcast supply side and whether or not each of these pieces of information is scrambled are shown. In the descrambling device that receives information and performs the descrambling process, the receiving means selectively receives a predetermined program from a plurality of programs sent from the broadcast supply side, and from the program received by the receiving means, The first extracting means extracts a plurality of information, the second extracting means extracts information indicating whether or not each of the plurality of information is scrambled, and the plurality of information extracted by the first extracting means. The first judging means judges whether or not the reception contract is made for each of the above, and each of the plurality of information extracted by the first extracting means is scrambled. Whether or not it is determined by the second determination means based on the information extracted by the second extraction means, the first determination means determines that the receiving contract is made, and the second determination The descramble processing is performed on the information determined by the means to be scrambled.

In the descrambling device according to the second aspect of the present invention, a plurality of programs transmitted from the broadcast supply side and composed of a plurality of pieces of information, and whether or not each of these pieces of information is scrambled are shown. In a descramble device that receives information and a plurality of descramble keys necessary to descramble these information and descrambles using the descramble key, a plurality of programs sent from the broadcast supply side From the program selectively received by the receiving means, the first extracting means extracts a plurality of information from the program received by the receiving means, and determines whether each of the plurality of information is scrambled. The second extraction means extracts the information shown, and the third extraction means extracts the plurality of descramble keys necessary for descrambling the plurality of information. The first determining means determines whether or not a reception contract is made for each of the plurality of pieces of information extracted by the means, and scrambles each of the plurality of pieces of information extracted by the first extracting means. Based on the information extracted by the second extracting means, the second determining means determines whether or not the application is performed, and the first determining means determines that the receiving contract is made, and The descramble processing is performed on the information determined to be scrambled by the second determination means based on the scramble key extracted by the third extraction means.

In the descrambling method according to the third aspect, a plurality of programs, which are transmitted from the broadcast supply side and are composed of a plurality of information, and whether or not each of these information is scrambled are shown. In a descramble method of receiving information and performing a descramble process, a predetermined program is selectively received from a plurality of programs sent from the broadcast supply side, and a plurality of information is extracted from the received program, Extracting information indicating whether or not each of the plurality of information is scrambled, determining whether or not a reception contract is made for each of the plurality of extracted information, and extracting each of the plurality of extracted information Is determined based on the extracted information, it is determined that the receiving contract is made, and that it is scrambled. Perform descrambling processing on the information.

In the descrambling method according to the fourth aspect, a plurality of programs, which are transmitted from the broadcast supply side and are composed of a plurality of information, and whether or not each of these information is scrambled are shown. In the descramble method of receiving information and a plurality of descramble keys necessary for descrambling the information and performing descrambling using the descramble key, a plurality of programs sent from the broadcast supply side Selectively receives a predetermined program from the program, extracts a plurality of information from the received program, extracts information indicating whether or not each of the plurality of information is scrambled, and decodes each of the plurality of information. Extracts multiple descramble keys required for scrambling, determines whether or not a subscription has been made to each of the multiple extracted information, and Whether or not each of the information is scrambled is determined based on the information, it is determined that the receiving contract is made, and for the information determined to be scrambled, Descramble processing is performed based on the extracted scramble key.

In the scramble broadcast transmitting / receiving device according to the fifth aspect, the scramble broadcast transmitting / receiving device descrambles a plurality of programs composed of a plurality of scrambled information transmitted from the broadcast supply side, The broadcast supply side adds information indicating whether or not scrambled to each of the plurality of information included in the program to the program by the addition means, and adds information indicating whether or not scrambled by the addition means. The transmitting means transmits the plurality of selected programs, and the receiving terminal selectively receives a predetermined program from the plurality of programs transmitted from the broadcast supply side, and from the program received by the receiving means,
The first extracting means extracts a plurality of information, the second extracting means extracts information indicating whether or not each of the plurality of information is scrambled, and the plurality of information extracted by the first extracting means. The first determination means determines whether or not a reception contract is made for each of the above, and whether or not each of the plurality of information extracted by the first extraction means is scrambled, The second determination means makes a determination based on the information extracted by the second extraction means, the first determination means determines that the receiving contract is made, and the second determination means scrambles the data. Descramble processing is performed on the information determined to have been performed.

In the scrambled broadcast transmission / reception device according to the sixth aspect, a plurality of programs composed of a plurality of scrambled information transmitted from the broadcast supply side and a plurality of pieces of information constituting the plurality of programs are respectively transmitted. Multiple descramble keys used to descramble,
In a scrambled broadcast transmission / reception device that receives a program on the receiving terminal on the viewer side and descrambles the received program, the broadcast supply side,
First information in the program indicating whether or not scrambled
Whether or not the descramble key necessary for descrambling each of a plurality of pieces of information constituting a plurality of programs is added to the program by the second adding means and scrambled by the adding means. The transmitting means transmits the plurality of programs to which the information indicating is added, and the receiving terminal selectively receives the predetermined program from the plurality of programs transmitted from the broadcast supply side, and the receiving means receives the predetermined program. The first extracting means extracts a plurality of information from the broadcast program, the second extracting means extracts a piece of information indicating whether or not each of the plurality of information is scrambled, and the plurality of information is extracted. The third extracting means extracts a plurality of descramble keys necessary for scrambling, and the first determining means determines whether or not a reception contract is made for the information extracted by the first extracting means. And then The second determination means determines whether or not the information extracted by the extraction means is scrambled, based on the information extracted by the second extraction means, and the first determination means Descramble is performed for the information determined to have the reception contract, and the information determined to be scrambled by the second determination means, based on the scramble key extracted by the third extraction means. Perform processing.

In the scramble broadcasting method according to claim 7, a plurality of programs including a plurality of scrambled information transmitted from the broadcast supply side are received by a receiving terminal on the viewer side, and the received programs are received. In the descrambling scrambled broadcasting method, the broadcast supply side adds information indicating whether or not scrambled to each of a plurality of pieces of information included in the program, and information indicating whether or not scrambled. Transmitting a plurality of programs added with, the receiving terminal selectively receives a predetermined program from the plurality of programs sent from the broadcast supply side, extracts a plurality of information from the received program, Extracting information indicating whether each of the plurality of information is scrambled, determining whether or not a reception contract is made for each of the plurality of extracted information, and performing extraction. Based on the extracted information, it is determined whether or not each of the plurality of pieces of information that has been scrambled is determined, and that it is determined that the receiving contract is made and that the scramble is performed. Descramble processing is performed on the determined information.

In the scramble broadcasting method according to the present invention, a plurality of programs composed of a plurality of scrambled information transmitted from the broadcast supply side and a plurality of pieces of information constituting the plurality of programs are respectively decompressed. In a scramble broadcasting method in which a descramble key used for scrambling and a receiving terminal on the viewer side are received, and the received program is descrambled, the broadcast supply side uses a plurality of information included in the program. For each, information indicating whether or not it is scrambled is added to the program, and a descramble key necessary for descrambling each of the plurality of pieces of information constituting the plurality of programs is added to the program and scrambled. , The receiver terminal transmits the plurality of programs to which the information indicating whether the Selectively receive each program, extract a plurality of information from the received program, extract information indicating whether each of the plurality of information is scrambled, and descramble each of the plurality of information. At this time, multiple descramble keys necessary for extraction are extracted, it is determined whether a contract for receiving the extracted information is made, and it is extracted whether the extracted information is scrambled. Scramble processing is performed based on the extracted scramble key for the information that is determined based on the received information and that it is determined that the receiving contract is made and the scramble is applied.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing a configuration example of an embodiment of the present invention. Note that this broadcasting system is based on a broadcasting system called scramble broadcasting. In this scrambled broadcast, the broadcast side intentionally disturbs the original signal by a predetermined method so that normal images, sound, data, etc. cannot be used even if a person who does not have a contract with the broadcast station receives the broadcast. It is a broadcasting system that does.

Therefore, in this specification, first, this system will be briefly described, and then a data transmission method in this system will be described. Finally, the operation of the embodiment of the present invention based on this system will be described.

First, the configuration of the transmission side system will be described.

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 is "program information" including information about a program and a scramble key for descrambling, a subscriber (viewer).
Each contract information (for example, contract form for flat viewing, pay-per-view viewing, etc.) and “individual information” including a contract key for decrypting the program information (common information) are included.

The scrambler 3 (transmitting means, second adding means) selectively scrambles a predetermined one of the output signals from the multiplexer 2 with a scramble key from the related information transmitting device 4 described later. It is designed to be applied.

The scramble control system 6 supplies the contract key to the related information transmitting device 4 and also encrypts the contract key with an individual key unique to the receiving device (hereinafter referred to as the receiving terminal) and multiplexes it as a part of the individual information. It is designed to be supplied to the chemical converter 2.

The related information sending 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
The program ID of the program encoded by the encoder 1 and the channel ID of the corresponding channel (Serv
ice_id) and the like are supplied to the related information sending device 4. The viewing information collection processing system 7 processes viewing information (for example, a channel ID corresponding to a viewed program and a viewing time) that is uplinked (uploaded) from a large number of receiving terminals and a contract request from a viewer. The contract information is supplied to the scramble control system 6.

Next, the structure of the receiving terminal will be described.

Decoder 21 of the receiving terminal (reception means, first
Of the scrambled signal based on the scramble key supplied from the security module 22 described later by the built-in descrambler 41 (descrambler). Is descrambled to the original signal. Further, the individual information and the program information added to the program are extracted and output.

The security module 22 is, for example, I
It is composed of a C card or the like, stores an individual key unique to the terminal, takes in the unscrambled individual information supplied through the decoder 21, decrypts the individual information with the individual key, and takes out the contract key and the contract information, respectively. ,Remember. Further, the common information accompanying the program supplied via the decoder 21 is taken in, the common information is decrypted by the contract key, the scramble key is taken out, and the decoder 21 is supplied.

The pay confirmation button 23 is for the viewer to input that the program is purchased. Further, the impulse pay per view button 24 is a button that is pressed when performing impulse pay per view viewing.

Next, the operation of the system will be described.

First, the operation when the transmitting side system transmits individual information to the receiving terminal will be described. This individual information is, for example, a contract key number corresponding to the contract key, a contract key, a channel ID corresponding to the contracted channel,
And contract type etc. are included. 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 so that a plurality of contract keys can be used properly. The contracted channel ID is represented by, for example, 16-bit Service_id. The contract type can identify a flat viewing contract, a pay-per-view viewing contract, and a special contract, and is, for example, 4 bits.

This 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 signal and audio signal 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 converted, it is supplied to the scrambler 3.

In the digital signal supplied to the scrambler 3, only the program part (audio data and video data) is scrambled using the scramble key supplied from the related information transmitting device 4, and the individual information part is not scrambled. To the transmission line 31.

The transmission of the individual information to the receiving terminal is carried out at any time when it is necessary to update the individual information. 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 includes, for example, the contract type, the contract key number indicating the contract key number, the encrypted scramble key, and the Service_id corresponding to the channel ID,
It includes a program ID for identifying the program. 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 structure 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 compressed video signal or audio signal forming a program supplied thereto and a digital signal in which program information is time division multiplexed are scrambled supplied from the related information sending device 4. Only the program part is scrambled by the key, and the program information part is sent to the transmission line 31 without being scrambled.

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

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

FIG. 2 is a diagram for explaining the basic operation when the viewing permission is controlled in the receiving terminal.
The decoder 21 includes, for example, a descrambler 41, a second decoder 42 (second extracting means, third extracting means), and a first decoder 43.

The individual information is transmitted to the receiving terminal of the viewer who has formally contracted. From the transmitting system, the transmission line 31
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 41.

On the other hand, in 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 22. If they match, the data is supplied to the first decoder 43.

The individual information supplied to the first decoder 43 is
The contract key and contract information are decrypted by the individual key stored in the security module 22 and unique to the receiving terminal, and stored in the security module 22. 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.

At the receiving terminal, when the viewer is viewing the program, the receiving terminal receives the predetermined scrambled program transmitted via the transmission path 31 and the program information accompanying it. . The descrambler 41 outputs the digital signal corresponding to the scrambled predetermined program.
Program information supplied to the second decoder 4
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 43 and stored in the security module 22 as described above, the second decryption key is obtained. The device 42 operates and the program information is decrypted by the contract key supplied from the security module 22. 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 22 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 42 is supplied to the descrambler 41. In the descrambler 41, the scrambled digital signal of the predetermined program is descrambled by the scramble key supplied from the second decoder 42, returned to the original signal for normal viewing, and then output. .

When a predetermined channel is flat-viewed and contracted, individual information including contract key corresponding to the contracted channel, service_id corresponding to the channel, contract information including contract type, etc. is transmitted from the transmission side system to the reception terminal. And is stored in the security module 22 constituting 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 22 and the contract key indicated by the contract key number in the program information is stored in the security module 22. . When the contract type corresponding to Service_id is flat viewing, the program information is decrypted by the second decryptor 42, the obtained scramble key is supplied to the descrambler 41, and the descrambler 41 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 call-ahead pay-per-view viewing, first, the viewer informs the sender in advance that there is a program he / she desires to view, by means of a receiving terminal or a telephone. Next, the transmission side transmits the Service_id, contract key number, contract key, etc. of the program requested by the viewer to the receiving terminal as personal information. After this procedure, the viewer can view the desired program by pressing the pay confirmation button 23 or the like.

Further, in the case of impulse pay per view viewing, the viewer operates the impulse pay per view button 24, and further performs an operation for specifying a program desired to be viewed from an input device (not shown). When such an operation is performed, the contract key corresponding to the channel, the Service_id corresponding to the channel, and the individual information including the contract type are immediately transmitted from the transmission side system to the reception terminal, and the security module is transmitted via the decoder 21. 22 and is stored. If there are many programs to watch, this procedure will be repeated.

Thus, in the case of impulse pay per view viewing, Ser in the program information accompanying the received program is
The service_id, the contract key indicated by the contract key number in the program information, and the like are stored in the security module 22. Further, the viewer can view the program by pressing the pay confirmation button 23 or the like.

When a pay-per-view (including both call ahead and impulse) viewing operation is performed,
For example, the channel ID (Service
_Id), a program ID (Event_id), a component map (Component_map), a charge amount (Charge), a viewing time, and the like are stored in the security module 22 each time. The viewing information stored in the security module 22 is transmitted to the transmission side system via the telephone line 32 at a predetermined billing 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.

The above is the description of the scramble broadcasting system.

Next, the structure of data when the system transmits data will be described.

The present system transmits a large number of programs (programs) including a plurality of information such as images, sounds and data. These pieces of information are divided into streams (data strings) of appropriate length called packets and transmitted.

FIG. 3 shows the data structure during transmission. The transport packet shown in FIG.
As shown in FIG. 3B, the packet 51 is called P
It includes an ID (Packet Identification) 52 and a payload (information) 53. The payload 53 is the substance of the information to be transmitted (for example, image data, audio data, etc.)
The PID 52 is an identifier indicating the type of information (for example, image or sound).

When reproducing a program on the receiving side, first, one is selected from a plurality of programs. Next, the PID of the packet including, as a payload, information necessary for reproducing the program (eg, image, audio, etc.) is obtained. Then, the parameters of these packets are obtained.

By the way, these pieces of information necessary for restoring the program are included in the additional information table. FIG.
Shows the overall structure of the stream including this additional information table. PAT (Program Association)
The Table) 61 includes the program numbers of all the programs transmitted via the transmission path 31. Also, PMT (Prog
The ram map table) 62 exists for each program, and contains information for designating the packets required to reproduce a specific program.

When reproducing a specific program from a plurality of programs based on the above information, first, PAT61 (PA
T acquires the program number of the program included in the packet having PID = 0), and obtains the PID designated by the program number (PID = 51 in the case of FIG. 4). Next, by referring to the PMT 62 designated by this PID, the receiving terminal can know the packet to be selected from the stream.

The PMT 62 includes a program number of the program, a list of PIDs including information such as images and sounds which form the program, and other auxiliary information. In the example of this figure, PID = “1” is image information (Video), PID =
“2” represents audio information (Audio), and PID = “3” represents a packet containing data (Data). Then, the receiving terminal, based on these PIDs,
A packet required for reproducing a program can be selected from the stream (data string).

In addition, CAT (Conditional Access Tabl)
e) 63 is individual information (hereinafter, EMM (Entitlement Mana
a packet (including a message) is stored in the table (packet). In FIG. 4, the CAT 63 has a PI for designating the EMM 64.
Information (not shown) of D = “9” is included,
Based on this information, the receiving terminal can select this EMM 64 from the stream.

Further, the PMT 62 has program information (hereinafter,
It has a PID for designating a packet including an ECM (Entitlement Control Message). In the example of FIG. 4, the PMT 62 specifies the ECM 65 with PID = “8” as the program information.

FIG. 5 is a diagram showing the structure of the PMT. In this figure, Program_number80 is
The program number. Also, CA_system_id81
Is an identifier for specifying the type (specifically, manufacturer) of the receiving terminal. The ECM_PID 82 is a PID for designating the ECM 83 including program information.
The ECM 83 has a Ks (scramble key) 84 for descrambling a program and a Compon described later.
ent_map85 is included.

Also, Stream_type 86, 9
2, 97 and 102 indicate the type of information (image, audio, etc.) of the stream. Furthermore, ES_PID1 to 4
(87, 93, 98, 103) has the PID of the packet in which the respective information is stored, and the receiving terminal
The packet is identified based on these. Also, Compo
lent_tag 0 to 3 (88, 94, 99, 10)
4) is a tag indicating which component (output device) of the receiving terminal each packet is output to. The receiving terminal determines which output device to output each packet based on this Component_tag.

In this figure, AUDIO1 (95, 96)
Is, for example, the main voice, and AUDIO2 (100, 10
1) is, for example, a sub voice. Therefore, Strea
m_type92 and stream_type97
Is the same AUDIO (audio) information, but each Component_tag is Component_
It is distinguished from tag1 or Component_tag2. Therefore, the receiving terminal uses Stream_type.
Determine the decoding method based on 92, 97
The output destination of the decoded information can be determined based on the nt_tag 94, 99.

FIG. 6 is a diagram showing the structures of EMM and CAT. In the example of this figure, EMM124 is CAT121.
Specified by the EMM_PID 123. CA
In T121, the above-mentioned CA_system_id122 is set.
And an EMM_PID 123 for designating the EMM. Further, the EMM 124 designated by the CAT 121 is a Kw for decrypting the common information.
It includes the identification number Kw_No125 of (contract key). Also,
In addition, Service_id 127, Event_
id128, and Component_ma described later
It is composed of p126.

Next, Component_map will be described.

FIG. 7 shows the structure of Component_map. This Component_map is
ECM (program information) 83 (Component_ in FIG. 5)
map85) and EMM (individual information) 124 of FIG.
It is included in both (Component_map 126). Also, Component_map is a bit
It consists of a total of 16 bits from 0 to bit 15, and one bit is assigned to one component (output device).

Comp included in the ECM 83 of FIG.
The onent_map 85 has the corresponding bit turned ON (“1”) when the information for each component is scrambled. For example, in FIG.
It is assumed that t0 corresponds to image information. Then, in the transmitting system, when the image information is scrambled, the Component_map of the ECM 83 is used.
The bit0 of 85 is turned on (“1”).

FIG. 8 is a flow chart for explaining the processing at this time.

In step S1 of FIG. 8, the program control system 5 of the transmission side system initializes 0 to i.
Subsequently, in step S2, the program control system 5
Determines whether the information output to the i-th component is scrambled. If it is determined that it is scrambled, the process proceeds to step S3,
Turn on the i-th bit of the component map.
If it is determined that the data is not scrambled, step S3 is skipped and the process proceeds to step S4.

In step S4, 1 is added to the value of i. Subsequently, in step S5, it is determined whether or not the value of i is equal to 16. If it is determined that they are not equal, the process returns to step S2 and the same processing is repeated. Also,
If it is determined that they are equal, the processing ends.

By the above processing, Comp of ECM83
For onent_map85, the bit corresponding to the scrambled information is turned on.

Next, the EMM124 Component
The nt_map 126 will be described. In the component_map 126 of the EMM 124, the viewer subscribes to each piece of information (authorized).
In this case, the corresponding bit is turned on (“1”). For example, if bit 0 of Component_map is image information and the viewer has a viewing contract for this image information, bit 0 is turned on.

FIG. 9 is a flow chart for explaining the processing at this time.

In step S11 of FIG. 9, the scramble control system 6 of the transmission side system initializes 0 to i. Then, in step S12, the scramble control system 6 determines whether the information output to the i-th component is contracted. If it is determined that the contract is made, step S13
To the O-th bit of the component map.
N If it is determined that the contract is not made, step S13 is skipped and the process proceeds to step S14.

In step S14, 1 is added to the value of i. Then, in step S15, the value of i and 16
It is determined whether and are equal. If it is determined that they are not equal, the process returns to step S12 and the same processing is repeated. If it is determined that they are equal, the process ends.

By the above processing, the Comm of EMM124 is
The bit corresponding to the contracted information is turned on in the element_map 126.

ECM83 obtained by the above processing
Component_map85 and EMM124
Component_map 126 is shown in FIG.
The packets are added to the ECM 65 and EMM 64 packets, respectively, and sent from the transmission side system to the transmission path 31.

The receiving terminal receives these pieces of information and performs the processing described below.

FIG. 10 is a flow chart for explaining the processing performed by the receiving terminal. In step S21 of this figure, the decoder 21 outputs the ECM from the second decoder 42.
(Program information) is read, and further, from this ECM, Co
Extract component_map1. Further, in step S22, the decoder 21 reads the EMM from the first decoder 43, and further, the EMM is read from the EMM.
ent_map2 is extracted.

Here, two Component_ma
In order to distinguish p, the one extracted from ECM is
The component_map1 and the component extracted from the EMM are defined as Component_map2.

In step S23, the decoder 21
Initializes i to 0. Then, step S24
In, the decoder 21 determines that Component_ma
The i-th bit of p1 is 1, and Compo
It is determined whether or not the i-th bit of nent_map2 is 1. If it is determined that the above conditions are not satisfied, the process proceeds to step S26, and if it is determined that the conditions are satisfied, the process proceeds to step S25.

Here, the reason for making such a determination will be described. FIG. 11 shows Component_ma.
The relationship between p1, Component_map2, and the descrambling operation is shown. Component
If the bit of _map1 (Component_map of ECM) is "1", it indicates that the information sent from the transmission side system is scrambled. In addition, Component_map2 (Complement of EMM
if the bit of the (entent_map) is “1”,
It indicates that the viewer has a contract for this information.

If the bit of Component_map1 is "0", this information is not scrambled, so it is not necessary to descramble it. Unscrambled information means that it can be used freely, so viewers can use this information regardless of whether they have a contract.

If the bit of Component_map1 is "1", it means that this information is scrambled. In this case, the viewer subscribes to this program (the bit of Component_map2 is "1"). ) Descramble only if, and not if you do not have a contract.

Therefore, in step S24 of FIG.
i_th bit of component_map1 and C
Only when the i-th bit of the component_map2 is compared and it is determined that both of these bits are “1”, the process proceeds to step S25 and the Component
The information corresponding to the i-th bit of t_map1 is descrambled.

Next, in step S26, 1 is added to the value of i. Then, in step S27, the value of i and 1
It is determined whether or not 6 and 6 are equal, and if it is determined that they are not equal, the process returns to step S24 and the same processing is repeated. If it is determined that they are equal, the process ends.

As a result of the above processing, the viewer can use the information in accordance with the status of each information contract.

In the above embodiment, one Ks is included in the ECM.
Only (scramble key) is included. However, in order to make the protection of information more stringent, it is possible to allocate Ks to each component one by one.

In FIG. 12, K is assigned to each component.
It is a figure which shows the structure of PMT when s is allocated. In this figure, the same parts as those in FIG. 5 are designated by the same reference numerals, and the description thereof will be appropriately omitted.

In this figure, the ECM 83 is deleted and the EC
M1 to ECM4 are newly added. ECM1
(132) is added to the image information and includes Ks1 (133) for descrambling the image information. In addition, ECM2 (136) and ECM3 (14
1) is added to the voice information, and Ks2 (137) and Ks for descramble the voice information.
s3 (141) is included. Finally, ECM4 (1
45) is added to the data, and Ks4 for descrambling the data is added. In addition, each ECM has a C indicating the type of each information.
component_map is added. further,
In order to specify each ECM, the PMT80 has an EC
M_PID1 (131), ECM_PID2 (13
5), ECM_PID3 (139), ECM_PID4
(144) is newly added.

Next, the processing performed by the receiving terminal when the information shown in FIG. 12 is sent from the transmitting side system will be described.

FIG. 13 is a flow chart for explaining the processing performed by the receiving terminal which has received the information shown in FIG. In step S31 of this figure, the decoder 21 initializes i to 1. Next, in step S32, the decoder 21 outputs the EMM (individual information) from the first decoder 43.
Read out, and from this EMM, Componen
Extract t_map2. In addition, in step S33, the decoder 21 determines that the i-th E-th decoder from the second decoder 42.
Read the CM, and then from this EMM, the Component
Extract nt_map1.

Since i is 1 now, step S33
Then, the first ECM (ECM1) is the second decoder 42
Read from this ECM1 from Compon
ent_map1 is extracted.

In step S34, the Component
The bit that is “1” in nt_map1 is Com.
It is also determined whether or not it is “1” in the “ponent_map2”. If it is determined that the same bits are not "1", the process proceeds to step S36, and if it is determined that they are "1", the process proceeds to step S35.

In the embodiment of FIG. 12, bit 0 of the Component_map1 stored in the ECM1 is "1". Therefore, if the bit 0 of the EMM is "1", the process proceeds to step S35, and if the bit is "0", the process proceeds to step S36.

In step S35, the decoder 21 extracts Ks from the i-th ECM, and the descrambler 41
To supply.

Since i is 1, the first EC
Ks1 (133) is extracted from M (ECM1 (132)) and supplied to the descrambler 41.

Next, in step S36, 1 is added to i. In the embodiment of FIG. 12, the maximum ECM value is 4
(DATA ECM value), so step S37
In, it is determined whether or not the value of i is equal to 5 (the maximum value of ECM + 1). If it is determined that they are not equal, the process returns to step S33 and the same processing is repeated. If it is determined that they are equal, the processing ends.

As a result of this processing, the scramble key can be extracted from each information supplied to each component (output device) to perform scrambling.

Further, in this embodiment, the scramble key is added to each of the information output to each component, but it is also possible to share the same scramble key for image and sound, for example. In that case, ECM_PID1
And ECM_PID2 have the same value.
Will specify the same ECM.

As a result of the above processing, not only it becomes possible to make a viewing contract for each piece of information, but also a descramble key is added to each piece of information, so that the information can be further improved. It becomes possible to protect more strictly.

Further, since the information provider can charge the information according to the contract form of the information of each viewer, the viewer pays the price only for the used (contracted) information. I'll do it.

[0116]

As described above, according to the descrambling device of the first aspect and the descrambling method of the third aspect, a predetermined program is selected from a plurality of programs sent from the broadcast supply side. From the received programs,
Extracts a plurality of information, extracts information indicating whether or not each of the plurality of information is scrambled, determines whether or not a reception contract is made for each of the plurality of extracted information, and extracts the information. Based on the extracted information, it is determined whether or not each of the plurality of pieces of information that has been scrambled is determined, and that it is determined that the receiving contract is made and that the scramble is performed. Since the descramble processing is performed on the determined information, the viewer can make a viewing contract for each piece of information that constitutes the program.

According to the descrambling apparatus of the second aspect and the descrambling method of the fourth aspect, a predetermined program is selectively received from a plurality of programs sent from the broadcast supply side and received. Extracted multiple information from the program, extracted information indicating whether each of the multiple information is scrambled, and extracted multiple descramble keys required to descramble each of the multiple information. Then, it is determined whether or not a reception contract is made for each of the plurality of extracted information, and whether or not each of the plurality of information is scrambled is determined based on the information. ,
The program is configured because the descramble processing is performed based on the extracted scramble key for the information that is determined to have the reception contract and is determined to be scrambled. Not only can the viewer make a viewing contract for each piece of information, but more strict information protection can be performed.

According to the scramble broadcast transmitting / receiving apparatus of the fifth aspect and the scramble broadcast method of the seventh aspect, whether or not the broadcast supply side is scrambled with respect to each of the plurality of information included in the program. Is added to the program, the plurality of programs to which the information indicating whether or not scrambled is added is transmitted, and the receiving terminal selects a predetermined program from the plurality of programs transmitted from the broadcast supply side. Selectively receives, extracts a plurality of information from the received program, extracts information indicating whether each of the plurality of information is scrambled, and receives for each of the extracted plurality of information It is determined whether or not a contract is made, and whether or not each of the plurality of extracted information is scrambled is determined based on the extracted information, and it is determined that the reception contract is made. Is constant, and, since to perform the descrambling process on the information scrambled is determined to have been subjected, viewer for each information constituting the program can perform the viewing contract.

According to the scramble broadcast transmitting / receiving device of the sixth aspect and the scramble broadcast method of the eighth aspect, whether the broadcast supply side is scrambled with respect to each of the plurality of information included in the program or not. Is added to the program, the descramble key necessary to descramble each of the plurality of pieces of information constituting the plurality of programs is added to the program, and information indicating whether or not scrambled is added. The receiving terminal selectively receives a predetermined program from a plurality of programs sent from the broadcast supply side, extracts a plurality of information from the received program, and outputs a plurality of information. Information that indicates whether or not each of the two is scrambled, multiple descramble keys that are necessary when descramble each of the multiple information, and the corresponding extracted information. It is determined based on the extracted information whether or not the extracted information is scrambled, and it is determined that the received contract is made. Moreover, since the scramble processing is performed based on the extracted scramble key for the information determined to be scrambled, the viewer must make a viewing contract for each piece of information that constitutes the program. Not only is it possible to protect the information more strictly.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration example of an embodiment of the present invention.

FIG. 2 is a diagram for explaining a principle of operation of a receiving terminal.

FIG. 3 is a diagram illustrating a structure of a stream transmitted from a transmission side system.

FIG. 4 is a diagram illustrating a hierarchical structure of a stream transmitted from the transmission side system.

FIG. 5 is a diagram illustrating a PMT and various packets designated by the PMT.

FIG. 6 is a diagram illustrating a configuration of a CAT and an EMM designated by the CAT.

FIG. 7 is a diagram illustrating the structure of a component map.

FIG. 8 is a flowchart illustrating a process of creating a component map added to the ECM.

FIG. 9 is a flowchart illustrating a process of creating a component map added to the EMM.

FIG. 10 is a flowchart illustrating a process of determining whether or not to descramble each piece of information when a single scramble key is used.

FIG. 11 shows the bits of the component map of ECM,
It is a figure which shows the relationship between the bit of the component map of EMM, and a descrambling process.

FIG. 12 is a PMT in the case of using a plurality of scramble keys
It is a figure which shows the relationship between various tables designated by it.

FIG. 13 is a flowchart illustrating a process of determining whether or not to descramble various information when a plurality of scramble keys are used.

[Explanation of symbols]

1 Encoder 2 Multiplexer (Adding Means) 3 Scrambler Sending Means, Second Adding Means) 4 Related Information Sending Device 5 Program Control System 6 Scrambling Control System 7 Viewing Information Collection Processing System 21 Decoder (Reception Means, First) Extraction means, first determination means, second determination means) 22 Security module 23 Pay confirmation button 24 Impulse pay-per-view button 31 Transmission line 32 Telephone line 41 Descrambler (descramble means) 42 Second decoder (second extraction) Means, Third Extraction Means) 43 First Decoder

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location H04K 1/00 H04K 1/00 Z

Claims (8)

[Claims] 1. A plurality of programs composed of a plurality of pieces of information transmitted from a broadcast supply side, and information indicating whether or not each of these pieces of information is scrambled are received.
In a descrambling device that performs a descrambling process, a receiving unit that selectively receives a predetermined program from the plurality of programs sent from the broadcast supply side; and a plurality of the plurality of programs from the program received by the receiving unit. First extracting means for extracting the information, second extracting means for extracting information indicating whether or not each of the plurality of information is scrambled, and the plurality of information extracted by the first extracting means. First determining means for determining whether or not a reception contract is made for each of the information items, and whether each of the plurality of information items extracted by the first extracting means is scrambled. It is determined that a reception contract has been made by the second determination means that determines whether or not the second extraction means is based on the information extracted by the second extraction means, and the first determination means, One, descrambling device characterized by comprising a descrambling means for performing the descrambling process on the information determined scrambling is applied by the second judging means. 2. A plurality of programs composed of a plurality of information transmitted from a broadcast supply side, information indicating whether or not each of these information is scrambled, and descrambling these information In the descrambling device that receives a plurality of descramble keys necessary for the descrambling key and descrambles using the descramble key, a predetermined program is selectively selected from the plurality of programs sent from the broadcast supply side. Receiving means for receiving the information, first extracting means for extracting the plurality of information from the program received by the receiving means, and information for indicating whether or not each of the plurality of information is scrambled Second extracting means for extracting the plurality of pieces of descrambling key necessary for descrambling the plurality of pieces of information; First determining means for determining whether or not a reception contract is made for each of the plurality of pieces of information extracted by the extracting means, and for each of the plurality of pieces of information extracted by the first extracting means. On the other hand, a reception contract is made by the second judging means for judging whether or not the scramble is applied based on the information extracted by the second extracting means, and the first judging means. Descramble processing is performed on the information determined to be scrambled by the second determining means based on the scramble key extracted by the third extracting means. A descrambling device comprising: a descrambling means for performing. 3. A plurality of programs composed of a plurality of pieces of information transmitted from a broadcast supply side and information indicating whether or not each of these pieces of information is scrambled are received.
In a descramble method for performing a descrambling process, a predetermined program is selectively received from the plurality of programs sent from the broadcast supply side, and the plurality of pieces of information are extracted from the received program, Extracting information indicating whether or not each of the plurality of information is scrambled, determining whether or not a reception contract is made for each of the plurality of extracted information, and extracting the plurality of information It is determined whether or not each of the above is scrambled based on the extracted information, and it is determined that the receiving contract is made and it is determined that the scramble is performed. A descrambling method characterized by performing a descrambling process on information. 4. A plurality of programs composed of a plurality of pieces of information transmitted from a broadcast supply side, information indicating whether or not each of these pieces of information is scrambled, and descrambling these pieces of information In the descrambling method of receiving a plurality of descramble keys necessary for the descrambling key and performing descrambling using the descramble key, a predetermined program is selectively selected from the plurality of programs sent from the broadcast supply side. When the plurality of pieces of information are extracted from the received program, the pieces of information indicating whether or not the pieces of information are scrambled are extracted, and the pieces of information are descrambled. The plurality of descramble keys necessary for the above, and it is determined whether or not a reception contract is made for each of the plurality of extracted information, Whether or not each of the information is scrambled is determined based on the information, and it is determined that the reception contract is made and the information is determined to be scrambled. On the other hand, a descramble method characterized by performing a descramble process based on the extracted scramble key. 5. A scrambled broadcast transmitter / receiver for descrambled a plurality of programs, each of which is composed of a plurality of scrambled information transmitted from a broadcast supply side, wherein the broadcast supply side is included in the program. Added to each of the plurality of information to be added, the information indicating whether or not the program is scrambled, and the plurality of information to which the information indicating whether or not the scramble is added by the adding unit. And a receiving means for selectively receiving a predetermined program from the plurality of programs transmitted from the broadcast supply side, and the receiving means for receiving the program. A first extracting means for extracting the plurality of information from the program; and information indicating whether or not each of the plurality of information is scrambled. Second extracting means for extracting; first determining means for determining whether or not a reception contract is made for each of the plurality of pieces of information extracted by the first extracting means; Second determining means for determining whether or not each of the plurality of information extracted by the extracting means is scrambled, based on the information extracted by the second extracting means, And a descramble means for performing a descramble process on the information which is determined by the first determining means that the reception contract is made and which is determined by the second determining means that the scramble is performed. A scrambled broadcast transmitter / receiver characterized by comprising. 6. A plurality of programs composed of a plurality of scrambled information transmitted from a broadcast supply side, and a plurality of data used to descramble each of a plurality of information constituting the plurality of programs. A scramble key, in the scramble broadcast transmitting and receiving device for receiving the receiving side of the viewer side, and descramble the received program, the broadcast supply side, for each of the plurality of information included in the program, First adding means for adding information indicating whether or not scrambled to the program, and a descrambling key necessary for descrambling each of the plurality of pieces of information forming the plurality of programs to the program Second adding means for transmitting the plurality of programs to which the plurality of programs to which the information indicating whether or not the scramble has been added by the adding means are transmitted. Means, the receiving terminal selectively receives a predetermined program from the plurality of programs sent from the broadcast supply side; and the plurality of programs from the programs received by the receiving means. A first extracting means for extracting the information, a second extracting means for extracting information indicating whether each of the plurality of information is scrambled, and a descrambling each of the plurality of information. Third extraction means for extracting the required plurality of descramble keys, and first determination means for determining whether or not there is a reception contract for the information extracted by the first extraction means. Second determining means for determining whether or not the information extracted by the first extracting means is scrambled, based on the information extracted by the second extracting means. It is determined that the reception contract is made by the first determination means, and to said information scrambled by the second determining means is determined to have been applied, the third
Based on the scramble key extracted by the extraction means of
A scramble broadcast transmitting / receiving apparatus comprising: a descramble means for performing a descramble process. 7. A scramble broadcasting method for receiving a plurality of programs composed of a plurality of scrambled information transmitted from a broadcast supply side by a receiving terminal on a viewer side and descramble the received programs, The broadcast supply side adds information indicating whether or not scrambled to each of the plurality of information included in the program to the program, and information indicating whether or not the scrambled information is added to the program. Transmitting the plurality of programs, the receiving terminal selectively receiving a predetermined program from the plurality of programs sent from the broadcast supply side, and extracting the plurality of information from the received program Then, the information indicating whether or not each of the plurality of information is scrambled is extracted, and whether the reception contract is made for each of the extracted plurality of information. It is determined whether or not each of the plurality of extracted information is scrambled based on the extracted information, and it is determined that a reception contract is made, and , A scramble broadcasting method, characterized in that descramble processing is performed on the information determined to be scrambled. 8. A plurality of programs composed of a plurality of scrambled information transmitted from a broadcast supply side, and a plurality of data used to descramble each of a plurality of information constituting the plurality of programs. In a scramble broadcasting method in which a scramble key and a receiving terminal on the viewer side are received and the received program is descrambled, the broadcast supply side scrambles each of the plurality of information included in the program. Is added to the program, and a descramble key necessary to descramble each of the plurality of pieces of information constituting the plurality of programs is added to the program. Transmitting the plurality of programs to which information indicating whether or not the receiving terminal is the plurality of programs transmitted from the broadcast supply side. Selectively receiving a predetermined program from the program, extracting the plurality of information from the received program, extracting information indicating whether each of the plurality of information is scrambled, the plurality of information The plurality of descramble keys necessary for descramble each of the above are extracted, it is determined whether or not the reception contract is made for the extracted information, and the scramble is performed for the extracted information. Whether or not it is applied is determined based on the extracted information, and it is determined that the receiving contract is made and the information that is determined to be scrambled is extracted. A scramble broadcasting method characterized by performing scramble processing based on a scramble key.