JP3680365B2 - Descrambling device, descrambling method, scrambled broadcasting transmission / reception device, scrambled broadcasting method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a descrambling device, a scramble method, a scrambled broadcasting transmission / reception device, and a scrambled broadcasting method, and particularly suitable for use in scrambled broadcasting in which a viewing contract is selectively made for each piece of information consisting of a plurality of information. The present invention relates to a descrambling device, a descrambling method, a scrambled broadcast transmitting / receiving device, and a scrambled broadcasting method.
[0002]
[Prior art]
In recent years, video and audio compression methods such as MPEG2 (Moving Picture Experts 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 before using the existing transmission line.
[0003]
In response to this trend, multi-channel broadcasting has been advanced in pay broadcasting systems, and more programs can be transmitted through more channels than before.
[0004]
By the way, the viewing format of the pay broadcasting system is roughly divided.
(A) Flat viewing with a contract for each channel
(B) There are two types of viewing, pay per view, which pays a fee according to the program viewed. For pay-per-view viewing,
(B-1) Call Ahead Pay per View that informs the sender in advance that the program will be viewed
(B-2) Impulse Pay per View viewing that does not require prior notification of the program to the sender
There are two.
[0005]
Now, even if the number of programs received by the viewer increases as described above, the viewer does not view 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 pay-per-view viewing, in which a viewing fee is charged only for a program that has been viewed, is a billing method in accordance with these circumstances.
[0006]
[Problems to be solved by the invention]
In pay broadcasting, as described above, at the same time as multi-channeling, multimedia is also progressing, and the type of information included in one program is increasing.
[0007]
However, pay-per-view viewing is charged on a program-by-program basis, so even if the viewer uses only a part of the information included in the program (for example, only audio), the same amount as when all types of information are used. There was a problem of having to pay the fee.
[0008]
Also, depending on the type of receiving terminal, there may be a type of information that cannot be used, but even in that case, there is a problem that the same viewing fee must be paid as when all types of information are used. there were.
[0009]
The present invention has been made in view of such circumstances, and is intended to enable charging according to information used by a viewer.
[0010]
[Means for Solving the Problems]
The descrambling device according to claim 1 shows 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. A first component map, and a second component map indicating whether or not a reception contract is made for each of these pieces of information; In the descrambling device that performs descrambling processing, receiving means for selectively receiving a predetermined program from a plurality of programs sent from the broadcast supply side, and a plurality of programs from the program received by the receiving means, First extraction means for extracting information and whether each of the plurality of information is scrambled First component map Second extracting means for extracting Third extraction means for extracting a second component map indicating whether or not a reception contract is made for each of the plurality of pieces of information; Whether or not a reception contract is made for each of the plurality of pieces of information extracted by the first extraction means. Based on the second component map extracted by the third extraction means The first extracting means for determining and whether the plurality of pieces of information extracted by the first extracting means are scrambled are extracted by the second extracting means. First component map The information determined by the second determination means and the first determination means that the reception contract is made and the second determination means determines that the scramble is applied. And a descrambling means for performing descrambling processing.
[0011]
The descrambling device according to claim 2 shows a plurality of programs composed of a plurality of information transmitted from the broadcast supply side, and whether or not each of these pieces of information is scrambled. A first component map and a second component map indicating whether or not a reception contract is made for each of these pieces of information And a plurality of descrambling keys necessary for descrambling these pieces of information, and descrambling using the descrambling key, a plurality of programs sent from the broadcast supply side Receiving means for selectively receiving a predetermined program, first extracting means for extracting a plurality of information from the program received by the receiving means, and whether each of the plurality of information is scrambled First component map Second extracting means for extracting Third extraction means for extracting a second component map indicating whether or not a reception contract is made for each of the plurality of pieces of information; Extracting multiple descrambling keys required when descrambling multiple pieces of information 4 Whether or not a receiving contract is made for each of the plurality of pieces of information extracted by the extracting means and the first extracting means Based on the second component map extracted by the third extraction means The first extracting means for determining and whether the plurality of pieces of information extracted by the first extracting means are scrambled are extracted by the second extracting means. First component map The information determined by the second determination means and the first determination means that the reception contract is made and the second determination means determines that the scramble is applied. No. 4 And descrambling means for performing descrambling processing based on the scramble key extracted by the extracting means.
[0012]
The descrambling method according to claim 3 shows a plurality of programs composed of a plurality of information transmitted from the broadcast supply side, and whether or not each of these pieces of information is scrambled. A first component map, and a second component map indicating whether or not a reception contract is made for each of these pieces of information; In the descrambling method for receiving descrambling, 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. Indicates whether each piece of information is scrambled First component map Extract Extracting a second component map indicating whether or not a reception contract is made for each of the plurality of pieces of information; Whether a receiving contract is made for each of the extracted information Based on the extracted second component map Judgment and whether each of the plurality of extracted information is scrambled is extracted First component map And the descrambling process is performed on the information determined that the reception contract is made and the scrambled information is determined.
[0013]
The descrambling method according to claim 4 shows a plurality of programs composed of a plurality of information transmitted from the broadcast supply side, and whether or not each of these pieces of information is scrambled. A first component map and a second component map indicating whether or not a reception contract is made for each of these pieces of information And a plurality of descrambling keys necessary for descrambling these pieces of information and descrambling using the descrambling key, a plurality of programs sent from the broadcast supply side Selectively receive a predetermined program, extract a plurality of information from the received program, and indicate whether each of the plurality of information is scrambled First component map Extract Extracting a second component map indicating whether or not a reception contract is made for each of the plurality of pieces of information; A plurality of descrambling keys necessary for descrambling each of a plurality of pieces of information are extracted, and whether or not a reception contract is made for each of the plurality of pieces of extracted information. Based on the extracted second component map Determining whether each of the plurality of pieces of information is scrambled, Extracted first component map To perform descrambling processing based on the extracted scramble key for the information that is determined to have been received and the scrambled information is determined. Features.
[0014]
The scrambled broadcast transmission / reception device according to claim 5, a plurality of programs including a plurality of scrambled information transmitted from a broadcast supply side Received at the receiving terminal on the viewer side, In a scrambled broadcast transmitting / receiving apparatus that descrambles a received program, the broadcast supply side indicates whether or not each of a plurality of pieces of information included in the program is scrambled. First component map To the program First Additional means; Second addition means for adding a second component map indicating whether or not a reception contract has been made to each of a plurality of pieces of information included in the program; Indicates whether it is scrambled by additional means A second component map indicating whether or not the first component map is added and a reception contract is made by the second adding means is provided. A receiving means for selectively receiving a predetermined program from the plurality of programs sent from the broadcast supply side; and a receiving means for receiving the plurality of added programs. A first extracting means for extracting a plurality of pieces of information from a program and whether each of the pieces of information is scrambled; First component map Second extracting means for extracting Third extraction means for extracting a second component map indicating whether or not a reception contract is made for each of the plurality of pieces of information; Whether or not a reception contract is made for each of the plurality of pieces of information extracted by the first extraction means. Based on the second component map extracted by the third extraction means The first extracting means for determining and whether the plurality of pieces of information extracted by the first extracting means are scrambled are extracted by the second extracting means. First component map The information determined by the second determination means and the first determination means that the reception contract is made and the second determination means determines that the scramble is applied. And a descrambling means for performing descrambling processing.
[0015]
The scrambled broadcast transmitting / receiving apparatus according to claim 6, a plurality of programs including a plurality of scrambled information transmitted from a broadcast supply side, A first component map indicating whether each of these pieces of information is scrambled; a second component map indicating whether a reception contract is made for each piece of these pieces of information; A scrambled broadcast transmitting / receiving apparatus for receiving a plurality of descrambling keys used for descrambling each of a plurality of pieces of information constituting the plurality of programs at a receiving terminal on the viewer side and descrambling the received programs The broadcast supply side indicates whether or not each of a plurality of pieces of information included in the program is scrambled. First component map First adding means for adding to the program; Second adding means for adding to the program a second component map indicating whether or not a reception contract is made for each of a plurality of pieces of information included in the program; A descrambling key required to descramble each of a plurality of pieces of information constituting a plurality of programs is added to the program. 3 Additional means, First Indicates whether it is scrambled by additional means The first component map is added, the second component map indicating whether or not the reception contract is made by the second adding means, and the data necessary for descrambling by the third adding means. Scramble key A receiving means for selectively receiving a predetermined program from the plurality of programs sent from the broadcast supply side; and a receiving means for receiving the plurality of added programs. A first extracting means for extracting a plurality of pieces of information from a program and whether each of the pieces of information is scrambled; First component map Second extracting means for extracting Third extraction means for extracting a second component map indicating whether or not a reception contract is made for each of the plurality of pieces of information; Extracting multiple descrambling keys required when descrambling each piece of information 4 Whether or not a receiving contract is made for the information extracted by the first extracting means and the information extracted by the first extracting means Based on the second component map extracted by the third extraction means Whether or not the information extracted by the first determination unit and the information extracted by the first extraction unit is scrambled is extracted by the second extraction unit First component map The information determined by the second determination means and the first determination means that the reception contract is made and the second determination means determines that the scramble is applied. The second 4 And descrambling means for performing descrambling processing based on the scramble key extracted by the extracting means.
[0016]
The scramble broadcasting method according to claim 7 is a scramble method in which a receiving terminal on a viewer side receives a plurality of programs including a plurality of scrambled information transmitted from a broadcasting supply side and descrambles the received program. In the broadcasting method, the broadcast supply side indicates whether or not each of a plurality of pieces of information included in the program is scrambled. First component map To the program, A second component map indicating whether or not a reception contract is made for each of a plurality of pieces of information included in the program is added to the program, Indicates whether it is scrambled A second component map indicating whether or not the first component map is added and the reception contract is made is The plurality of added programs are transmitted, 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, Indicates whether each piece of information is scrambled First component map Extract Extracting a second component map indicating whether or not a reception contract is made for each of the plurality of pieces of information; Whether a receiving contract is made for each of the extracted information Based on the extracted second component map Judgment and whether each of the plurality of extracted information is scrambled is extracted First component map And the descrambling process is performed on the information determined that the reception contract is made and the scrambled information is determined.
[0017]
The scramble broadcasting method according to claim 8, wherein a plurality of programs comprising a plurality of scrambled information transmitted from a broadcast supply side, A first component map indicating whether each of these pieces of information is scrambled; a second component map indicating whether a reception contract is made for each piece of these pieces of information; In a scramble broadcasting method of receiving a plurality of descrambling keys used for descrambling each of a plurality of pieces of information constituting a plurality of programs at a receiving terminal on the viewer side and descrambling the received programs The broadcast supply side indicates whether or not each piece of information included in the program is scrambled. First component map To the program, A second component map indicating whether or not a reception contract is made for each of a plurality of pieces of information included in the program is added to the program, A descrambling key necessary for descrambling each of a plurality of pieces of information constituting a plurality of programs is added to the program to indicate whether or not the program is scrambled. A first component map is added, a second component map indicating whether or not a reception contract is made, and a descrambling key necessary for descrambling is provided. The plurality of added programs are transmitted, 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, Indicates whether each piece of information is scrambled First component map Extract Extracting a second component map indicating whether or not a reception contract is made for each of the plurality of pieces of information; Extract multiple descrambling keys required when descrambling each piece of information, and check whether or not a reception contract has been made for the extracted information Based on the extracted second component map Determine whether the extracted information is scrambled or not First component map Scramble processing based on the extracted scramble key for information determined to be received and determined to have been received and scrambled. To do.
[0018]
In the descrambling apparatus according to claim 1, a plurality of programs composed of a plurality of pieces of information transmitted from the broadcast supply side, and whether each of these pieces of information is scrambled are indicated. A first component map, and a second component map indicating whether or not a reception contract is made for each of these pieces of information; In the descrambling device that performs descrambling processing, the receiving means selectively receives a predetermined program from a plurality of programs sent from the broadcast supply side, and the program is received from the program received by the receiving means. One extraction means extracts a plurality of pieces of information and indicates whether each of the pieces of information is scrambled First component map Is extracted by the second extraction means, The third extraction means extracts a second component map indicating whether or not a reception contract is made for each of the plurality of pieces of information, Whether or not a reception contract is made for each of the plurality of pieces of information extracted by the first extraction means. Based on the second component map extracted by the third extraction means Whether or not the plurality of pieces of information extracted by the first extracting unit is determined by the first determining unit is extracted by the second extracting unit. First component map Based on the information, the second determination means determines that the information is determined to have been received by the first determination means and scrambled by the second determination means. Perform descrambling.
[0019]
In the descrambling apparatus according to claim 2, a plurality of programs composed of a plurality of pieces of information transmitted from the broadcast supply side, and whether each of these pieces of information is scrambled are indicated. A first component map and a second component map indicating whether or not a reception contract is made for each of these pieces of information And a plurality of descrambling keys necessary for descrambling these pieces of information, and descrambling using the descrambling key, a plurality of programs sent from the broadcast supply side The receiving means selectively receives a predetermined program, the first extracting means extracts a plurality of information from the program received by the receiving means, and indicates whether each of the plurality of information is scrambled. First component map Is extracted by the second extraction means, The third extraction means extracts a second component map indicating whether or not a reception contract is made for each of the plurality of pieces of information, Multiple descrambling keys required for descrambling multiple information 4 Whether or not a receiving contract is made for each of the plurality of pieces of information extracted by the first extracting means and extracted by the first extracting means. Based on the second component map extracted by the third extraction means Whether or not the plurality of pieces of information extracted by the first extracting unit is determined by the first determining unit is extracted by the second extracting unit. First component map Based on the information, the second determination means determines that the information is determined to have been received by the first determination means and scrambled by the second determination means. No. 4 The descrambling process is performed based on the scramble key extracted by the extraction means.
[0020]
In the descrambling method according to claim 3, 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 indicated. A first component map, and a second component map indicating whether or not a reception contract is made for each of these pieces of information; In the descrambling method for receiving descrambling, 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. Indicates whether each piece of information is scrambled First component map Extract Extracting a second component map indicating whether or not a reception contract is made for each of the plurality of pieces of information; Whether a receiving contract is made for each of the extracted information Based on the extracted second component map Judgment and whether each of the plurality of extracted information is scrambled is extracted First component map And the descrambling process is performed on the information determined that the reception contract is made and the scrambled information is determined.
[0021]
In the descrambling method according to claim 4, a plurality of programs composed of a plurality of pieces of information transmitted from the broadcast supply side, and whether each of these pieces of information is scrambled are indicated. A first component map and a second component map indicating whether or not a reception contract is made for each of these pieces of information And a plurality of descrambling keys necessary for descrambling these pieces of information and descrambling using the descrambling key, a plurality of programs sent from the broadcast supply side Selectively receive a predetermined program, extract a plurality of information from the received program, and indicate whether each of the plurality of information is scrambled First component map Extract Extracting a second component map indicating whether or not a reception contract is made for each of the plurality of pieces of information; A plurality of descrambling keys necessary for descrambling each of a plurality of pieces of information are extracted, and whether or not a reception contract is made for each of the plurality of pieces of extracted information. Based on the extracted second component map Determining whether each of the plurality of pieces of information is scrambled, Extracted first component map Based on the above, the descrambling process is performed based on the extracted scramble key for the information determined that the reception contract has been made and scrambled.
[0022]
In the scrambled broadcast transmitting / receiving apparatus according to claim 5, a plurality of programs composed of a plurality of scrambled information transmitted from the broadcast supply side, Received at the receiving terminal on the viewer side, In a scrambled broadcast transmitting / receiving apparatus that descrambles a received program, the broadcast supply side indicates whether or not each of a plurality of pieces of information included in the program is scrambled. First component map To show First Adding means, For each of a plurality of pieces of information included in the program, a second component map indicating whether or not a reception contract is made is added to the program by the second addition means, Indicates whether it is scrambled by additional means A second component map indicating whether or not the first component map is added and a reception contract is made by the second adding means is provided. The transmission unit transmits the plurality of added programs, and the reception terminal selectively receives the predetermined program from the plurality of programs sent from the broadcast supply side, and receives the program from the program received by the reception unit. The first extracting means extracts a plurality of information and indicates whether each of the plurality of information is scrambled First component map Is extracted by the second extraction means, The third extraction means extracts a second component map indicating whether or not a reception contract is made for each of the plurality of pieces of information, Whether or not a reception contract is made for each of the plurality of pieces of information extracted by the first extraction means. Based on the second component map extracted by the third extraction means Whether or not the plurality of pieces of information extracted by the first extracting unit is determined by the first determining unit is extracted by the second extracting unit. First component map Based on the information, the second determination means determines that the information is determined to have been received by the first determination means and scrambled by the second determination means. Perform descrambling.
[0023]
In the scrambled broadcast transmitting / receiving apparatus according to claim 6, a plurality of programs including a plurality of scrambled information transmitted from the broadcast supply side, A first component map indicating whether each of these pieces of information is scrambled; a second component map indicating whether a reception contract is made for each piece of these pieces of information; A scrambled broadcast transmitting / receiving apparatus for receiving a plurality of descrambling keys used for descrambling each of a plurality of pieces of information constituting the plurality of programs at a receiving terminal on the viewer side and descrambling the received programs The broadcast supply side indicates whether or not each of a plurality of pieces of information included in the program is scrambled. First component map Is added to the program by the first adding means, The second addition means adds a second component map indicating whether or not a reception contract is made to each of a plurality of pieces of information included in the program, A descrambling key necessary for descrambling each of a plurality of pieces of information constituting a plurality of programs is assigned to the program. 3 Is added by First Indicates whether it is scrambled by additional means The first component map is added, the second component map indicating whether or not the reception contract is made by the second adding means, and the data necessary for descrambling by the third adding means. Scramble key The transmitting unit transmits the plurality of added programs, and the receiving terminal selectively receives the predetermined program from the plurality of programs sent from the broadcast supply side, and from the program received by the receiving unit The first extracting means extracts a plurality of information and indicates whether each of the plurality of information is scrambled First component map Is extracted by the second extraction means, The third extraction means extracts a second component map indicating whether or not a reception contract is made for each of the plurality of pieces of information, Multiple descrambling keys required for descrambling each piece of information 4 Whether or not a receiving contract is made for the information extracted by the first extracting means and the information extracted by the first extracting means. Based on the second component map extracted by the third extraction means The first determining means determines whether the information extracted by the first extracting means is scrambled or not and is extracted by the second extracting means. First component map Based on the information, the second determination means determines that the information is determined to have been received by the first determination means and scrambled by the second determination means. The second 4 The descrambling process is performed based on the scramble key extracted by the extraction means.
[0024]
In the scramble broadcasting method according to claim 7, a plurality of programs composed of a plurality of scrambled information transmitted from a broadcast supply side are received by a receiving terminal on the viewer side, and the received program is descrambled. In the scramble broadcasting method, the broadcast supply side indicates whether or not each of a plurality of pieces of information included in the program is scrambled. First component map To the program, A second component map indicating whether or not a reception contract is made for each of a plurality of pieces of information included in the program is added to the program, Indicates whether it is scrambled A second component map indicating whether or not the first component map is added and the reception contract is made is The plurality of added programs are transmitted, 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, Indicates whether each piece of information is scrambled First component map Extract Extracting a second component map indicating whether or not a reception contract is made for each of the plurality of pieces of information; Whether a receiving contract is made for each of the extracted information Based on the extracted second component map Judgment and whether each of the plurality of extracted information is scrambled is extracted First component map And the descrambling process is performed on the information determined that the reception contract is made and the scrambled information is determined.
[0025]
In the scramble broadcasting method according to claim 8, a plurality of programs comprising a plurality of scrambled information transmitted from the broadcast supply side, A first component map indicating whether each of these pieces of information is scrambled; a second component map indicating whether a reception contract is made for each piece of these pieces of information; In a scramble broadcasting method of receiving a plurality of descrambling keys used for descrambling each of a plurality of pieces of information constituting a plurality of programs at a receiving terminal on the viewer side and descrambling the received programs The broadcast supply side indicates whether or not each piece of information included in the program is scrambled. First component map To the program, A second component map indicating whether or not a reception contract is made for each of a plurality of pieces of information included in the program is added to the program, A descrambling key necessary for descrambling each of a plurality of pieces of information constituting a plurality of programs is added to the program to indicate whether or not the program is scrambled. A first component map is added, a second component map indicating whether or not a reception contract is made, and a descrambling key necessary for descrambling is provided. The plurality of added programs are transmitted, 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, Indicates whether each piece of information is scrambled First component map Extract Extracting a second component map indicating whether or not a reception contract is made for each of the plurality of pieces of information; Extract multiple descrambling keys required when descrambling each piece of information, and check whether or not a reception contract has been made for the extracted information Based on the extracted second component map Determine whether the extracted information is scrambled or not First component map Scramble processing is performed based on the extracted scramble key for the information determined that the reception contract has been made and scrambled.
[0026]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a block diagram showing a configuration example of an embodiment of the present invention. This broadcasting system is based on a broadcasting system called scramble broadcasting. In this scrambled broadcasting, the broadcast side intentionally disturbs the original signal in a predetermined way so that even if a person who is not contracted with the broadcasting station receives the broadcast, normal images, sound, data, etc. cannot be used. This is a broadcasting system.
[0027]
Therefore, in this specification, first, the system will be briefly described, and then a data transmission method in the system will be described. Finally, the operation of one embodiment of the present invention based on this system will be described.
[0028]
First, the configuration of the transmission side system will be described.
[0029]
The encoder 1 of the transmission side system digitizes and compresses video signals and audio signals. Multiplexer 2 ( First Additional means , Second 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 related to a program and a scramble key for descrambling, contract information for each subscriber (viewer) (for example, a contract form such as flat viewing and pay-per-view viewing), and a program It shall consist of “individual information” including a contract key for decrypting information (common information).
[0030]
Scrambler 3 (transmission means, first 3 The additional means) selectively scrambles a predetermined one of the output signals from the multiplexer 2 with a scramble key from the related information transmitting apparatus 4 described later.
[0031]
The scramble control system 6 supplies the contract key to the related information transmitting apparatus 4 and encrypts the contract key with an individual key unique to the receiving apparatus (hereinafter referred to as receiving terminal), and the multiplexer 2 as a part of the individual information. It is made to supply to.
[0032]
The related information transmission device 4 supplies the scramble key to the scrambler 3 and encrypts the scramble key with the contract key supplied from the scramble control system 6, and the multiplexer 2 as a part of the common information (program information). It is made to supply to.
[0033]
The program control system 5 generates a predetermined control signal and controls the encoder 1 according to the program. That is, it controls the digitization and compression method. Also, the program ID of the program encoded by the encoder 1 and the channel ID (Service_id) of the corresponding channel are generated and supplied to the related information transmitting 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 contract requests from viewers. The contract information is supplied to the scramble control system 6.
[0034]
Next, the configuration of the receiving terminal will be described.
[0035]
The decoder 21 (receiving means, first extracting means, first determining means, second determining means) of the receiving terminal is supplied from the security module 22 described later by the built-in descrambler 41 (descramble means). Based on the scramble key, the scrambled signal is descrambled to the original signal. Also, individual information and program information added to the program are extracted and output.
[0036]
The security module 22 is composed of, for example, an IC card, stores an individual key unique to the terminal, takes in unscrambled individual information supplied via the decoder 21, decrypts the individual information with the individual key, The contract information is retrieved and stored. Also, common information accompanying the program supplied via the decoder 21 is fetched, the common information is decrypted with the contract key, the scramble key is taken out, and supplied to the decoder 21.
[0037]
The pay confirmation button 23 is for inputting that the viewer purchases the program. Furthermore, the impulse pay-per-view button 24 is a button that is pressed when performing impulse pay-per-view viewing.
[0038]
Subsequently, the operation of the system will be described.
[0039]
First, an operation when individual information is transmitted from the transmission side system to the reception terminal will be described. This individual information includes, for example, a contract key number corresponding to the contract key, a contract key, a channel ID corresponding to the contracted channel, and a contract type. The individual information also includes information corresponding to the ID number of the destination receiving terminal.
[0040]
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 4 bits, for example.
[0041]
This individual information is encrypted in the scramble control system 6 by using a specific key unique to the receiving terminal to which the individual information is to be transmitted. The scramble control system 6 stores, for all receiving terminals, an individual key unique to the receiving terminal corresponding to the ID number of the receiving terminal, and searches for the individual key from the ID number of the receiving terminal of the transmission destination. Can be done. Accordingly, the individual key corresponding to the ID number of the destination receiving terminal is searched, and the individual information is encrypted based on the retrieved key. The encrypted individual information is supplied to the multiplexer 2.
[0042]
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. Thereafter, the scrambler 3 is supplied.
[0043]
The digital signal supplied to the scrambler 3 is scrambled only for the program part (audio data and video data) using the scramble key supplied from the related information sending device 4, and the individual information part is not scrambled, and the transmission path 31.
[0044]
The transmission of the individual information to the receiving terminal is performed as needed when the individual information needs to be updated. This individual information includes the contract information described above.
[0045]
Next, an operation when a normal program and program information added thereto (components of common information) are transmitted from the transmission system to the reception terminal will be described.
[0046]
The program information includes, for example, a contract type, a contract key number indicating a contract key number, an encrypted scramble key, a Service_id corresponding to a channel ID, a program ID for identifying a program, and the like. Further, the contract type includes a flag for identifying whether or not the program is a special program.
[0047]
The predetermined program information having the above-described configuration generated in the related information transmitting device 4 is encrypted with 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 and the program information supplied from the related information transmitting device 4 are time-division multiplexed. , Supplied to the scrambler 3.
[0048]
In the scrambler 3, a compressed video signal or audio signal constituting the program supplied to the scrambler 3 and a digital signal in which program information is time-division multiplexed are programmed by the scramble key supplied from the related information sending device 4 Only the part is scrambled, and the program information part is sent to the transmission line 31 without being scrambled.
[0049]
In this way, a predetermined program and program information associated therewith are transmitted from the transmitting system to the receiving terminal.
[0050]
Next, the operation on the receiving terminal side will be described.
[0051]
FIG. 2 is a diagram for explaining a principle operation in the case where viewing permission is controlled in the receiving terminal. The decoder 21 includes, for example, a descrambler 41, a second decoder 42 (second extraction means, third extraction means). , Fourth extraction means ), And the first decoder 43.
[0052]
The individual information is transmitted to the receiving terminal of the viewer who has formally contracted. When a receiving terminal receives a scrambled predetermined program transmitted via the transmission path 31 and a digital signal in which individual information that has not been scrambled is time-division multiplexed from the transmission side system, it is scrambled. A digital signal corresponding to the program is supplied to the descrambler 41.
[0053]
On the other hand, the individual information that is not scrambled is first compared with the ID number of the receiving terminal added to the non-encrypted part and the ID number of the receiving terminal stored in advance in the security module 22, and the two match. In this case, the first decoder 43 is supplied.
[0054]
The individual information supplied to the first decoder 43 is decrypted with the individual key unique to the receiving terminal stored in the security module 22, and the contract key and the contract information are extracted and stored in the security module 22. This contract key is used for decoding program information to be described later. The contract information is used when determining whether or not the received program is a contracted program.
[0055]
When the viewer is watching the program at the receiving terminal, the receiving terminal receives the scrambled predetermined program transmitted through the transmission path 31 and the program information associated therewith. The digital signal corresponding to the scrambled predetermined program is supplied to the descrambler 41, and the program information associated therewith is supplied to the second decoder.
[0056]
When the contract key corresponding to the channel of the predetermined program is extracted from the individual information already decrypted in the first decryptor 43 and stored in the security module 22 as described above, the second decryptor 42 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 extracted.
[0057]
Next, the program information is read by the security module 22 and collated with the contract information already stored. As a result, when it is recognized that the program to which the program information is added is a contracted program, the scramble key obtained in 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 that can be normally viewed, and then output. .
[0058]
When a predetermined channel is subscribed by flat viewing, individual information including the contract key corresponding to the contracted channel and the contract information including the Service_id corresponding to the channel, the contract type, etc. is transmitted from the transmitting system to the receiving terminal and received. It is stored in the security module 22 constituting the terminal. If there are a large number of contracted channels, the above-described procedure is repeatedly executed.
[0059]
In the case of flat viewing, Service_id in the program information accompanying the received program is stored in the security module 22, and a 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 decoder 42, the obtained scramble key is supplied to the descrambler 41, and the descrambler 41 operates. As a result, video and audio in which a predetermined program is normally descrambled can be obtained, and the program can be viewed.
[0060]
In the case of call-ahead pay-per-view viewing, the viewer first informs the transmitting side in advance that there is a program desired to be viewed by means such as a receiving terminal or a telephone. Next, the transmission side transmits Service_id, the contract key number, the contract key, etc. of the program requested by the viewer as personal information to the receiving terminal. After this procedure, the viewer can view the desired program by operating the pay confirmation button 23 or the like.
[0061]
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 transmitting system to the receiving terminal, and the security module via the decoder 21 22 and stored. This procedure is repeated when there are many programs to be viewed.
[0062]
Thus, in the case of impulse pay-per-view viewing, Service_id in the program information accompanying the received program, the contract key indicated by the contract key number in the program information, and the like are stored in the security module 22. Furthermore, when the viewer performs an operation such as pressing the pay confirmation button 23, the program can be viewed.
[0063]
When pay-per-view (including both call-ahead and impulse) viewing operations are performed, for example, the channel ID (Service_id), program ID (Event_id), component map (Component_map), charge amount (Charge), and A viewing history including viewing time is stored in the security module 22 each time. The viewing information stored in the security module 22 is transmitted to the transmitting system via the telephone line 32 at a predetermined charging cycle, for example, every month. The transmission side system performs a charging process for each reception terminal based on the viewing information transmitted from the reception terminal.
[0064]
This completes the description of the scramble broadcasting system.
[0065]
Next, the data structure when the system transmits data will be described.
[0066]
This system transmits a large number of programs (programs) including a plurality of information such as images, sounds, and data. Such information is divided into a stream (data string) of an appropriate length called a packet and transmitted.
[0067]
FIG. 3 shows a data structure at the time of transmission. A transport packet (hereinafter referred to as a packet) 51 shown in FIG. 3A includes a PID (Packet Identification) 52 and a payload (information) 53 as shown in FIG. 3B. The payload 53 is the entity of information to be transmitted (for example, image data, audio data, etc.), and the PID 52 is an identifier indicating the type of these information (for example, image, audio).
[0068]
When playing a program on the receiving side, first, one is selected from a plurality of programs. Next, a PID of a packet including information (for example, an image, a sound, etc.) necessary for reproducing the program as a payload is obtained. Then, the parameters of these packets are obtained.
[0069]
By the way, these pieces of information necessary for restoring the program are included in the additional information table. FIG. 4 shows the overall structure of the stream including this additional information table. A PAT (Program Association Table) 61 includes program numbers of all programs transmitted via the transmission path 31. A PMT (Program Map Table) 62 exists for each program and includes information for designating a packet necessary for reproducing a specific program.
[0070]
Based on the above information, when reproducing a specific program from a plurality of programs, first, the program number of the program included in PAT61 (PAT is present in the packet of PID = 0) is acquired, The PID specified by the program number (PID = 51 in the case of FIG. 4) is obtained. Subsequently, by referring to the PMT 62 specified by this PID, the receiving terminal can know the packet to be selected from the stream.
[0071]
The PMT 62 includes a program number of a program, a list of PIDs including information such as images and sounds constituting the program, and other attached information. In the example of this figure, PID = "1" represents image information (Video), PID = "2" represents audio information (Audio), and PID = "3" represents a packet containing data (Data). ing. The receiving terminal can select a packet necessary for reproducing the program from the stream (data string) based on these PIDs.
[0072]
A CAT (Conditional Access Table) 63 is a table (packet) that stores PIDs of packets including individual information (hereinafter referred to as EMM (Entitlement Management Message)). In FIG. 4, the CAT 63 includes information (not shown) of PID = “9” for designating the EMM 64. Based on this information, the receiving terminal can select the EMM 64 from the stream. It becomes possible.
[0073]
Further, the PMT 62 has a PID for designating a packet including program information (hereinafter referred to as ECM (Entitlement Control Message)). In the example of FIG. 4, the PMT 62 designates an ECM 65 with PID = “8” as program information.
[0074]
FIG. 5 is a diagram showing the structure of the PMT. In this figure, Program_number 80 is a program number. Further, CA_system_id 81 is an identifier for specifying the type (specifically, manufacturer) of the receiving terminal. The ECM_PID 82 is a PID for designating an ECM 83 that includes program information. The ECM 83 includes a Ks (scramble key) 84 for descrambling the program and a Component_map 85 described later.
[0075]
Stream_type 86, 92, 97, 102 indicates the type of information (image, audio, etc.) of the stream. Furthermore, ES_PID1 to 4 (87, 93, 98, 103) have the PID of the packet in which the respective information is stored, and the receiving terminal specifies the packet based on these. Component_tags 0 to 3 (88, 94, 99, 104) are tags (tags) indicating to which component (output device) of the receiving terminal each packet is output. The receiving terminal determines to which output device each packet is output based on the Component_tag.
[0076]
In this figure, AUDIO 1 (95, 96) is, for example, the main sound, and AUDIO 2 (100, 101) is, for example, the sub sound. Therefore, Stream_type 92 and stream_type 97 are the same AUDIO (voice) information, but each Component_tag is distinguished from Component_tag 1 or Component_tag 2. Therefore, the receiving terminal can determine the decoding method based on the Stream_types 92 and 97, and can determine the output destination of the decoded information based on the Component_tags 94 and 99.
[0077]
FIG. 6 is a diagram showing the structures of EMM and CAT. In the example of this figure, the EMM 124 is specified by the EMM_PID 123 of the CAT 121. The CAT 121 includes the CA_system_id 122 described above and the EMM_PID 123 for designating the EMM. The EMM 124 specified by the CAT 121 includes a Kw (contract key) identification number Kw_No 125 for decrypting the encryption of the common information. In addition, it includes Service_id 127, Event_id 128, and Component_map 126 described later.
[0078]
Next, Component_map will be described.
[0079]
FIG. 7 shows the structure of Component_map. This Component_map is included in both ECM (program information) 83 (Component_map 85) in FIG. 5 and EMM (individual information) 124 (Component_map 126) in FIG. Component_map is composed of a total of 16 bits, bit0 to bit15, and one bit is assigned to one component (output device).
[0080]
In the Component_map 85 included in the ECM 83 in FIG. 5, when information on each component is scrambled, a corresponding bit is turned ON (“1”). For example, in FIG. 7, it is assumed that bit0 corresponds to image information. Then, when the image information is scrambled in the transmission side system, bit0 of Component_map 85 of ECM 83 is turned ON (“1”).
[0081]
FIG. 8 is a flowchart for explaining the processing at this time.
[0082]
In step S1 of FIG. 8, the program control system 5 of the transmission side system initially sets i to 0. 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, and the i-th bit of the component map is turned ON. If it is determined that it is not scrambled, step S3 is skipped and the process proceeds to step S4.
[0083]
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. If it is determined that they are equal, the process is terminated.
[0084]
With the above processing, the component_map 85 of the ECM 83 is turned on in the bit corresponding to the scrambled information.
[0085]
Next, the Component_map 126 of the EMM 124 will be described. In the Component_map 126 of the EMM 124, when the viewer has contracted (authorized) for each piece of information, the corresponding bit is turned ON (“1”). For example, if bit0 of Component_map is image information, and the viewer has a viewing contract for this image information, bit0 is turned ON.
[0086]
FIG. 9 is a flowchart for explaining the processing at this time.
[0087]
In step S11 of FIG. 9, the scramble control system 6 of the transmission side system initializes 0 to i. Subsequently, in step S12, the scramble control system 6 determines whether or not the information output to the i-th component is contracted. If it is determined that the contract is made, the process proceeds to step S13, and the i-th bit of the component map is turned ON. If it is determined that the contract is not made, step S13 is skipped and the process proceeds to step S14.
[0088]
In step S14, 1 is added to the value of i. Subsequently, in step S15, 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 S12 and the same processing is repeated. If it is determined that they are equal, the process is terminated.
[0089]
Through the above processing, the component_map 126 of the EMM 124 turns on the bit corresponding to the contracted information.
[0090]
The component_map 85 of the ECM 83 and the component_map 126 of the EMM 124 obtained by the above processing are added to the packets of the ECM 65 and the EMM 64 shown in FIG. 4 and sent out from the transmission side system to the transmission path 31.
[0091]
The receiving terminal receives these pieces of information and performs the processing described below.
[0092]
FIG. 10 is a flowchart for explaining processing performed at the receiving terminal. In step S21 in this figure, the decoder 21 reads out ECM (program information) from the second decoder 42, and further extracts Component_map1 from this ECM. In step S22, the decoder 21 reads the EMM from the first decoder 43, and extracts Component_map2 from the EMM.
[0093]
Here, in order to distinguish two Component_maps, what is extracted from ECM is defined as Component_map1, and what is extracted from EMM is defined as Component_map2.
[0094]
In step S23, the decoder 21 initializes i to 0. Subsequently, in step S24, the decoder 21 determines whether or not the i-th bit of Component_map1 is 1 and the i-th bit of Component_map2 is 1. If it is determined that the above condition is not satisfied, the process proceeds to step S26, and if it is determined that the condition is satisfied, the process proceeds to step S25.
[0095]
Here, the reason for making such a determination will be described. FIG. 11 shows the relationship between Component_map1, Component_map2, and descrambling operation. If the bit of Component_map1 (Component_map of ECM) is “1”, it indicates that the information sent from the transmission side system is scrambled. In addition, when the bit of Component_map2 (EMM Component_map) is “1”, this indicates that the viewer has contracted for this information.
[0096]
If the Bit of Component_map1 is “0”, this information is not scrambled, so there is no need to descramble. Information that is not scrambled means that it can be used freely, so that the viewer can use this information regardless of whether or not there is a contract.
[0097]
Further, when the bit of Component_map1 is “1”, this means that this information is scrambled. In this case, when the viewer subscribes to this program (the bit of Component_map2 is “1”). Only descramble, and if not contracted, do not descramble.
[0098]
Therefore, in step S24 of FIG. 10, the i-th bit of Component_map1 and the i-th bit of Component_map2 are compared, and only when these bits are determined to be “1”, the process returns to step S25. Then, the information corresponding to the i-th bit of Component_map1 is descrambled.
[0099]
Next, in step S26, 1 is added to the value of i. In step S27, 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 S24 and the same processing is repeated. If it is determined that they are equal, the process is terminated.
[0100]
As a result of the above processing, the viewer can use the information in accordance with the contract state of the individual information.
[0101]
In the above embodiment, only one Ks (scramble key) is included in the ECM. However, it is also possible to assign one Ks to each component to make information protection more stringent.
[0102]
FIG. 12 is a diagram illustrating the structure of the PMT when Ks is assigned to each component. In this figure, the same parts as those in FIG. 5 are denoted by the same reference numerals, and description thereof will be omitted as appropriate.
[0103]
In this figure, the ECM 83 is deleted, and ECM1 to ECM4 are newly added. The ECM1 (132) is added to the image information and includes Ks1 (133) for descrambling the image information. ECM2 (136) and ECM3 (141) are added to the audio information, respectively, and include Ks2 (137) and Ks3 (141) for descrambling the audio information. Finally, ECM4 (145) is added to the data, and Ks4 for descrambling the data is added. In addition, Component_map indicating the type of each information is added to each ECM. Furthermore, in order to designate each ECM, ECM_PID1 (131), ECM_PID2 (135), ECM_PID3 (139), and ECM_PID4 (144) are newly added to the PMT80.
[0104]
Next, processing performed at the receiving terminal when the information shown in FIG. 12 is sent from the transmission side system will be described.
[0105]
FIG. 13 is a flowchart for explaining processing performed by the receiving terminal that has received the information shown in FIG. In step S31 in this figure, the decoder 21 initializes i to 1. Next, in step S32, the decoder 21 reads EMM (individual information) from the first decoder 43, and further extracts Component_map2 from this EMM. In step S33, the decoder 21 reads the i-th ECM from the second decoder 42, and further extracts Component_map1 from this EMM.
[0106]
Now, since i is 1, in step S33, the first ECM (ECM1) is read from the second decoder 42, and Component_map1 is further extracted from this ECM1.
[0107]
In step S34, it is determined whether or not the bit that is “1” in Component_map1 is also “1” in Component_map2. If it is determined that the same bit is not “1”, the process proceeds to step S36, and if it is determined to be “1”, the process proceeds to step S35.
[0108]
In the embodiment of FIG. 12, Component_map1 stored in ECM1 has bit 0 of “1”. Accordingly, if 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.
[0109]
In step S <b> 35, the decoder 21 extracts Ks from the i-th ECM and supplies it to the descrambler 41.
[0110]
Now, since i is 1, Ks1 (133) is extracted from the first ECM (ECM1 (132)) and supplied to the descrambler 41.
[0111]
Next, in step S36, 1 is added to i. In the example of FIG. 12, since the maximum value of ECM is 4 (DATA ECM value), it is determined in step S37 whether the value of i is equal to 5 (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 process is terminated.
[0112]
As a result of this processing, it is possible to extract a scramble key from each piece of information supplied to each component (output device) and perform scramble.
[0113]
In this embodiment, a scramble key is added to each piece of information output to each component. However, for example, it is possible to share the same scramble key for image and sound. In this case, ECM_PID1 and ECM_PID2 have the same value, and the same ECM is designated by these PIDs.
[0114]
As a result of the above processing, not only can a viewing contract be made for each piece of information, but a descrambling key is added to each piece of information, so that the information can be made more strict. It becomes possible to protect.
[0115]
In addition, since the information providing side can charge according to the contract form of the information of each viewer, the viewer only has to pay for the information used (contracted).
[0116]
【The invention's effect】
As described above, according to the descrambling apparatus according to claim 1 and the descrambling method according to claim 3, a predetermined program is selectively received from a plurality of programs sent from the broadcast supply side, Extract multiple pieces of information from the received program and indicate whether each piece of information is scrambled First component map Extract Extracting a second component map indicating whether or not a reception contract is made for each of the plurality of pieces of information; Whether a receiving contract is made for each of the extracted information Based on the extracted second component map Judgment and whether each of the plurality of extracted information is scrambled is extracted First component map As a result, the descrambling process is performed on the information determined to have been received and the scrambled information is determined. Can make a viewing contract.
[0117]
According to the descrambling apparatus according to claim 2 and the descrambling method according to claim 4, a predetermined program is selectively received from a plurality of programs sent from the broadcast supply side, and the received program is received from the received program. Extract multiple pieces of information and indicate whether each piece of information is scrambled First component map Extract Extracting a second component map indicating whether or not a reception contract is made for each of the plurality of pieces of information; A plurality of descrambling keys necessary for descrambling each of a plurality of pieces of information are extracted, and whether or not a reception contract is made for each of the plurality of pieces of extracted information. Based on the extracted second component map Determining whether each of the plurality of pieces of information is scrambled, Extracted first component map To perform descrambling processing based on the extracted scramble key for information that is determined to be a reception contract and that is determined to be scrambled. Therefore, the viewer can not only make a viewing contract for each piece of information constituting the program, but also can protect information more strictly.
[0118]
According to the scrambled broadcast transmitting / receiving apparatus according to claim 5 and the scrambled broadcast method according to claim 7, the broadcast supply side indicates whether or not each of a plurality of pieces of information included in the program is scrambled. First component map To the program, A second component map indicating whether or not a reception contract is made for each of a plurality of pieces of information included in the program is added to the program, Indicates whether it is scrambled A second component map indicating whether or not the first component map is added and the reception contract is made is The plurality of added programs are transmitted, 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, Indicates whether each piece of information is scrambled First component map Extract Extracting a second component map indicating whether or not a reception contract is made for each of the plurality of pieces of information; Whether a receiving contract is made for each of the extracted information Based on the extracted second component map Judgment and whether each of the plurality of extracted information is scrambled is extracted First component map As a result, the descrambling process is performed on the information determined to have been received and the scrambled information is determined. Can make a viewing contract.
[0119]
According to the scrambled broadcast transmitting / receiving apparatus according to claim 6 and the scrambled broadcast method according to claim 8, the broadcast supply side indicates whether or not each of a plurality of pieces of information included in the program is scrambled. First component map To the program, A second component map indicating whether or not a reception contract is made for each of a plurality of pieces of information included in the program is added to the program, A descrambling key necessary for descrambling each of a plurality of pieces of information constituting a plurality of programs is added to the program to indicate whether or not the program is scrambled. A first component map is added, a second component map indicating whether or not a reception contract is made, and a descrambling key necessary for descrambling is provided. The plurality of added programs are transmitted, 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, Indicates whether each piece of information is scrambled First component map Extract Extracting a second component map indicating whether or not a reception contract is made for each of the plurality of pieces of information; Extract multiple descrambling keys required when descrambling each piece of information, and check whether or not a reception contract has been made for the extracted information Based on the extracted second component map Determine whether the extracted information is scrambled or not First component map Because it is determined that the reception contract has been made and the information determined to be scrambled is scrambled based on the extracted scramble key. The viewer can not only make a viewing contract for each piece of information constituting the program, but also protect the information more strictly.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a configuration example of an embodiment of the present invention.
FIG. 2 is a diagram for explaining the principle of operation of a receiving terminal.
FIG. 3 is a diagram illustrating the structure of a stream transmitted from a transmission side system.
FIG. 4 is a diagram illustrating a hierarchical structure of a stream transmitted from a transmission side system.
FIG. 5 is a diagram for explaining a PMT and various packets specified thereby;
FIG. 6 is a diagram for explaining 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 for creating a component map to be added to the ECM.
FIG. 9 is a flowchart illustrating a process for creating a component map to be added to an EMM.
FIG. 10 is a flowchart for describing processing for determining whether to descramble each piece of information when a single scramble key is used.
FIG. 11 is a diagram illustrating a relationship among ECM component map bits, EMM component map bits, and descrambling processing;
FIG. 12 is a diagram illustrating a relationship between a PMT when a plurality of scramble keys are used and various tables specified by the PMT.
FIG. 13 is a flowchart for describing processing for determining whether or not to descramble various information when a plurality of scramble keys are used.
[Explanation of symbols]
1 Encoder
2 Multiplexer (additional means)
3 Scrambler transmission means, second addition means)
4. Related information sending device
5 Program control system
6 Scramble control system
7 Viewing information collection processing system
21 Decoder (receiving means, first extracting means, first determining means, second determining means)
22 Security module
23 Pay confirmation button
24 Impulse pay-per-view button
31 Transmission path
32 Telephone line
41 Descrambler (descramble means)
42 Second decoder (second extraction means, third extraction means)
43 First decoder

Claims (8)

A plurality of programs composed of a plurality of information transmitted from the broadcast supply side, a first component map indicating whether or not each of these pieces of information is scrambled, and each of these pieces of information In a descrambling device that receives a second component map indicating whether or not a reception contract is made and performs a descrambling process,
Receiving means for selectively receiving a predetermined program from the plurality of programs sent from the broadcast supply side;
First extracting means for extracting the plurality of information from the program received by the receiving means;
Second extraction means for extracting a first component map indicating whether each of the plurality of pieces of information is scrambled;
Third extraction means for extracting a second component map indicating whether a reception contract is made for each of the plurality of pieces of information;
It is determined based on the second component map extracted by the third extraction unit whether or not a reception contract is made for each of the plurality of pieces of information extracted by the first extraction unit. First determining means for
Determining whether each of the plurality of pieces of information extracted by the first extraction unit is scrambled based on the first component map extracted by the second extraction unit Second determining means for
A descrambling means for performing a descrambling process on the information determined by the first determination means to be determined that a reception contract has been made and scrambled by the second determination means; A descrambling device comprising: A plurality of programs composed of a plurality of information transmitted from the broadcast supply side, a first component map indicating whether each of these pieces of information is scrambled, and each of these pieces of information A second component map indicating whether or not a reception contract is made and a plurality of descrambling keys necessary for descrambling these pieces of information are received and descrambled using the descrambling key. In the scrambler,
Receiving means for selectively receiving a predetermined program from the plurality of programs sent from the broadcast supply side;
First extracting means for extracting the plurality of information from the program received by the receiving means;
Second extraction means for extracting a first component map indicating whether each of the plurality of pieces of information is scrambled;
Third extraction means for extracting a second component map indicating whether a reception contract is made for each of the plurality of pieces of information;
Fourth extraction means for extracting the plurality of descrambling keys necessary for descrambling the plurality of information;
It is determined based on the second component map extracted by the third extraction unit whether or not a reception contract is made for each of the plurality of pieces of information extracted by the first extraction unit. First determining means for
Determining whether each of the plurality of pieces of information extracted by the first extraction unit is scrambled based on the first component map extracted by the second extraction unit Second determining means for
The fourth extracting unit extracts the information determined to be received by the first determining unit and determined to be scrambled by the second determining unit. A descrambling device comprising: descrambling means for performing descrambling processing based on the scrambled key. A plurality of programs composed of a plurality of information transmitted from the broadcast supply side, a first component map indicating whether or not each of these pieces of information is scrambled, and each of these pieces of information In a descrambling method for receiving a second component map indicating whether or not a reception contract is made and performing a descrambling process,
Selectively receiving a predetermined program from the plurality of programs sent from the broadcast supply side;
Extracting the plurality of information from the received program;
Extracting a first component map indicating whether each of the plurality of information is scrambled;
Extracting a second component map indicating whether or not a reception contract is made for each of the plurality of pieces of information;
It is determined based on the extracted second component map whether or not a reception contract is made for each of the extracted pieces of information,
Determining whether or not each of the extracted pieces of information is scrambled based on the extracted first component map ;
A descrambling method, characterized in that a descrambling process is performed on the information that has been determined that a reception contract has been made and that has been determined to be scrambled. A plurality of programs composed of a plurality of information transmitted from the broadcast supply side, a first component map indicating whether each of these pieces of information is scrambled, and each of these pieces of information A second component map indicating whether or not a reception contract is made and a plurality of descrambling keys necessary for descrambling these pieces of information are received and descrambled using the descrambling key. In the scramble method,
Selectively receiving a predetermined program from the plurality of programs sent from the broadcast supply side;
Extracting the plurality of information from the received program;
Extracting a first component map indicating whether each of the plurality of information is scrambled;
Extracting a second component map indicating whether or not a reception contract is made for each of the plurality of pieces of information;
Extracting the plurality of descrambling keys necessary for descrambling each of the plurality of pieces of information;
It is determined based on the extracted second component map whether or not a reception contract is made for each of the extracted pieces of information,
Determining whether each of the plurality of pieces of information is scrambled based on the extracted first component map ;
A descrambling method characterized in that a descrambling process is performed on the information that is determined to be a reception contract and is determined to be scrambled based on the extracted scramble key. . In a scrambled broadcast transmitting / receiving apparatus for receiving a plurality of programs composed of a plurality of scrambled information transmitted from a broadcast supply side by a receiving terminal on the viewer side and descrambling the received program,
The broadcast supply side
First addition means for adding to the program a first component map indicating whether or not each of the plurality of pieces of information included in the program is scrambled;
Second addition means for adding to the program a second component map indicating whether or not a reception contract is made for each of the plurality of pieces of information included in the program;
A second component map indicating whether the scrambled by the first adding means is added and whether the reception contract is made by the second adding means. Transmitting means for transmitting the plurality of programs to which is added,
The receiving terminal selectively receives a predetermined program from the plurality of programs sent from the broadcast supply side;
First extracting means for extracting the plurality of information from the program received by the receiving means;
Second extraction means for extracting a first component map indicating whether each of the plurality of pieces of information is scrambled;
Third extraction means for extracting a second component map indicating whether a reception contract is made for each of the plurality of pieces of information;
It is determined based on the second component map extracted by the third extraction unit whether or not a reception contract is made for each of the plurality of pieces of information extracted by the first extraction unit. First determining means for
Determining whether each of the plurality of pieces of information extracted by the first extraction unit is scrambled based on the first component map extracted by the second extraction unit Second determining means for
Descrambling means for performing descrambling processing on the information determined by the first determination means to be determined that a reception contract has been made and scrambled by the second determination means; A scrambled broadcast transmission / reception device comprising: A plurality of programs comprising a plurality of scrambled information transmitted from the broadcast supply side , a first component map indicating whether each of these pieces of information is scrambled, and each of these pieces of information A second component map indicating whether or not a reception contract is made, and a plurality of descrambling keys used for descrambling each of a plurality of pieces of information constituting the plurality of programs, In a scrambled broadcast transmission / reception device that receives at a receiving terminal and descrambles the received program,
The broadcast supply side
First addition means for adding to the program a first component map indicating whether or not each of the plurality of pieces of information included in the program is scrambled;
Second addition means for adding to the program a second component map indicating whether or not a reception contract is made for each of the plurality of pieces of information included in the program;
Third adding means for adding a descrambling key necessary for descrambling each of the plurality of pieces of information constituting the plurality of programs to the program;
A first component map indicating whether the scrambled by the first adding means is added, and a second component map indicating whether the reception contract is made by the second adding means is added. And transmitting means for transmitting the plurality of programs to which the descrambling key necessary for descrambling is added by the third adding means ,
The receiving terminal is
Receiving means for selectively receiving a predetermined program from the plurality of programs sent from the broadcast supply side;
First extracting means for extracting the plurality of information from the program received by the receiving means;
Second extraction means for extracting a first component map indicating whether each of the plurality of pieces of information is scrambled;
Third extraction means for extracting a second component map indicating whether a reception contract is made for each of the plurality of pieces of information;
A fourth extraction means for extracting the plurality of descrambling keys necessary for descrambling each of the plurality of pieces of information;
A first determination is made based on the second component map extracted by the third extraction means whether or not a reception contract is made for the information extracted by the first extraction means. A determination means;
A second determining unit that determines whether the information extracted by the first extracting unit is scrambled based on the first component map extracted by the second extracting unit; A determination means;
The information extracted by the fourth extracting means is extracted from the information determined to be received by the first determining means and scrambled by the second determining means. And a descrambling means for performing descrambling processing based on the scramble key. In a scramble broadcasting method of 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 descrambling the received program,
The broadcast supply side
For each of the plurality of information included in the program, a first component map indicating whether or not the information is scrambled is added to the program,
A second component map indicating whether a reception contract is made for each of the plurality of pieces of information included in the program is added to the program,
Transmitting the plurality of programs to which the first component map indicating whether or not the scrambled is added and the second component map indicating whether or not the reception contract is made is added;
The receiving terminal selectively receives a predetermined program from the plurality of programs sent from the broadcast supply side,
Extracting the plurality of information from the received program;
Extracting a first component map indicating whether each of the plurality of information is scrambled;
Extracting a second component map indicating whether or not a reception contract is made for each of the plurality of pieces of information;
It is determined based on the extracted second component map whether or not a reception contract is made for each of the extracted pieces of information,
Determining whether or not each of the extracted pieces of information is scrambled based on the extracted first component map ;
A scramble broadcasting method, characterized in that a descrambling process is performed on the information that is determined to be a reception contract and is determined to be scrambled. A plurality of programs comprising a plurality of scrambled information transmitted from the broadcast supply side , a first component map indicating whether each of these pieces of information is scrambled, and each of these pieces of information A second component map indicating whether or not a reception contract is made, and a plurality of descrambling keys used for descrambling each of a plurality of pieces of information constituting the plurality of programs, In a scramble broadcasting method for receiving at a receiving terminal and descrambling the received program,
The broadcast supply side
For each of the plurality of information included in the program, a first component map indicating whether or not the information is scrambled is added to the program,
A second component map indicating whether a reception contract is made for each of the plurality of pieces of information included in the program is added to the program,
Adding a descrambling key necessary for descrambling each of a plurality of pieces of information constituting the plurality of programs to the program;
A first component map indicating whether or not the data is scrambled is added, a second component map indicating whether or not the reception contract is made, and descrambling necessary for the descrambling Sending the plurality of programs to which a key is attached;
The receiving terminal is
Selectively receiving a predetermined program from the plurality of programs sent from the broadcast supply side;
Extracting the plurality of information from the received program;
Extracting a first component map indicating whether each of the plurality of information is scrambled;
Extracting a second component map indicating whether or not a reception contract is made for each of the plurality of pieces of information;
Extracting the plurality of descrambling keys necessary for descrambling each of the plurality of pieces of information;
It is determined whether or not a reception contract is made for the extracted information based on the extracted second component map ,
Determining whether or not the extracted information is scrambled based on the extracted first component map ;
A scramble broadcasting method, characterized in that a scramble process is performed based on an extracted scramble key for the information that is determined to be a reception contract and is determined to be scrambled.

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