JP3613791B2 - Conditional reception system in television - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a conditional access system in a television, and in particular, uses program content including data broadcasting of digital broadcasting typified by satellite digital broadcasting, etc., and conceals part or all of the program content from viewers. The present invention provides a limited reception mechanism in which only a viewer permitted by a station can view a concealed content.
[0002]
[Prior art]
The limited reception mechanism in digital broadcasting has already been put into practical use in digital CS broadcasting, digital BS broadcasting, digital CATV, and the like.
For more convenient use of the limited reception method and the mechanism of the receiver that realizes it, Japanese Patent Application Laid-Open No. 10-178629 “Limited Reception Broadcast Reception Device”, Japanese Patent Application Laid-Open No. 10-174081 “Limited Reception Method and Limited Transmission / Reception Method, and Numerous inventions have been made, as typified by “limited transmission device and limited reception device”, Japanese Patent Laid-Open No. 2001-111980 “digital broadcast reception device”, and the like.
Further, as in the embodiment of the present invention, an invention such as Japanese Patent Application Laid-Open No. 10-290222 “Information Decoding Device and Method and Information Transmitting / Receiving Device” is applied to a type of conditional access system that acquires key information using a communication line Has also been devised.
[0003]
[Problems to be solved by the invention]
However, as disclosed in Japanese Patent Application Laid-Open No. 10-178629 “Limited Reception Broadcast Reception Device” and Japanese Patent Application Laid-Open No. 10-174081 “Limited Reception Method and Limited Transmission / Reception Method, Limited Reception Transmission Device and Limited Reception Device”. The type of limited reception system is an embodiment in which a digital broadcast content transmitted by being subjected to scramble processing as a whole is subjected to unlocking processing using an IC card mounted on the receiver, and can be viewed only by a contractor. It is necessary for the broadcasting station to prepare key information for individual programs and viewer contract information and broadcast it, or to scramble the program content, etc. There is also a need for a mechanism for canceling scramble, etc., on the broadcast station side. Also on the machine side, it was necessary to significant cost burden.
Basically, the limited reception mechanism currently used is basically limited reception in units of programs and channels.
[0004]
In Japanese Patent Application Laid-Open No. 10-290222 “Information Decoding Device and Method and Information Transmitting / Receiving Device” in the prior art, an invention for realizing limited reception in units of programs and channels in units of fine data has been made.
However, even with this method, it is difficult to flexibly operate fine control such as controlling the viewing of only a certain page, certain image, and certain character string in the data broadcast, and there are facilities for realizing it. It was a big one.
[0005]
In view of the above-mentioned problems of the prior art, the present invention does not require a large amount of hardware resources and software resources, and does not impose cost burdens on both the broadcasting station side and the receiver side. The purpose is to provide a system.
In addition, the present invention flexibly operates fine control such as controlling the viewing of only “specific pages”, “specific images”, and “specific character strings” in data broadcasting with relatively simple equipment. An object of the present invention is to provide a conditional access system in a possible television.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, the first invention of the present application is a broadcasting means for broadcasting program content including data broadcasting to a plurality of viewers, and receiving the broadcast program content and presenting it to the viewer. In a conditional access system in a television having a receiving apparatus having a unique management number or symbol (A), the viewer can receive a personal identification number or symbol by a combination of arbitrary characters and numbers when viewing the program content. When an input means for inputting and a viewer who desires to view the program content input characters or numbers (Bi) using the input means for the program content based on the password or symbol (B) obtained in advance , (A), (B), and (Bi) that perform arithmetic processing based on an arithmetic expression specific to program content using at least one of them. And a determination means for determining whether (Bi) is correct or not based on the result of the arithmetic processing, and a providing means for providing the subsequent program content to the viewer only when (Bi) is correct. To do.
[0007]
The conditional access system in the television performs a calculation process using a management number or a symbol (A) unique to a receiver owned by the viewer based on a calculation formula specific to the program content in response to the viewer's viewing request. It is preferable to include a calculation means and a password number providing means for providing the viewer with the password or symbol (B) derived by the calculation process online or offline.
[0008]
Also, the limited reception system in a television which is the second invention of the present application is a broadcast which broadcasts program content including data broadcasts to a plurality of viewers and key information (C ′) used for viewing the program content. Means, a receiving apparatus having a unique management number or symbol (A ′) capable of receiving broadcasted program content and key information (C ′) and presenting the program content to the viewer, and viewing the program content Based on the input means for the viewer to input a personal identification number or symbol by a combination of arbitrary characters and numbers, and the personal identification number or symbol (B ′) obtained in advance by the viewer who wishes to view the program content When characters or numbers (Bi ′) are input to the content using the input means, any one or more of (A ′), (B ′), (Bi ′), and key information (C ′) Only when the calculation means for executing calculation processing based on the calculation formula specific to the program content used, the determination means for determining whether (Bi ′) is correct based on the result of the calculation processing, and when (Bi ′) is correct Providing means for providing the program content to the viewer.
[0009]
In the conditional access system in the above-mentioned television, it is preferable that the key information (C ′) is transmitted by being included in message information (event message) for causing an interruption event in the data broadcast content.
The conditional access system in the television described above performs arithmetic processing using a management number or a symbol (A ′) unique to the receiver owned by the viewer in response to the viewing request of the viewer based on an arithmetic expression specific to the program content. It is preferable to include a calculation means for performing, and a password number providing means for providing the viewer with the password or symbol (B ′) derived by the calculation processing online or offline.
[0010]
Furthermore, the limited reception system in the television which is the third invention of the present application receives a viewing request signal from a viewer through a broadcasting means for broadcasting program content including data broadcasting to a plurality of viewers, and a communication line, Key information generating / transmitting means for transmitting key information for viewing the program content, and a unique management number or symbol (A ″) that can receive the broadcast program content and present it to the viewer When a viewer who owns the receiving device wants to view a specific program content, a viewing request signal is transmitted to the key information generating / transmitting means via a communication line before viewing the program content or during viewing the program content. Transmitting means for transmitting, storage means for storing the key information (Ci ″) sent in response to the viewing request signal in the nonvolatile memory, and stored By referring to read information (Ci ") in the program content, characterized by comprising a releasing means for releasing the parental lock for program content.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
<First Embodiment>
The first embodiment of the present invention will be described in detail with reference to FIG. 1, FIG. 4, FIG. 5, and FIG.
FIG. 1 is an overall configuration diagram illustrating a first embodiment of the present invention, FIG. 4 is a functional block diagram of a receiver illustrating the embodiment of the present invention, and FIG. 5 is a first block diagram of the present invention. It is a flowchart explaining the viewing-and-listening application reception part of a program among the embodiment. FIG. 8 is a flowchart for explaining a portion of the first embodiment of the present invention in which viewing of the program is permitted only when the password is normally input in the program.
[0012]
First, the viewer (101 in FIG. 1) is provided to the broadcasting station (102 in FIG. 1), a number unique to the television broadcast receiving apparatus (103 in FIG. 1) (in this embodiment, the receiver). Along with the information (104 in FIG. 1) of the ID number of a certain IC card), the fact that the user wants to view the program is delivered.
In the present embodiment, the viewer uses the personal computer (105 in FIG. 1) to access the personal identification number providing means (homepage) installed on the Internet (106 in FIG. 1) by the broadcasting station. Exchange information.
This means that payment for viewing programs can be settled at the same time by using a billing system using the Internet, such as credit card payment by entering a credit card number or bank account settlement, and charging at the same time as providing a PIN. It shows that there is merit.
[0013]
FIG. 5 shows the flow of processing of the password providing means (107 in FIG. 1) connected to the Internet.
The password providing means (107 in FIG. 1) in the broadcasting station allows the viewer to view the program by inputting the IC card ID number “A” (process 501 in FIG. 5) input from the viewer. It is determined by searching “A” in the subscriber database whether or not it is a possible subscriber (process 502 in FIG. 5).
[0014]
If “A” does not exist in the subscriber database, it informs that only the subscriber can provide the personal identification number (process 503 in FIG. 5). If “A” exists in the subscriber database, the program-specific operation f (A) is performed from “A” to derive the password “B” (process 504 in FIG. 5), and the value is given to the viewer. Present (process 505 in FIG. 5). Through the processing as described above, the viewer obtains the personal identification number of the program desired to be viewed.
In the case of this example, the viewer has obtained the personal identification number from the personal identification number providing means connected to the Internet. However, it is obvious that this method can also be realized by using another means such as a postcard or a telephone. .
[0015]
Next, the viewer receives the actual broadcast. A broadcast station (102 in FIG. 1) broadcasts program content (108 in FIG. 1) using a broadcast satellite (109 in FIG. 1). The broadcast program content is received by a receiving antenna (110 in FIG. 1), signal-processed by a receiving device (103 in FIG. 1), and presented to a viewer using a television (111 in FIG. 1). Program content is designed so that no one can view it, but the content requires a password to be entered from a certain part, and if the correct password is not entered, no further viewing is possible. .
[0016]
FIG. 8 shows a flow of processing of a part for performing limited reception by determining a personal identification number in program content.
The program content that performs limited reception using the present invention acquires a receiver-specific number (card ID number in this embodiment) “A” before determining limited reception (in FIG. 8). Process 801). When the concealed page is presented to the viewer by limited reception, the program content first requests the viewer to input a password (process 802 in FIG. 8). The viewer inputs the character or number “Bi” based on the password obtained in advance by the input means (112 in FIG. 1). For the program content, the code number “B” is derived from the read card ID number using the calculation for generating the code number (process 803 in FIG. 8). The program content (data broadcast content) is compared with the input personal identification number “Bi” and the personal identification number “B” obtained by calculation (process 804 in FIG. 8). Therefore, it is shown to the viewer that it cannot be viewed (process 805 in FIG. 8), and the subsequent program is presented to the viewer only when it is correct (process 806 in FIG. 8).
[0017]
Next, an example of the flow of signal processing in the receiving apparatus when viewing a program in the present embodiment will be described with reference to FIG.
Broadcast waves including program content are received using an antenna (401 in FIG. 4) and input to an antenna input unit of a receiving apparatus (402 in FIG. 4). The broadcast wave signal including the input program content is extracted as a signal having a frequency including the content by the tuner unit (403 in FIG. 4) in the receiving device, and demodulated by the demodulation unit (404 in FIG. 4). The video / audio stream and the data stream are separated by the TS decoding unit (405 in FIG. 4), and the video and audio streams are processed by the AV decoding unit (406 in FIG. 4) and output as audio and video signals, respectively. And viewed on the connected television (413 in FIG. 4). The data stream is processed as data by the CPU (407 in FIG. 4) and stored in the memory (408 in FIG. 4). The data stored in the memory includes the data broadcast portion of the program content, and the data broadcast portion describes the conditional access processing that implements the present invention illustrated in FIG.
[0018]
The card ID number of the IC card (410 in FIG. 4) is read by the IC card I / F unit (411 in FIG. 4), and the viewer inputs it with the input device (in this example, the remote control = 413 in FIG. 4). The obtained password is read by the infrared I / F unit (414 in FIG. 4). The card ID number and the password are calculated by the CPU, and only when it is determined that the password is correct, the subsequent program is output from the receiving device via the AV decoding unit under the control of the CPU.
In this embodiment, the television receiver has been described in the form of an external tuner. However, it is obvious that the present invention can be implemented even when a television integrated tuner is used.
[0019]
In the case of the present embodiment, the program content uses a calculation that generates a password from the read card ID number, derives the password, compares it with the password entered by the viewer, and corrects the password. Although it is determined, the number of the card ID value is calculated from the password number input by the viewer using the calculation opposite to the calculation for generating the password, and the actual card ID number in the receiver is calculated. It is obvious that the present invention can be realized by using another method based on a combination of these parameters, such as a method for comparing whether the password is correct or not.
[0020]
Through the processing as described above, a viewer who has already subscribed to the program can view the program by a simple operation of inputting a password in the program. In addition, since viewers who have not subscribed to the program do not know the personal identification number, they cannot naturally view it.
Even if a subscriber who has been presented with a personal identification number tells the personal identification number to another person, since it is a personal identification number corresponding to the ID number unique to the receiver, viewers with different receivers may have the same program. Even if you enter the password you have been told, you cannot view it because the combination with the ID number of the receiver is incorrect.
[0021]
<Second Embodiment>
The second embodiment of the present invention will be described in detail with reference to FIG. 2, FIG. 4, FIG. 6, and FIG.
FIG. 2 is an overall configuration diagram illustrating a second embodiment of the present invention, FIG. 4 is an example of a receiver configuration illustrating the embodiment of the present invention, and FIG. 6 is a second embodiment of the present invention. It is a flowchart explaining the viewing-and-listening application reception part of a program among the forms. FIG. 9 is a flowchart for explaining a portion of the second embodiment of the present invention that permits viewing of a program only when the password is normally input in the program.
First, the viewer (201 in FIG. 2) is provided to the receiver (202 in FIG. 2) with a unique number (203 in FIG. 2) for the broadcasting station (202 in FIG. 2). Along with information (204 in FIG. 2) of information (card ID number of a certain IC card), a message that the user wants to view the program is delivered.
[0022]
In the case of the present embodiment, the viewer uses a personal computer (205 in FIG. 2) to access the personal identification number providing means (homepage) installed on the Internet (206 in FIG. 2) by the broadcasting station. Exchange the above information.
This means that payment for viewing programs can be settled at the same time by using a billing system using the Internet, such as credit card payment by entering a credit card number or bank account settlement, and charging at the same time as providing a PIN. It shows that there is merit.
[0023]
FIG. 6 shows the flow of processing of the password providing means (207 in FIG. 2) connected to the Internet.
The password providing means in the broadcasting station is a subscriber who can view the program by the input of the IC card ID number “A ′” input from the viewer (process 601 in FIG. 6). It is determined by searching “A ′” in the subscriber database (process 602 in FIG. 6).
[0024]
If “A ′” does not exist in the subscriber database, it informs that only the subscriber can provide the password (process 603 in FIG. 6). If “A ′” exists in the subscriber database, the key information “C ′” of the program is read (process 604 in FIG. 6), and a preset operation f is obtained from “A ′” and “C ′”. (A ′, C ′) is performed, the password “B ′” is derived (process 605 in FIG. 6), and the value is presented to the viewer (process 606 in FIG. 6).
Through the processing as described above, the viewer obtains the personal identification number of the program desired to be viewed. In this example, the viewer has obtained the personal identification number from the personal identification number providing means connected to the Internet. However, it is obvious that the method can be realized by using another means such as a postcard or a telephone. .
[0025]
Next, the viewer receives the actual broadcast. The broadcast station broadcasts program content (208 in FIG. 2) using a broadcast satellite (210 in FIG. 2). The broadcast program content is received by a receiving antenna (211 in FIG. 2), signal-processed by a receiving device (203 in FIG. 2), and presented to a viewer using a television (212 in FIG. 2). Program content is designed so that no one can view it, but the content requires a password to be entered from a certain part, and if the correct password is not entered, no further viewing is possible. .
[0026]
FIG. 9 shows a flow of processing of a part for performing limited reception by determining a personal identification number in program content.
The program content to be subjected to limited reception using the present invention includes the key information “C ′” transmitted from the broadcast station by the event message and the receiver-specific number (in the case of the present embodiment) before determining the limited reception. , Card ID number) “A ′” is acquired (processes 901 and 902 in FIG. 9).
When the concealed page is presented to the viewer by limited reception, the program content first requests the viewer to input a password (process 903 in FIG. 9). The viewer inputs the character or number “Bi ′” based on the password acquired in advance by the input means (213 in FIG. 2).
[0027]
The program content derives the key information “c” from the input password number value and the card ID number of the receiver by using a calculation opposite to the calculation for generating the password number (process 904 in FIG. 9).
The program content compares the key information “c” derived from the input personal identification number with the key information “C ′” transmitted by the event message (process 905 in FIG. 9). Since the number is incorrect, it is shown to the viewer that it cannot be viewed (process 906 in FIG. 9), and the subsequent program is presented to the viewer only when it is correct (process 907 in FIG. 9).
[0028]
Next, an example of the flow of signal processing in the receiving apparatus when viewing a program in the present embodiment will be described with reference to FIG.
Broadcast waves including program content and key information are received using an antenna (401 in FIG. 4) and input to the antenna input unit of the receiving apparatus (402 in FIG. 4). The input broadcast wave signal including program content and key information is extracted as a signal having a frequency including the content and key information by a tuner unit (403 in FIG. 4) in the receiving apparatus, and demodulating unit (404 in FIG. 4). After being demodulated at, the TS decoding unit (405 in FIG. 4) separates the video and audio streams into the data stream, and the video and audio streams are processed by the AV decoding unit (406 in FIG. 4). Are output as video signals and viewed on a connected television (413 in FIG. 4). The data stream is processed as data by the CPU (407 in FIG. 4) and stored in the memory (408 in FIG. 4). The data stored in the memory includes the data broadcast part of the program content and key information. In the data broadcast part, the conditional access process for realizing the present invention illustrated in FIG. 9 is described. ing.
[0029]
The card ID number of the IC card (410 in FIG. 4) is read by the IC card I / F unit (411 in FIG. 4), and the viewer inputs it with the input device (in this example, the remote control = 413 in FIG. 4). The obtained password is read by the infrared I / F unit (414 in FIG. 4). The card ID number, personal identification number, and key information are calculated by the CPU, and only when the personal identification number is determined to be correct, the subsequent program is output from the receiving device via the AV decoding unit under the control of the CPU. The
In this embodiment, the television receiver has been described as an external tuner. However, it is obvious that the present invention can be implemented even when a television integrated tuner is used.
[0030]
In the case of the present embodiment, the program content is derived from the input password value and the card ID number of the receiver using the reverse operation to the operation that generated the password, to derive key information, Compared with the sent key information, the correctness / incorrectness of the personal identification number was determined, but using the calculation that generated the personal identification number from the card ID number of the receiver and the value of the key information sent in the event message. It is obvious that the present invention can be realized by using another method based on a combination of these parameters, such as a method of obtaining the password and determining whether the password entered by the viewer is correct or incorrect.
[0031]
Through the processing as described above, a viewer who has already subscribed to the program can view the program by a simple operation of inputting a password in the program. In addition, since viewers who have not subscribed to the program do not know the personal identification number, they cannot naturally view it.
Even if a subscriber who has been presented with a personal identification number tells the personal identification number to another person, since it is a personal identification number corresponding to the ID number unique to the receiver, viewers with different receivers may have the same program. Even if you enter the password you have been told, you cannot view it because the combination with the ID number of the receiver is incorrect.
[0032]
<Third Embodiment>
The third embodiment of the present invention will be described in detail with reference to FIG. 3, FIG. 4, FIG. 7, and FIG. FIG. 6 is an overall configuration diagram for explaining the third embodiment of the present invention, FIG. 4 is an example of a receiver configuration for explaining the embodiment of the present invention, and FIG. 7 is a third embodiment of the present invention. It is a flowchart explaining the viewing-and-listening application reception part of a program among the forms. FIG. 10 is a flowchart for explaining a portion of the third embodiment of the present invention in which viewing of a program is permitted only when it is determined that the viewer is permitted to view the program. is there.
[0033]
First, a viewer (301 in FIG. 3) makes a line (302) to a broadcasting station (302 in FIG. 3) by an application provided in the receiver or an application described in a data broadcasting format in program content. In this embodiment, the connection is made using the public line = 303 in FIG. 3 (process 701 in FIG. 7). Next, with the information “A” ”(304 in FIG. 3) of the number unique to the receiver of the television broadcast (in this embodiment, the ID number of the IC card provided in the receiver), the program is displayed. Information (viewing request) indicating that viewing is desired is transmitted.
[0034]
The key information generation / transmission means (305 in FIG. 3) at the broadcasting station receives the IC card ID number “A” ”of the viewer (process 702 in FIG. 7) and stores it in the subscriber database of the program desired to be viewed. It is checked whether or not it exists (process 703 in FIG. 7), and it is determined whether or not the viewer who has requested viewing is a subscriber who can view the program.
[0035]
If it is not a subscriber, the fact that the subscriber authentication has failed is presented to the viewer (process 704 in FIG. 7). If the subscriber is a subscriber, the IC card ID number “A” ”is used for the subscriber's receiving device, and the key information“ Ci ”” (in FIG. 3) is calculated by the calculation method f (A ″) unique to the program. 306) is derived (process 705 in FIG. 7), transmitted to the receiving apparatus (310 in FIG. 3) (process 706 in FIG. 7), and the line is disconnected (process 707 in FIG. 7).
The receiving device (310 in FIG. 3) stores the received key information “Ci” in its own nonvolatile memory.
[0036]
Next, the viewer receives the actual broadcast.
The broadcast station broadcasts program content (307 in FIG. 3) using a broadcast satellite (308 in FIG. 3). The program content is received by the receiving antenna (309 in FIG. 3), signal-processed by the receiving device (310 in FIG. 3), and presented to the viewer using the television (311 in FIG. 3).
[0037]
Anyone can view the program content up to a certain part, but the content reads the card ID number “A” ”of the receiver and the key information“ Ci ”in the nonvolatile memory from the certain part (the processing in FIG. 10). 1001, 1002), it is determined whether or not the key information “C” ”(process 1003 in FIG. 10) obtained by the calculation method f (A ″) unique to the program matches the key information“ Ci ”” in the nonvolatile memory. However, if they do not match, the content cannot be viewed (processing 1005 in FIG. 10). Only when they match (in the case of a receiver in which key information is normally written), the subsequent contents can be viewed (process 1006 in FIG. 10).
[0038]
Next, an example of the flow of signal processing in the receiving apparatus when viewing a program in the present embodiment will be described with reference to FIG.
Broadcast waves including program content are received using an antenna (401 in FIG. 4) and input to an antenna input unit of a receiving apparatus (402 in FIG. 4). The broadcast wave signal including the input program content is extracted as a signal having a frequency including the content by the tuner unit (403 in FIG. 4) in the receiving device, and demodulated by the demodulation unit (404 in FIG. 4). The video / audio stream and the data stream are separated by the TS decoding unit (405 in FIG. 4), and the video and audio streams are processed by the AV decoding unit (406 in FIG. 4) and output as audio and video signals, respectively. And viewed on the connected television (413 in FIG. 4). The data stream is processed as data by the CPU (407 in FIG. 4) and stored in the memory (408 in FIG. 4). The data stored in the memory includes a data broadcast part of the program content. In the data broadcast part, the program viewing application process for realizing the present invention illustrated in FIG. 7 and the data broadcast part illustrated in FIG. The conditional access process for realizing the present invention is described.
[0039]
The card ID number of the IC card (410 in FIG. 4) is read by the IC card I / F unit (411 in FIG. 4), and key information is generated and transmitted via a public line using a modem (412 in FIG. 4). Sent to the means. The key information for program viewing generated by the key information generating / transmitting means is similarly returned to the receiving apparatus (402 in FIG. 4) using a modem via a public line, and is stored in a nonvolatile memory (409 in FIG. 4). Saved in. The combination of the key information written in the non-volatile memory and the card ID number is calculated by the CPU in the program, and only when it is determined that the key information is correct, the subsequent program can control the AV decoding unit under the control of the CPU. Output from the receiving device.
In this embodiment, the television receiver has been described in the form of an external tuner. However, it is obvious that the present invention can be implemented even when a television integrated tuner is used.
[0040]
Through the processing as described above, a viewer who has already subscribed to the program can view the program only by obtaining key information from the broadcasting station in advance. In addition, since viewers who have not subscribed to the program cannot obtain the key information, they cannot naturally view the program.
Even if the subscriber who obtained the key information lends the IC card to another person, since the key information corresponding to the ID number unique to the receiver is stored in the receiver, the receiver in which a different card is inserted Even if a viewer who has a card is loaned a card from a subscriber and views the same program, the combination of the receiver and the card ID number cannot be viewed because the combination of the receiver and the card ID number is incorrect.
[0041]
【The invention's effect】
As described above, according to the present invention, there is provided a conditional access system in a television that does not require a large amount of hardware resources and software resources and does not place a cost burden on either the broadcasting station side or the receiver side. be able to.
In addition, a television that can flexibly operate fine control such as controlling the viewing of only “specific pages”, “specific images”, and “specific character strings” in data broadcasting with relatively simple equipment. Can provide a conditional access system.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram illustrating a first embodiment of the present invention.
FIG. 2 is an overall configuration diagram illustrating a second embodiment of the present invention.
FIG. 3 is an overall configuration diagram illustrating a third embodiment of the present invention.
FIG. 4 is a functional block diagram of a receiving apparatus according to an embodiment of the present invention.
FIG. 5 is a flowchart for explaining the first embodiment of the present invention;
FIG. 6 is a flowchart for explaining a second embodiment of the present invention.
FIG. 7 is a flowchart for explaining a third embodiment of the present invention;
FIG. 8 is a flowchart for explaining the first embodiment of the present invention;
FIG. 9 is a flowchart for explaining a second embodiment of the present invention.
FIG. 10 is a flowchart for explaining a third embodiment of the present invention;
[Explanation of symbols]
101, 201, 301 Viewer
102, 202, 302 broadcast station
103, 203, 310 Receiver
104, 204, 304 IC card number
105,205 PC
106,206 Internet
303 Public line
107, 207, 305 PIN code providing means
108, 208, 307 Program content
209,306 Key information
109,210,308 satellites
110, 211, 309 receiving antenna
111, 212, 311 TV
112,213 input means
113,214 PIN

Claims (6)

Broadcast means for broadcasting program content including data broadcasts to a plurality of viewers, and having a unique management number or symbol (A) that can receive the broadcast program content and present it to the viewer In a limited reception system in a television having a receiving device,
When the program content is viewed, an input means for the viewer to input a personal identification number or symbol using a combination of arbitrary letters and numbers,
A viewer who desires to view the program content can obtain the input means for the program content based on the password or symbol (B) obtained in advance from (A) by the calculation formula specific to the program content and obtained in advance. Used to enter letters or numbers (Bi)
Operating means for executing arithmetic processing for guiding the (B) based on said program content specific calculation equation using said (A),
Determination means for determining correctness of said input (Bi) based on the result of the arithmetic processing,
Only in the case where (Bi) is correct, a conditional access system in a television comprising provision means for providing subsequent program contents to the viewer. In the limited reception system in the television according to claim 1,
To viewer viewing request, calculating means for pre-Symbol calculation processing using the (A), carried out on the basis of the program content specific arithmetic expression,
Conditional access system in a television, characterized in that it comprises the derived by the arithmetic processing (B), and a personal identification number providing means for providing the viewer on-line or off-line. In a conditional access system in television,
Broadcasting means for broadcasting program content including data broadcasting to a plurality of viewers and key information (C ′) used for viewing the program content;
A receiving device having a unique management number or symbol (A ′) capable of receiving the broadcast program content and the key information (C ′) and presenting the program content to a viewer;
An input means for allowing a viewer to input a personal identification number or symbol by a combination of arbitrary letters and numbers when viewing the program content;
A viewer who wishes to view the program content obtains the personal identification number or symbol (B ′) obtained in advance from the (A ′) and the key information (C ′) by an arithmetic expression specific to the program content and obtained in advance. Based on the input of letters or numbers (Bi ') using the input means for the program content,
Wherein the (A '), and the (Bi' calculating unit for performing arithmetic processing for guiding) the program content specific arithmetic expression Based on calculation results using (c),
Determination means for determining whether the input (Bi ′) is correct by checking the key information (C ′) and the calculation result (c) ;
Only in the case where (Bi ′) is correct, the conditional access system for television is provided with provision means for providing the viewer with the program content thereafter. In the limited reception system in the television according to claim 3,
A conditional access system in a television, wherein the key information (C ') is included and transmitted in message information (event message) for causing an interruption event in data broadcasting content. In the conditional access system in the television of Claim 3 or 4,
To viewer viewing request, and calculating means said for the computation processing using the (A ') and said key information (C'), carried out on the basis of the program content specific arithmetic expression,
Conditional access system in a television, characterized in that it comprises the derived by the arithmetic processing (B '), and a personal identification number providing means for providing the viewer on-line or off-line. In a conditional access system in television,
Broadcasting means for broadcasting program content including data broadcasting to a plurality of viewers;
Key information generating / transmitting means for receiving a viewing request signal from a viewer through a communication line and transmitting key information for viewing program content;
A receiving device having a unique management number or symbol (A ″) capable of receiving the broadcast program content and presenting it to the viewer;
When a viewer who owns the receiving device wants to view a specific program content,
Transmitting means for transmitting a viewing request signal to the key information generating / transmitting means through a communication line in addition to (A ″) before or during viewing of the program content;
Storage means for storing in the nonvolatile memory the key information (Ci ″) obtained and sent from the (A ″) in response to the viewing request signal by a calculation formula specific to the program content ;
A calculation means for performing a calculation process for deriving a calculation result (C ″) based on a calculation formula specific to the program content using (A ″);
By matching the "the operation result (C read the in the program contents) stored the key information (Ci)", to determine the correctness of the key information (Ci '), the only case where the judgment result is correct A conditional access system for a television, comprising: release means for canceling restrictions on viewing of program content.

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