JPH0946631A - System and method for transmitting and receiving pay broadcast and pay broadcast transmitter-receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To record only a desired sub program onto a VTR by receiving program division information including a sub program number from a transmitter side in advance and selectivley storing the desired sub program number. SOLUTION: This system is composed of a pay broadcast transmitter A and a pay broadcast receiver B. The pay broadcast receiver B receives program division information representing the content of divisions of a pay broadcast program to be broadcast into plural sub programs and sub program identification information to identify the sub program from the pay broadcast transmitter A and the received program division information is displayed on a TV 32 via a display circuit 30 and a desired sub program is selected by using a selection button 33 among displayed program division information and stores the selected sub program into a selection information memory 34, and a comparator circuit 36 compares and discriminates the received sub program identification information with the stored sub program information and allows a VTR 39 to execute the selected sub program only when they are coincident.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pay broadcast transmission / reception system capable of recording only specific contents selected from pay broadcast programs.

[0002]

2. Description of the Related Art As a pay broadcast transmitting / receiving system composed of a conventional pay broadcast transmitting device and a pay broadcast receiving device,
There is a pay broadcasting transmission / reception system described in "Technical Conditions for Pay in Television Broadcasting by Broadcasting Satellite" of the 17th Report of the Telecommunications Technology Council. The pay broadcast transmission / reception system shown in the 17th report of the Telecommunications Technology Council will be described below.

As an example of the above-mentioned conventional pay broadcast transmitting / receiving system, there are those shown in FIGS. 5 and 6. 5 and 6 are configuration diagrams showing configurations of a pay broadcast transmitting apparatus and a pay broadcast receiving apparatus, respectively, which constitute such a conventional pay broadcast transmitting / receiving system. First, in the pay broadcasting transmitter C shown in FIG. 5, 1 is a video signal input terminal for inputting a video signal, 2 is an audio signal input terminal for inputting an audio signal, 3
Is a program information input terminal for inputting program information, 4 is an individual information input terminal for inputting individual information, and 5 is a decoder ID number which differs for each subscriber and a master key (hereinafter referred to as "Kmi") based on the decoder ID number. (Note) is a master key memory in which is stored.

Further, 6 is an encryption circuit for encrypting program information, 7 is an encryption circuit for encrypting individual information, 8 is a scramble key (hereinafter, referred to as "Ks" in program information input from the program information input terminal 3 ) Is used as an initial value to generate a random number, 9 is a video scrambler that scrambles a video signal, 10 is an audio scrambler that scrambles an audio signal, and 11 is encrypted program information and individual information. It is a voice multiplexing circuit that multiplexes the related information and the voice scramble signal composed of.

Further, 12 is a video multiplexing circuit for multiplexing the video scramble signal and the multiplexed audio scramble signal from the audio multiplexing circuit 11, 40 is a video multiplexing signal from the video multiplexing circuit 12 (hereinafter, referred to as A transmitting antenna for transmitting a pay broadcasting signal), 42 is a transmitting antenna 40
It is an artificial satellite that relays the pay broadcast signal from the and transmits it to the receiving antenna 41 of the pay broadcast receiving device D.

Next, in the pay broadcast receiving device D,
Is a receiving antenna for receiving a pay broadcasting signal from the artificial satellite 42, 13 is a video separation circuit for separating the pay broadcasting signal from the receiving antenna 41 into a video scramble signal and an audio scramble signal in which related information is multiplexed, 14 Is an audio separation circuit for separating related information from an audio scramble signal in which related information from the video separation circuit 13 is multiplexed, 15 is a video descrambler for descrambling the video scramble signal, and 16 is descrambled for the audio scramble signal. An audio descrambler, 17 is a decoding circuit for decoding program information, and 18 is a decoding circuit for decoding individual information.

Further, 19 is a master key memory in which Kmi is stored based on a decoder ID number which is different for each subscriber and the decoder ID number, and 20 is a decoding circuit 1
An individual information memory for storing the individual information decrypted in 8; a reference numeral 21 compares the program information decrypted by the decryption circuit 17 with the contract content of the individual information stored in the individual information memory 20; A contract condition comparison circuit that determines a contract number; 22 is a PN generator that generates a random number with Ks in the program information decoded by the decoding circuit 17 as an initial value;
Reference numeral 3 is a video signal output terminal for outputting a descrambled video signal, and 24 is an audio signal output terminal for outputting a descrambled audio signal.

Next, referring again to FIGS. 5 and 6, the operation of the conventional pay broadcast transmitting / receiving system configured as described above will be described. First, in the pay broadcast transmitter C, the individual information input from the individual information input terminal 4 is encrypted by the encryption circuit 7 using Kmi stored in the master key memory 5, and is input from the program information input terminal 3. The program information is encrypted by the encryption circuit 6 using the work key (hereinafter referred to as “Kw”) in the individual information from the individual information input terminal 4.

Further, in order to encrypt the video signal and the audio signal, Ks in the program information input from the program information input terminal 3 is given to the PN generator 8, and the PN generator 8 generates a random number with Ks as an initial value. Is generated, the video signal input from the video signal input terminal 1 is encrypted by the video scrambler 9 using this random number, and the audio input from the audio signal input terminal 2 is also input by the audio scrambler 10 using the random number. Signal encryption.

Then, in the audio multiplexing circuit 11, the related information composed of the encrypted program information and individual information and the audio scramble signal are multiplexed to generate a multiplexed audio scramble signal, and further, The video multiplexing circuit 12 multiplexes the video scramble signal from the video scrambler 9 and the audio scramble signal from the audio multiplexing circuit 11 to generate a pay broadcast signal, and the transmitting antenna 4
The pay broadcast signal is transmitted from 0 to the artificial satellite 42.

Next, in the pay broadcast receiving device D, the pay broadcast signal from the pay broadcasting transmitting device C received via the receiving antenna 41 is mixed in the video separating circuit 13 with the video scramble signal and the related information. The video scramble signal is separated into the scramble signal, the video scramble signal is sent to the video descrambler 15, and the audio scramble signal is sent to the audio separating circuit 1.
Input in 4 respectively. The audio separation circuit 14 separates the audio scramble signal and related information, and further separates the related information into program information and individual information.

The separated audio scramble signal is sent to the audio descrambler 16, and the program information is sent to the decoding circuit 17.
Then, the individual information is input to the decoding circuit 18, respectively. In the decryption circuit 18, only when the input individual information is the individual information addressed to the subscriber, that is, when the decoder ID number in the individual information matches the decoder ID program stored in the master key memory 19, the master key The master key Kmi stored in the memory 19 is used for decryption, and the decrypted individual information is stored in the individual information memory 20.
In this way, the individual information is transmitted in advance prior to the broadcast of the program and stored in the individual information memory 20, and the stored content is compared with the content of the program information sent accompanying the program when the program is broadcast. Whether or not viewing is possible is determined by the comparison result.

In the decryption circuit 17, when the individual information such as the broadcast station code in the program information and the work key identification obtained by encrypting the program information coincide with each other in the individual information memory 20, the work key is stored. The program information is decrypted by the work key Kw designated by the identification, and the contract condition of the program information decrypted by the contract condition comparison circuit 21 and the program information stored in the individual information memory 20 are decrypted. For viewing only when the contents in the individual information including the work key Kw for the program match, that is, when the program number in the program information and the broadcast date of the program match the contracted program number and the expiration date in the individual information. Yes, and in that case, a viewing control flag indicating which of video and audio channels 1 to 4 (1, 2 is TV audio, 3 and 4 independent audio) in the program information is to be decoded. And it outputs the scramble key Ks to decrypt the video and audio signals to the PN generator 22.

Then, the PN generator 22 generates a random number with the scramble key Ks as an initial value and sends it to the video descrambler 15 and the audio descrambler 16, where the video and audio descrambles indicated by the viewing control flag are executed. . The descrambled video signal is output to the video signal output terminal 23, and the audio signal is output from the audio signal output terminal 24.

[0015]

However, by using the conventional pay broadcast transmitting / receiving system configured as described above, a pay tape program (hereinafter, referred to as a pay tape broadcast program) is used.
In the case of recording with "VTR"), the reserved recording function of the VTR is used to refer to the program program previously described in newspapers etc. by the receiving contractor, and the broadcast channel of the program to be recorded or the start of broadcasting , The end time, etc. was set and recorded, but in a promotional video in which multiple artists appear in a music program or in an omnibus movie that is composed of multiple movie programs, only the favorite artist that the subscriber wants to record For example, if you want to record only one structure of a movie in omnibus format, etc., there is no program program display that shows the contents of the program in a finely detailed time. After recording all, you have to perform complicated operations such as editing work to create your favorite recording tape. There was a problem.

The present invention has been made in view of the above problems, and is composed of program information and individual information necessary for viewing a pay broadcast program before the pay broadcast program contracted by the receiving subscriber starts. With respect to the related information, the pay broadcast program desired to be viewed is divided into a plurality of sub-programs, and the program division information indicating the contents is multiplexed and transmitted from the transmitting side. Pay program that can record only a specific sub-program in the program by a simple operation of inputting the sub-program number to be recorded in the VTR from the program division information indicating the content divided into the sub-programs. The purpose is to provide a transmission / reception system.

[0017]

The pay broadcast transmitting / receiving system according to the first invention is a pay broadcast transmitting / receiving system comprising a pay broadcast transmitting device and a pay broadcast receiving device, in order to achieve the above object. In the pay-broadcast transmission device, a program-split information input means (terminal) for inputting program-split information indicating the content obtained by dividing one pay-broadcast program to be broadcast into a plurality of sub-programs, and sub-program identification information for identifying the sub-programs are input. Sub program identification information input means (terminal), video signal and audio signal, the program division information and sub program identification information, and a video sub program / audio / program multiplexing means (sub) The pay broadcasting receiving device includes a program multiplexing circuit, a video multiplexing circuit, an audio / program multiplexing circuit), and separates one pay broadcasting program from the received pay broadcasting signal. Display means (display circuit) for displaying program division information indicating the content divided into a number of sub-programs, and sub-program selection information (sub-program number etc. sub-program number) indicating a desired sub-program selected from the displayed program division information. A selection information memory that stores a code indicating a program, etc., and sub-program identification information separated from the received pay broadcast signal and sub-program selection information from the selection information memory are compared and determined, and a selection recording control signal is output. It is characterized in that the recording of the selected subprogram to the recording device is controlled by the selection recording control signal from the comparison means.

In order to achieve the above-mentioned object, the pay-broadcast transmission device according to the second invention divides one pay-broadcast program to be broadcast into a plurality of sub-programs in the pay-broadcast transmission device which sends a pay-broadcast signal. From the program division information input means (terminal) for inputting the program division information indicating the contents, the sub program identification information input means (terminal) for inputting the sub program identification information for identifying the sub program, and the sub program identification information input means. Subprogram multiplexing means (subprogram multiplexing circuit) for multiplexing the input subprogram identification information for identifying the subprogram within the vertical blanking period of the video signal and outputting the multiplexed video signal, and the subprogram identification A function for receiving a video scramble signal and an audio scramble signal obtained by respectively encrypting a video signal and an audio signal in which information is multiplexed, program division information, and a pay broadcast program. It is composed of video / audio / program multiplexing means (video multiplexing circuit, audio / program multiplexing circuit) that multiplexes information and sends out a pay broadcast signal, and program division information and sub-program identification for video and audio signals. It is characterized in that a pay broadcasting signal in which information is multiplexed is transmitted.

Further, in order to achieve the above object, the pay broadcast receiving apparatus according to the third invention divides one received pay broadcast program into a plurality of subprograms in the pay broadcast receiving apparatus for receiving the pay broadcast signal. The display means (display circuit) for displaying the program division information indicating the contents, the selection means (selection button, etc.) for selecting a desired sub-program from the program division information displayed on the display means, and the selection means A selection information memory that stores in advance sub program selection information indicating a sub program, a detection unit (a signal detection counter, etc.) that detects sub program identification information that identifies a sub program included in a received pay broadcast signal, and a selection And a comparison circuit for outputting a selection recording control signal by comparing and judging the sub program selection information indicating from the information memory with the sub program identification signal detected by the detection means. A control circuit for controlling recording of a selected sub-program to be recorded in the recording device by a control signal, pre-selecting and storing sub-program selection information indicating a sub-program of a pay broadcast program desired to be recorded, When the selected sub program is received, it is detected and recorded in the recording device.

In order to achieve the above-mentioned object, the pay broadcasting transmitting / receiving method according to the fourth invention is a pay broadcasting program transmitting / receiving method for transmitting / receiving a pay broadcasting program, wherein one pay broadcasting program to be broadcast is A pay broadcast signal including program division information indicating the content divided into a plurality of sub programs and sub program identification information for identifying the sub program is transmitted from the pay broadcast transmitting apparatus, and the pay broadcast receiving apparatus preliminarily outputs from the pay broadcast transmitting apparatus. Based on the display content of the program division information included in the received pay broadcast signal, the receiving contractor selects a sub program of the pay broadcast program, and the sub program selection information including the sub program of the selected pay broadcast program is previously set. Stored in the selection information memory,
Whether or not the selected subprogram can be recorded in the recording device by comparing and judging the subprogram identification information included in the received pay broadcast signal with the subprogram selection information stored in advance in the selection information memory. It is characterized by comprising each step for determining.

Further, the pay broadcast transmitting / receiving system according to the first aspect of the present invention is configured as described above, that is, the pay broadcast transmitting apparatus shows program division information indicating the contents of one pay broadcast program divided into a plurality of sub programs. , Program division information input means for inputting sub program identification information, sub program identification information input means for inputting sub program identification information for identifying a sub program, video and audio signals, program division information and sub program identification information Display means for displaying a program division information indicating a sub program of a pay broadcast program separated from the received pay broadcast signal in the pay broadcast receiving device, and a video sub program / audio / program multiplexing means for transmitting a signal; A selection information memory that stores sub program selection information that indicates the desired sub program selected from the program division information, and a sub number that is separated from the received pay broadcast signal. And a comparison determining comparing means and a sub program selection information from the selection information memory and the identification information,
It is possible to provide a pay-broadcast transmission / reception system capable of recording only specific contents such as a sub-program selected from pay-broadcast programs in the recording device only when they match as a result of the comparison determination.

The pay broadcast transmitting apparatus according to the second aspect of the invention is configured as described above, that is, program division information input means for inputting program division information indicating a pay broadcast program divided into sub programs, and sub programs. Sub-program identification information input means for inputting sub-program identification information, sub-program multiplexing means for multiplexing the sub-program identification information within the vertical blanking period of the video signal, and multiplexed video signal and audio. A video / audio / program multiplexing means for multiplexing a signal, program division information, and related information for receiving a pay broadcast program and sending the pay broadcast signal, and sending the pay broadcast signal configured in this way Accordingly, the sub-program selected from the pay broadcast programs, etc. can be constructed with a small configuration in which only the program division information input means, the sub-program identification information input means, and the sub-program multiplexing means are added. It is possible to provide a pay broadcast transmitting apparatus for transmitting and generates information to record only the contents of the constant.

The pay-broadcast receiving device according to the third aspect of the invention is configured as described above, that is, the pay-broadcast program transmitted in advance prior to the broadcast of the pay-broadcast program for which viewing is permitted is made into a plurality of sub-programs. The program division information indicating the contents divided into is displayed on the display means, the desired subprogram is selected by the selection means from the program division information displayed on the display means, and the subprogram selection information selected by the selection means is selected in advance. The sub-program identification information stored in the information memory and for identifying the sub-program included in the received pay broadcast signal is detected by the detection means, and the sub-program selection information from the selection information memory and the sub-program detected by the detection means are detected. The comparison circuit compares the identification signal with the identification signal to output the selected recording control signal, and the selected recording program is recorded to the recording device by the selected recording control program. By providing such control, a pay broadcast receiving device is provided in which the recording operation is controlled only during the period when the judgment result in the comparison circuit is coincident, and only the preselected sub program is recorded by the recording device. can do.

The pay-broadcast transmitting / receiving method according to the fourth aspect of the present invention is configured as described above, that is, one pay-broadcast program to be broadcast is divided into a plurality of sub-programs, and program division information and sub-programs. The pay-broadcast signal including the sub-program identification information for identifying the Based on the result, the receiving subscriber selects a sub program of the pay broadcast program based on the comparison result of the sub program identification information included in the received pay broadcast signal and the preselected sub program, and records only when they match. It is possible to provide a pay broadcast transmission / reception method capable of recording only specific contents such as a sub program selected from pay broadcast programs by the device.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, one embodiment of each of the first to fourth inventions (hereinafter, the inventions will be collectively referred to as the invention) based on the accompanying drawings and FIGS. 1 to 4 in detail. Explained. FIG. 1 shows the configuration of a pay broadcast transmitting apparatus that constitutes the pay broadcast transmitting / receiving system and method in one embodiment of the first and fourth inventions, or the configuration of the pay broadcast transmitting apparatus in one embodiment of the second invention. FIG. 2 is a block diagram showing the configuration of a pay broadcast receiving apparatus which constitutes the pay broadcast transmitting / receiving system and method in one embodiment of the first and fourth inventions, or the pay broadcast receiving in one embodiment of the third invention. FIG. 3 is a block diagram showing the configuration of the device, FIG. 3 is a diagram showing program division information displayed on a television (hereinafter referred to as “TV”) connected to the pay broadcast receiving device of FIG. 2, and FIG. FIG. 3 is a diagram showing a sub-program identification signal multiplexed with a video signal of a pay broadcast signal transmitted / received by the pay broadcast transmitting / receiving system of FIGS. 1 and 2.

In the pay broadcast transmission / reception system shown in FIGS. 1 and 2, the same reference numerals as those given to the components forming the conventional pay broadcast transmission / reception system shown in FIGS. 5 and 6 are the same. The symbol is attached.

First, with reference to FIG. 1, the structure of a pay-broadcast transmitter A constituting the pay-broadcast transmission / reception system in one embodiment of the first to fourth inventions will be described. Here, the duplicated description will not be given for the components having the same reference numerals as those of the above-mentioned conventional one. In FIG. 1, 25 is a program division information input terminal for inputting program division information for dividing one pay broadcast program to be broadcast into a plurality of sub programs and displaying the contents so that the sub programs can be selected in advance. A sub-program identification signal (composed of a start signal and a sub-program signal, which is transmitted after being multiplexed with a video signal of a pay broadcast signal and which is divided into a plurality of sub-programs, that is, a period of program division information (see FIG. 4)) is an input terminal for the sub program identification signal.

Further, 27 is a sub-program multiplexing circuit for multiplexing the sub-program identification signal as digital data within the vertical blanking interval of the video signal, and 28 is a data area of the audio scramble signal from the audio scrambler 10. For the channel, the related information composed of the encrypted program information from the encryption circuit 6 and the encrypted individual information from the encryption circuit 7 is multiplexed as a packet and multiplexed to the video multiplexing circuit 12. Voice that outputs a converted voice signal /
It is a program multiplexing circuit.

On the other hand, in the pay-broadcast receiving apparatus B shown in FIG. 2, reference numeral 29 denotes a sound from a sound scramble signal in which related information separated from the pay-broadcast signal received through the receiving antenna 41 by the video separation circuit 13 is multiplexed. An audio / program separation circuit for separating a scramble signal, related information, and program division information from each other.
A display circuit for generating a display signal for display at 32, 3
Reference numeral 1 is a display signal output terminal for outputting a display signal, 32 is a TV for displaying program division information and the like, 33 is a selection button for inputting a program number and a sub program number in the program division information displayed on the TV 32, and 34 is a selection It is a selection information memory for storing the program number and the sub program number (sub program selection information) input from the button 33.

Reference numeral 35 detects a sub-program identification signal indicating the period of program division information multiplexed as digital data within the vertical blanking period of the video signal descrambled by the video descrambler 15, and detects the sub-program identification signal. A signal detection counter for counting the sub-program number from the start of the program, 36 is the program number in the program information decoded by the decoding circuit 17, and the program number in the sub-program selection information stored in the selection information memory 34. The sub program number and the counter value from the signal detection counter 35 are input, respectively, the program number in the program information matches the program number in the sub program selection information, and the counter value and the sub program in the sub program selection information It is a comparison circuit that makes a comparison / judgment as to whether the program numbers match and outputs a selective recording control signal representing the judgment result.

Reference numeral 37 is a control circuit for outputting a control signal for controlling recording of the sub-program in the VTR 39 according to the selection recording control signal from the comparison circuit 36 when the counter value and the sub-program number match, and 38 is A control signal output terminal for outputting a control signal from the control circuit 37, 39 records the video signal from the video signal output terminal 23 and the audio signal from the audio signal output terminal 24 by the control signal from the control signal output terminal 38, respectively. VTR.

Next, the operation of the pay broadcast transmitting / receiving system configured as described above will be described with reference to FIGS. 1 and 2. On the pay-broadcasting transmitter A side shown in FIG. 1, the individual information indicating the contract contents of the decoder such as the decoder ID number of each receiving subscriber input from the individual information input terminal 4 in the encryption circuit 7 is stored in the master key memory 5. Encryption is performed using Kmi, and the program information input terminal 3 is used in the encryption circuit 6.
The program information indicating the content of the program required to view the pay broadcast input from is encrypted using the work key Kw in the individual information input from the individual information input terminal 4.

The PN generator 8 generates and outputs a random number with Ks in the program information input from the program information input terminal 3 as an initial value, and uses the random number to input the voice scrambler 10 from the audio signal input terminal 2. The scrambled audio signal is scrambled and the audio scrambled signal is output. In the video scrambler 9, the sub program identification signal input terminal 26
The vertical retrace of the video signal input from the video signal input terminal 1 using the sub program identification information indicating the content divided into a plurality of sub programs input from the sub program identification signal as digital data through the sub program multiplexing circuit 27. After multiplexing in the period, scrambling is performed and the video scramble signal
It is output to the program multiplexing circuit 28.

In the audio / program multiplexing circuit 28, the program division information from the program division information input terminal 25 and the encryption circuit 6 from the encryption circuit 6 for the data channel which is the data area of the audio scramble signal from the audio scrambler 10. The encrypted program information and the related information composed of the encrypted individual information from the encryption circuit 7 are multiplexed as a packet and output as an audio scramble signal, and this multiplexed audio scramble signal is video-multiplexed. The video broadcasting circuit 12 generates a pay broadcast signal composed of the video scramble signal from the video scrambler 9 and the multiplexed audio scramble signal from the audio / program multiplexing circuit 28. Then, the signal is transmitted from the transmitting antenna 40 to the pay broadcast receiving apparatus B via the artificial satellite 42.

On the pay-broadcast receiver B side shown in FIG. 2, the pay-broadcast signal sent from the pay-broadcast transmitter A is received via the receiving antenna 41, and is multiplexed with the video scramble signal by the video separation circuit 13. The video scramble signal is separated into the audio scramble signal, the video scramble signal is input to the video descrambler 15, and the multiplexed audio scramble signal is input to the audio / program separation circuit 29. The audio / program separation circuit 29 separates the multiplexed audio scramble signal into an audio scramble signal, related information, and program division information, and further separates related information into program information and individual information.

The audio scramble signal is sent to the audio descrambler 16, the program division information is sent to the display circuit 30, the program information is sent to the decoding circuit 17, and the individual information is sent to the decoding circuit 18.
Respectively. In the decryption circuit 18, the decoder ID number in the input individual information and the master key memory 19
Only when the decoder ID number stored in is coincident with the decoder ID number, the individual information stored in the master key memory 19 is decrypted with the encrypted Kmi, and the decrypted individual information is converted into the individual information. It is stored in the memory 20. In this way, the individual information is sent in advance prior to the broadcast of the program and stored in the individual information memory 20, and this content is compared with the content of the program information transmitted accompanying the program when the program is broadcast. Whether to view or not is determined. The decryption circuit 17 decrypts the program information with the broadcast station code in the program information and the Kw that is the encrypted program information, and inputs the result to the contract condition comparison circuit 21.

In the contract condition comparison circuit 21, the decryption circuit 17
The contract condition of the program information decrypted by the item and the contract content of the individual information stored in the individual information memory 20 match (for example, the program number in the program information or the broadcast date of the program,
Only when the contracted program number in the individual information and the expiration date of the contracted program match), viewing is possible, and in that case, video and audio channels 1 to 4 (1 and 2 are TV audio, 3, A viewing control flag indicating which of the independent voices (4) is descrambled, and Ks obtained by encrypting the video signal and the voice signal are given to the PN generator 22.

The PN generator 22 is a video descrambler 15.
Also, a viewing control flag is issued to the audio descrambler 16 to descramble the video and audio signals indicated by the viewing control flag. Display circuit 30
Receives the program division information from the audio / program separation circuit 29, converts it into a display signal for display on the TV 32, outputs it to the TV 32 via the display signal output terminal 31, and displays it there. The program division information displayed on the TV 32 is shown in FIG. It should be noted that this program division information, regardless of whether or not a pay broadcast program is being received, is transmitted and received independently or together with video and audio signals before the reception of the desired program and the desired program and sub program number. Can be set.

As shown in FIG. 3, the program division information includes a broadcasting station, a channel, a date and time, a program name, and a program number to be broadcast.
It is composed of sub program numbers 1 to 5 which indicate which sub program in the program. Subscriber is VTR3
The program number and the sub program number of the program to be recorded in 9 are input from the selection button 33. In the embodiment of the present invention, it is assumed that the subscriber has stored the selection information memory 34 as having selected the program number 1111 and the sub program numbers 2 and 4. Of course, other program numbers and sub program numbers may be used.

On the other hand, in the video signal descrambled by the video descrambler 15, as shown in FIG.
A sub-program identification signal composed of a start signal and a sub-program signal is multiplexed as digital data at 15H within the vertical blanking period of the video signal, for example. Then, the signal detection counter 35 detects the sub-program identification signal, sets the internal counter value to 1 by detecting the start signal indicating the beginning of the program, and thereafter increments by +1 each time the sub-program signal indicating the switching of the sub-program is detected. Count one by one.

In the comparison circuit 36, the program number in the program information decoded in the decoding circuit 17, the sub program number in the sub program selection information from the selection information memory 34, and the counter value of the signal detection counter 35 are matched. To detect. Here, since the sub-program numbers stored in the selection information memory 34 are 2 and 4, when the counter values of the signal detection counter 35 are 1, 3, and 5, they do not match, and when they are 2 and 4, they match. The selective recording control signal indicating the determination result is sequentially output to the control circuit 37. Then, the control circuit 37
The control signal is output so that the VTR 39 performs the recording operation only during the period when the determination result from the selective recording control signal sequentially sent in step 1 is coincident.

As described above, according to the embodiment of the present invention, in the pay broadcast transmitting apparatus A, the program is divided into a plurality of sub-programs prior to the broadcast of the pay program that can be viewed by the subscriber. Program division information indicating the contents is input from the program division information input terminal 25, and the sub program multiplexing circuit 27
Then, the sub-program identification information for identifying the sub-program input from the sub-program identification information input terminal 26 is multiplexed within the vertical blanking period of the video signal, and the program division information and related information for receiving pay broadcasting are provided. By transmitting a pay broadcast signal composed of a video scramble signal and an audio scramble signal, which are respectively encrypted video signals and audio signals, program division information input means, sub program identification signal input means, and sub program multiplexing means By using only a small number of addition means, it is possible to generate and send information for recording only the specific contents of the pay broadcast program.

Further, in the pay broadcast receiving apparatus B, the program division information indicating the contents of the program divided into a plurality of sub-programs is displayed on the TV 32 before the viewing-permitted program starts, and from the displayed program division information, The number of the sub program to be recorded in the VTR 39 is inputted and stored by the selection button 33, and when the sub program is received, the selection recording control signal for controlling the sub circuit to record the sub program is output, By using this selective recording control information, the VTR 39
By outputting the control signal for controlling the recording operation from the control circuit 37, it is possible to record only the sub-program required by the subscriber by a simple operation without any trouble.

Although the VTR 39 is used as the device for recording the video signal and the audio signal in the pay broadcast receiving device B, any other recording device that can be controlled from the outside such as a CD recording device may be used. Further, in the present embodiment, the receiving contractor manually operates the selection button 33 to select a sub-program, but by mounting the selection button on the remote controller, input selection can be easily performed even from a long distance. You may do it.

Further, in the pay broadcast transmitter A, the sub-program identification signal for identifying the sub-program is multiplexed and sent as digital data within the vertical blanking period of the video signal. By multiplexing the program identification information, in the pay broadcast receiving apparatus B,
A circuit configuration that does not require the signal detection counter 35 may be provided by providing means for decoding the sub program identification information and outputting the output signal to the comparison circuit 36. Further, in the embodiment of the present invention described above, the transmitting, receiving antenna and the artificial satellite are used as the signal transmitting means between the pay broadcasting transmitting / receiving devices.
Alternatively, any other signal transmission means such as direct transmission / reception between antennas may be used.

[0046]

The pay broadcast transmitting / receiving system according to the first aspect of the invention is configured as described above, and in the pay broadcast transmitting apparatus, the program having the sub program identification information in the pay broadcast signal and the sub program information that can be selected. The division information is transmitted to the pay-broadcast receiving device, and the pay-broadcast receiving device shows the sub-program selection information and sub-program identification indicating the sub-program set according to the display content of the program division information sent from the sender by the receiving contractor. The VTR records only the selected specific broadcast content such as the set subprogram when the information is compared and judged, and the specified content is divided into a plurality of subprograms on the transmitting side. It is possible to provide pay broadcast programs that can record only those programs, and the receiving side can record only the specific contents of the programs that match the individual preferences of the receiving subscribers. There.

The pay-broadcast transmitting apparatus according to the second aspect of the present invention sends a pay-broadcast signal containing program division information and sub-program identification information capable of recording only specific contents of the program on the VTR, thereby providing a program division information input terminal, Generates and transmits a pay broadcast signal that allows selection of specific contents by dividing a program to be broadcast into a plurality of sub programs with a configuration that only requires a sub program identification information input terminal and a sub program multiplexing circuit. Can be done, and its practical effect is great.

The pay broadcast receiving apparatus according to the third aspect of the present invention displays the program division information indicating the content of the received program before the start of the program permitted to be viewed on the TV, and the receiving contractor is V
With the simple operation of inputting the program number and sub program number of the program division information to be recorded in TR with the select button, only the specific contents of the program required by the subscriber can be automatically recorded, Its practical effect is great.

The pay broadcast transmitting / receiving method according to the fourth invention is
Sub-program identification information in the pay-broadcast signal and program division information having selectable sub-program information are transmitted to the pay-broadcast receiving device, and the pay-broadcast receiving device divides the program sent from the sender by the receiving contractor. The subprogram selection information indicating the subprogram set according to the display content of the information is compared and judged with the subprogram identification information, and only the selected specific content such as the set subprogram is recorded in the recording device only when they match. By doing so, the sending side can provide a pay broadcast program in which the program to be broadcast is divided into a plurality of sub-programs and only specific contents can be recorded, and the receiving side can provide the receiving subscriber with individual preferences. Only specific contents of existing programs can be recorded, and its practical effect is great.

[Brief description of drawings]

FIG. 1 is a configuration of a pay broadcast transmitting apparatus that constitutes a pay broadcast transmitting / receiving system and method according to an embodiment of the first and fourth inventions, or a configuration of a pay broadcast transmitting apparatus according to an embodiment of the second invention. Block diagram showing

FIG. 2 is a configuration of a pay broadcast receiving apparatus that constitutes a pay broadcast transmitting / receiving system and method in one embodiment of the first and fourth inventions, or a configuration of a pay broadcast receiving apparatus in one embodiment of the third invention. Block diagram showing

FIG. 3 is a diagram showing program division information displayed on a television connected to the pay broadcast receiving apparatus of FIG.

FIG. 4 is a diagram showing a subprogram identification signal multiplexed with a video signal of a pay broadcast signal transmitted / received by the pay broadcast transmitting / receiving system of FIGS. 1 and 2.

FIG. 5 is a configuration diagram showing a configuration of a pay-broadcast transmitting device that constitutes a conventional pay-broadcast transmitting / receiving system.

FIG. 6 is a configuration diagram showing a configuration of a pay-broadcast receiving device that constitutes a conventional pay-broadcast transmitting / receiving system.

[Explanation of symbols]

 1 Video signal input terminal 2 Audio signal input terminal 3 Program information input terminal 4 Individual information input terminal 5 Master key memory 6, 7 Encryption circuit 8 PN generator 9 Video scrambler 10 Audio scrambler 11 Audio multiplexing circuit 12 Video multiplex Circuit 13 video separation circuit 14 audio separation circuit 15 video descrambler 16 audio descrambler 17, 18 decryption circuit 19 master key memory 20 individual information memory 21 contract condition comparison circuit 22 PN generator 23 video signal output terminal 24 audio signal output Terminal 25 Program division information input terminal 26 Sub program identification signal input terminal 27 Sub program multiplexing circuit 28 Audio / program multiplexing circuit 29 Audio / program separation circuit 30 Display circuit 31 Display signal output terminal 32 TV 33 Selection button 34 Selection information memory 35 signal detection counter 36 ratio Comparison circuit 37 Control circuit 38 Control signal output terminal 39 VTR 40 Transmission antenna 41 Reception antenna 42 Satellite

Continuation of front page (51) Int.Cl. ⁶ Identification code Office reference number FI Technical display location H04N 7/167 H04N 7/167

Claims (4)

[Claims] 1. A pay broadcast transmission / reception system comprising a pay broadcast transmitter and a pay broadcast receiver, wherein the pay broadcast transmitter divides one pay broadcast program to be broadcast into a plurality of subprograms. Program division information input means for inputting the program division information shown, sub program identification information input means for inputting sub program identification information for identifying the sub program, video signal and audio signal, the program division information and sub program identification information And a video / subprogram / sound / program multiplexing means for multiplexing and transmitting a pay broadcast signal, wherein the pay broadcast receiving device separates one pay broadcast program separated from the received pay broadcast signal into a plurality of sub programs. Display means for displaying program division information indicating the contents divided into, and sub-program selection information indicating a desired sub-program selected from the displayed program division information. A selection information memory for storing, a sub-program identification information separated from the received pay broadcast signal and a comparison means for comparing and determining sub-program selection information from the selection information memory and outputting a selection recording control signal, A pay broadcast transmitting / receiving system characterized in that the recording of the selected sub-program in the recording device is controlled by a selection recording control signal from the comparing means. 2. A pay-broadcast transmitting apparatus for sending a pay-broadcast signal, and program division information input means for inputting program division information indicating the content of one pay-broadcast program to be broadcast divided into a plurality of sub-programs, and the sub. Sub program identification information input means for inputting sub program identification information for identifying a program, and sub program identification information for identifying a sub program input from the sub program identification information input means are multiplexed within a vertical blanking period of a video signal. Sub-program multiplexing means for outputting a multiplexed video signal, a video scramble signal and an audio scramble signal obtained by respectively encrypting a video signal and an audio signal in which the sub program identification information is multiplexed, and the program division information. It comprises video / audio / program multiplexing means that multiplexes related information for receiving a pay broadcast program and sends out a pay broadcast signal. Pay broadcast transmitting apparatus characterized by sending a pay broadcast signal obtained by multiplexing the program division information and sub program identification information to the signal. 3. A pay-broadcast receiving device for receiving a pay-broadcast signal, displaying means for displaying program division information indicating the content of one received pay-broadcast program divided into a plurality of sub-programs, and said display means. Selection means for selecting a desired sub-program from the selected program division information, selection information memory for pre-storing sub-program selection information indicating the sub-program selected by the selection means, and included in the received pay broadcast signal. Detecting means for detecting sub-program identification information for identifying a sub-program, and sub-program selection information from the selection information memory and the sub-program identification signal detected by the detecting means are compared and determined to obtain a selection recording control signal. A comparison circuit for outputting and a control circuit for controlling the recording of the selected sub-program to be recorded in the recording device by the selection recording control signal, Subprogram selection information indicating a subprogram of a desired pay program is selected and stored in advance, and when the selected sub program is received, it is detected and recorded in a recording device. apparatus. 4. A method for transmitting and receiving a pay broadcast program for transmitting and receiving a pay broadcast program, comprising: program division information indicating the content of one pay broadcast program to be broadcast divided into a plurality of sub programs; and the sub program. A pay broadcast signal including sub program identification information for identification is sent from the pay broadcast transmitting device, and in the display content of the program division information included in the pay broadcast signal received from the pay broadcast transmitting device in the pay broadcast receiving device. The subscribing person selects a sub program of the pay broadcasting program based on the sub program, and sub program selection information indicating the sub program of the selected pay broadcasting program is stored in the selection information memory in advance and included in the received pay broadcasting signal. The sub program identification information stored in the selection information memory is compared with the sub program selection information stored in advance in the selection information memory. Pay broadcast reception method characterized by comprising the steps of determining whether the set of records.