JP2001078154A - Broadcast signal transmission method and receiving device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To multiplex and transmit copyright protection method selection information required for a designated video or audio to select and process a copyright protection method in a reception device, thereby enabling the reception device A broadcast signal transmission method capable of selecting one of a plurality of copyright protection schemes or simultaneously processing a plurality of copyright protection schemes, and a receiving apparatus for receiving a broadcast signal transmitted by the broadcast signal transmission method. I do. SOLUTION: The video, audio, data, program-related information, and the copyright protection method selection information necessary for selecting and processing the copyright protection method in the receiving device for the video or audio included in the program are multiplexed. To transmit. A copyright protection method selection control means for selecting a copyright protection method for the video signal or the audio signal based on the multiplexed and transmitted copyright protection method selection information; Copyright protection means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a broadcast signal transmission method and a receiver for receiving a broadcast signal transmitted by using the broadcast signal transmission method.

[0002]

2. Description of the Related Art FIG. 6 is a diagram showing the configuration of a conventional system for digitizing and transmitting video, audio and data, and displaying what is transmitted through a transmission line from digital to analog. Reference numeral 101 denotes a signal source including a video signal, an audio signal, and data including a still image or a moving image, and 102 denotes a video signal or an audio signal
PEG (Moving Picture Image Coding Experts Grou
Source encoding means 105 for encoding according to the information source encoding method specified in p), for a program to be transmitted, program-related information (for example, a program , A program number, a program number, a start time, etc.), and these information are usually written in the MPEG system standard (GENERIC CODING OF MOVING PICTURES).
AND ASSOCIATED AUDIO: SYSTEM Recommendation H.22
2.0, ISO / IEC 13818-1) and the DVB system standard (Digital Video Broadc
Asting (DVB) systems, ETS 300 468, January 1996). 103 is multiplexing means for multiplexing the coded signal and program-related information, 104 is error correction coding means for processing data for protection against transmission line errors, and digital modulation means for transmitting digital signals. Channel encoding means. A transmission path 107 includes a transmitter, an actual transmission path, and a tuner. Reference numeral 108 denotes a channel decoding unit including a digital demodulation unit for demodulating a digitally modulated signal and an error correction unit for a data error generated in the transmission path 107. Reference numeral 109 denotes a multiplexed signal output from the channel decoding unit 108. Demultiplexing means 110 for demultiplexing the digital signal into an encoded signal and program-related information, for example, by decoding a signal encoded according to an information source encoding method specified by MPEG into a video signal or an audio signal. A source decoding unit 113 for displaying a program selection and program selection presentation process using program-related information necessary for selecting the program, which is input from the demultiplexing unit 109 to the transmitted program A program-related information processing means 111 for performing generation and the like is provided with a video signal and a video signal output from the source decoding means 110. Copyright protection processing means for performing a copyright protection processing in fine audio signal 112 is a signal output device for outputting a video signal and an audio signal copyright protection processing in a copyright protection processing unit 111.

[0003] The multiplexing means 103 may have a scrambling function for scrambling the signal, and the demultiplexing means 109 may have a descrambling function for returning the scrambled signal to the original signal.

Next, the operation of the conventional system shown in FIG. 6 will be described. A video signal, an audio signal, and data comprising a still image or a moving image from the signal source 101 are encoded by a source encoding means 102 according to an information source encoding method defined by MPEG, and the program , For example, the type of information constituting the program, the program number, the start time, etc., and multiplexes the signals output by the source encoding means 102 and the program-related information generating means 105 with the multiplexing means 103. To multiplex. The multiplexing is MPEG
Or the DVB system standard, which is a European digital broadcasting standard. The multiplexed digital signal is processed by channel encoding means 104 using error correction coding means for processing data for protection against transmission line errors and digital modulation means for transmitting a digital signal. Is transmitted on a transmission path 107 including a transmitter, an actual transmission path, and a tuner.

The transmitted result is subjected to digital demodulation and error correction processing by channel decoding means 108. The channel decoding unit 108 outputs the same signal as the signal output from the multiplexing unit 103 by performing a procedure reverse to that of the channel encoding unit 104. The multiplexing / demultiplexing means 109 is opposite to the multiplexing means 103,
Demultiplexing is performed based on the MPEG system standard and the DVB system standard, and the separated signal is sent to a source decoding unit 110 and a program-related information processing unit 113.
Is output to

The information output to the source decoding means 110 is decoded into a video or audio signal in accordance with, for example, the MPEG standard. The program-related information processing means 113
Based on the program-related information separated by the demultiplexing means 109, a display screen for a program selection / presentation process is performed using program-related information necessary for selecting the program. The copyright protection processing means 111 performs copyright protection processing on the video signal or audio signal output from the source decoding means 110, and the video signal is output to, for example, a monitor, the audio signal is output to, for example, a speaker, and the data signal is output from the signal output device 112. Is output to, for example, a computer. Note that the copyright protection processing here refers to, for example, signal processing according to the AGC (automatic gain control) pseudo pulse method as processing that cannot be normally recorded on a VCR having an analog input.

[0007]

As described above, according to the conventional broadcast signal transmission method and the conventional receiver, the broadcast signal transmission,
And broadcast signals can be received, but since information for selectively controlling the copyright protection scheme for video or audio has not been sent, for example, the There has been a problem that one method cannot be selected from the methods or a plurality of copyright protection methods cannot be processed at the same time.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. For example, by transmitting information for selectively controlling a copyright protection method for video or audio, the corresponding video or audio is transmitted. Against
A broadcast signal transmission method in which a receiving apparatus can perform copyright protection for a corresponding video or audio by selecting one of a plurality of copyright protection schemes or simultaneously processing a plurality of copyright protection schemes; It is another object of the present invention to provide a receiver for receiving a broadcast signal transmitted by the broadcast signal transmission method.

[0009]

In order to solve the above-mentioned problems, a broadcast signal transmission method according to the present invention (Claim 1) provides a program including video, audio and data, and a program which is information related to the program. The related information and the video or audio included in the program are transmitted by multiplexing the copyright protection system selection information necessary for selecting and processing the copyright protection system in the receiving device.

[0010] A receiving apparatus according to the present invention (Claim 2)
Is a program including video, audio, and data, program-related information that is information related to the program, and video or audio included in the program necessary for the receiving apparatus to select and process a copyright protection method. A receiving apparatus for receiving a broadcast signal in which copyright protection system selection information is multiplexed and transmitted, wherein the copyright protection system selection information is transmitted to a video signal or an audio signal based on the multiplexed and transmitted copyright protection system selection information. Copyright protection scheme selection control means for selecting a copyright protection scheme;
It is provided with a plurality of copyright protection means for a video signal or an audio signal.

[0011]

(Embodiment) FIG. 1 is a diagram showing a configuration of a broadcast signal transmission method and a receiving apparatus according to an embodiment of the present invention. In the figure, 1 is a signal source, 2 is a source encoding unit, 3 is a multiplexing unit, 4 is a channel encoding unit, and 5 is a program-related information generating unit. 102, multiplexing means 103, channel encoding means 104, and program-related information generation means 105 are the same or equivalent. However, the program-related information generating means 5 is a means having a function of generating program-related information using also copyright protection system selection information described later.

Reference numeral 6 denotes a copyright protection method selection information generating means for generating a copyright protection method selection information necessary for selecting and processing a copyright protection method in a receiving apparatus for a video or audio included in a transmitted program. It is.

7 is a transmission line, 8 is channel decoding means, 9 is demultiplexing means, 10 is source decoding means, 1
1 is an information synthesizing unit, 12 is a signal output device, and 13 is a program-related information processing unit. The transmission line 107, the channel decoding unit 108, the demultiplexing unit 109, the source decoding unit 110, and the information synthesizing unit in the conventional example of FIG. This is the same as or equivalent to the means 111, the signal output device 112, and the program-related information processing means 113. However, the program-related information processing means 13 is a means having a function of also outputting copyright protection system selection information.

Reference numeral 14 denotes a copyright protection system selection control unit, which controls a plurality of copyright protection units described later in accordance with the copyright protection system selection information output from the program-related information processing unit 13.

Reference numeral 15a denotes first copyright protection means, and 15b denotes second copyright protection means, which respectively perform copyright protection processing on an input video signal or audio signal.

FIG. 2 shows the first embodiment in FIG.
FIG. 3 is a diagram showing the configuration of the copyright protection means 15a of FIG. 1, and FIG. 3 shows the second copyright protection means 1 in FIG.
It is a figure which shows the structure of 5b. In FIG. 2, the first copyright protection unit 15a includes a first copyright protection unit 21a and a first selector 22a. The first copyright protection unit 21a performs a copyright protection process on the video signal or the audio signal input from the source decoding unit 10.
The first selector 22a includes a copyright protection system selection control unit 1
4 is output to the first copyright protection unit 15a.
For example, in the case of "0", the video signal or the audio signal inputted from the source decoding means 10 is directly used as the first copyright protection means 15a in accordance with the copyright protection system selection signal of
Is output to the second copyright protection unit 15b. For example, if "1", the copyrighted video signal or audio signal output from the first copyright protection unit 21a is output to the first copyright protection unit 21a.
Is output to the second copyright protection unit 15b as an output of the copyright protection unit 15a. In FIG. 3, the second copyright protection unit 15b includes a second copyright protection unit 21b and a second selector 22b. Second copyright protection means 21
b performs a copyright protection process on the video signal or audio signal input from the first copyright protection unit 15a.
The second selector 22b is a copyright protection system selection control unit 1
4 which is output to the second copyright protection unit 15b.
In accordance with the copyright protection system selection signal, for example, if it is "0", the video signal or the audio signal input from the first copyright protection unit 15a is directly used as the second copyright protection unit 1
5b is output to the signal output device 12, for example, if it is "1", the copyrighted video signal or audio signal output by the second copyright protection unit 21b is output from the second copyright protection unit 15b. The signal is output to the signal output device 12 as an output.

Next, in configuring the present invention, the copyright protection system selection information will be described first, and then the actual operation in this embodiment will be described.

FIG. 4 is a diagram showing an example of a descriptor including the copyright protection system selection information generated by the copyright protection system selection information generating means 6 in FIG. Program arrangement information standard used for broadcasting "
(ARIB STD-B10 Version 1.1, July 1998)
Part: Data structure and definition of program arrangement information ”, the digital copy control descriptor (Digital
FIG. 3 is a diagram illustrating an example of a digital copy control descriptor when copyright protection method selection information is added to a copy control descriptor.

In the digital copy control descriptor shown in FIG. 4, a descriptor tag is a code for identifying the descriptor, and a descriptor length is a descriptor length.
gth) indicates the length of the entire descriptor, digital copy control information (digital recording control data) indicates information for controlling the copy generation, and the maximum transmission rate flag (m
aximum bit rate flag) indicates that the subsequent maximum transmission rate field is valid when the 1-bit flag is "1", and a component control flag.
When the 1-bit flag is “1”, the field after the component control length described later is valid, and digital copy control information and the like described in the field are defined for each component constituting the program. The maximum transmission rate (maximum
bit rate) indicates the transmission rate of the stream packet, component control length
Indicates the length of the following component control loop,
The component tag (component tag) is for identifying a component that constitutes a program, and is referred to as a “program arrangement information standard used for digital broadcasting” ARIB STD-B10
Has the same meaning as Reserved bits (reserved fu
ture use) is a bit reserved for the future.

Copyright protection system selection information 1 (copyright co
Control data 1) indicates copyright protection method selection information in the video or audio of the program specified by the digital copy control descriptor, and copyright protection method selection information 2 (copyright
The control data 2) indicates copyright protection system selection information in video or audio indicated by a component tag which is a tag for identifying a component constituting a program.

FIG. 5 is a diagram showing an example of the selected copyright protection method indicated by the copyright protection method selection information 1 and the copyright protection method selection information 2 in FIG. here,
An example in which two types of copyright protection schemes are selected will be described. As shown in FIG. 5, when the copyright protection method selection information is “000”, no copyright protection is required,
In the case of “001”, the first copyright protection method is selected, in the case of “010”, the second copyright protection method is selected, and in the case of “011”, the first copyright protection method is selected. This indicates that both the system and the second copyright protection system are selected. When the copyright protection method selection information is from “100” to “111”, it indicates that the information is secured for the future.

Hereinafter, a broadcast signal transmission method and an operation of a receiving apparatus according to an embodiment of the present invention will be described with reference to FIGS.
This will be described with reference to FIG.

In FIG. 1, signal sources 1 are video, audio, and data, and these signals are digitally encoded by a source encoding means 2. These configurations are the same as in the conventional example. The copyright protection method selection information generating means 6 is a means for generating copyright protection method selection information necessary for selecting and processing the copyright protection method on the signal source 1 on the receiving device side. For example, in the example shown in FIG. 5, for example, “001” is selected when the first copyright protection method is selected, and “010” is selected when the second copyright protection method is selected. If both the first copyright protection method and the second copyright protection method are selected, “011” is set as the copyright protection method selection information, and the copyright protection method selection information generation means 6 is used as the program-related information generation means 5. Output to The program-related information generating means 5 also generates program-related information for the signal source 1 using the copyright protection method selection information output by the copyright protection method selection information generating means 6. In the case of the example shown in FIG. 4, for example, the selection information is written into the copyright protection method selection information 1 (copyright control data 1) as the copyright protection method selection information for the video or audio of all programs specified by the digital copy control descriptor, The copyright protection system selection information 2 (copyright control data 2) is used as the copyright protection system selection information in the video or audio indicated by the component tag which is a tag for identifying a component constituting the program.
Then, a digital copy control descriptor in which selection information is written is generated, and program-related information for the signal source 1 is generated.
The generated program-related information is multiplexed by the multiplexing means 3 with the output of the source encoding means 2. After the output of the source encoding means 2 and the output of the program-related information generating means 5 are multiplexed by the multiplexing means 3, they are channel-encoded by the channel encoding means 4 and sent to the receiving device via the transmission path 7. The received signal is channel-decoded by the channel decoding means 8, and the output result is sent to the source decoding means 10 for video, audio and data by the demultiplexing means 9, and the program-related information is sent to the program-related information processing means 13. Each is output. The video signal and the audio signal decoded by the source decoding means 10 are output together with the data to the signal output device 12 via a first copyright protection means 15a and a second copyright protection means 15b described later. The program-related information processing means 13 extracts the copyright protection method selection information 1 or the copyright protection method selection information 2 from the digital copy control descriptor in the multiplexed program-related information, and Output to In the case of the component specified by the component tag, the copyright protection method selection information 2 is used.
Is output as copyright protection system selection information. When the copyright protection method selection information is “001” or “011”, the copyright protection method selection control means 14 sends a signal to the first copyright protection means 15 a to select at least the first copyright protection method. And outputs "1" as the first copyright protection system selection signal. When the copyright protection method selection information is “010” or “011”, the copyright protection method selection control means 14 selects at least the second copyright protection method. "1" is output as the second copyright protection system selection signal.

The operation of the first copyright protection unit 15a and the second copyright protection unit 15b will be described with reference to FIGS. 2 and 3. 2, the first copyright protection unit 21a of the first copyright protection unit 15a performs a copyright protection process on the video signal or the audio signal output from the source decoding unit 10. The copyright protection processing referred to here is, for example, an AGC processing that cannot be normally recorded on a VCR having an analog input.
(Automatic gain control) Signal processing according to the pseudo pulse method is shown. Also, for example, CGM for performing copy generation management
The signal processing according to the method of multiplexing S (Copy Generation Management System) information in the vertical blanking period of a video signal is shown. The first selector 22a uses, for example, a first copyright protection mode selection signal for selecting the first copyright protection mode output by the copyright protection mode selection control unit 14, and outputs the first copyright protection mode selection signal.
When the copyright protection system selection signal is "1", the first copyright protection system is selected, and the copyright protected video signal or audio output from the first copyright protection unit 21a is output. Select the signal and use the first copyright protection means 15
Output to the second copyright protection unit 15b as the output of a. When the first copyright protection method selection signal is "0", the first copyright protection method is not selected,
The video signal or the audio signal which is not subjected to the copyright protection processing input from the source decoding means 10 is selected and output to the second copyright protection means 15b as the output of the first copyright protection means 15a. In FIG. 3, the second copyright protection unit 21b of the second copyright protection unit 15b performs a copyright protection process on the video signal or the audio signal output from the first copyright protection unit 15a. Here, the copyright protection processing refers to a processing other than the copyright protection processing performed by the first copyright protection unit 15a among a plurality of copyright protection processing methods. The second selector 22b uses, for example, a second copyright protection system selection signal for selecting the second copyright protection system output from the copyright protection system selection control unit 14, and outputs the second copyright protection system selection signal. When the system selection signal is "1", the second copyright protection system is selected, and the video signal or the audio signal subjected to the copyright protection processing output from the second copyright protection means 21b is selected. And the second copyright protection means 1
5b is output to the signal output device 12. Also,
When the second copyright protection system selection signal is "0", it means that the second copyright protection system is not selected, and the video signal or audio signal input from the first copyright protection unit 15a is selected. Then, the signal is output to the signal output device 12 as an output of the second copyright protection unit 15b. Therefore, the first copyright protection means 15a and the second copyright protection means 15b are used to switch the copyright protection processing according to the copyright protection method selection information from the copyright protection method selection control means 14, respectively. be able to. Thus, in the broadcast signal transmission method according to the present embodiment, a program including video, audio, and data, program-related information that is information related to the program,
In addition, since the video or audio included in the program is transmitted by multiplexing the copyright protection system selection information necessary for selecting and processing the copyright protection system in the receiving device, for example, the corresponding video or audio On the other hand, it is possible to realize a broadcasting system that can provide a viewer with a receiving apparatus that allows the receiving apparatus to select one of a plurality of copyright protection schemes or simultaneously process a plurality of copyright protection schemes. Furthermore, a program including video, audio, and data, program-related information that is information related to the program, and video or audio included in the program are necessary for a receiving apparatus to select and process a copyright protection method. In a receiving apparatus for receiving a broadcast signal in which copyright protection scheme selection information is multiplexed and transmitted, a plurality of copyright protection scheme selection control means are used based on the multiplexed and transmitted copyright protection scheme selection information. Since the copyright protection processing is performed by switching the copyright protection means, for example, for a corresponding video or audio, the receiving apparatus selects one of a plurality of copyright protection schemes or simultaneously performs a plurality of copyright protection schemes. A receiving device capable of processing the scheme can be provided to the viewer. In the present embodiment, a case has been described in which two copyright protection schemes are independently switched for processing, but the copyright protection schemes are not limited to the two schemes. As for the copyright protection method, a signal processing method according to an AGC (automatic gain control) pseudo pulse method and a signal according to a method of multiplexing CGMS information for performing copy generation management in a vertical blanking period of a video signal. Although the processing method has been described as an example, this is an example, and the copyright protection method is not limited to these two methods.

[0025]

As described above, according to the broadcast signal transmission method according to the present invention (claim 1), a program including video, audio, and data, program-related information that is information related to the program, and program related information Since the video or audio included in the program is transmitted by multiplexing the copyright protection system selection information necessary for selecting and processing the copyright protection system at the receiving device, for example, Thus, there is an effect that a broadcasting system can be realized in which a receiving apparatus can provide a viewer with a receiving apparatus capable of selecting one of a plurality of copyright protection schemes or simultaneously processing a plurality of copyright protection schemes.

According to the receiving apparatus of the present invention (claim 2), a program including video, audio, and data, program-related information that is information related to the program, and video or audio included in the program Is a receiving apparatus for receiving a broadcast signal in which copyright protection scheme selection information necessary for selecting and processing a copyright protection scheme in a receiving apparatus is multiplexed and transmitted. Based on the copyright protection scheme selection information, the copyright protection scheme selection control means for selecting the copyright protection scheme for the video signal or audio signal, and a plurality of copyright protection means for the video signal or audio signal, For example, the receiving apparatus selects one of a plurality of copyright protection schemes from a plurality of copyright protection schemes or processes a plurality of copyright protection schemes at the same time from the receiving apparatus. There is an effect that can door.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a broadcast signal transmission method and a receiving device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of a first copyright protection unit 15a in FIG. 1 in the present embodiment.

FIG. 3 is a diagram showing a configuration of a second copyright protection unit 15b in FIG. 1 in the present embodiment.

FIG. 4 is a diagram showing an example of a digital copy control descriptor when the copyright protection method selection information generated by the copyright protection method selection information generating means 6 in FIG. 1 in the present embodiment is added.

FIG. 5 is a diagram showing an example of a selected copyright protection scheme indicated by copyright protection scheme selection information 1 and copyright protection scheme selection information 2 in FIG. 4 in the present embodiment.

FIG. 6 is a diagram showing the configuration of a conventional system that digitizes video, audio, and data, and converts what is sent out through a sending transmission line from digital to analog and displays it.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Signal source 2 Source encoding means 3 Multiplexing means 4 Channel encoding means 5 Program related information generating means 6 Copyright protection system selection information generating means 7 Transmission path 8 Channel decoding means 9 Demultiplexing means 10 Source decoding means 12 Signal output device 13 Program-related information processing means 14 Copyright protection system selection control means 15a First copyright protection means 15b Second copyright protection means

Claims (2)

[Claims] 1. A program including video, audio, and data, program-related information that is information related to the program, and a copyright protection scheme indicating selection of a copyright protection scheme for video or audio included in the program. A broadcast signal transmission method for multiplexing and transmitting selection information. 2. A program including video, audio, and data, program-related information that is information related to the program, and a copyright protection scheme indicating selection of a copyright protection scheme for video or audio included in the program. A receiving apparatus for receiving a broadcast signal in which selection information is multiplexed and transmitted, wherein a copyright protection method for a video signal or an audio signal is determined based on the multiplexed and transmitted copyright protection method selection information. A receiving device comprising: a copyright protection scheme selection control means to be selected; and a plurality of copyright protection means for a video signal or an audio signal.