JP4329144B2 - Transmitting apparatus, receiving apparatus, and program transmission method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a transmission apparatus, a reception apparatus, and a program transmission method, and can be applied to, for example, digital satellite broadcasting. The present invention provides various programs by a program for a specific area, etc. by setting and transmitting a transmission side identification code corresponding to a reception side identification code set for each receiving device to a video signal and / or an audio signal. To be able to.
[0002]
[Prior art]
Conventionally, in digital satellite broadcasting, video signals and audio signals are packetized and transmitted by time division multiplexing to provide a larger number of programs from one satellite. In digital satellite broadcasting, in order to obtain a packet constituting a desired program from packets multiplexed and transmitted in this manner, various data are packetized and transmitted together.
[0003]
That is, FIG. 1 is a block diagram showing this type of digital satellite broadcasting system. In the digital satellite broadcasting system 1, the ground station 2 receives a baseband video signal SV and an audio signal SA from various program providers, for example, and compresses data by the encoders 3A to 3N to generate a transport stream. Here, this processing is performed according to ITU-T recommendation H.264. 262. ISO / IEC 13818-2 and ISO / IEC 13818-3 based encoding process, ITU-T recommendation H222.0. It is executed by a multiplexing process according to a method defined by ISO / IEC13818-1. In the ground station 2, these transport streams are packetized and time-division multiplexed and transmitted.
[0004]
The EPG generator (EPGGEN) 4 generates and outputs an EPG (Electronic Program Guide) which is one of the data to be packetized and transmitted in this manner. Here, the EPG is a program guide based on a program name, introduction of the contents of the program, a future broadcast schedule, and the like. The EPG generator 4 obtains data scheduled to be broadcast from each program provider and generates an EPG.
[0005]
The EMM generator (EMMGEN) 5 generates an EMM (Entitlement Management Message), which is one of data to be packetized and transmitted in this way, and outputs the generated EMM to the multiplexing device 7. Here, the EMM is reception contract information of each receiving terminal, and the digital satellite broadcasting system 1 can periodically transmit this EMM and view the scrambled broadcast contracted by each receiving terminal.
[0006]
The MUX controller 6 controls the operation of the multiplexer (MUX) 7, and the multiplexer 7 packetizes each transport stream and creates one multiplexed stream by time division multiplexing. The MUX controller 6 instructs the multiplexer 7 to set PSI (Program Specific Information) such as PMT (Program Map Table) and PAT (Program Association Table).
[0007]
Here, the PSI is program specification information which is a program selection criterion, and includes PMT, PAT, and the like. The PMT is data for specifying a packet of one program, and is set for each program. PAT is data for specifying the PMT.
[0008]
That is, as shown in FIG. 10, in the digital satellite broadcasting system 1, a packet ID (PID) is set for each packet corresponding to the transport stream. In this case, for example, one channel is constituted by a packet (Video 1) based on a video signal and a packet (Audio 1) based on an audio signal, and the PIDs of the packets (Video 1) and (Audio 1) based on the video signal and the audio signal are 0x0100 and 0x0101, respectively. And when the PID of the time information packet PCR (Program Clock Reference) 1 when demodulating these video and audio signals is set to 0x01ff, in this channel, in the corresponding PMT, PID0x0100, 0x0101, and 0x01ff are specified. Here, xx means hexadecimal.
[0009]
Similarly, one channel is constituted by a packet (Video 2) based on a video signal and a packet (Audio 2) based on an audio signal, and the PIDs of the packets (Video 2) and (Audio 2) based on the video signal and the audio signal are 0x0200 and 0x0201, respectively. When the PID of PCR2 is set to 0x02ff, in this channel, these PIDs 0x0200, 0x0201, and 0x02ff are specified in the corresponding PMT.
[0010]
In the third channel, if the PIDs of the video signal packet (Video 3), the audio signal packet (Audio 3), and the PCR3 packet are set to 0x0300, 0x0301, and 0x03ff, respectively, in this program, the corresponding PMT These PIDs 0x0300, 0x0301, and 0x03ff are specified.
[0011]
Further, in the PMT packet for specifying the PID of each program in this way, a PID is assigned, and the PID of these PMTs is specified by the PAT. That is, the PAT describes at least the channel number and the PID of the PMT for each channel. The PAT PID is fixed to 0x0000 (0x means hexadecimal).
[0012]
As a result, the digital satellite broadcasting system 1 can demodulate the video signal, audio signal, and reference time information for a desired program by sequentially decoding the PID packet specified by the PMT by sequentially tracing the PAT and PMT. Has been made.
[0013]
A modulation circuit (MOD) 8 modulates this multiplexed stream. The ground station 2 generates a plurality of modulation signals obtained by time-division multiplexing a plurality of programs in this way, frequency-multiplexes the plurality of modulation signals, and uplinks them from the antenna 9 to the satellite 10.
[0014]
On the user side, a broadcast wave downlinked from the satellite 10 is received by the antenna 12 and input to the receiving terminal 11. Here, the receiving terminal 11 selectively receives a broadcast wave of a predetermined frequency in response to a user's selection operation and demodulates the multiplexed stream. Further, a PID packet specified by the PAT and PMT is selected from the multiplexed stream to reproduce a transport stream based on a video signal and an audio signal, and a video signal and an audio signal are reproduced from the transport stream.
[0015]
On the user side, the video signal and the audio signal are monitored by the monitor device 15 so that a desired program can be viewed. In this way, when viewing the broadcast, the receiving terminal 11 can display the contents of the EPG on the monitor device 15 by the user's operation, thereby confirming the broadcast schedule and the like and selecting a desired program. ing.
[0016]
Note that this type of receiving terminal 11 can notify the customer management system 17 of a pay program viewing result and a pay program viewing reservation via the telephone line 16.
[0017]
[Problems to be solved by the invention]
By the way, in the digital satellite broadcasting system, a large number of programs can be provided in a wide area, but on the other hand, it is difficult to broadcast by replacing commercials or the like for each specific area as in the case of terrestrial television broadcasting. is there.
[0018]
The present invention has been made in consideration of the above points, and intends to propose a transmission apparatus, a program transmission method, and a corresponding reception apparatus that can provide various programs by a program for a specific area.
[0019]
[Means for Solving the Problems]
In order to solve this problem, the invention according to claim 1 is applied to a transmission device, The receiving device for receiving the video signal and the audio signal is provided with a receiving side identification code for controlling reception of the program, The transmitter is in front Receiver identification code Corresponding to the above, a permission code for permitting reception of the video signal and / or audio signal and a prohibition code for prohibiting reception are set to transmit the video signal and / or audio signal .
[0020]
Further, in the invention according to claim 5, it is applied to the receiving device, and is set to the receiving side identification code and the video signal and / or the audio signal acquired in advance. A permission code that permits reception and a prohibition code that prohibits reception The transmission target of the video signal or the audio signal is determined by comparing the above.
[0021]
Further, in the invention according to claim 10, it is applied to a program transmission method, and is set to an individual receiving device by a transmitting device. Corresponding to the receiving side identification code for controlling the reception of the program, a permission code for permitting reception of the video signal and / or audio signal and a prohibition code for prohibiting reception are set, and the video signal and / or audio signal are transmitted. , In the receiving device, the receiving side identification code acquired in advance and the video signal and / or audio signal are set. The permission code and the prohibition code And the transmission target of the video signal or the audio signal is determined.
[0022]
According to the configuration of the first aspect, the receiving side identification code provided in each receiving device is applied to the transmitting device. Corresponding to Video signal and / or audio signal Permission codes and prohibition codes By setting the receiver identification code and Permit code and prohibition code It is possible to send a video signal and an audio signal by making it possible to identify on the receiving side whether or not it is a video signal or an audio signal that is recommended to be received. Can be provided.
[0023]
According to the configuration of claim 5, the reception side identification code and the video signal and / or audio signal set in advance are applied to the receiving device. Permit code and prohibition code By comparing the transmission target of the video signal or the audio signal with the comparison, it is possible to determine whether or not each video signal and the audio signal are recommended on the transmission device side. It is possible to view various programs provided by the regional program.
[0024]
According to the configuration of the tenth aspect, the receiving side identification code provided in each receiving device is applied from the transmitting device to the program transmission method. Corresponding to Video signal and / or audio signal Permission codes and prohibition codes Set in the receiving device's identification code, video signal and / or audio signal acquired in advance in the receiving device. Permit code and prohibition code If the transmission target of the video signal or the audio signal is determined by comparison with the receiver, the reception side identifies whether the video signal or the audio signal is recommended for reception based on the correspondence between the reception side identification code and the transmission side identification code Thus, it is possible to transmit video signals and audio signals, and for example, various programs can be provided by a program for a specific area.
[0025]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
[0026]
(1) Configuration of the embodiment
In this embodiment, the digital satellite broadcasting system broadcasts a program by specifying a region to be broadcast by a region code. The digital satellite broadcasting system according to the embodiment has the same configuration as the digital satellite broadcasting system 1 described above with reference to FIG. 1 except that the configuration of the EMM generator, the configuration of the receiving terminal, and the related configuration are different. Thus, in FIG. 1, the digital satellite broadcasting system according to this embodiment will be described with a configuration different from that of the conventional system shown by reference numerals in parentheses.
[0027]
That is, in the digital satellite broadcasting system 20 according to the present embodiment, the ground station 22 transmits audio signal packets for the western Japan and the eastern Japan for one video signal for each predetermined channel. Corresponding to this, the ground station 22 enables the receiving terminal 21 to identify the audio signals for the west Japan and the east Japan by the description of the PMT.
[0028]
That is, in the PMT packet, as shown in the section of FIG. 2, a table ID (table ID) indicating the PMT is described by 8 bits, and subsequently a section syntax indicator (fixed value of 1) ( Section Syntax indicator) is described. Subsequently, after a fixed value ('0') of value 0 is described, 2 reserved bits (reserved) are allocated.
[0029]
Subsequently, a 12-bit section length (section 1ength) indicating the number of bytes up to an error correction code (CRC: Cyclic Redundancy Check) assigned at the end is described, and a 16-bit channel number (program number) specified by this PMT ) Reserved bits (reserved) of 2 bits are sequentially allocated.
[0030]
Subsequently, a version number (version number) is described by 5 bits indicating the version of the PMT, and the version number is incremented when the PMT is updated. Subsequently, a 1-bit current next indicator indicating whether or not this PMT is currently set, that is, whether or not this PMT is currently usable, is described, followed by a section number constituting this PMT. (Section number) describes the last section number (last section number) of all sections defined by the PMT. In the PMT, a fixed value of “0x00” is set for the section number due to its nature, and a fixed value of “0x00” is also set for the last section number (last section number).
[0031]
Subsequently, after a reserved bit (reserved) of 3 bits is assigned to the PMT, a PID (PCR PID) of a PCR packet specified by the PMT is described, and a reserved bit (reserved) of 4 bits is assigned. Subsequently, the PMT describes the number of bytes (Program info length) of a descriptor that defines a packet (that is, an elementary stream packet) such as video and audio specified by the PMT, and then the PMT. A descriptor common to the channels specified by is described (descriptor ()).
[0032]
Further, the descriptor of each elementary stream is described in the PMT. Here, in the descriptor of each elementary stream, a reserved bit (reserved) of 3 bits is assigned following the description (stream type) indicating the type of the elementary stream such as a video signal and an audio signal, and the corresponding packet is assigned. An ID (elementary PID) and a reserved bit (reserved) are described. Subsequently, the number of bytes (ES info 1ength) of the following information (descriptor ()) about this elementary stream is described, and a detailed descriptor (descriptor ()) (for the elementary stream by this packet ID (elementary PID) ( Is indicated).
[0033]
In this embodiment, the detailed descriptor (descriptor ()) describes that the packet is an audio signal packet for west Japan and east Japan.
[0034]
That is, as shown in FIG. 3, the MUX controller 26 (Allowed region descriptor ()) for an elementary stream for a specific region, a tag (descriptor tag) indicating that the destination is described, and the byte length of the description After (descriptor 1ength) is continued, a region code (region code) for specifying a destination is described.
[0035]
On the other hand, as shown in FIG. 4, when it is described that this elementary stream is not recommended at a specific destination (Denied region descriptor ()), a tag (descriptor tag) to that effect is described. After the byte length (descriptor 1ength) is continued, the region code (region code) of the region that is not the destination is described.
[0036]
Specifically, as shown in FIG. 5, the MUX controller 26 sequentially describes the PMTs according to the description stipulated in the PMT, describes the elementary stream type (stream type) for the video stream, and then the corresponding packet. Describe ID (elementary PID) 0x0120, set the number of bytes (ES info 1ength) of the following information (descriptor ()) to 0, and complete the descriptor for this video stream.
[0037]
Subsequently, for the audio stream, the elementary stream type (stream type) is described, the corresponding packet ID (elementary PID) 0x0121 is described, and the number of bytes (ES info 1ength) of the following information (descriptor ()) is set. In this case, by subsequently describing the region code, the number of bytes required for this description is described in this number of bytes (ES info 1ength).
[0038]
Further, the MUX controller 26 sets a tag indicating that it is a descriptor indicating the destination (descriptor tag), and continues the byte length (descriptor 1ength) of the description. Further, when the destination of the voice packet with the packet ID (elementary PID) 0x0121 is for eastern Japan, the region code 100 indicating eastern Japan is described in the region code.
[0039]
In the MUX controller 26, subsequently, for an audio stream for West Japan, the type of elementary stream (stream type), packet ID (elementary PID) 0x0122, and the number of bytes (ES info 1ength) are set to indicate West Japan. The region code 200 is described in the region code.
[0040]
Furthermore, the ground station 2 further notifies each receiving terminal of the area code of each receiving terminal 21 by EMM. That is, the ground station 2 notifies each receiving terminal 21 of the corresponding area code so as to correspond to the area code set for each channel from the installation location information of the receiving terminal 21 notified from the customer management system 17. The EMM is sent periodically (for example, every 15 minutes) and can include mail addressed to individuals from the center, so that the ground station 2 notifies the area code by the description of the descriptor of this EMM. .
[0041]
Thus, the area code notified by the EMM in this way constitutes a receiving side identification code set for each receiving terminal, whereas the area code added to the PMT corresponds to this receiving side identification code. Thus, the transmission side identification code set in the video signal or the audio signal is configured.
[0042]
FIG. 6 is a block diagram showing the receiving terminal 21. In the receiving terminal 21, the tuner 30 receives broadcast waves on a channel desired by the user under the control of the system controller 31 and outputs a multiplexed stream. The demultiplexer 32 selects and outputs a program packet desired by the user from the multiplexed stream output from the tuner 30 under the control of the system controller 31. The decoder 33 demodulates and outputs the video signal, the audio signal, and further the data by the data broadcast by processing the data of the packet by expanding the data.
[0043]
The receiving terminal 21 outputs the video signal and audio signal demodulated in this way to the monitor device 15 so that a desired program can be viewed. Data by data broadcasting is output to an external device via, for example, a dedicated port, RS-232C port, or the like.
[0044]
The adder circuit 34 is arranged on the output side of the decoder 33, adds the video signal and / or audio signal output from the system controller 31 to the video signal and / or audio signal output from the decoder 33, and outputs the result. Instead of the video signal and / or audio signal output from the decoder 33, the video signal and / or audio signal output from the system controller 31 is output. As a result, the receiving terminal 21 can display a menu screen using a graphical user interface, various information acquired by connecting to the Internet, and output an alarm sound or the like as necessary.
[0045]
The modem 35 sends desired data to the telephone line 16 under the control of the system controller 31 and acquires desired data via the telephone line 16. Accordingly, the receiving terminal 21 can be connected to the customer management system 17 as necessary, and can perform online shopping and the like.
[0046]
The system controller 31 is a central processing unit, and controls the overall operation of the receiving terminal 21 in response to the operation of the operation unit 36 and the like by executing processing procedures recorded in a memory circuit (not shown).
[0047]
That is, the system controller 31 acquires the packet ID of the channel desired by the user from the PAT, PID, and PMT output from the demultiplexer 32 in response to the operation of the operation element 36 by the user. Further, by instructing the demultiplexer 32 to process the acquired packet ID, the channel desired by the user is received and output to the monitor device 15. Furthermore, the system controller 31 acquires the EMM sent at a fixed period from the demultiplexer 32, and acquires the contract information described in this EMM. The system controller 31 receives the scrambled broadcast by controlling the operation of the decoder based on the contract information as necessary.
[0048]
At this time, the system controller 31 also acquires a region code from the EMM. Furthermore, when the region code is added to the PMT, the system controller 31 matches the region code acquired from the EMM according to the tag (discriptor tag) (FIG. 5) only when the user has not set otherwise. The operation of the demultiplexer 32 is controlled so that the elementary stream to which the region code is added is selectively received and, conversely, is not received. That is, the elementary stream for the specific region described above with reference to FIG. 3 (Allowed region descriptor ()) is selectively received. Also, an elementary stream not recommended in the specific destination described above with reference to FIG. 4 (Denied region descriptor ()) is not selectively received.
[0049]
On the other hand, if the user makes a different setting, the user is notified via the monitor device 15 that the program is an area code added, and an element recommended by the area code is specified by the user. The demultiplexer 32 is instructed to select the elementary stream or the user-selected elementary stream.
[0050]
(2) Operation of the embodiment
In the above configuration, in the digital satellite broadcasting system 20 (FIG. 1), after a plurality of programs by the video signal SV and the audio signal SA, data by data broadcasting, etc. are compressed, they are added as PAT, PMT, EMM, etc. A multiplexed stream is formed by time division multiplexing with the information, and the multiplexed stream is frequency multiplexed and uplinked to the satellite 10. In the digital satellite broadcasting system 20, the broadcast wave generated in this way is downlinked by the satellite 10 and received by the receiving terminal 21.
[0051]
When various programs are transmitted in this way, on the ground station 22 side, for example, for a specific program, a program is constituted by a common video signal, an audio signal for West Japan, and an audio signal for East Japan. That is, each elementary stream of the common video signal, the audio signal for west Japan, and the audio signal for eastern Japan is packetized, and is time-division multiplexed and transmitted together with the packets of other elementary streams.
[0052]
At this time, the packet ID (PID) related to this program is designated by the additional information PAT and PMT, and these programs are transmitted so that the packets constituting one program can be selectively acquired from many packets. In this PMT, the description of the descriptor defining the elementary stream of the video signal (FIGS. 2 to 5) specifies that the elementary stream by this video signal is an elementary stream that is common in the reception area, and is transmitted. The
[0053]
Regions that identify West Japan and East Japan, which are some of the receivable regions, in the descriptor descriptions that define each elementary stream using audio signals for West Japan and each elementary stream using audio signals for East Japan. As a result, a code is assigned, so that the elementary streams based on these audio signals are designated and transmitted as audio recommended for viewing in the area corresponding to the area code.
[0054]
Further, from the installation location information of each receiving terminal 21 detected by data communication with the receiving terminal 21 executed in the customer management system 17, EMM which is additional information for communication with each receiving terminal 21 is added to the PMT. The area code of each receiving terminal 21 corresponding to the area code is set and transmitted.
[0055]
In the receiving terminal 21 (FIG. 6), the broadcast wave transmitted in this way is received by the antenna 12, the desired broadcast wave is selected by the tuner 30, and the multiplexed stream is demodulated. Further, PAT and PMT are selected from the multiplexed stream by the demultiplexer 32, and a packet specified by the PAT and PMT is demodulated by the decoder 33 under the control of the system controller 31. As a result, the receiving terminal 21 can view the video signal and the audio signal for the desired program by the monitor device 15.
[0056]
At this time, in the receiving terminal 21, the area code of the receiving terminal 21 that is the receiving side identification code is detected by the EMM received at a constant period. Further, an elementary stream to which an area code is added by the PMT is detected, and the destination of the elementary stream by the audio signal is determined by comparing the area code acquired from the EMM with the area code set in the PMT.
[0057]
If the user terminal has not been set otherwise, the receiving terminal 21 selectively demodulates an elementary stream based on an audio signal having the installation location as the destination based on the determination result, and vice versa. Thus, for example, when the receiving terminal 21 is installed in western Japan, a common video signal and an audio signal for western Japan are output from the monitor device 15.
[0058]
That is, when there is an elementary stream (Allowed region descriptor ()) for the specific area described above with reference to FIG. 3, this elementary stream is selectively received at the receiving terminal side, whereas the specific stream described with reference to FIG. The system controller 31 controls the operation of the demultiplexer 32 so as not to receive the elementary stream (Denied region descriptor ()) that is not recommended at the destination. As a result, the digital satellite broadcasting system 20 can provide various programs by a program for a specific area.
[0059]
That is, in this case, as shown in FIG. 7, for example, the region codes of regions A, B, and C are set to 100, 200, and 300, respectively, and the first and second video signals (videos 1 and 2), first and second When one program is composed and broadcast with two audio signals (audio 1 and audio 2), these video signals and audio signals are automatically received in each area (indicated by a symbol ◯) according to the description of the PMT, Further, it is not automatically received (indicated by a symbol x), and can be viewed by selection (indicated by a symbol Δ).
[0060]
In addition, as shown in FIG. 8 in comparison with FIG. 7, by describing a descriptor so that a plurality of area codes are specified by one tag, these video signals and audio signals are automatically received in a plurality of areas. In addition, it is possible to prevent automatic reception.
[0061]
Further, as shown in FIG. 9, it is possible to set so that programs with different audio and video images are automatically received in two regions A and C excluding a part of region B, as shown in FIG.
[0062]
On the other hand, in the receiving terminal 21, if the user makes a different setting, the user is notified via the monitor device 15 that the program is an area code added, and the area code is specified by the user. A recommended audio signal or a user-selected audio signal is provided from the monitor device 15.
[0063]
In this type of digital satellite broadcasting system, when it is difficult to analyze the descriptor set in this way on the receiving terminal side, such a description is ignored on the receiving terminal side, so that it must be operated by the user's selection operation. Although not necessary, it is possible to view a program for each destination even on an existing receiving terminal.
[0064]
(3) Effects of the embodiment
According to the above configuration, the area code that is the transmission side identification code is set in the video signal and / or the audio signal so as to correspond to the area code that is the reception side identification code set in each receiving device via the EMM. Thus, various programs can be provided by a program for a specific area.
[0065]
In particular, by notifying this kind of area code by setting descriptors in EMM and PMT, the area specified by the area code can be changed variously as necessary, and the program providing area can be specified flexibly. In addition, compatibility with the existing receiving terminal can be maintained so that reception is possible.
[0066]
(4) Other embodiments
In the above-described embodiment, when one program is composed of two video signals and two audio signals and broadcasts to each destination, one video signal is transmitted by two audio signals. The case where a program is composed and broadcast to each destination has been described. However, the present invention is not limited to this, and one program is composed of two or more video signals and two or more audio signals as necessary. It can be widely applied to broadcasting on the ground.
[0067]
Further, in the above-described embodiment, the case where the EMM notifies the area code which is the receiving side identification code corresponding to the installation location of each receiving terminal has been described. However, the present invention is not limited to this, and is notified through a telephone line. You may do it.
[0068]
In the above-described embodiment, the case where the program is switched and provided depending on the region has been described. However, the present invention is not limited to this and is widely applied to the case where the program is switched and provided by user registration instead of the region. can do. In this case, for example, when providing news or the like in multiple languages, a program can be provided to each receiving terminal so that commentary in English, commentary in German, and the like can be selectively received.
[0069]
In the above-described embodiment, the case where the present invention is applied to a digital satellite broadcast receiving terminal has been described. However, the present invention is not limited to this, and reception of cable television broadcasts, conventional terrestrial television broadcasts, and the like. It can be widely applied to terminals. Incidentally, in the case of terrestrial television broadcasting, a transmission side identification code is inserted and transmitted, for example, in a blanking period of a video signal, and this transmission side identification code is transmitted as the main audio and sub audio of the current dual sound. It can also be applied to switching.
[0070]
【The invention's effect】
As described above, according to the present invention, a program for a specific area is set by transmitting a transmission-side identification code corresponding to a reception-side identification code set for each receiving device to a video signal and / or an audio signal. Various programs can be provided.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a digital satellite broadcasting system according to an embodiment of the present invention.
FIG. 2 is a chart for explaining PMT in the digital satellite broadcasting system of FIG. 1;
3 is a chart showing a description of the descriptor of the PMT in FIG. 2. FIG.
4 is a chart showing a description of a descriptor of a PMT according to another example of FIG. 3. FIG.
FIG. 5 is a chart showing a specific description of a PMT descriptor.
6 is a block diagram showing a receiving terminal of the digital satellite broadcasting system of FIG. 1. FIG.
FIG. 7 is a chart showing a behavior of a receiving terminal according to a receiving area.
8 is a chart showing the behavior of a receiving terminal according to a descriptor description different from FIG.
FIG. 9 is a chart showing the behavior of a receiving terminal according to a descriptor description different from those in FIGS. 7 and 8;
FIG. 10 is a chart for explaining PAT.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1,20 ... Digital satellite broadcasting system, 2, 22 ... Broadcasting station, 5, 25 ... EMM generator, 6, 26 ... MUX controller, 11, 21 ... Receiving terminal, 31 ... System controller, 32 ... ... Demultiplexer

Claims (10)

In a transmission device that transmits a program composed of at least a video signal and an audio signal,
The video signal and / or audio signal is transmitted by setting a region code for specifying a region where reception of the video signal and / or audio signal is permitted and a region code for specifying a region where reception is prohibited. Transmitting device. Packetizing the video signal and audio signal together with additional information, respectively, and sending a plurality of programs by time division multiplexing,
Identifying the video signal and audio signal packets constituting one program by the additional information,
The transmission apparatus according to claim 1, wherein the area code is assigned to the additional information and transmitted. The transmission apparatus according to claim 2 , wherein an area code for specifying an area where the reception apparatus is installed is notified to the reception apparatus of the video signal and / or the audio signal by the additional information. In a receiving apparatus for receiving a program composed of at least a video signal and an audio signal,
The area code that identifies the area where the receiving device is installed in advance, the area code that identifies the area that is permitted to be received set in the video signal and / or audio signal, and the area that is prohibited from receiving A receiving apparatus for determining a destination of the video signal or the audio signal by comparing with a region code .   The receiving apparatus according to claim 4, wherein reception of the video signal or audio signal is stopped based on the determination result. The video signal and the audio signal are respectively packetized and time-division multiplexed with additional information and transmitted,
The receiving device is:
Identifying and receiving the video signal and audio signal packets constituting one program by the additional information,
The receiving apparatus according to claim 5, wherein the area code set in the video signal and / or audio signal is acquired from the additional information. The receiving apparatus according to claim 6, wherein an area code that specifies an area in which the receiving apparatus is installed is acquired based on the additional information. In a program transmission method for transmitting a program composed of at least a video signal and an audio signal from a transmission device to a plurality of reception devices,
The video signal and / or audio signal is transmitted by setting a region code for specifying a region where reception of the video signal and / or audio signal is permitted and a region code for specifying reception prohibited from the transmission device. And
In the receiving device, the destination of the video signal or the audio signal is obtained by comparing a region code specifying the region where the receiving device is acquired in advance with a region code set in the video signal and / or the audio signal. A program transmission method characterized by determining a ground. Packetizing the video signal and audio signal together with additional information, respectively, and transmitting a plurality of programs by time division multiplexing,
Identifying the video signal and audio signal packets constituting one program by the additional information,
9. The program transmission method according to claim 8, wherein a region code set in the video signal and / or audio signal is assigned to the additional information and transmitted. 10. The program transmission method according to claim 9, wherein a region code for specifying a region where the receiving device is installed is notified by the additional information.

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