JP2003153205A - Reception system, microcomputer, lsi circuit, digital broadcast system, reception method, program, and medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reception system, a microcomputer, an LSI circuit, a digital broadcast system, a reception method, a program, and a medium that can surely ensure a replace packet that can be replaced with an SIT (Selection Information Table) packet. SOLUTION: The reception system 3 is characterized in to comprise: a reception section 13 that receives a transport stream where program contents and electronic program guide information are multiplexed; a PID (Packet Identifier) designation section 28 that designates PIDs of other packets than an NIT (Network Information Table) packet as replace PIDs; replace PID storage devices 17, 24; an SIT generation processing section 21; and a packet extract replacement section 26 that can replace the replace packets and the NIT packet with the SIT packet.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a receiving system, a microcomputer, an LSI circuit, a digital broadcasting system, a receiving method, a program, and a medium.

[0002]

2. Description of the Related Art With the development of digital image / audio technology utilizing MPEG2, digital multi-channel broadcasting by a communication satellite has already been put into practical use. Therefore, the configuration of a conventional digital broadcasting system will be described with reference to FIG. However, FIG. 9 is a configuration diagram of a digital broadcasting system 151 according to a conventional technique.

The digital broadcasting system 151 is a transmission system 1 for generating and transmitting a transport stream.
02 and a receiving system 153 for receiving the transport stream and outputting it to the display 4 or the recording device 5. The satellite repeater (transponder) 6 is a device that relays radio waves and is mounted on the communication satellite 7.

Next, the configuration of the transmission system 102 in the conventional technique will be described.

The transmission system 102 is a system having a program selection related data generator 109, a packet multiplexer 10, and the like.

The encoder 8 is a part having an MPEG2 video encoder for digital video compression encoding and an MPEG2 audio encoder for digital audio compression encoding. That is, the encoding unit 8 is a unit that generates a packet stream including packets having program contents and outputs the packet stream to the packet multiplexing unit 10.

The program selection related data generation unit 109 uses the program specification information (PSI, Program Speci
packet having service information (SI), and service information (SI, Service Information)
This is a part for generating a packet stream composed of packets having a math) and outputting it to the packet multiplexing unit 10. However, the program specification information is NIT (N
network Information Tabl
e), PAT (Program Associate)
n Table), PMT (Program Map)
The service information is SDT (Service Description).
n Tabla), EIT (Event Information)
application Table).
In this way, the program selection related data generation unit 109 generates a packet stream including packets having the content of the program selection related data, and the packet multiplexing unit 10
Is the part to be output to.

The packet multiplexing unit 10 outputs a packet stream consisting of packets having the content of the program output from the encoding unit 8 and the program selection related data generating unit 1.
And a packet stream composed of packets having the content of program selection related data output from 09, is time-division multiplexed into one transport stream.

The transmission path coding unit 11 is a unit that adds an error correction code, an interleave process, and a synchronization signal (frame) to the transport stream output from the packet multiplexing unit 10. However, the interleave processing is performed in order to improve the error correction capability by changing the order of data transmission in byte units. The synchronization signal is added so that the reception byte 153 has a periodicity to facilitate synchronization in the reception system 153.

The modulator 12 applies four-phase phase shift keying (QPSK, Qua) to the signal output from the transmission path encoder 11.
Draw Phase Shift Keyin
g) is a part to be modulated. However, radio wave 1
47 is a transmission radio wave.

Next, the structure of the receiving system 153 in the prior art will be described.

The receiving system 153 is a system having a packet demultiplexing unit 166, a stream transmission processing unit 172 and the like.

The receiving section 13 is a section for receiving the radio wave 148 transmitted from the satellite repeater 6.

The demodulation section 14 is a section having a detection circuit for demodulating the radio wave 148.

The transmission line decoding unit 15 includes a transmission line encoding unit 10.
Is a part that restores the transport stream in which the transmission order is changed in byte units by the interleaving process in (1) to the original transport stream and performs error correction on the restored transport stream.

The packet demultiplexing unit 166 is a unit having a PID filter 169 and the like.

The PID designating unit 178 stores the PID of the packet having the content of the recorded program in the recorded PID storage unit 18.
Is the part that can be specified. The PID designating unit 178 is a unit that can designate the NIT PID (that is, the PID of the NIT packet) in the NIT PID storage unit 23. However, as will be described later, the recorded program is a program selected by an instruction from the outside.

The recording PID storage unit 18 includes a PID designating unit 1
It is a device that inputs a signal from 78 and stores the PID of a packet having the content of a recorded program.

The PID filter 169 is used in the transmission line decoding unit 1.
5 is a device for extracting a packet having the content of the recorded program pointed out by the recording PID storage unit 18, a packet having the program specification information, and a packet having the service information from the transport stream outputted from No. 5. However, the PID filter 169
Has a function of passing a packet having program specification information and a packet having service information as they are.

The output switching circuit 20 outputs the transport stream output from the PID filter 169.
This is a circuit for switching output for display / recording.

SIT (Selection Info)
(Operation Table) generation processing unit 21 uses the PID
From the service information output from the filter 169, SI
This is a part for generating and processing a T packet.

The stream transmission processing section 172 is a section having a SIT packet replacing unit 176 and the like.

The NIT PID storage unit 23 is a device which receives a signal from the PID designating unit 178 and stores the NITPID. As will be described later, the NIT packet is used as a replace packet that can be replaced with the SIT packet.

The SIT storage unit 25 includes the SIT generation processing unit 2
It is a device that stores the SIT packet that is generated and processed by 1.

The SIT packet replacer 176 uses the NIT
It is a device that can replace the NIT packet pointed out by the PID storage unit 25 with the SIT packet output from the SIT storage unit 25.

The packet modification unit 29 is a unit that can receive the signal output from the SIT packet replacing unit 176, modify the packet, and create a transport stream for recording. The generated transport stream is output to the recording device 5.

The decoding unit 27 decompresses the compression-coded video signal input from the output switching circuit 20.
PEG2 video decoder and output switching circuit 2
It is a part having an MPEG2 audio decoder for expanding a compression-coded audio signal input from 0. That is, the decoding unit 27 is a unit that decompresses the transport stream for display having the content of the compressed and encoded program and outputs the decompressed transport stream to the display 4.
The transport stream for display is video,
It is composed of transport packets containing audio content.

The display 4 includes a cathode ray tube for reproducing the video signal output from the decoding unit 27, and the decoding unit 27.
A device having a speaker for reproducing an audio signal output from the device.

The recording device 5 includes a SIT packet replacer 17
6 is a device for recording the recording transport stream output from the device 6.

FIG. 1 shows the operation of the conventional digital broadcasting system 151 having such a configuration.
The description will be made with reference to 0 as well. However, FIG. 10 is a conceptual diagram illustrating a process in which the transport stream 196 for recording is generated from the broadcast transport stream 144.

Here, the operation of the transmission system 102 in the prior art will be described in detail.

The encoding unit 8 includes a packet stream consisting of packets 130 and 138 having contents of program A, and a packet 131 having contents of program B,
A packet stream composed of 135 and 139 is generated, and these are output to the packet multiplexing unit 10.

The program selection related data generator 109
T packet 132, PMT packet 137, NIT packet 134, SDT packet 136, EIT packet 1
A packet stream composed of 33 is generated, and these are output to the packet multiplexing unit 10.

The packet multiplexing unit 10 multiplexes the packet stream output from the encoding unit 8 and the packet stream output from the program selection related data generating unit 109, and thereby the transport stream 144. Is generated and is output to the transmission path coding unit 11.

The transmission path coding unit 11 performs error correction code addition, interleave processing, and synchronization signal addition on the transport stream output from the packet multiplexing unit 10, and outputs this to the modulation unit 12.

The modulation section 12 modulates the transport stream output from the transmission path coding section 11 by four-phase phase shift keying, and transmits a radio wave 147 from the antenna.

The satellite repeater 6 receives the radio wave 147 and transmits the radio wave 148.

Next, the operation of the conventional receiving system 153 will be described in detail.

The receiving system 153 starts the receiving operation by selecting the program A as a recorded program according to an instruction from the outside. That is, the receiving system 153
The radio wave 148 is received from the satellite repeater 6, the information in the PAT in the transport stream is referred to, and the PM
Detect T. The PMT has the PID of the packet in which the stream related to program A is transmitted. The PID designating unit 178 uses the packet 1 having the content of the recorded program.
Recognize the PID of 30, 138 and record PID storage 18
Signal output to. In addition, the PID designation unit 178
Recognize the PID of the IT packet 134 and use the NIT PID
A signal is also output to the storage device 23.

The recording PID storage unit 18 has a PID designating unit 1
The signal is input from 78 and the PIDs of the packets 130 and 138 having the content of the program A are stored. Also, NIT
The PID storage unit 23 receives the signal from the PID designating unit 178 and stores the PID of the NIT packet 134.

The receiver 13 receives the radio wave 148 and outputs it to the demodulator 14.

The demodulation section 14 outputs the transport stream obtained by demodulating the radio wave 148 received by the reception section 13 to the transmission path decoding section 15.

The transmission path decoding unit 15 performs error correction on the transport stream output from the demodulation unit 14,
It restores the transport stream 144 and outputs it to the PID filter 169.

As already explained, the recording PID storage unit 18 stores the packet 130 having the content of the program A,
It stores the PID of 138. Therefore, record PI
D storage 18 stores packet 1 having the content of program A
30, 138 can be pointed to the PID filter 169.

The PID filter 169 is used by the transmission path decoding unit 1
5. From the transport stream 144 output from No. 5, packets 130, 138 having the content of program A pointed out by the recording PID storage 18 are extracted.
Further, the PID filter 169 receives P from the transport stream 144 output from the transmission path decoding unit 15.
The AT packet 132, the PMT packet 137, the NIT packet 134, the SDT packet 136, and the EIT packet 133 are extracted.

In this way, the PID filter 169 outputs the SDT and EIT to the SIT generation processing section 21. Further, the PID filter 169 uses the packets 130 and 138 having the content of the program A and the PAT packet 13
2, PMT packet 137, NIT packet 134, S
The transport stream 195 composed of the DT packet 136 and the EIT packet 133 is output to the output switching circuit 20.

The SIT generation processing unit 21 processes the SDT and EIT output from the PID filter 169 to generate SIT packets 141 and 142 from the necessary service information, and outputs them to the SIT storage unit 25. SI
The T storage unit 25 outputs the SIT packets 141 and 142 output from the SIT generation processing unit 21 to the SIT packet replacing unit 176.

The output switching circuit 20 includes a transport stream 19 output from the PID filter 169.
Enter 5.

When the output switching in the output switching circuit 20 is for display, the output switching circuit 20
Displays the transport stream for display in the decoding unit 2
Output to 7. The transport stream for display is packets 130, 138 having the content of program A, which is filtered by referring to the information in the PMT.
It consists of

The decoding unit 27 decompresses the display transport stream output from the output switching circuit 20, and outputs the decompressed transport stream to the display 4.

The display 4 receives the signal output from the decoding unit 27, and reproduces the video and audio which form the program A.

When the output switching in the output switching circuit 20 is for recording, the output switching circuit 20
Outputs the transport stream 195 to the SIT packet replacer 176.

As already explained, the NIT PID
The storage unit 23 stores the PID of the NIT packet 134. Therefore, the NIT PID storage unit 23 stores N
The IT packet 134 can be pointed to the SIT packet replacer 176.

The SIT packet replacer 176 receives the transport stream 195 output from the output switching circuit 20. The SIT packet replacer 176 is
The NIT packet 134 pointed out by the NIT PID storage unit 23 is output from the SIT storage unit 25 as an SI.
It is replaced by the T packet 141.

In this way, the SIT packet replacer 126 makes the NIT packet 1 based on the SIT packet 141.
34 is replaced and a signal is output to the packet modification unit 29.

The packet modifying unit 29 modifies the PAT packet 132 into the modified PAT packet 140 by inputting the signal output from the SIT packet replacing unit 176 and selecting only the specification information that correctly represents the transport stream 195. And modify the PMT packet 137 PMT
The packet 143 is modified. Also, the packet modification unit 29
Discards the SDT packet 136 and the EIT packet 133.

In this way, the packet modification unit 29
Generate a transport stream 196 for recording,
This is output to the recording device 5.

The recording device 5 inputs the transport stream 196 output from the packet modifying unit 29,
Record this.

[0059]

By the way, the transmission frequency of the NIT packet may be only once in 10 seconds depending on the broadcasting medium. This transmission frequency is SI
Replace that can be replaced with T packet
The packet transmission frequency is insufficient.

In the above, the NIT packet that can be replaced by the SIT packet 142 does not exist in the transport stream 195. Therefore, it is impossible to feed the SIT packet 142 into the recording transport stream 196. Therefore, the SIT packet 142 is discarded.

The present invention takes the above problems into consideration and considers the SI
Replace that can be replaced with T packet
Receiving system that can secure packets securely, microcomputer,
An object is to provide an LSI circuit, a digital broadcasting system, a receiving method, a program, and a medium.

[0062]

[Means for Solving the Problems] The first invention (Claim 1)
(Corresponding to), the content of the compressed and encoded program is multiplexed with the electronic program guide information having the program specification information having at least NIT, PAT, PMT, and the service information having at least SDT, EIT, and transport. A receiving unit that receives a transport stream transmitted from a transmission system that generates and transmits a stream, and a PID of a packet other than the NIT packet in the electronic program guide information, the PID of the replace packet (hereinafter, replace). PID designation part that can be designated as PID), and the replacement PI
A replace PID storage unit for storing D, a SIT generation processing unit for generating a SIT packet from the service information in the received transport stream, a replace packet instructed by the replace PID storage unit, and A reception system comprising a packet extraction / substitution unit capable of replacing the NIT packet with the SIT packet.

According to a second aspect of the present invention (corresponding to claim 2), the transmission system generates a dummy packet for replacement and uses the dummy packet for the transport packet.
The receiving system according to the first aspect of the present invention is characterized in that the PID designating unit is inserted into a stream and the PID of the dummy packet (hereinafter referred to as a dummy PID) is designated as the replace PID.

In a third aspect of the present invention (corresponding to claim 3), the transmission system generates frequency information of the SIT packet, adds the frequency information of the SIT packet to the electronic program guide information, and transmits the electronic program guide information. , The PID designation unit is the S
The replacement P is performed by referring to the frequency information of the IT packet.
The receiving system according to claim 1, wherein an ID is designated.

According to a fourth aspect of the present invention (corresponding to claim 4), the designated replace PID is a PID of a packet having contents of an unrecorded program (hereinafter referred to as an unrecorded PID).
All or a part thereof, or EIT PID, or SDT PID,
It has an ID filter and a SIT packet replacer, and the PI
The D filter is the receiving system according to the third aspect of the present invention, which is capable of extracting a packet having the content of the non-recorded program having the designated replace PID.

In a fifth aspect of the present invention (corresponding to claim 5), the PID designating section is a PID of a packet having contents of an unrecorded program (hereinafter referred to as an unrecorded PID) or an EIT.
The PID is designated, and the packet extraction / substitution unit refers to the given frequency information of the SIT packet to replace the replace packet with the designated replace PI.
The receiving system according to the first aspect of the present invention is characterized in that a packet having D is selected and actually replaced by the SIT packet.

A sixth aspect of the present invention (corresponding to claim 6) is that the content of a compressed and encoded program and at least NIT,
A transmission system that multiplexes program specification information having PAT and PMT and electronic program guide information having service information having at least SDT and EIT to generate and transmit a transport stream, and a transmission system transmitted from the transmission system. And a NI in the electronic program guide information.
A PID designating unit capable of designating a PID of a packet other than a T packet as a PID of a replace packet (hereinafter referred to as a replace PID), a replace PID storage unit storing the replace PID, and the received transport packet. The SIT generation processing unit that generates the SIT packet from the service information in the stream, the replace packet instructed by the replace PID storage unit, and the NIT packet
A digital broadcasting system, comprising: a receiving system having a packet extracting and replacing unit that can be replaced by a packet.

A seventh aspect of the present invention (corresponding to claim 7) is a program for causing a computer to execute all or part of the functions of all or part of the first to sixth aspects of the present invention. Is a program recording medium characterized by recording. The eighth invention (corresponding to claim 8) is at least
(1) The content of the compressed and encoded program, and (2) the electronic program guide information having at least the program specification information having NIT, PAT, PMT, and the service information having at least SDT, EIT are multiplexed and transported. Receiving means for receiving a transport stream transmitted from a transmitting system for generating and transmitting a stream, and PID of a predetermined type packet in the received transport stream
Is selectively designated as the PID of the replace packet, a replace PID storing means for storing the PID of the selectively designated replace packet, and a replace packet storing the PID. And a packet replacing means capable of replacing all or part of the packet with a packet that has been previously generated and processed. The ninth invention (corresponding to claim 9) is at least
(1) The content of the compressed and encoded program, and (2) the electronic program guide information having at least the program specification information having NIT, PAT, PMT, and the service information having at least SDT, EIT are multiplexed and transported. A PID designating unit capable of selectively designating a PID of a packet of a predetermined type in a transport stream transmitted and received from a transmission system for generating and transmitting a stream as a PID of a replace packet, The PID of the selectively designated replace packet is stored, and all or part of the replace packet in which the PID is stored is a microcomputer that is replaced with a packet that has been previously generated. The tenth invention (corresponding to claim 10) is at least
(1) The content of the compressed and encoded program, and (2) the electronic program guide information having at least the program specification information having NIT, PAT, PMT, and the service information having at least SDT, EIT are multiplexed and transported. PID of a replace packet selectively designated from PIDs of a predetermined type of packets in a transport stream transmitted and received from a transmission system that generates and transmits a stream
Is an LSI circuit provided with a packet replacing means capable of replacing all or part of the replace packet in which the PID is stored with a packet which has been previously generated. The eleventh invention (corresponding to claim 11) is at least:
(1) The content of the compressed and encoded program, and (2) the electronic program guide information having at least the program specification information having NIT, PAT, PMT, and the service information having at least SDT, EIT are multiplexed and transported. A transmission system for generating and transmitting a stream, receiving means for receiving the transmitted transport stream, and P of a predetermined type of packet in the received transport stream
A PID designating unit capable of selectively designating an ID as a PID of a replace packet, a replace PID storing unit storing the PID of the selectively designated replace packet, and a replace unit storing the PID. A digital broadcasting system provided with a receiving system including a packet replacing unit capable of replacing all or part of a packet with a packet that has been previously generated and processed. The twelfth aspect of the present invention (corresponding to claim 12) is at least
(1) The content of the compressed and encoded program, and (2) the electronic program guide information having at least the program specification information having NIT, PAT, PMT, and the service information having at least SDT, EIT are multiplexed and transported. A receiving step of receiving a transport stream transmitted from a transmission system which generates and transmits a stream, and P of a predetermined type packet in the received transport stream
PID designating step of selectively designating an ID as the PID of the replace packet, and replace P storing the PID of the selectively designated replace packet
The receiving method comprises an ID storing step and a packet replacing step of replacing all or part of the replace packet in which the PID is stored with a packet that has been previously generated. A thirteenth invention (corresponding to claim 13) includes all or a part of the receiving means, the PID designating means, the replace PID storing means, and the packet replacing means of the receiving system of the eighth invention. It is a program to be executed by a computer. The fourteenth invention (corresponding to claim 14) is a medium carrying the program of the thirteenth invention, which can be processed by a computer. A fifteenth invention (corresponding to claim 15) is a program for causing a computer to execute the PID designating means of the microcomputer of the ninth invention. The sixteenth invention (corresponding to claim 16) is a medium carrying the program according to the fifteenth invention, which can be processed by a computer. A seventeenth invention (corresponding to claim 17) is a program for causing a computer to execute the packet replacing means of the LSI circuit according to the tenth invention. The eighteenth invention (corresponding to claim 18) is a medium carrying the program according to the seventeenth invention, which can be processed by a computer.

[0069]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. (Embodiment 1) First, the configuration of the digital broadcasting system in Embodiment 1 will be described with reference to FIG. However, FIG. 1 is a configuration diagram of the digital broadcasting system 1 according to the first embodiment.

The digital broadcasting system 1 includes a transmission system 2 for generating and transmitting a transport stream,
Receiving system 3 for receiving a transport stream and outputting it to a display 4 or a recording device 5.
It has and. In addition, satellite repeater (transponder)
Reference numeral 6 is a device that relays radio waves and is mounted on the communication satellite 7.

Next, the configuration of the transmission system 2 according to the first embodiment will be described in detail with reference to FIG. However, FIG. 2 is a configuration diagram of the transmission system 2 according to the first embodiment.

The transmission system 2 is a system having a program selection related data generator 9, a packet multiplexer 10, and the like.

The encoding section 8 is a section having an MPEG2 video encoder for performing digital video compression encoding and an MPEG2 audio encoder for performing digital audio compression encoding. That is, the encoding unit 8 is a unit that generates a packet stream including packets having program contents and outputs the packet stream to the packet multiplexing unit 10.

The program selection related data generator 9 generates a packet stream including a packet having program specification information, a packet having service information, and a dummy packet for each program, and outputs the packet stream to the packet multiplexer 10. It is a part. In addition, P of the dummy packet for each program
A packet having data for notifying the reception system 3 of the ID in advance is also generated by the program selection related data generation unit 9 and output to the packet multiplexing unit 10. Note that the PID of each program dummy packet is also designated by the PMT, similarly to the PID of the data that constitutes the program. In this way, the program selection related data generation unit 9 generates a packet stream including packets having the content of the program selection related data, and the packet multiplexing unit 10
Is the part to be output to.

The packet multiplexing unit 10 outputs a packet stream consisting of packets having the content of a program output from the encoding unit 8 and a program selection related data generating unit 9
And a packet stream composed of packets having the content of the program selection related data, which is output from the device, is time-division-multiplexed into one transport stream.

The transmission path coding unit 11 is a unit that adds an error correction code to the transport stream output from the packet multiplexing unit 10, and further performs interleave processing and synchronization signal addition.

The modulation section 12 is a section for modulating the transport stream output from the transmission path coding section 11 and transmitting the radio wave 47 from the antenna.

Next, the configuration of the receiving system 3 according to the first embodiment will be described in detail with reference to FIG. However, FIG. 3 is a configuration diagram of the reception system 3 according to the first embodiment.

The receiving system 3 includes a packet demultiplexing unit 1
6, a system having a stream transmission processing unit 22 and the like.

The receiving section 13 is a section for receiving the radio wave 48 transmitted from the satellite repeater 6 (shown in FIG. 1).

The demodulation section 14 is a section having a detection circuit for demodulating the radio wave 48.

The transmission line decoding unit 15 includes a transmission line encoding unit 11
In this section, the transport stream subjected to the interleaving process is restored to the original transport stream, and error correction is performed on the restored transport stream.

The packet demultiplexing unit 16 is a unit having a PID filter 19 and the like.

The PID designating section 28 is a dummy program for recorded programs.
A PID of a packet (hereinafter, also referred to as a recorded program dummy PID) can be designated in the first replace PID storage unit 17 and the second replace PID storage unit 24. However, as will be described later, the recorded program is a program selected by an instruction from the outside.

The first replace PID storage unit 17 stores P
A signal is input from the ID designating unit 28 and the dummy P for recorded programs is input.
A device that stores an ID. The first replace P
Dummy PI for recorded programs stored in the ID storage unit 17
D is the same as the recorded program dummy PID stored in the second replace PID storage unit 24.

The recording PID storage unit 18 includes a PID designating unit 2
It is a device that inputs a signal from 8 and stores the PID of a packet having the content of a recorded program.

The PID filter 19 includes the transmission path decoding unit 15
From the transport stream output from the packet having the content of the recorded program pointed out by the recording PID storage 18, the first replacement PID storage 1
7 is a device for extracting a dummy packet for recorded programs, a packet having program specification information, and a packet having service information pointed out by 7. However, the PID filter 169 has a function of passing a packet having program specification information and a packet having service information as they are.

The output switching circuit 20 is a circuit for switching the display / recording output of the transport stream output from the PID filter 19.

The SIT generation processing section 21 is a section for generating an SIT packet from the SDT and EIT output from the PID filter 19.

The stream transmission processing section 22 is a section having a SIT packet replacing unit 26 and the like.

The NIT PID storage unit 23 is a device which receives a signal from the PID designating unit 28 and stores the NITPID.

The second replace PID storage unit 24 stores P
A signal is input from the ID designating unit 28 and the dummy P for recorded programs is input.
A device that stores an ID. The second replace P
Dummy PI for recorded programs stored in the ID storage 24
D is the same as the recorded program dummy PID stored in the first replace PID storage unit 17.

The SIT storage unit 25 includes the SIT generation processing unit 2
It is a device that stores the SIT packet that is generated and processed by 1.

The SIT packet replacer 26 uses the NIT P
The NIT packet pointed out by the ID storage unit 23 and the recorded program dummy packet pointed out by the second replacement PID storage unit 24 are stored in the SIT storage unit 25.
It is a device that can be replaced with a SIT packet output from the device.

The packet modification unit 29 is a unit that can receive the signal output from the SIT packet replacing unit 26, modify the packet, and create a transport stream for recording. The generated transport stream is output to the recording device 5.

The decoding section 27 decompresses the compression-coded video signal input from the output switching circuit 20.
PEG2 video decoder and output switching circuit 2
It is a part having an MPEG2 audio decoder for expanding a compression-coded audio signal input from 0. That is, the decoding unit 27 is a unit that decompresses the transport stream for display having the content of the compressed and encoded program and outputs the decompressed transport stream to the display 4.

The first embodiment having such a configuration
About the operation of the digital broadcasting system 1 in FIG.
It will be explained with reference also to. However, in FIG. 4, from the broadcast transport stream 44, through the transport stream 45 processed in the packet demultiplexing unit 16, the transport stream 4 for recording is recorded.
6 is a conceptual diagram illustrating a process in which 6 is generated. FIG.

Here, the operation of the transmission system 2 according to the first embodiment will be described in detail with reference to FIGS. 2 and 4.

The encoding unit 8 generates a packet stream consisting of packets 30 and 38 having the contents of the program A and a packet stream consisting of packets 31 having the contents of the program B, and these are generated by the packet multiplexing unit. Output to 10.

The program selection related data generating section 9 uses the PAT packet 32, the PMT packet 37, and the NIT packet 3
4, SDT packet 36, EIT packet 33, program A
Dummy packet 39 for program B, dummy packet 3 for program B
A packet stream composed of 5 is generated, and these are output to the packet multiplexing unit 10.

The packet multiplexing unit 10 multiplexes the packet stream output from the encoding unit 8 and the packet stream output from the program selection related data generating unit 9 to generate the transport stream 44.
Is generated and is output to the transmission path coding unit 11.

The transmission path coding unit 11 performs error correction code addition, interleave processing, and synchronization signal addition on the transport stream 44 output from the packet multiplexing unit 10, and outputs this to the modulation unit 12.

The modulation section 12 modulates the transport stream output from the transmission path coding section 11 by four-phase phase shift keying, and transmits a radio wave 47 from the antenna.

The satellite repeater 6 (shown in FIG. 1) is
Radio 47 (shown in FIG. 1) is received and radio 48
(As shown in FIG. 1).

Next, the operation of the receiving system 3 according to the first embodiment will be described in detail with reference to FIGS. 3 and 4.

The receiving system 3 starts the receiving operation by selecting the program A as the recorded program in the first embodiment according to an instruction from the outside. That is, the receiving system 3 receives the radio wave 48 from the satellite repeater 6,
The PMT is detected by referring to the information in the PAT in the transport stream. The PID designating unit 28 recognizes the PID of the dummy packet 39 for recorded program, and the first replace PID storage unit 17 and the second replace PI
The signal is output to the D storage device 24. The PID designating unit 28 also outputs signals to the recording PID storage unit 18 and the NIT PID storage unit 23.

The recording PID storage unit 18 has a PID designating unit 2
The signal is input from S8 and the PIDs of the packets 30 and 38 having the content of the program A are stored. Further, the first replace PID storage unit 17 receives a signal from the PID designating unit 28 and stores the PID of the dummy packet 39 for the program A. Further, the NIT PID storage unit 23 receives the signal from the PID designating unit 28 and receives the PID of the NIT packet 34.
To store. In addition, the second replace PID storage unit 24
Receives a signal from the PID designating unit 28 and stores the PID of the dummy packet 39 for program A.

The receiver 13 receives the radio wave 48 and outputs it to the demodulator 14.

The demodulation section 14 outputs the transport stream obtained by demodulating the radio wave 48 received by the reception section 13 to the transmission path decoding section 15.

The transmission path decoding unit 15 performs error correction on the transport stream output from the demodulation unit 14,
Restore the transport stream 44 and call it P
It is output to the ID filter 19.

As already explained, the recording PID storage unit 18 stores the packets 30, 3 having the contents of the program A.
It stores 8 PIDs. Also, the first replacement P
The ID storage unit 17 stores the P of the dummy packet 39 for the program A.
The ID is stored as the replace PID.

Therefore, the recording PID storage 18 stores the packets 30, 38 having the content of the program A in the PID.
It is possible to point to the filter 19. Further, the first replace PID storage unit 17 can point out the dummy packet 39 for program A to the PID filter 19.

The PID filter 19 includes a transmission line decoding unit 15
From the transport stream 44 output from
Packets 30, 38 with the content of program A pointed out by the recording PID store 18, the first replace P
The dummy packet 39 for program A indicated by the ID storage unit 17 is extracted. In addition, the PID filter 19
From the transport stream 44 output from the transmission path decoding unit 15, the PAT packet 32, the PMT packet 37, the NIT packet 34, the SDT packet 36, and the EI.
The T packet 33 is extracted.

In this way, the PID filter 19
The SDT and EIT are output to the SIT generation processing unit 21. Further, the PID filter 19 includes packets 30, 38 having the contents of the program A, dummy packets 39 for the program A,
The transport stream 45 including the PAT packet 32, the PMT packet 37, the NIT packet 34, the SDT packet 36, and the EIT packet 33 is output to the output switching circuit 20.

The SIT generation processing unit 21 inputs the SDT and EIT output from the PID filter 19, generates SIT packets 41 and 43, and outputs them to the SIT storage unit 25. The SIT storage unit 25 stores the SIT packets 41 and 43 output from the SIT generation processing unit 21,
Output to the SIT packet replacer 26.

The output switching circuit 20 receives the transport stream 45 output from the PID filter 19.

When the output switching in the output switching circuit 20 is for display, the output switching circuit 20
Displays the transport stream for display in the decoding unit 2
Output to 7.

The decoding section 27 decompresses the display transport stream output from the output switching circuit 20, and outputs the decompressed transport stream to the display 4.

The display 4 receives the signal output from the decoding section 27 and displays the video and audio constituting the program A.

When the output switching in the output switching circuit 20 is for recording, the output switching circuit 20
Outputs the transport stream 45 to the SIT packet replacer 26.

As already explained, the NIT PID
The storage device 23 stores the PID of the NIT packet 34. Further, the second replace PID storage unit 24 stores the PID of the dummy packet 39 for the program A.

Therefore, the NIT PID storage unit 23
Replaces the NIT packet 34 with the SIT packet replacer 26.
It is possible to point out. Further, the second replace PID storage unit 24 uses the dummy packet 39 for the program A.
Can be pointed to the SIT packet replacer 26.

The SIT packet replacer 26 receives the transport stream 45 output from the output switching circuit 20. The SIT packet replacer 26 uses the NIT
The NIT packet 34 pointed out by the PID storage unit 23 is replaced by the SIT packet 41 output from the SIT storage unit 25. Further, the SIT packet replacer 26 replaces the dummy packet 39 for the program A pointed out by the second replace PID storage 24 with SI.
It is replaced by the SIT packet 43 output from the T storage device 25.

In this way, the SIT packet replacer 26 replaces the NIT packet 34 with the SIT packet 41 and replaces the dummy packet 39 for the program A with the SIT packet 42, and outputs a signal to the packet modification unit 29. To do.

The packet modification unit 29 receives the signal output from the SIT packet replacer 26 and selects only the specification information that correctly represents the transport stream 45, thereby modifying the PAT packet 32.
Change PMT packet 37 to 0 and modify PMT packet 37
Change to 2. Further, the packet modification unit 29 discards the SDT packet 36 and the EIT packet 33. The packet modification unit 29 thus creates the recording transport stream 46 and outputs it to the recording device 5.

The recording device 5 inputs the transport stream 46 output from the packet modification unit 29 and records it.

The PID of each program dummy packet in the present invention does not have to be designated by the PMT as in the above-described first embodiment, and can be stored as a descriptor in the descriptor area of the SDT or EIT. It may be described.

As described above, by transmitting each program dummy packet that can be replaced by the SIT packet from the transmission system, the problem that the NIT packet transmission frequency as the replacement packet is insufficient is solved. ing.

(Second Embodiment) First, the configuration of the digital broadcasting system according to the second embodiment will be described with reference to FIG. However, FIG. 5 is a configuration diagram of the digital broadcasting system 51 according to the second embodiment.

The digital broadcasting system 51 is a transmission system 52 for generating and transmitting a transport stream.
And a receiving system 53 for receiving the transport stream and outputting it to the display 4 or the recording device 5.

Next, the configuration of the transmission system 52 according to the second embodiment will be described.

The transmission system 52 is a system having a program selection related data generator 59, a packet multiplexer 10, and the like.

The program selection related data generator 59 generates a packet stream including a packet having program specification information and a packet having service information,
This is a part to be output to the packet multiplexing unit 10. Also, S
A packet having SIT recording frequency data indicating an appropriate recording frequency of IT is also generated by the program selection related data generating unit 59 and output to the packet multiplexing unit 10. The SIT recording frequency data that indicates the appropriate recording frequency of the SIT is described as a descriptor in the descriptor area of the SDT or EIT.

Next, the configuration of the receiving system 53 in the second embodiment will be described.

The reception system 53 is a system having a packet demultiplexing unit 66, a stream transmission processing unit 72 and the like.

The packet demultiplexing unit 66 is a unit having a PID filter 69 and the like.

The PID designating section 78 refers to the SIT recording frequency data output from the program selection related data generating section 59 for the PID of the packet having the content of the non-recording program (hereinafter also referred to as non-recording PID), One Replace P
It is a device that can be designated as the ID storage device 67 and the second replacement PID storage device 74.

The first replace PID storage unit 67 stores P
It is a device that receives a signal from the ID designating section 78 and stores a non-recorded PID. The non-recorded PID stored in the first replace PID storage 67 is the same as the non-record PID stored in the second replace PID storage 74.

The PID filter 69 has a transmission line decoding section 15
From the transport stream output from the packet having the content of the recorded program pointed out by the recording PID storage 18, the first replacement PID storage 6
7 is a device for extracting the packet having the content of the non-recorded program pointed out by 7, the packet having the program specification information, and the packet having the service information.

The stream transmission processing section 72 is a section having a SIT packet replacing unit 76 and the like.

The second replace PID storage unit 74 stores P
It is a device that receives a signal from the ID designating section 78 and stores a non-recorded PID. The non-recorded PID stored in the second replace PID storage device 74 is the same as the non-record PID stored in the first replace PID storage device 67.

The SIT packet replacer 76 uses the NIT P
The NIT packet pointed out by the ID storage unit 23 and the packet having the content of the non-recorded program pointed out by the second replacement PID storage unit 74 are SIT
It is a device that can be replaced by the SIT packet output from the storage device 25.

The second embodiment having such a configuration
The operation of the digital broadcasting system 51 will be described with reference to FIG. However, FIG. 6 is a concept for explaining a process of generating a recording transport stream 96 from a broadcast transport stream 94 through a transport stream 95 processed in the packet demultiplexing unit 66. It is a figure.

Here, the operation of transmitting system 52 in the second embodiment will be described in detail.

The encoding unit 8 includes a packet stream composed of packets 80 and 88 having the contents of the program A, and packets 81, 85 and 8 having the contents of the program B.
A packet stream consisting of 9 is generated, and these are output to the packet multiplexing unit 10.

The program selection related data generating section 59 uses the PAT.
Packet 82, PMT packet 87, NIT packet 8
4, a packet stream composed of SDT packet 86 and EIT packet 83 is generated, and these are output to the packet multiplexer 10.

The packet multiplexing unit 10 multiplexes the packet stream output from the encoding unit 8 and the packet stream output from the program selection related data generating unit 59, and thereby the transport stream 9
4 is generated and is output to the transmission path encoding unit 11.

The transmission path coding section 11 performs error correction code addition, interleave processing, and synchronization signal addition on the transport stream output from the packet multiplexing section 10, and outputs this to the modulation section 12.

The modulation section 12 modulates the transport stream output from the transmission path coding section 11 to generate the radio wave 9
Send 7.

The satellite repeater 6 receives the radio wave 97 and transmits the radio wave 98.

Next, the operation of the receiving system 53 in the second embodiment will be described in detail.

The receiving system 53 starts the receiving operation by selecting the program A as the recorded program in the second embodiment according to an instruction from the outside. That is, the reception system 53 receives the radio wave 98 from the satellite repeater 6 and refers to the information in the PAT in the transport stream to detect the PMT. PID designation unit 78
Is the SI output from the program selection related data generation unit 59.
Program B, which is a non-recorded program, with reference to T recording frequency data
The PID of the packet 85 having the content of is properly recognized, and a signal is output to the first replacement PID storage unit 17 and the second replacement PID storage unit 24. In addition, PI
The D designating section 78 includes a recording PID storage unit 18, NIT PI
It also outputs a signal to the D storage device 23.

The recording PID storage unit 18 includes a PID designating unit 7
The signal is input from S8 and the PIDs of the packets 80 and 88 having the content of the program A are stored. Further, the first replace PID storage unit 67 inputs a signal from the PID designating unit 78 and appropriately stores the PID of the packet 85 having the content of the program B which is a non-recorded program. Also, NITP
The ID storage unit 23 receives the signal from the PID designating unit 78 and stores the PID of the NIT packet 84. In addition, the second replace PID storage unit 74 includes a PID designating unit 78.
Signal is input to properly store the PID of the packet 85 having the content of the program B.

The PID designating section 78 does not designate the PIDs of the packets 81 and 89 having the content of the program B as the replace PID by referring to the SIT recording frequency data. Therefore, the PIDs of the packets 81 and 89 having the content of the program B are not stored in the first replace PID storage 67. Further, the PIDs of the packets 81 and 89 having the content of the program B are the second replacement PI.
It is not stored in the D storage device 74.

The receiver 13 receives the radio wave 98 and outputs it to the demodulator 14.

The demodulation section 14 outputs the transport stream obtained by demodulating the radio wave 98 received by the reception section 13 to the transmission path decoding section 15.

The transmission path decoding unit 15 performs error correction on the transport stream output from the demodulation unit 14,
Restore the transport stream 94 and set it to P
It is output to the ID filter 69.

As described above, the recording PID storage unit 18 stores the packets 80, 8 having the contents of the program A.
It stores 8 PIDs. Also, the first replacement P
The ID storage 67 appropriately stores the PID of the packet 85 having the content of the program B which is a non-recorded program as the replace PID (the PID of the packets 81 and 89 having the content of the program B is the replace PID. not specified).

Therefore, the recording PID storage 18 stores the packets 80 and 88 having the content of the program A in the PID.
It is possible to point to the filter 69. Further, the first replace PID storage unit 67 can point out the packet 85 having the content of the program B to the PID filter 69.

The PID filter 69 has a transmission line decoding unit 65.
From the transport stream 94 output from
Packets 80, 88 with the content of program A pointed out by the recording PID store 18, first replacement P
The packet 85 having the content of the program B pointed out by the ID storage 67 is extracted. Further, the PID filter 69 receives the PAT packet 82, the PMT from the transport stream 94 output from the transmission path decoding unit 15.
Packet 87, NIT packet 84, SDT packet 8
6. Extract the EIT packet 83.

In this way, the PID filter 69
The SDT and EIT are output to the SIT generation processing unit 71. The PID filter 69 also includes packets 80 and 88 having the contents of the program A, packets 85 having the contents of the program B, PAT packets 82, PMT packets 87 and N.
Transport stream 95 including IT packet 84, SDT packet 86, and EIT packet 83
Is output to the output switching circuit 20.

The SIT generation processing unit 21 inputs the SDT and EIT output from the PID filter 69, generates the SIT packets 91 and 92, and outputs them to the SIT storage unit 75. The SIT storage unit 25 stores the SIT packets 91 and 92 output from the SIT generation processing unit 21,
It is output to the SIT packet replacing unit 76.

The output switching circuit 20 receives the transport stream 95 output from the PID filter 69.

When the output switching in the output switching circuit 20 is for display, the output switching circuit 20
Displays the transport stream for display in the decoding unit 2
Output to 7. The decoding unit 27 uses the output switching circuit 20.
The transport stream for display output from is expanded and the signal is output to the playback device 4.

The reproducing apparatus 4 receives the signal output from the decoding section 27 and reproduces the video and audio composing the program A.

When the output switching in the output switching circuit 20 is for recording, the output switching circuit 70
Outputs the transport stream 95 to the SIT packet replacer 76.

As already explained, the NIT PID
The storage unit 23 stores the PID of the NIT packet 84. In addition, the second replace PID storage unit 74 stores the PID of the packet 85 having the content of the program B appropriately.

The SIT packet replacer 76 receives the transport stream 95 output from the output switching circuit 20. The SIT packet replacer 76 uses the NIT
The NIT packet 84 pointed out by the PID storage unit 23 is replaced by the SIT packet 91 output from the SIT storage unit 25. Further, the SIT packet replacer 76 has a packet 85 having the content of the program B pointed out by the second replace PID storage 74.
SIT packet 9 output from the SIT storage device 25
Replace by 2.

The SIT packet replacer 76 thus replaces the NIT packet 84 by the SIT packet 91 and the packet 85 having the contents of the program B by the SIT packet 92, and sends the signal to the packet modification unit 29. Output.

The packet modification unit 29 receives the signal output from the SIT packet replacing unit 76, modifies the PAT packet 82 into the modified PAT packet 90, and modifies the PMT packet 87 into the modified PMT packet 93. Also, the packet modification unit 29 discards the SDT packet 86 and the EIT packet 83. The packet modification unit 29 thus generates the recording transport stream 96 and outputs it to the recording device 5.

The recording device 5 inputs the transport stream 96 output from the packet modification unit 29 and records it.

The replace PID in the present invention
Is the non-record PI as in the second embodiment described above.
SDT PI does not have to be all or part of D
It may be D or EIT PID.

As described above, by transmitting the SIT recording frequency data indicating the appropriate recording frequency of the SIT and using the packet having the content of the non-recorded program as the replace packet which can be replaced by the SIT packet. The problem that the transmission frequency of the NIT packet as the replace packet is insufficient is solved.

(Third Embodiment) First, the configuration of the digital broadcasting system according to the third embodiment will be described with reference to FIG. However, FIG. 7 is a configuration diagram of the digital broadcasting system 101 according to the third embodiment.

The digital broadcasting system 101 is a transmission system 1 for generating and transmitting a transport stream.
02, and a receiving system 103 for receiving the transport stream and outputting it to the display 4 or the recording device 5.

Transmission system 10 according to the third embodiment
2 is the same as the transmission system in the prior art.

Therefore, the configuration of the receiving system 103 according to the third embodiment will be described with reference to FIG.

The reception system 103 is a system having a packet demultiplexing unit 116, a stream transmission processing unit 122 and the like.

The packet demultiplexing unit 116 is a unit having a PID filter 119 and the like.

The PID designating unit 128 sets the PID of the packet having the content of the non-recorded program (hereinafter also referred to as non-recorded PID) and the EIT PID (that is, the PID of the EIT packet) to the first replace PID storage unit 11.
7 and the second replaceable PID storage unit 124.

The first replace PID storage unit 117 is
A signal is input from the PID designating unit 128 and a non-recorded PID,
And a device for storing the EIT PID. The non-recorded PID and EITPID stored in the first replace PID storage unit 117 are the same as the non-recorded PID and EIT PID stored in the second replace PID storage unit 124.

The PID filter 119 is used by the transmission path decoding unit 1
5, from the transport stream output from No. 5, the packet having the content of the recorded program pointed out by the recording PID storage unit 18, the packet having the content of the non-recorded program pointed out by the first replacement PID storage unit 117, The EIT packet pointed out by the one replace PID storage unit 117, the packet having the program specification information, and the packet having the service information,
These are the devices to be extracted.

The stream transmission processing section 122 is a section having a SIT packet replacing unit 126 and the like.

The second replace PID storage unit 124 is
A signal is input from the PID designating unit 128 and a non-recorded PID,
And a device for storing the EIT PID. The unrecorded PID and EITPID stored in the second replace PID storage unit 124 are the same as the unrecorded PID and EIT PID stored in the first replace PID storage unit 117.

The SIT packet replacer 126 uses the NIT
A NIT packet pointed out by the PID store 23,
A packet with the content of the unrecorded program pointed to by the second replace PID store 124, and an E pointed by the second replace PID store 124.
SI packets output from the SIT storage unit 25
It is a device that can be replaced with T packets.

The packet modification section 129 is a section which receives the signal output from the SIT packet replacing unit 126 and modifies the packet to create a transport stream for recording.

The third embodiment having such a configuration
Regarding the operation of the digital broadcasting system 101 in
Description will be made with reference to FIG. However, FIG. 8 shows that the transport stream 144 that has been processed by the packet demultiplexing unit 116 from the broadcast transport stream 144 is processed.
FIG. 9 is a conceptual diagram illustrating a process in which a recording transport stream 146 is generated via a stream 145.

Transmission system 10 according to the third embodiment
The operation of No. 2 is the same as the operation of the transmission system in the related art.

Therefore, the operation of the receiving system 103 according to the third embodiment will be described in detail.

The receiving system 103 starts the receiving operation by selecting the program A as the recorded program in the third embodiment according to an instruction from the outside. That is,
The receiving system 103 receives the radio wave 148 from the satellite repeater 6 and refers to the information in the PAT in the transport stream to detect the PMT. PID designation section 1
28 recognizes the PIDs of the packets 131, 135, 139 and EIT packet 133 having the content of the program B which is a non-recorded program, and stores them in the first replace PID storage 117 and the second replace PID storage 124. Signal output. In addition, the PID designation unit 128 uses the recording PI.
It also outputs signals to the D storage 18 and the NIT PID storage 23.

The recording PID storage unit 18 includes a PID designating unit 1
The signal is input from 28 and the PIDs of the packets 130 and 138 having the content of the program A are stored. Further, the first replace PID storage unit 117 includes a PID designating unit 128.
Signal is input, and the PIDs of the packets 131, 135, and 139 having the content of the program B and the PID of the EIT packet 133 are stored. Further, the NIT PID storage unit 23 receives the signal from the PID designating unit 128,
The PID of the IT packet 134 is stored. In addition, the second replace PID storage unit 124 receives the signal from the PID designating unit 28 and transmits the packet 1 having the content of the program B.
The PIDs of 31, 135, and 139 and the PID of the EIT packet 133 are stored.

The receiver 13 receives the radio wave 148 and outputs it to the demodulator 14.

The demodulation section 14 outputs the transport stream obtained by demodulating the radio wave 148 received by the reception section 13 to the transmission path decoding section 15.

The transmission path decoding unit 15 performs error correction on the transport stream output from the demodulation unit 14,
It restores the transport stream 144 and outputs it to the PID filter 119.

The PID filter 119 is used by the transmission line decoding unit 1.
5 from the transport stream 144 output from No. 5, packets 130, 138 with the content of program A pointed out by the recording PID store 18 and with the content of program B pointed out by the first replace PID store 117. P of packets 131, 135, 139
Extract the ID and the EIT packet 133 pointed out by the first replace PID store 117. Further, the PID filter 119 receives the PA from the transport stream 144 output from the transmission path decoding unit 15.
T packet 132, PMT packet 137, NIT packet 134, SDT packet 136, EIT packet 1
Extract 33.

In this way, the PID filter 119 outputs the SDT and EIT to the SIT generation processing section 21. Further, the PID filter 119 includes packets 130 and 138 having contents of the program A, packets 131, 135 and 139 having contents of the program B, PAT packets 132, PMT packets 137, and NIT packets 13.
4, the transport stream 145 composed of the SDT packet 136 and the EIT packet 133 is output to the output switching circuit 20.

The SIT generation processing section 21 inputs the SDT and EIT output from the PID filter 119, and
The packets 141 and 142 are generated and processed and SI
Output to the T storage device 25. The SIT storage device 25 is a SIT
The SIT packet 141 output from the generation processing unit 21,
142 is output to the SIT packet replacer 126.

The output switching circuit 20 includes the transport stream 14 output from the PID filter 119.
Enter 5.

When the output switching in the output switching circuit 20 is for display, the output switching circuit 20
Displays the transport stream for display in the decoding unit 2
Output to 7.

The decoding section 27 decompresses the display transport stream output from the output switching circuit 20, and outputs the decompressed transport stream to the display 4.

The display 4 receives the signal output from the decoding section 27 and displays the video and audio constituting the program A.

When output switching in the output switching circuit 20 is for recording, the output switching circuit 20
Outputs the transport stream 145 to the SIT packet replacer 126.

The SIT packet replacer 126 receives the transport stream 145 output from the output switching circuit 20. The SIT packet replacer 126
NIT packet 134, packets 131, 135, 139 having contents of program B, EIT packet 133
Is determined by the SIT packets 141 and 142.

That is, the SIT packet replacer 126
Is the NI pointed to by the NIT PID store 23
The T packet 134 is replaced by the SIT packet 141 output from the SIT storage device 25. Also,
The SIT packet replacer 126 uses the second replace PI.
EIT packet 13 pointed out by D store 124
3 is replaced by the SIT packet 142 output from the SIT storage unit 25. Then, the SIT packet replacer 126 does not replace the packets 131, 135, and 139 having the content of the program B by the SIT packet (as already described, the transmission frequency of the EIT packet is sufficient, so that it is not recorded. Packets with program content may not be used as replace packets).

In this way, the SIT packet replacing unit 126 makes the NIT packet 1 based on the SIT packet 142.
34 and the EIT packet 133 by the SIT packet 141 are replaced, and a signal is output to the packet modification unit 129.

The packet modification unit 129 inputs the signal output from the SIT packet replacer 126, modifies the PAT packet 132 into the modified PAT packet 140, and modifies the PMT.
The packet 137 is modified into a modified PMT packet 143.
Further, the packet modification unit 29 uses the SDT packet 136,
The EIT packet 133 and the packets 131, 135, 139 having the content of the program B are discarded. The packet modification unit 129 thus creates the recording transport stream 146 and outputs it to the recording device 5.

The recording device 5 inputs the transport stream 146 output from the packet modification unit 129 and records it.

The SIT packet replacer 126 according to the present invention, as in the third embodiment described above,
It is not necessary to replace the replacement packet properly selected from the packets having the specified replacement PID with the SIT packet, and only a predetermined ratio is selected from all the packets having the specified replacement PID. The replaced packet may be replaced with a SIT packet.

In this way, the SIT packet replacer is
By giving the ability to decide whether to actually replace the IT packet and using the packet having the content of the non-recorded program and the EIT packet as a replace packet that can be replaced by the SIT packet, N as a replace packet
The problem that the transmission frequency of IT packets is insufficient is solved.

In the above-described embodiment, PI
The member that combines the D filter and the SIT packet replacer is
This corresponds to the packet extraction / substitution unit described in [Claims].

The packet stream according to the present invention does not have to be composed of ten packets as in the above-mentioned embodiment, but may be composed of any number of packets.

Further, the program according to the present invention does not have to be broadcast by two as in the above-mentioned embodiment, but may be broadcast by an arbitrary number.

Further, the replace PID storage device according to the present invention does not need to be provided in two as in the above-described embodiment, but may be provided in one.

Further, the digital broadcasting in the present invention does not have to be the broadcasting using the communication satellite as in the above-mentioned embodiment, and may be the wired broadcasting using the optical fiber or the coaxial cable or the wireless broadcasting. Good.

Further, the digital broadcasting in the present invention does not have to be the broadcasting of the program as in the above-mentioned embodiment, but may be the broadcasting of personal computer games or karaoke.

[0216]

As is apparent from the above description, the present invention has an advantage that a replace packet that can be replaced with a SIT packet can be surely secured. More specifically, the first present invention corresponding to claim 1 can provide a receiving system characterized in that a replace packet that can be replaced by an SIT packet can be reliably secured.

The second aspect of the present invention corresponding to claim 2 can provide a receiving system characterized in that, in addition to the above effects, a replace packet for each program can be secured.

In addition to the above effects, the third present invention corresponding to claim 3 can provide a receiving system characterized in that a replace packet can be secured by an instruction of the transmitting system.

In addition to the above effects, the fourth present invention corresponding to claim 4 can provide a receiving system characterized in that a replace packet can be sufficiently secured by an instruction of the transmitting system.

In addition to the above effects, the fifth invention corresponding to claim 5 provides a receiving system characterized in that a replace packet can be secured by the judgment of the receiving system without involvement of the transmitting system. be able to.

A sixth aspect of the present invention corresponding to claim 6 can provide a digital broadcasting system characterized in that a replace packet for each program can be surely secured.

The seventh aspect of the present invention corresponding to claim 7 can provide a program recording medium characterized in that a replace packet for each program can be reliably secured.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a digital broadcasting system described in a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a transmission system described in the first embodiment of the present invention.

FIG. 3 is a configuration diagram of a reception system described in the first embodiment of the present invention.

FIG. 4 is a conceptual diagram illustrating a process of generating a recording transport stream described in the first embodiment of the present invention.

FIG. 5 is a configuration diagram of a digital broadcasting system described in a second embodiment of the present invention.

FIG. 6 is a conceptual diagram illustrating a process of generating a recording transport stream described in the second embodiment of the present invention.

FIG. 7 is a configuration diagram of a digital broadcasting system explained in a third embodiment of the present invention.

FIG. 8 is a conceptual diagram illustrating a process of generating a recording transport stream described in a third embodiment of the present invention.

FIG. 9 is a block diagram of a conventional digital broadcasting system.

FIG. 10: Transport for recording according to the prior art
It is a conceptual diagram explaining the process in which a stream is generated.

[Explanation of symbols]

1 Digital broadcasting system 2 Transmission system 3 receiving system 4 display 5 recording device 6 Satellite repeater (transponder) 7 communication satellites 8 Encoding section 9 Program selection related data generator 10 Packet multiplexer 11 Transmission line coding unit 12 Modulator 13 Receiver 14 Demodulator 15 Transmission line decoding unit 16 Packet demultiplexer 17 First Replace PID Storage 18 Record PID storage 19 PID filter 20 output switching circuit 21 SIT generation processing unit 22 Stream transmission processing unit 23 NIT PID storage 24 Second Replace PID Store 25 SIT storage 26 SIT packet replacer 27 Decoding section 28 PID designation section 29 Packet modifier 51 digital broadcasting system 52 transmission system 53 Receiving system 59 Program selection related data generator 66 packet demultiplexer 67 First Replace PID Store 69 PID filter 72 Stream transmission processing unit 74 Second Replace PID Store 76 SIT packet replacer 78 PID designation section 101 digital broadcasting system 102 transmission system 103 receiving system 109 Program selection related data generator 116 packet demultiplexer 117 First Replace PID Storage 119 PID filter 122 Stream Transmission Processing Unit 124 Second Replace PID Store 126 SIT packet replacer 128 PID designation section 129 packet modifier 151 digital broadcasting system 153 reception system 166 packet demultiplexer 169 PID filter 172 Stream transmission processing unit 176 SIT Packet Replacer

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Claims (18)

[Claims] 1. Content of a compressed and encoded program,
By multiplexing program specification information having at least NIT, PAT, PMT, and electronic program guide information having service information having at least SDT, EIT,
A receiving unit that receives a transport stream transmitted from a transmission system that generates and transmits a transport stream, and PIDs of packets other than NIT packets in the electronic program guide information, PID of the replace packet ( Hereinafter, referred to as a replace PID), a PID specifying unit, a replace PID storage unit for storing the replace PID, and a SIT generating process for generating a SIT packet from service information in the received transport stream. A processing unit and a replacement unit designated by the replacement PID storage unit.
A receiving system comprising: a packet; and a packet extraction / substitution unit that can replace the NIT packet with the SIT packet. 2. The transmission system generates a dummy packet for replacement, inserts the dummy packet into the transport stream, and the PID designating unit sets the PID of the dummy packet.
The receiving system according to claim 1, wherein (hereinafter referred to as a dummy PID) is designated as the replace PID. 3. The transmission system generates frequency information of the SIT packet, adds the frequency information of the SIT packet to the electronic program guide information, and transmits the electronic program guide information. The PID designating unit determines the frequency of the SIT packet. The receiving system according to claim 1, wherein the replacement PID is designated with reference to information. 4. The specified replace PID is all or part of a PID of a packet having content of an unrecorded program (hereinafter referred to as an unrecorded PID), or EIT.
PID or SDT PID, the packet extraction / substitution unit has a PID filter and a SIT packet substitution unit, and the PID filter extracts a packet having the content of the non-recorded program having the designated replacement PID. The receiving system according to claim 3, wherein the receiving system is capable of performing the following. 5. The PID designating unit designates a PID (hereinafter referred to as a non-recording PID) of a packet having the content of a non-recorded program, an EIT PID, or an SDTPID, and the packet extraction / substitution unit receives the supplied 2. The replacement packet is selected from the packets having the designated replacement PID by referring to the frequency information of the SIT packet, and the replacement packet is actually replaced by the SIT packet. Receiving system. 6. Content of a compressed and encoded program,
By multiplexing program specification information having at least NIT, PAT, PMT, and electronic program guide information having service information having at least SDT, EIT,
A transmitting system that generates and transmits a transport stream, a receiving unit that receives the transport stream transmitted from the transmitting system, and PIDs of packets other than NIT packets in the electronic program guide information are replaced. A PID designating unit that can be designated as a PID of a packet (hereinafter referred to as a replace PID), a replace PID storage unit that stores the replace PID, and a SIT packet from service information in the received transport stream. SIT to generate
A receiving system characterized by having a generation processing unit, a replacement packet designated by the replacement PID storage unit, and a packet extraction and replacement unit capable of replacing the NIT packet with the SIT packet. A digital broadcasting system characterized by that. 7. A program recording program for causing a computer to execute all or some of the functions of all or some of the means according to any one of claims 1 to 6. Medium. 8. At least (1) the content of a compressed and encoded program, and (2) at least NIT, PAT,
Receiving a transport stream transmitted from a transmission system that multiplexes program specification information having PMT and electronic program guide information having at least SDT and service information having EIT to generate and transmit a transport stream And a PID of the replace packet for the PID of a predetermined type packet in the received transport stream.
PID designating means capable of selectively designating as an ID, and PID of the selectively designated replacement packet
And a packet replacement unit capable of replacing all or part of the replace packet in which the PID is stored with a packet generated beforehand. 9. At least (1) the content of the compressed and encoded program, and (2) at least the NIT, PAT,
A transport transmitted and received from a transmission system that multiplexes program specification information having PMT and electronic program guide information having at least SDT and service information having EIT to generate and transmit a transport stream. Replace the PID of a given type of packet in the stream with the P of the replaced packet.
A PID designating unit capable of selectively designating as an ID is provided, and the PID of the selectively designated replacement packet is stored, and all or part of the replacement packet storing the PID is previously stored. A microcomputer that is replaced with a packet that has been generated and processed. 10. At least (1) the content of the compressed and encoded program, and (2) at least the NIT and PA.
T, PMT and program specification information and at least SDT, EIT and electronic program guide information having at least service information are multiplexed and transport
Of the PIDs of the predetermined type of packets in the transport stream transmitted and received from the transmission system that generates and transmits the stream, the PID of the replace packet that is selectively designated is stored and its PI
An LSI circuit provided with a packet replacing means capable of replacing all or part of a replace packet in which D is stored with a packet generated beforehand. 11. At least (1) compression-coded program content, and (2) at least NIT, PA.
T, PMT and program specification information and at least SDT, EIT and electronic program guide information having at least service information are multiplexed and transport
A transmission system that generates and transmits a stream, a receiving unit that receives the transmitted transport stream, and a PID of a predetermined type packet in the received transport stream is selected as a PID of a replace packet. PID designating means that can be designated, replace PID storing means that stores the PID of the selectively designated replace packet, and all or part of the replace packet that stores the PID in advance. And a receiving system having a packet replacing means capable of replacing with a processed packet. 12. At least (1) the content of the compressed and encoded program, and (2) at least the NIT and PA.
T, PMT and program specification information and at least SDT, EIT and electronic program guide information having at least service information are multiplexed and transport
A receiving step of receiving a transport stream transmitted from a transmission system for generating and transmitting a stream, and a PID of a packet of a predetermined type in the received transport stream,
PID designation step of selectively designating as an ID, and PID of the selectively designated replacement packet
And a packet replacing step of replacing all or part of the replace packet in which the PID is stored with a packet generated beforehand. 13. A program for causing a computer to execute all or a part of the receiving means, the PID designating means, the replace PID storing means, and the packet replacing means of the receiving system according to claim 8. 14. A medium carrying the program according to claim 13, which can be processed by a computer. 15. A program for causing a computer to execute the PID designating means of the microcomputer according to claim 9. 16. A medium carrying the program according to claim 15, which can be processed by a computer. 17. A program for causing a computer to execute the packet replacing means of the LSI circuit according to claim 10. 18. A medium carrying the program according to claim 17, which can be processed by a computer.