JPH1023069A - Transmitting device and transmitting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid overlapping of additional information by means of simple configuration and to execute multiplexing, without trouble by adding second additional information to first additional information and generating third additional information which is integrated into one, by means of regeneration. SOLUTION: A first transmitting device 21 encodes the video and voice controllers S1-S4 of respective programs by encoders 26-29, generates additional information such as PSI(program specific information) and SI(service information) by a controller unit 25, makes it into a packet and multiplexing respective transport streams S21-S25 by a multiplexer 30, so as to transmit video and voice data of the plural programs by one line. The first transmitting information 21 generates additional information in a lump such as PSI and SI by the controller unit 25, so that the overlapping of additional information is avoided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[Table of Contents] The present invention will be described in the following order. Technical field to which the invention pertains Conventional technology (FIGS. 17 and 18) Problems to be solved by the invention (FIGS. 19 and 20) Means for solving the problem Embodiments of the invention (FIGS. 1 to 16) effect

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission apparatus and a transmission method, and is suitably applied to, for example, a digital broadcasting system for digitizing and broadcasting video and audio.

[0003]

2. Description of the Related Art In recent years, various compression coding systems have been proposed to reduce the amount of information of video and accompanying audio. A typical example is the ISO (Internationa
l MPEG2 (Moving) standardized by organizations such as the Organization for Standardization
There is a compression coding method called Picture Experts Group Phase 2). The MPEG2 system is standardized for transmitting video and audio, and is standardized for video and audio, respectively.

[0004] In recent years, a digital broadcasting system has been devised which compresses and encodes video and audio using the MPEG2 system and broadcasts them using terrestrial waves and satellite waves. In this digital broadcasting system, encoded video data and audio data are packetized for each predetermined block.
A packet sequence obtained as a result is transmitted (hereinafter, a packet sequence is called a transport stream, and a packet forming the transport stream is called a TS (Transport Stream) packet). In this case, the TS packet is composed of a data section and a header section as shown in FIG. 17, the data section stores video data and audio data to be transmitted, and the header section includes a synchronization byte and a packet. An identifier (hereinafter, referred to as a PID) or various other packet control data is stored. Incidentally, the synchronization byte is data indicating the start of a packet, and the PID is data indicating the content of information stored in the packet.

In the digital broadcasting system, video and audio data of a plurality of programs are multiplexed by packetizing data to be transmitted in this manner, so that a plurality of programs can be broadcast on one line. Has been made. By the way, when a plurality of programs are multiplexed, the receiving side must extract and decode a TS packet storing video and audio data of a program desired by the viewer from the transmitted TS packets. The extraction process may complicate the processing on the receiving side. In digital broadcasting systems, PSI (Program Specific Informa
) is transmitted in the form of a packet.
, A TS packet of a desired program is extracted and decoded. By the way, PSI
Is packetized, the PSI is stored in the data portion of the packet structure shown in FIG.

This PSI is roughly divided into PMT (Prog
ram Map Table), PAT (Program Association Tabl)
e), CAT (Conditional Access Table), NIT
(Network Information Table). The PMT is a correspondence table (hereinafter, referred to as a table) indicating PID values of TS packets in which video and audio data constituting a program are stored. For example, a video having a program number "X" is a PID.
= “XV”, voice is a table with PID = “XA”. PAT is a table indicating the PID value of the TS packet in which the PMT is stored. For example, the PMT of the program number "0" is PID = "AA", the PMT of the program number "1" is PID = "BB", Program number "X"
Is a table in which PID = “XX”. The CAT is a table showing the PID value of the TS packet storing the decryption information for decrypting the scrambled video and audio data.
NIT is a table indicating the PID value of the TS packet in which physical information about the transmission path is stored. The PID value of the TS packet in which the NIT is stored is also PAT.
As specified by

When such a PSI is transmitted, the receiving side first obtains the PAT by extracting the TS packet storing the PAT, and refers to the PAT to determine the PMT of the program desired by the viewer. The stored TS packet is examined, the corresponding TS packet is extracted, and P
Get MT. Next, by referring to the PMT, the T and the video and audio data of the program desired by the viewer are stored.
The S packet is examined, the corresponding TS packet is extracted, video and audio data are obtained, and the data is decoded. Thereby, the receiving side can easily reproduce the program desired by the viewer.

[0008] In addition, in the digital broadcasting system, additional information regarding a program called SI (Service Information) is transmitted, and the receiving side is used in various forms.
Incidentally, this SI has a BAT (Bouquest Association).
Table), SDT (Service Description Table), E
IT (Event Information Table), TDT (Time and
Date Table), RST (Running Status Table), S
T (Stuffing Table) etc. For details, refer to the document "Digital Broadcasting systems for televisio" issued by the European Telecommunication Standardization Institute (ETSI).
n, sound and data services; Specification for Ser
vice Information (SI) in Digital Video Broadcastin
g (DVB) systems (ETS 300 468).

Incidentally, the PSI or SI described above, or the PI of a TS packet in which video data and audio data are stored.
The D value is predetermined as shown in FIG. That is, the PAT is stored in a TS packet having a PID of "0X0000", and the CAT is stored in a TS packet having a PID of "0X0001". PID is "0X0010"
NIT and ST are stored in the TS packet of PDT, SDT, BAT, and ST are stored in the TS packet of PID "0X0011", and EI is stored in the TS packet of PID "0X0012".
T and ST are stored, RST and ST are stored in a TS packet with a PID of “0X0013”, and TDT is stored in a TS packet with a PID of “0X0014”. TSs with PIDs from "0X0020" to "0X1FFE"
The packet stores PMT, NIT, video data and audio data.

[0010]

In order to realize a digital broadcasting system as described above, a configuration as shown in FIG. 19 is generally considered. That is, as shown in FIG. 19, the digital broadcasting system 1 encodes and transmits video and audio data, and transmits data transmitted from the transmission device 2 installed in each home or the like and transmitted from the transmission device 2 corresponding to a broadcasting station. And a receiving device 3 for receiving and decoding the received data.

The transmission device 2 generally has a configuration as shown in FIG. That is, as shown in FIG. 20, the transmission apparatus 2 encodes the input video and audio data S1 to S4 of each program by the MPEG2 system, and converts the encoded data into packets for each predetermined block and outputs the encoded data. 7 and the transport streams S5 to S8 output from the encoders 4 to 7 are multiplexed to 1
A multiplexer 8 for converting the transport stream S9 into one transport stream S9, a modulator 9 for modulating the transport stream S9 by a predetermined modulation method, and a transmission antenna 10 for transmitting a transmission signal S10 output from the modulator 9. Be composed.

In this case, the encoders 4 to 7 not only encode and packetize video and audio of each program, but also generate additional information such as PSI and SI for each program, and also packetize and output it. It has been made to be. Therefore, the transport streams S5 to S8 output from the encoders 4 to 7 include not only video and audio TS packets but also PSI and SI TS packets.

When the transmission apparatus 2 is configured as shown in FIG. 20, the encoders 4 to 7 packetize video and audio data for each program and PSI for each program.
And SI are generated and packetized, so the PID value added to the TS packet and the PSI and S, which are additional information, are added to the TS packet in the multiplexed transport stream S9.
When I is duplicated, or when the program numbers written in PSI and SI are duplicated, a problem occurs. When such a problem occurs, the receiving side may not be able to find the PMT of the program specified by the viewer, or may decode a program different from the specified program. Failure occurs.

In the case of the transmission apparatus 2, since the duplication occurs in the same apparatus, if the encoders 4 to 7 can be set in advance so that the PID value, PSI, SI and program number do not overlap, such a problem can be avoided. However, in the case of a transmission apparatus that receives a transport stream multiplexed by another transmission apparatus 2 and newly multiplexes another program with the multiplexed transport stream, However, such a problem cannot be avoided only by setting the encoder.

[0015] The present invention has been made in view of the above points. Even when a newly generated packet sequence is multiplexed with a packet sequence multiplexed by another transmission apparatus, the present invention is not limited thereto.
It is an object of the present invention to propose a transmission device and a transmission method capable of multiplexing without any trouble.

[0016]

According to the present invention, there is provided a plurality of encoding means for encoding inputted input data, packetizing the encoded data for each predetermined block, and outputting the encoded data. An additional information generating means for generating first additional information relating to the packetized input data, packetizing the first additional information and outputting the packet, and a packet sequence multiplexed by another transmission device as an element; A signal separating means for separating a packet sequence of data and a packet sequence of second additional information relating to the element data; and a first additional information and a second additional information which are combined into one by regenerating them. The additional information regenerating means for generating the obtained third additional information, packetizing the third additional information, and outputting the packet, and the packet sequence of the third additional information and the encoding means. And a plurality of packet columns and the element data packet sequence that is a force to be provided and multiplexing means for transmitting converted into one packet string by multiplexing.

[0017] The packet sequence multiplexed by the other transmission apparatus in this manner is separated into a packet sequence of element data and a packet sequence of second additional information relating to the element data, and the second additional information is transmitted. By regenerating the third additional information together with the first additional information to generate the third additional information combined into one, duplication of the additional information can be avoided with a simple configuration.

In the present invention, the input data is coded by a plurality of coding means for coding the input data, packetizing the coded data for each predetermined block, and outputting the coded data, and another transmission device. The packet sequence that was created is the packet sequence of the element data and the first
Signal separating means for separating the additional information into a packet sequence;
A packet sequence of the first additional information is input, and third additional information is generated by combining the first additional information with the second additional information relating to the packetized input data, and the third additional information is generated. One packet sequence by multiplexing a packet sequence of additional information, a packet sequence of the third additional information, a plurality of packet sequences output from the encoding device, and a packet sequence of element data; And a multiplexing means for converting the data into a data and transmitting the converted data.

The packet sequence multiplexed by the other transmission apparatus in this manner is separated into a packet sequence of element data and a packet sequence of first additional information related to the element data, and the packetized input data By generating the third additional information in which the first additional information is combined with the second additional information regarding the second additional information, it is possible to avoid duplication of the additional information without regenerating the additional information. Duplication of additional information can be avoided with a simple configuration.

Further, in the present invention, the packet identifier for correcting the packet identifier so that the packet identifier added to each packet of the element data is different from the packet identifier added to each packet output from the encoding means. An identifier correcting means is provided. By providing the packet identifier correcting means in this way to correct the packet identifier, duplication of the packet identifier can be easily avoided.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

In FIG. 1, in which parts corresponding to those in FIG. 19 are assigned the same reference numerals, reference numeral 20 denotes a digital broadcasting system as a whole according to this embodiment, which is roughly divided into first and second transmission devices 21 and 22. And a receiving device 3 for receiving a transmission signal transmitted from the transmission device 21 or 22. The first transmission device 21 is a transmission device that multiplexes video and audio data of a plurality of programs and transmits the multiplexed data using a predetermined satellite wave, and the second transmission device 22 is a first transmission device.
Receiving the transmission signal transmitted by the transmission device 21 of
This is a transmission device that multiplexes video and audio data of another new program with the received video and audio data, and transmits the multiplexed data using another satellite wave.

Here, the first transmission device 21 will be specifically described with reference to FIG. 2 in which the same reference numerals are given to the portions corresponding to those in FIG. The first transmission device 21 is roughly composed of a controller unit 25, encoders 26 to 29, a multiplexer 30, a modulator 9, and a transmission antenna 10, and is similar to the transmission device 2 shown in FIG. A new controller unit 25 is provided, and encoders 26 to 29 and a multiplexer 30 are provided.
Configuration has changed.

The controller unit 25 is a control means for managing the PID value of the TS packet and an additional information generating means for generating additional information such as PSI and SI. First, the controller unit 25 assigns different PID values to the respective encoders 26 to 29 by outputting the control signal S20 to the respective encoders 26 to 29, whereby the PID of the TS packet generated by each of the encoders 26 to 29 is assigned. Avoid duplicate values. For example, as shown in FIG. 3, the controller unit 25 uses the control signal S20 to provide the encoder 26 with a PID of “0X0100” in the video TS packet and the audio T
An instruction is issued to add a PID of “0X0101” to the S packet. In addition, the encoder 27 is instructed to add the PID “0X0102” to the video TS packet and the PID “0X0103” to the audio TS packet. Similarly, for the encoder 28, the PID of “0X0104” is assigned to the video TS packet, and “0X010” is assigned to the audio TS packet.
An instruction to add a PID of “5” is issued to the encoder 29, and a PI of “0X0106” is added to the TS packet of the video.
D is instructed to add a PID of "0X0107" to the audio TS packet. The controller unit 2
For example, RS-232C, RS-422A, or the like is used as a communication protocol of the control signal S20 output by the control unit 5.

The controller unit 25 determines each program (S1 to S) based on the PID value assigned as described above.
4) Generate additional information such as PSI and SI for
A transport stream S21 obtained by packetizing the generated PSI or SI is output to the multiplexer 30. More specifically, the controller unit 25
Assigns PID values to the encoders 26 to 29, and thus knows in advance the PID values of the TS packets of each program output from the encoders 26 to 29. Based on the PID value of each program, the controller unit 25 generates a PMT indicating the PID value of a TS packet storing, for example, video and audio data constituting each program, and generates a PMT indicating the PMT value of the TS packet storing the PMT. PI
A PAT indicating the D value is generated, and the generated PMT and PAT are generated.
The AT is packetized and output using the packet structure shown in FIG. Similarly, the controller unit 25 generates an SI based on the PID value of each program, converts the generated SI into packets, and outputs the packets.

At this time, the controller unit 25 sets the video and audio data S1 handled by the encoder 26 to the program number "0X0001", the video and audio data S2 handled by the encoder 27 to the program number "0X0002", and the video handled by the encoder 28. The PSI and the SI are generated with the program number “0X0003” for the audio and audio data S3 and the program number “0X0004” for the video and audio data S4 handled by the encoder 29. Further, as shown in FIG. 18, the controller unit 25
P of “0X0000” for TS packet in which AT is stored
An ID is added to the TS packet in which the PMT is stored, and a PID that does not overlap with video and audio is added from “0X0020” to “0X1FFE”. Similarly, the controller unit 25 includes BAT, SDT, EIT, and TD constituting the SI.
A non-overlapping PID as shown in FIG. 18 is also added to a TS packet storing T, RST, ST, and the like.

The encoders 26 to 29 are means for encoding video and audio data. The encoders 26 to 29 encode the video and audio data S1 to S4 of the respective inputted programs according to the MPEG2 system. Is packetized by a packet structure shown in FIG. 17 for each predetermined block and output. At this time, each of the encoders 26 to 29 adds a PID to the TS packet based on the PID value specified by the controller unit 25. The encoders 26 to 29 only encode and packetize video and audio data and do not generate PSI or SI. Therefore, the transport streams S22 to S25 output from the encoders 26 to 29 do not include TS packets of PSI or SI, and the TS of video as element data.
Only packets and audio TS packets are included.

The multiplexer 30 is a multiplexing means.
Video and audio TS supplied from encoders 26 to 29
Transport streams S22 to S composed of packets
25 and the PS supplied from the controller unit 25
By multiplexing with a transport stream S21 composed of TS packets of I and SI, it is converted into one transport stream S9 and output to the modulator 9.

The modulator 9 performs, for example, QPSK (Quadrature Phase Shift Keying) on a predetermined carrier based on the input transport stream S9 and then changes the frequency of the carrier to that of a satellite wave. Frequency conversion into a frequency band, and the resulting transmission signal S10
Is output. Transmission signal S1 output from modulator 9
0 is supplied to the transmitting antenna 10 and the transmitting antenna 1
0.

Here, the controller unit 25 will be specifically described with reference to FIG. The controller unit 25 includes the controller 25A and the SI / PSI generator 2.
5B. The controller 25A corresponds to a control means, manages the PID value instructed to each of the encoders 26 to 29 as described above, and outputs a control signal S20 to each of the encoders 26 to 29. Assign different PID values. Further, the controller 25A outputs the control signal S26, thereby changing the PID value assigned to each of the encoders 26 to 29 to S.
Notify the I / PSI generator 25B.

The SI / PSI generator 25B is additional information generating means, and P / P assigned to each of the encoders 26 to 29 by a control signal S26 supplied from the controller 25A.
Knowing the ID value, it generates additional information such as PSI and SI based on the PID value, converts them into TS packets, and outputs the resulting transport stream S21 to the multiplexer 30. Note that SI
The / PSI generator 25B adds a PID as shown in FIG. 18 to the generated PSI or SI TS packet, thereby avoiding duplication of PID values.

Next, the encoders 26 to 29 will be described with reference to FIG.
This will be specifically described with reference to FIG. However, encoders 26-2
9 have the same configuration, so here the encoder 26
Will be described. In the encoder 26, first, the input video and audio data S 1 is input to the switch 31. The switch 31 supplies the video data S1A of the video and audio data S1 to the video encoder 32, and supplies the audio data S1B to the audio encoder 33.

A control signal S20 from the controller unit 25 is input to the video encoder 32, and the control signal S20 instructs the TS packet to add a PID of "0X0100" to the TS packet. The video encoder 32 sequentially encodes the input video data S1A based on the MPEG2 system, converts the coded video data into packets for each predetermined block in a packet structure shown in FIG. 17, and obtains the resulting transport stream S2.
7 is output. At this time, the video encoder 32 adds a PID of “0X0100” to the TS packet of the generated video.

A control signal S20 from the controller unit 25 is also input to the audio encoder 33, and the control signal S20 instructs the TS packet to add a PID of "0X0101" to the TS packet.
The audio encoder 33 receives the input audio data S1
B is sequentially encoded based on the MPEG2 audio standard system, and the encoded audio data is packetized for each predetermined block in a packet structure shown in FIG. 17, and the resulting transport stream S28 is output. that time,
The audio encoder 33 adds a PID of “0X0101” to the generated audio TS packet.

The switch 34 switches at a predetermined timing to multiplex the transport streams S27 and S28 output from the video encoder 32 and the audio encoder 33, respectively, and converts them into one transport stream S22. Incidentally, the video encoder 32 and the audio encoder 33 are controlled so as to output the respective transport streams S27 and S28 when the switch 34 is connected, whereby the transport streams S27 and S28 are multiplexed without loss of information. It has been made possible.

Next, the multiplexer 30 will be specifically described with reference to FIG. The multiplexer 30 is roughly divided into a buffering memory (FIFO) 40.
44, a null packet generator 45 and a switch 46. The transport stream S21 composed of TS packets of PSI and SI supplied from the controller unit 25 is input to the memory 40, and the video and audio T supplied from the encoders 26 to 29 are transmitted.
Transport stream S22 composed of S packets
S25 is input to the memories 41 to 44, respectively. The memories 40 to 44 perform buffering processing by temporarily storing the input transport streams S21 to S25, and output the transport streams S21 to S25 in accordance with the multiplexing timing by the switch 46 at the subsequent stage. . Incidentally, by performing the buffering process by the memories 40 to 44 in this manner, the transport stream S21 can be transmitted without any information loss.
~ S25 can be multiplexed.

The switch 46 switches at a predetermined timing, multiplexes the transport streams S21 to S25 output from the memories 40 to 44, and converts them into one transport stream S9. By the way,
The null packet generator 45 is a circuit for generating a blank packet (hereinafter referred to as a null packet) that has no particular meaning as data when the contents of each of the memories 40 to 44 are empty. When the contents of 44 are empty, the transport stream S29 consisting of a null packet is selected to compensate for the shortage of transmission capacity.

As described above, in the first transmission device 21,
The video and audio data S1 to S4 of each program are encoded and encoded by encoders 26 to 29, and PSI and SI are generated by the controller unit 25 to be converted into packets. By multiplexing these transport streams S21 to S25, video and audio data of a plurality of programs are transmitted over one line. Further, in the first transmission apparatus 21, the additional information such as PSI and SI is collectively generated by the controller unit 25, so that duplication of the additional information can be avoided.

On the other hand, as shown in FIG. 7, the second transmission device 22 has a reception unit 50 for receiving the transmission signal S10 multiplexed by the first transmission device 21, and the reception unit 5
The video and audio data S30 to S33 of the new program can be multiplexed with the video and audio data obtained according to the above-mentioned method, and has a configuration having a so-called pass-through channel. First, the receiving antenna 51 receives the transmission signal S10 transmitted by the transmission device 21, and supplies the resulting reception signal S34 to the demodulator 52. The demodulator 52 converts the frequency of the received signal S34 into a baseband signal, and then demodulates the baseband signal, thereby transmitting the transport stream S9 on the transmission side.
Restores the transport stream S35 corresponding to
The transport stream S35 is output to the multiplexer 53.

The controller unit 54 is a control means for managing the PID value of the TS packet in the same manner as the controller unit 25 of the first transmission apparatus 21, and also has a PSI.
And additional information generating means for generating additional information such as SI. First, the controller unit 54 receives the control signal S36.
Is output to each of the encoders 55 to 58 so that different PID values are assigned to the respective encoders 55 to 58 so that the PID values of the TS packets generated by the encoders 55 to 58 do not overlap. For example, as shown in FIG. 8, the controller unit 54 uses the control signal S36 to give the encoder 55 a PID of “0X0100” in the TS packet of the video and the T
An instruction is issued to add a PID of “0X0101” to the S packet. In addition, the encoder 56 is instructed to add the PID “0X0102” to the video TS packet and the PID “0X0103” to the audio TS packet. Similarly, for the encoder 57, the PID “0X0104” is assigned to the video TS packet, and “0X010” is assigned to the audio TS packet.
An instruction to add a PID of “5” is given to the encoder 58, and a PI of “0X0106” is added to the TS packet of the video.
D is instructed to add a PID of "0X0107" to the audio TS packet. Incidentally, also in this case, the communication protocol of the control signal S36 is, for example, RS-232C.
And RS-422A.

Further, the controller unit 54 generates additional information such as PSI and SI related to the newly multiplexed program (S30 to S33) based on the PID value allocated as described above, and generates the generated PSI and SI. Is output to the multiplexer 53. More specifically, the controller unit 54 sends P to the encoders 55-58.
Since the ID value is assigned, the encoder 55
The PID value of the TS packet of each program output from 58 is known in advance. Based on the PID value of each program, the controller unit 54 generates a PMT indicating the PID value of a TS packet storing, for example, video and audio data constituting each program, and generates a PMT indicating the PMT value of the TS packet storing the PMT. A PAT indicating a PID value is generated, and the generated PMT and PAT are packetized and output according to the packet structure shown in FIG. Similarly, regarding SI,
The controller unit 54 generates the SI based on the PID value of each program, converts the generated SI into packets, and outputs the packets.

At this time, the controller unit 54 sets the video and audio data S30 handled by the encoder 55 to the program number "0X0001", the video and audio data S31 handled by the encoder 56 to the program number "0X0002",
The video and audio data S32 handled in Step 7 is assigned the program number "0X000
3 "and the video and audio data S handled by the encoder 58
The PSI or SI is generated with the program number 33 as the program number “0X0004”. Further, as shown in FIG. 18, the controller unit 54 sets “0X00” for the TS packet in which the PAT is stored.
A PID of "00" is added to the TS packet in which the PMT is stored, and a PID that does not overlap with video and audio among "0X0020" to "0X1FFE" is added. Similarly, the controller unit 54 includes BAT, SDT, and EI constituting SI.
A non-overlapping PID as shown in FIG. 18 is also added to a TS packet storing T, TDT, RST, ST, and the like.

The controller unit 54 outputs a control signal S38 to the multiplexer 53 to instruct the multiplexer 53 to extract the video and audio data of the desired program from the received transport stream S35, which will be described later. It instructs regeneration of PSI and SI and modification of PID value. Incidentally, as a communication protocol of the control signal S38, for example, RS-
232C and RS-422A are used.

Encoders 55 to 58 are means for encoding video and audio data. The encoders 55 to 58 encode the video and audio data S30 to S33 of each of the inputted programs according to the MPEG2 system, respectively. Is packetized by a packet structure shown in FIG. 17 for each predetermined block and output. At this time, the encoders 55 to 58 each have the PID specified by the controller unit 54.
The PID is added to the TS packet based on the value. The encoders 55 to 58 only encode and packetize video and audio data and do not generate PSI or SI.
Therefore, the transport streams S39 to S42 output from the encoders 55 to 58 include the TSI
The S packet is not included, but only the video TS packet and the audio TS packet, which are the element data, are included.

The multiplexer 53 is a multiplexing means.
Video and audio TS supplied from encoders 55 to 58
Transport streams S39 to S composed of packets
42 and the PS supplied from the controller unit 54
A transport stream S37 composed of TS packets of I or SI and a transport stream of a desired program in the transport stream S35 received by the receiving unit 50 (hereinafter, in this embodiment, the transport stream S22 in FIG. 2) , S23 are extracted) and the PS of the transport stream S35
The transport stream of I or SI (transport stream S21 in FIG. 2) is multiplexed to be converted into one transport stream S43.

When these transport streams are simply multiplexed in the multiplexer 53,
The same PID value is added to the encoder 26 of the first transmission device 21 and the encoder 55 of the second transmission device 22, and the encoder 27 of the first transmission device 21 and the encoder 56 of the second transmission device 22, respectively. Therefore, PID values are duplicated, and PSI or SI generated by the first transmission device 21 and PID generated by the controller unit 54 are generated.
SI and SI overlap. Therefore, the multiplexer 53
In the above, the duplication of the PID values is avoided by adding another PID value to the TS packet of the transport stream generated by the first transmission device 21, and the TS packet is generated by the first transmission device 21. By regenerating the PSI or SI together with the PSI or SI generated by the controller unit 54, duplication of additional information such as PSI or SI is avoided.

The transport stream S43 in which duplication of PID values and duplication of additional information has been avoided in this way.
Is supplied to the modulator 59. The modulator 59 assigns, for example, Q to a predetermined carrier based on the transport stream S43.
After performing the PSK modulation, the frequency of the carrier is converted to the frequency band of the satellite wave, and the transmission signal S44 obtained as a result is output. The transmission signal S44 output from the modulator 59 is supplied to the transmission antenna 60 and transmitted via the transmission antenna 60.

The controller unit 54 described above
Is specifically described with reference to FIG. The controller unit 54 is substantially the same as the controller unit 25 of the first transmission device 21, and is roughly divided into a controller 54A and an SI / PSI generator 54B. The controller 54A corresponds to control means, and as described above, each of the encoders 55 to 58
, Which manages the PID value specified for the control signal S
By outputting 36, a different PID value is assigned to each encoder 55-58. Also, the controller 54A
Notifies the SI / PSI generator 54B of the PID values assigned to the encoders 55 to 58 by outputting the control signal S45. Further, the controller 54A manages the operation of the multiplexer 53 as described above, and by outputting the control signal S38, the transport stream S3 received by the multiplexer 53.
5 to extract the transport stream of the desired program, regenerate PSI and SI, and
Instructs correction of D value.

The SI / PSI generator 54B is additional information generating means, and P / P assigned to each of the encoders 55 to 58 by a control signal S45 supplied from the controller 54A.
Knowing the ID value, each program (S30
ＳＩS33), generate SI and PSI, convert them into TS packets, and output the resulting transport stream S37. Note that SI / P
The SI generator 54B adds a PID as shown in FIG. 18 to the generated PSI or SI TS packet, thereby avoiding duplication of PID values.

Next, the encoders 55 to 58 will be described with reference to FIG.
This will be specifically described using 0. As shown in FIG. 10, the encoders 55 to 58 have the same configuration as the encoders 26 to 29 of the first transmission device 21, and are roughly divided into switches 61 and 64, a video encoder 62, and an audio encoder 63. It is composed of Hereinafter, since the configuration is the same, the encoder 55 will be described here. In the encoder 55, first, the input video and audio data S 30 is input to the switch 61. The switch 61 supplies the video data S30A of the video and audio data S30 to the video encoder 62, and supplies the audio data S30B to the audio encoder 63.

The video encoder 62 sequentially encodes the input video data S30A based on the MPEG2 system, converts the coded video data into packets for each predetermined block in a packet structure shown in FIG. 17, and obtains the result. The transport stream S50 is output. At this time, the video encoder 62 is connected to the controller unit 5
4 based on the control signal S36, a PID “0X0100” is added to the video TS packet.

The audio encoder 63 sequentially encodes the input audio data S30B based on the MPEG2 audio standard system, converts the encoded audio data into packets for each predetermined block in a packet structure shown in FIG. 17, and obtains the result. The transport stream S51 is output. At this time, the audio encoder 63 outputs the audio T based on the control signal S36 from the controller unit 54.
A PID of “0X0101” is added to the S packet.

The switch 64 switches at a predetermined timing, multiplexes the transport streams S50 and S51 output from the video encoder 62 and the audio encoder 63, respectively, and converts them into one transport stream S39. Incidentally, the video encoder 62 and the audio encoder 63 are controlled so as to output the respective transport streams S50 and S51 when the switch 64 is connected, whereby the transport streams S50 and S51 are multiplexed without loss of information. obtain.

Next, regarding the multiplexer 53, FIG.
This will be specifically described with reference to FIG. The multiplexer 53 has a configuration in which switches 65 and 66, an SI / PSI regenerator 67, and a PID regenerator 68 are newly added to the multiplexer 30 of the first transmission device 21, and is roughly divided into a buffer for buffering. Memory (FIFO) 69-7
4. Null packet generator 75, switches 65, 66, 7
6. SI / PSI regenerator 67 and PID regenerator 68
It is comprised by. The transport streams S3 from the encoders 55 to 58 are stored in the memories 69 to 72.
9 to S42 are input, and the memories 69 to 7
2 is the input transport stream S3
9 to S42 are temporarily stored to perform a buffering process, and the transport stream S39 is synchronized with the multiplexing timing by the switch 76 at the subsequent stage.
To S42.

On the other hand, the transport stream S 35 from the receiving unit 50 is first input to the switch 65. The switch 65 is provided as a signal extracting means, and is provided with a control signal S3 from the controller unit 54.
8 to extract a transport stream S52 of the program specified by the controller unit 54 and a transport stream S53 of PSI or SI. More specifically, the switch 65 extracts the transport streams S52 and S53 by being turned on at the timing of the TS packet of the video and audio and the timing of the TS packet of PSI and SI which constitute the designated program.

The transport streams S52 and S53 extracted by the switch 65 are transmitted to the next switch 66.
, Where a separation operation, so-called demultiplexing, is performed. The switch 66 is provided as a signal separating means, and the input is the transport stream S5.
3, the output stream is switched to the output terminal A side, and when the input is the transport stream S52, the stream is switched to the output terminal B side, thereby separating the transport stream S52 and the transport stream S53. In this way, the switch 66 performs the separation operation, and the resulting PS
The transport stream S53, which is system data such as I or SI, is supplied to the subsequent SI / PSI regenerator 67, and the transport stream S52, which is video or audio, is transmitted to the memory 74.

The memory 74 performs buffering processing by temporarily storing the input transport stream S52, and matches the transport stream S52 in accordance with the multiplexing timing by the switch 76 at the subsequent stage.
52 is output. On the other hand, to the SI / PSI regenerator 67, in addition to the transport stream S53 separated by the switch 66, a transport stream S37 composed of PSI and SI generated by the controller unit 54 is input. The SI / PSI regenerator 67 regenerates them together to generate 1
PSI or SI is generated, and the PSI or SI combined with the multiplexed transport stream S43 is thereby generated.
Generate SI and SI.

More specifically, the extracted PSI or S
If the transport stream S53 of I is multiplexed as it is, the P generated by the controller unit 54
It may overlap with the SI or the transport stream S37 of the SI, and may not be able to know which PSI or SI to refer to on the receiving side. Further, the extracted PSI and SI also include information relating to the unextracted programs. If the transport stream S53 is multiplexed as it is, additional information relating to the untransmitted programs will be transmitted, and extra information will be transmitted. become. Further, since the PID value of the TS packet is overlapped between the received transport stream S52 and the transport streams S39 to S42 generated in the second transmission device 22, the PID regenerator 68 will be described later. Modify the PID value. Therefore, the PID value written in the PSI or SI does not match the actual one,
Causes inconvenience.

Therefore, the SI / PSI regenerator 67 regenerates the extracted PSI or SI together with the PSI or SI generated by the controller unit 54, thereby regenerating the SI / PSI.
Avoid these problems. This will be described below with reference to specific examples. When matching the extracted PSI and SI with the PSI and SI generated by the controller unit 54, the program number and the PID value can be considered as the parts that need to be corrected in terms of contents. These corrections are managed by the controller unit 54 and the SI / PSI generator 67 is controlled by the controller unit 5.
4 to receive these correction instructions.

For example, when the transport streams S22 and S23 generated by the encoders 26 and 27 of the first transmission device 21 are extracted as the transport stream S52, as shown in FIGS. 12 and 13, the encoders 26 and 27 are extracted. The PID values and the program numbers of the transport streams S22 and S23 generated in
5, the transport stream S39 generated in 56,
It overlaps with the PID value and the program number in S40. Therefore, the controller unit 54 instructs to correct the PID value and the program number in this part. That is, encoder 2
In the transport stream S22 generated in step 6, the PID value of the video TS packet is set to “0X0108” and the audio T
An instruction is issued to correct the PID value of the S packet to “0X0109”, and the PI of the video TS packet in the transport stream S23 generated by the encoder 27 is output.
An instruction is issued to modify the D value to "0X010A" and the PID value of the audio TS packet to "0X010B" (by the way, this instruction is also supplied to the PID regenerator 68, and is transmitted to the TS packet as described later). The correction of the added PID value is performed by the PID regenerator 68). The transport stream S22 generated by the encoder 26 is instructed to correct the program number to “0X0005”, and the transport stream S23 generated by the encoder 27 is set to “0X0006”. Give instructions to fix.

The SI / PSI regenerator 67 extracts the extracted PS
When the I and SI (S53) and the PSI and SI (S37) generated by the controller unit 54 are regenerated together, the PID value written in the PSI or SI based on the instruction from the controller unit 54 described above. And the program number. For example, the program number and the PID value written in the PMT for the extracted transport stream S52 are corrected, and the PID value and the program number of the portion related to the transport stream S52 in the PAT are corrected. At this time, the part related to the program not extracted is deleted. Thus, the program number and PI
By correcting the D value and deleting unnecessary parts to unite the PSI and the SI, the duplication of the PSI and the SI can be avoided, and the duplication of the PID value can be avoided.
Furthermore, transmission of unnecessary information can be avoided.

The transport stream S 54 of PSI and SI adjusted to the transport stream S 43 after multiplexing in this way is input to the memory 73. The memory 73 performs a buffering process by temporarily storing the input transport stream S54, and outputs the transport stream S54 in accordance with the multiplexing timing by the switch 76 at the subsequent stage.

The switch 76 is switched at a predetermined timing, so that the transport streams S39 to S42, S54 and S5 output from the memories 69 to 74 are switched.
2 and one transport stream S55
Convert to Incidentally, the null packet generator 75 is a circuit for generating a null packet when the contents of the memories 69 to 74 are empty, and the switch 76 outputs a transport stream S56 consisting of a null packet when the contents of the memories 69 to 74 are empty. The selection makes up for the lack of transmission capacity.

The transport stream S55 multiplexed by the switch 76 is input to a PID regenerator 68 provided as packet identifier correcting means. The PID regenerator 68 has the controller unit 5
4, the control signal S38 receives the instruction to correct the PID value as described above. The PID regenerator 68 modifies the PID value of the corresponding TS packet in the transport stream S55 based on this instruction. For example, as the transport stream S52, the encoder 2 of the first transmission device 21
6, the transport stream S22 generated in
When S23 is extracted, as shown in FIG. 12, the PID value of the video TS packet in the transport stream S22 is corrected to "0X0108", and the PID value of the audio TS packet is corrected to "0X0109". In the transport stream S23, the PID value of the video TS packet is corrected to "0X010A", and the PID value of the audio TS packet is corrected to "0X010B". If the PMT value of the PMT for the transport stream S52 overlaps with the PID value of the PMT for the transport streams S39 to S42, the PID value is modified so as not to overlap. At that time, the PID value of that part is also corrected by the SI / PSI regenerator 67. The transport stream S43 whose PID value has been corrected by the PID regenerator 68 in this way is supplied to the modulator 59 as described above, converted into a transmission signal S44, and transmitted.

Next, the receiving device 3 will be described with reference to FIG. The receiving device 3 includes a receiving antenna 80, a demodulator 81
And a decoder 82, and a receiving antenna 80
Is input to the demodulator 81. The demodulator 81 converts the frequency of the received signal S60 into a baseband signal, and then demodulates the baseband signal to restore the transport stream S61 corresponding to the transport stream S9 or S43 on the transmitting side. Port stream S6
1 is output to the decoder 82.

The decoder 82 is a decoding means, and in accordance with a viewer's instruction input from an instruction unit (not shown), a TS packet and audio of a video constituting a program designated by the viewer from the transport stream S61. The video and audio data S62 is reproduced by extracting the TS packet and decoding it. At this time, the decoder 82 performs a decoding process based on PSI which is additional information on the program. That is, the decoder 82 first determines the TS in which the PAT is stored.
The PAT is obtained by extracting the packet, and then the TS packet storing the PMT of the designated program is extracted with reference to the PAT. Then, the PMT values of the video TS packet and the audio TS packet constituting the designated program are checked by referring to the obtained PMT, and the TS packets constituting the program are extracted based on the examination result. The video and audio data S6 thus reproduced
2 is supplied to, for example, a television device or the like, where it is broadcast.

In the above configuration, the transmission device 22 according to this embodiment receives the transport stream S35 multiplexed by the first transmission device 21, and transmits a new program to the transport stream S35. The transport streams S39 to S42 are multiplexed and transmitted. At this time, in the transmission device 22, the multiplexer 5
The switch 65 in 3 extracts a video and audio TS packet (S52) constituting the desired program from the transport stream S35, and extracts a PSI or SI TS packet (S53) as additional information relating to the program. Extract. The extracted TS packets (S52, S5
3) is separated by the next switch 66, the video and audio TS packets (S52) are supplied to the memory 74,
The SI and the TS packet of the SI (S53) are supplied to the SI / PSI regenerator 67.

The SI / PSI regenerator 67 has a TS packet of PSI or SI generated for the newly multiplexed transport streams S39 to S42 (S37).
Is also input, and the SI / PSI regenerator 67
By regenerating the SI or SI TS packet (S37) and the PSI or SI TS packet (S53) extracted from the transport stream S35 again, 1
Thus, the PSI and the SI that match the multiplexed transport stream S43 are generated. Thus, the transmission device 22 generates the PS generated by the transmission device 21.
I, SI and PSI, SI generated in the transmission device 22
Can be easily avoided with a simple configuration. Also SI
/ PSI regenerator 67 includes a PID regenerator 68 at a subsequent stage.
The PID value written in the PSI or SI is corrected, for example, as shown in FIG. 12 in accordance with the correction of the PID value in (1), and the overlapping program number is corrected, for example, as shown in FIG. As a result, duplication of PID values and program numbers written in PSI and SI can be avoided, and the receiving device 3
Can prevent the wrong program from being decoded by mistake.

The PSI and SI thus regenerated are
After the TS packet (S54) is temporarily stored in the memory 73, the transport stream S52 and the transport streams S39 to S42 are switched by the switch 76.
And one transport stream S
55. This transport stream 55
Is input to the PID regenerator 68 where the duplicate PI
The D value is modified. Specifically, the PID value of the transport stream S52 generated by the first transmission device 21 is modified so as to be different from the newly multiplexed transport streams S39 to S42, for example, as shown in FIG. As a result, in the transmission device 22, the transport stream S52 generated by the first transmission device 21
And the transport stream S39 to be newly multiplexed
Overlapping of PID values between S42 and S42 can be easily avoided with a simple configuration, whereby decoding of a wrong program in the receiving device 3 by mistake can be avoided.

As described above, in the transmission device 22,
A new transport stream S3 is added to the transport stream S35 generated by the first transmission device 21.
9 to S42, the PSI or SI transport stream S
53 is separated, and the PSI or SI transport stream S53 and the PSI or SI transport stream S37 generated by the transmission device 22 are combined and regenerated by the SI / PSI regenerator 67, thereby obtaining 1 Into one transport stream S54. Thereby, the PSI or SI generated by the transmission device 21 and the transmission device 2
2 can be easily avoided with a simple configuration.

In the transmission device 22, the PID regenerator 68 newly multiplexes the PID values added to the transport stream S52 generated by the first transmission device 21 into transport streams S39 to S39.
It is corrected to a value different from the PID value in S42. Thus, the PID in the multiplexed transport stream S55
Duplicate values can be easily avoided with a simple configuration.

According to the above configuration, the first transmission device 21
When multiplexing the new transport streams S39 to S42 with the transport stream S35 generated in the above, the transport stream S53 of PSI or SI is separated from the transport stream S35, and the transport stream S53 of PSI or SI is separated. And the PSI or SI transport stream S37 generated by the transmission device 22 by the SI / PSI regenerator 67 to regenerate the PSI or SI.
Duplication of additional information such as I can be easily avoided with a simple configuration. Transport streams S39 to S42 for newly multiplexing the PID value added to the transport stream S52 generated by the first transmission device 21.
Value regenerator 68 that corrects the PID value to a value different from the PID value
Is provided, it is possible to easily avoid duplication of PID values with a simple configuration. In this way, duplication of additional information and duplication of PID values can be avoided, so that even if a new packet sequence is multiplexed with a packet sequence multiplexed by another transmission device 21, it can be multiplexed without any trouble. The transmission device 22 can be realized.

In the above-described embodiment, the PSI or SI transport stream S53 is separated by the switch 66 of the multiplexer 53, and the PSI or SI transport stream S53 is separated.
A description will be given of a case in which PSI and SI are combined into one by regenerating the transport stream S53 and the transport stream S37 of PSI and SI generated by the controller unit 54 by the SI / PSI regenerator 67. However, the present invention is not limited to this, and the switch 91 separates the transport stream S53 of PSI or SI from the transport stream S35 as shown in FIG. Then, based on the transport stream S53, the PSI or SI combined by the controller unit 92 into one unit.
May be generated.

Specifically, first, the received transport stream S 35 is input to the switch 91. This switch 91 is provided as signal separation means.
The transport stream S35 is a PSI or SI TS
The transport stream S35 is switched to the terminal C side in the case of a packet, and the transport stream S35 is switched to the terminal D side in the case of a video or audio TS packet. It is separated into S35 'and a PSI or SI transport stream S53, which is additional information on the element data. PS isolated
The transport stream S53 of I or SI is input to a controller unit 92 which is an additional information generating means. The controller unit 92 includes encoders 55 to 5
8 based on the PID value assigned to each program (S30 to S30).
33), a new PSI or SI is generated by combining the generated PSI or SI with the input PSI or SI, and the transport stream S54 obtained by packetizing the PSI or SI is output to the multiplexer 93.
Output to

As a result, as shown in FIG. 16, in the multiplexer 93, the input video and audio transport streams S39 to S42 and S35 'and the PSI and SI
Simply multiplexes with the transport stream S54, the configuration of the multiplexer 93 can be simplified by the amount that the SI / PSI regenerator 67 becomes unnecessary, and the configuration of the transmission apparatus as a whole can be further simplified. Can be Incidentally, the controller unit 92 has substantially the same configuration as the controller unit 54 shown in FIG. 9, and supplies the separated PSI or SI transport stream S53 to the SI / PSI generator. What is necessary is just to generate the summarized PSI and SI.

In the above embodiment, the transmission device 2
Transport streams S9, S4 in 1, 22
3 was transmitted using satellite waves,
The present invention is not limited to this, and transmission may be performed using, for example, terrestrial waves, a predetermined wired cable, or a predetermined public line network. The point is that the transport streams S9 and S43 may be transmitted to a predetermined transmission path.

In the above embodiment, the modulator 9,
Although the case where QPSK modulation is used as the modulation scheme 59 has been described, the present invention is not limited to this and the modulators 9 and 59 are used.
For example, QAM modulation (Quadrature Ampli
tude Modulation: Quadrature amplitude modulation or OFDM modulation (Or
thogonal Frequency Division Multiplex (orthogonal frequency division multiplexing) may be used.

In the above-described embodiment, the case where the input four video and audio data S30 to S33 are multiplexed on the received transport stream S35, that is, the case of four-channel multiplexing has been described. The present invention is not limited to this, and may be, for example, six-channel multiplexing or eight-channel multiplexing. In short, the number of channels is not limited.

In the above-described embodiment, the case where the transport streams S22 and S23 generated by the encoders 26 and 27 of the first transmission apparatus 21 are extracted as the transport stream S52 has been described.
The present invention is not limited to this. For example, the transport streams S24 and S25 generated by the encoders 28 and 29 of the first transmission device 21 may be extracted.

In the above-described embodiment, the case where null packet generators 45 and 75 are provided in the multiplexers 30 and 53 has been described. However, the present invention is not limited to this, and the transmission capacity becomes insufficient when multiplexed. Video and audio data S1 to S4 or S30 to S3 input in advance so as not to
When the data amount of No. 3 is controlled, the null packet generator may not be provided in the multiplexer.

In the above embodiment, the transport stream S 52 generated by the first transmission device 21 is used.
Has been described, the present invention is not limited to this. The PI of transport streams S39 to S42 generated by the second transmission device 22 is modified.
The D value may be corrected. The point is that the PID added to the TS packet generated by the other transmission device 21
And T generated by the encoders 55 to 58 of the transmission device 22.
If the PID of the S packet is modified to be different, the PI
Duplicate D values can be easily avoided.

In the above embodiment, the case where a plurality of input video and audio data are multiplexed has been described. However, the present invention is not limited to this. For example, only a plurality of input video and audio data are multiplexed. Alternatively, only a plurality of input audio data may be multiplexed.

In the above-described embodiment, a case has been described in which PSI or SI, which is additional information relating to a program, is regenerated by the SI / PSI regenerator 67. The additional information relating to the input data and the additional information relating to the element data multiplexed by another transmission device may be regenerated by the additional information regenerating means. Not limited to this,
Corresponding to the above-described modification, additional information in which additional information relating to packetized input data and additional information relating to element data multiplexed by another transmission device are combined is generated in advance by the additional information generating means. You may do it.

Further, in the above-described embodiment, the case where the present invention is applied to the transmission device 22 for multiplexing and transmitting video and audio data has been described. However, the present invention is not limited to this, and the present invention is not limited to this. The present invention can be widely applied to any transmission apparatus that multiplexes data and data generated by another transmission apparatus and transmits the multiplexed data.

[0085]

As described above, according to the present invention, a packet sequence multiplexed by another transmission device is separated into a packet sequence of element data and a packet sequence of second additional information related to the element data. Then, by regenerating the second additional information and the first additional information together, 1
By generating the third additional information integrated into one, duplication of the additional information can be avoided with a simple configuration,
Thus, even when a newly generated packet sequence is multiplexed with a packet sequence multiplexed by another transmission device, a transmission device capable of multiplexing without any trouble can be realized.

Further, according to the present invention, a packet sequence multiplexed by another transmission device is separated into a packet sequence of element data and a packet sequence of first additional information related to the element data, and are packetized. By generating the third additional information in which the first additional information is combined with the second additional information relating to the input data, it is possible to avoid duplication of the additional information without regenerating the additional information, Thus, even when a newly generated packet sequence is multiplexed with a packet sequence multiplexed by another transmission device, a transmission device capable of multiplexing without any trouble can be realized.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a digital broadcasting system according to one embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a first transmission device.

FIG. 3 is a table showing PID values assigned to each encoder.

FIG. 4 is a block diagram showing a configuration of a controller unit of the first transmission device.

FIG. 5 is a block diagram showing a configuration of an encoder of the first transmission device.

FIG. 6 is a block diagram showing a configuration of a multiplexer of the first transmission device.

FIG. 7 is a block diagram showing a configuration of a second transmission device.

FIG. 8 is a chart showing PID values assigned to each encoder.

FIG. 9 is a block diagram showing a configuration of a controller unit of the second transmission device.

FIG. 10 is a block diagram showing a configuration of an encoder of the second transmission device.

FIG. 11 is a block diagram showing a configuration of a multiplexer of the second transmission device.

FIG. 12 is a chart showing PID values to be modified.

FIG. 13 is a chart showing program numbers to be corrected.

FIG. 14 is a block diagram showing a configuration of a receiving device.

FIG. 15 is a block diagram showing a configuration of a second transmission device according to another embodiment.

FIG. 16 is a block diagram showing a configuration of a multiplexer of the second transmission device.

FIG. 17 is a schematic diagram showing a packet structure of a TS packet.

FIG. 18 is a table showing the correspondence between PID values and stored information.

FIG. 19 is a block diagram showing a configuration of a digital broadcasting system.

FIG. 20 is a block diagram showing a configuration of a transmission device.

[Explanation of symbols]

1,20 ... Digital broadcasting system, 2,21,22
... Transmission device, 3 ... Reception device, 4-7, 26-29,
55-58 ... Encoder, 8, 30, 53, 93 ...
Multiplexers, 9, 59 ... modulators, 10, 60 ...
Transmitting antennas, 25, 54, 92 Controller unit, 50 Receiver, 51 Receiving antenna, 52
... demodulator, 67 ... SI / PSI regenerator, 68 ... P
ID regenerator.

Claims (12)

[Claims] A plurality of encoding means for encoding inputted input data, packetizing the encoded data for each predetermined block and outputting the encoded data, and first additional information relating to the packetized input data. An additional information generating means for generating, packetizing the first additional information and outputting the packet, and a packet sequence multiplexed by another transmission device, a packet sequence of element data and second additional information relating to the element data. A signal separating means for separating the packet into a sequence of packets; generating a third additional information united by regenerating the first additional information and the second additional information together; An additional information regenerating means for packetizing and outputting the third additional information; a packet sequence of the third additional information; a plurality of packet sequences output from the encoding means; Multiplexing means for multiplexing a packet sequence of the comment data with the packet sequence to convert the packet sequence into one packet sequence and transmitting the packet sequence. 2. The transmission apparatus according to claim 1, wherein said input data and said element data are video data and / or audio data. 3. The packet multiplexing means according to claim 1, wherein said packet identifier added to each packet of said element data is different from a packet identifier added to each packet outputted from said encoding means. 2. The transmission apparatus according to claim 1, further comprising a packet identifier correcting unit that corrects the packet identifier. 4. A plurality of encoding means for encoding inputted input data, packetizing the encoded data for each predetermined block, and outputting the encoded data, and a packet sequence multiplexed by another transmission apparatus. Signal separating means for separating a packet sequence of the element data into a packet sequence of the first additional information relating to the element data; and a second sequence relating to the packetized input data, wherein the packet sequence of the first additional information is inputted. Additional information generating means for generating third additional information in which the first additional information is combined with the additional information of the above, packetizing the third additional information and outputting the packet, and a packet of the third additional information. By multiplexing the sequence, a plurality of packet sequences output from the encoding means, and the packet sequence of the element data, the data is converted into one packet sequence and transmitted. Transmission apparatus characterized by comprising a means. 5. The transmission apparatus according to claim 4, wherein said input data and said element data comprise video data and / or audio data. 6. The packet multiplexing means so that a packet identifier added to each packet of the element data is different from a packet identifier added to each packet outputted from the encoding means. 5. The transmission apparatus according to claim 4, further comprising a packet identifier correcting means for correcting the packet identifier. 7. A plurality of encoding steps for encoding inputted input data, packetizing the encoded data for each predetermined block, and outputting the encoded data, and first additional information relating to the packetized input data. An additional information generating step of generating and packetizing the first additional information and outputting the packet; and a packet sequence multiplexed by another transmission device being a packet sequence of element data and second additional information relating to the element data. A signal separation step of separating the packet into a packet sequence of the first and the second additional information, and regenerating the first additional information and the second additional information together to generate a third additional information united into one; An additional information regenerating step of packetizing the third additional information and outputting the packet; and a packet sequence of the third additional information and a plurality of packets output from the encoding step. A multiplexing step comprising multiplexing a packet sequence and a packet sequence of the element data to convert the packet sequence into one packet sequence and transmitting the multiplexed packet sequence. 8. The transmission method according to claim 7, wherein said input data and said element data comprise video data and / or audio data. 9. The multiplexing step is such that a packet identifier added to each packet of the element data is different from a packet identifier added to each packet output from the encoding step. 8. The transmission method according to claim 7, further comprising a packet identifier modification step for modifying the packet identifier. 10. A plurality of encoding steps for encoding input input data, packetizing the encoded data for each predetermined block, and outputting the encoded data, and a packet sequence multiplexed by another transmission apparatus. A signal separation step for separating a packet sequence of the element data into a packet sequence of the first additional information relating to the element data; and a packet sequence of the first additional information, the second being related to the packetized input data. Generating additional third information by combining the first additional information with the first additional information, packetizing the third additional information and outputting the packet, and a packet of the third additional information. By multiplexing the sequence, a plurality of packet sequences output from the encoding step and the packet sequence of the element data into one packet sequence. Transmission method characterized by comprising a multiplexing step of transmitting by conversion. 11. The transmission method according to claim 10, wherein said input data and said element data comprise video data and / or audio data. 12. The multiplexing step is performed so that a packet identifier added to each packet of the element data is different from a packet identifier added to each packet output from the encoding step. 11. The transmission method according to claim 10, further comprising a packet identifier modification step for modifying the packet identifier.