Video transmission device and its method

• US 6,404,818 B1
• Filed: 01/19/1999
• Issued: 06/11/2002
• Est. Priority Date: 01/20/1998
• Status: Expired due to Fees

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Obikane, Nobuhisa
• Primary Examiner(s): DIEP, NHON THANH
• Application Number:
  US09/234,169
• Time in Patent Office: 1,239 Days
• Field of Search: H04/N.712, 386/125, 386/126, 386/95, 386/109, 375/240.28, 348/500, 348/505, 348/521, 348/545, 348/547, 348/467, 348/466, 348/390, 348/461, 348/423.1, 370/389, 370/401, 370/468, 370/498
• US Class Current: 375/240.28
• CPC Class Codes: H04N 21/23608 Remultiplexing multiplex streams, e.g. involving modifying time stamps or remapping the packet identifiers
• CPC Class Codes: H04N 21/2362 Generation or processing of Service Information [SI]
• CPC Class Codes: H04N 21/242 Synchronization processes, e.g. processing of PCR [Program Clock References] arrangements for synchronising broadcast or distribution via plural systems in broadcast distribution systems H04H20/18
• CPC Class Codes: H04N 21/4305 Synchronising client clock from received content stream, e.g. locking decoder clock with encoder clock, extraction of the PCR packets arrangements for synchronising receiver with transmitter by comparing receiver clock with transmitter clock H04L7/0012; arrangements for synchronising receiver with transmitter wherein the receiver takes measures against momentary loss of synchronisation H04L7/0083
• CPC Class Codes: H04N 21/43072 of multiple content streams on the same device
• CPC Class Codes: H04N 21/4344 Remultiplexing of multiplex streams, e.g. by modifying time stamps or remapping the packet identifiers
• CPC Class Codes: H04N 21/4345 Extraction or processing of SI, e.g. extracting service information from an MPEG stream

Abstract

In a video transmission device, a plurality of video data associated with one program can be transmitted without a complicated processing at the time of reception. In the case of transmitting a plurality of associated video data, first program information to control the plurality of associated video data as one program is formed and transmitted, so that the plurality of video data associated with one program can be transmitted without a complicated processing.

Claims

1. A video transmission device comprising:

a plurality of video encoding means for encoding a plurality of associated video data and for adding different packet identification information to the coded video data respectively to packetize and output them;

program information forming means, in order to control said plurality of associated video data as one program, for forming first program information to show said packet identification information, which are added to said coded video data respectively, per video data and for adding proper packet identification information to the first program information to packetize and output it;

first multiplexing means for multiplexing packets concerning each of video data to be transmitted from said plurality of video encoding means onto packets of said first program information to be transmitted from said program information forming means, and for outputting first transmission data for one program;

second multiplexing means for multiplexing said first transmission data to be transmitted from said first multiplexing means and second transmission data formed of another program onto second program information showing said packet identification information, which is added to said first program information of each program to be transmitted, per program, and for outputting third transmission data; and

transmission means for transmitting said third transmission data to be transmitted from said second multiplexing means through a prescribed circuit.

2. The video transmission device according to claim 1, further comprising

a plurality of audio encoding means for encoding a plurality of associated audio data and for adding different packet identification to the coded audio data respectively to packetize and output them; wherein

said program information forming means, as well as showing said packet identification information, which are added to said coded video data respectively, per video data, forms said first program information showing said packet identification information, which are added to said coded audio data respectively, per audio data.

3. The video transmission device according to claim 1, wherein

said plurality of video encoding means, as well as encoding video data so that coding units synchronize between the video data, applies such an encoding as finishes within the coding unit, to said video data.

4. The video transmission device according to claim 1, wherein

said plurality of video encoding means, as well as adding time information to regulate a processing timing at a decoding side, to each of said coded video data, makes the time information to be equal among the video data.

5. A video transmission method, comprising the steps of:

as well as encoding a plurality of associated video data, adding different packet identification information to the coded video data respectively to packetize them;

in order to control said plurality of associated video data as one program, forming first program information to show said packet identification information, which are added to said coded video data respectively, per video data and adding proper packet identification information to the first program information to packetize it;

forming first transmission data for one program by multiplexing packets concerning said video data onto packets for said first program information; and

forming third transmission data by multiplexing said first transmission data, second transmission data formed of another program onto second program information showing said packet identification information, which is added to said first program information of each program to be transmitted, per program, and transmitting the third transmission data through a prescribed circuit.

6. The video transmission method according to claim 5, wherein:

a plurality of associated audio data is encoded, and different packet identification information are added to coded audio data respectively to packetize the coded audio data; and

said packet identification information, which are added to said coded video data respectively, are showed per video data, and said first program information showing said packet identification information, which are added to said coded audio data respectively, per audio data is formed.

7. The video transmission method according to claim 5, wherein

encoding is applied to video data so that coding units synchronize between the video data, and such an encoding as finishes within the coding unit is applied to said video data to respectively.

8. The video transmission method according to claim 5, wherein

in the case of encoding said video data, time information to regulate a processing timing of a decoding side is added to each of said coded video data, and the time information is to be equal among the video data.