CN1058361C - Method of using high clarity television codes flow for transmitting multiroute standard clarity television program - Google Patents
Method of using high clarity television codes flow for transmitting multiroute standard clarity television program Download PDFInfo
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- CN1058361C CN1058361C CN98117844A CN98117844A CN1058361C CN 1058361 C CN1058361 C CN 1058361C CN 98117844 A CN98117844 A CN 98117844A CN 98117844 A CN98117844 A CN 98117844A CN 1058361 C CN1058361 C CN 1058361C
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- sdtv
- code stream
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Abstract
The present invention relates to a method for transferring multi-channel television programs by using digital code streams of a digital television, particularly to a method for transferring multi-channel standard definition television programs by using digital code streams of a digital television. The method is characterized in that N channels of SDTV video signals are respectively and correspondingly inputted to N SDTV encoders to form SDTV code streams, N channels of SDTV code streams form HDTV code streams by a code stream synthesizer; the HDTV code streams are sent to the receiving end, are restored into the N channels of SDTVcode streams by a code stream resolver, and then, are restored into the original SDTV video signals by a decoder. The present invention proposes a method for transferring multi-channel television programs, and the method has the advantage of reasonable and reliable structure.
Description
The invention belongs to the method for digital television code stream transmission multi-channel tv programs.
Current general digital high-definition television video coding adopts the MPEG-2 technology, and it is by the ISO/IEC13818 files specify.Wherein multiplexing part has been stipulated the multiplexing of speech and video, has also stipulated the multiplexing of Polymera.Transmission to multi-channel program can be used the multi program multiplex device.
High definition TV (to call HDTV in the following text) video coding adopts the MPEG-2 technology, and it is an international standard, this standard code the code stream compiled out of video encoder the syntax gauge that must observe.This comprises basic stream (ES), transmits stream (TS) and program stream (PS), at high definition TV and standard definition television (to call SDTV in the following text)) all be suitable for.
The objective of the invention is method, and transmit without the multi program multiplex device with single HDTV codes flow for transmitting multiroute SDTV program.
The object of the present invention is achieved like this.Introduce the MPEG-2 technology earlier, the MPEG-2 technology is based upon on the macroblock basis, and the last layer of macro block is bar (slice), and last layer is image (picture) again, and last layer is image sets (Gop) again, and last layer is sequence (seguence) again.
The upright position that has comprised this bar in the header of each bar has then comprised the horizontal level of this bar in first macro block header of each bar, determined this bar physical location in the drawings thus.One width of cloth HDTV picture is divided into a plurality of SDTV pictures.At this moment, each SDTV picture then is known in the position of HDTV picture.Bar way address among each SDTV is a bar of HDTV picture, thereby constitutes a HDTV code stream.
The specific implementation method is as follows:
In the code stream of multichannel (N road) SDTV, only keep wherein one tunnel sequence head, image sets head, picture header information, the above-mentioned header on all the other each roads discards entirely.The header on this road that keeps is the grammatical norm that will meet MPEG-2.The information of relevant SDTV is changed into the information of HDTV.For example the size of video buffer verifier (vbv-buffer-size) is got the summation on each road, and maximum or the like is got in the delay of video buffer verifier (vbv-deleay).
At transmitting terminal, to bar address and this first macroblock address of each road SDTV, make multichannel SDTV picture constitute the picture of a HDTV according to its position correct in HDTV, promptly form the single HDTV code stream that meets the MPEG-2 standard.
At receiving terminal,, can obtain multichannel SDTV program with the said process inverse operation.
The present invention is further described below in conjunction with embodiment and accompanying drawing.
The block diagram of Fig. 1, usefulness of the present invention one road HDTV codes flow for transmitting multiroute SDTV program.
Fig. 2, embodiment 1, it is 4 SDTV pictures that a HDTV picture is divided equally.
Fig. 3, embodiment 2 are divided into 4 SDTV pictures with a HDTV picture, still stay part vacant.
The present invention is a kind of method with the high definition television codes flow for transmitting multiroute standard clarity television program, it is characterized in that being finished by following steps:
1. N road SDTV vision signal respectively correspondence input to N SDTV encoder, form N road SDTV code stream;
2. SDTV code stream in N road forms the HDTV code stream by the code stream synthesizer;
3. the HDTV code stream is delivered to the code stream decomposer of receiving terminal, reverts to N road SDTV code stream;
4. every road SDTV code stream by individual SDTV decoder certainly, reverts to former SDTV vision signal with the SDTV code stream again, promptly obtains N road SDTV vision signal.Wherein the N value is 4-6.
Referring to Fig. 1, it is to be that 1440 * 1152/25/2: 1 HDTV code stream transmits four the tunnel 720 * 576/25/2 with one tunnel resolution: the device of 1 SDTV code stream, it can transmit 4 road SDTV programs.This device is made up of 4 SDTV encoders, a code stream synthesizer, a code stream decomposer and 4 SDTV decoders, 4 tunnel vision signals input to SDTV encoder separately respectively, form 4 road SDTV code streams, the SDTV code stream is by the code stream synthesizer, form the HDTV code stream, the HDTV code stream is delivered to the code stream decomposer of receiving terminal, reverts to 4 road SDTV code streams, the SDTV code stream by the SDTV decoder, reverts to original video signal with the SDTV code stream again.
Referring to Fig. 2, be that the method that one 1440 * 1152 HDTV picture is divided with cross is divided equally is four SDTV pictures, promptly transmit 4 road SDTV programs.Each road SDTV compiles out a code stream that meets MPEG-2, main profile at main level, through the code stream synthesizer it is synthesized a HDTV code stream that meets MPEG-2, MP@HL-1440 * 1152 again, at receiving terminal the HDTV code stream is carried out the inverse process operation, can obtain 4 road SDTV programs.
Referring to Fig. 3, be with one 1920 * 1152/50/2: 1 HDTV picture is divided into 4 SDTV, and (720 * 576/50/2: 1) picture, redundance are done zero filling and are handled.Realize equally that with above-mentioned method single HDTV code stream transmits four road SDTV programs.
The present invention has changed with multi program multiplex device transmission multi-channel tv programs, adopts the method for single HDTV codes flow for transmitting multiroute SDTV program.This method realizes with hardware.
Claims (3)
1, with the method for high clarity television codes flow for transmitting multiroute standard clarity television program, it is characterized in that finishing by following steps:
1. N road SDTV vision signal respectively correspondence input to N SDTV encoder, form N road SDTV code stream;
2. SDTV code stream in N road forms the HDTV code stream by the code stream synthesizer;
3. the HDTV code stream is delivered to the code stream decomposer of receiving terminal, reverts to N road SDTV code stream;
4. every road SDTV code stream by individual SDTV decoder certainly, reverts to former SDTV vision signal with the SDTV code stream again, promptly obtains N road SDTV vision signal.
2, by the described method of claim 1, it is characterized in that the N value is 4～6 with high clarity television codes flow for transmitting multiroute standard clarity television program.
3, by the described method of claim 1 with high clarity television codes flow for transmitting multiroute standard clarity television program, it is characterized in that in the code stream of N road SDTV, only keep wherein one tunnel sequence head, group of picture head, visual header, the above-mentioned header on all the other each roads discards entirely; Making a start, will be to bar address and this first macroblock address of each road SDTV according to its position correct in HDTV.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98117844A CN1058361C (en) | 1998-08-28 | 1998-08-28 | Method of using high clarity television codes flow for transmitting multiroute standard clarity television program |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98117844A CN1058361C (en) | 1998-08-28 | 1998-08-28 | Method of using high clarity television codes flow for transmitting multiroute standard clarity television program |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1213932A CN1213932A (en) | 1999-04-14 |
| CN1058361C true CN1058361C (en) | 2000-11-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98117844A Expired - Fee Related CN1058361C (en) | 1998-08-28 | 1998-08-28 | Method of using high clarity television codes flow for transmitting multiroute standard clarity television program |
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| Country | Link |
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| CN (1) | CN1058361C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100456837C (en) * | 2004-04-13 | 2009-01-28 | 索尼株式会社 | Data transmitting apparatus and data receiving apparatus |
| CN101277461B (en) * | 2007-03-27 | 2011-05-04 | 展讯通信（上海）有限公司 | Method and system for simultaneously transmitting high-low code flow in TD-SCDMA system |
| CN102801979A (en) * | 2012-08-09 | 2012-11-28 | 武汉微创光电股份有限公司 | Multi-channel video hybrid coding method and device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1168053A (en) * | 1997-01-30 | 1997-12-17 | 广播电影电视部广播科学研究院电视研究所 | System for transmission of high distinctness TV by use of existing digital broadcast equipment |
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1998
- 1998-08-28 CN CN98117844A patent/CN1058361C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1168053A (en) * | 1997-01-30 | 1997-12-17 | 广播电影电视部广播科学研究院电视研究所 | System for transmission of high distinctness TV by use of existing digital broadcast equipment |
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| Publication number | Publication date |
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| CN1213932A (en) | 1999-04-14 |
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Granted publication date: 20001108 Termination date: 20130828 |