CN101588495A - Video coding method and system for alternating colors and gray scales - Google Patents
Video coding method and system for alternating colors and gray scales Download PDFInfo
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- CN101588495A CN101588495A CN 200810037646 CN200810037646A CN101588495A CN 101588495 A CN101588495 A CN 101588495A CN 200810037646 CN200810037646 CN 200810037646 CN 200810037646 A CN200810037646 A CN 200810037646A CN 101588495 A CN101588495 A CN 101588495A
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Abstract
The invention relates to a video coding method and a system for alternating colors and gray scales. The colors of a frame I are coded, and the gray scales of a frame P and a frame B are coded. A user wanting to acknowledge the color information of a certain content of a video can possibly obtain the color information by the frame I so that contents transmitted by a communication system in a very limited bandwidth have more practical values.
Description
Affiliated technical field
The present invention relates to a kind of method for video coding and system,,, carry out coding colored and that gray scale replaces in order to control encoder bit rate to color video.
Background technology
In some video communication practical applications, communication bandwidth and memory space are very limited, the compression bit rate of trying one's best under the prerequisite that guarantees picture quality.Present general method for video coding, international standard MPEG4 (ISO/IEC 14496-2) for example, H.264 (ISO/IEC 14496-10, ITU-T Recommendation H.264), China standard A VS (GB/T 20090) or the like, in the time of the coding color video, generally transfer grey scale signal earlier to or get its luminance component, carry out gray-coded again.Though compressed code check, lost colour signal.
Summary of the invention
In order to overcome existing video communication system coloured image is carried out the deficiency that gray-coded is lost colour signal, the invention provides a kind of improved coding method, with colour signal and grey scale signal alternate coded, the content that allows communication system transmit in very limited bandwidth has practical value more.
The technical solution adopted for the present invention to solve the technical problems is: at coded portion, to I frame (non-predictive frames), carry out coloud coding, for P frame (preceding phase predictive frame) and B frame (bi-directional predicted frames), carry out gray-coded.In decoded portion, decode according to different frame types.Play part in video output, play with different frame types according to being provided with.
The invention has the beneficial effects as follows, in the video monitoring class is used, the user only need monitor image gray in the time of most, but need to understand the colouring information of certain content in the video once in a while again really, for example need check that for criminal investigation and case detection the user can have an opportunity to get access to real coloured image by the I frame to monitoring video.The today that spreads all over supervisory control system in the city, practical value height of the present invention is saved system costs such as bandwidth and memory space greatly than coloud coding, more can guarantee the practical function of system's operation than gray-coded.
Description of drawings
Fig. 1 is the encoder logic structural representation.For frame video image input, at first judge whether encoded predicted frame, adopt coloud coding for the I frame, the P/B frame adopts gray-coded.
Embodiment
To realize the coloud coding of I frame, the gray-coded of P/B frame in video coding part.Frame video image for input judges whether that the method for predictive frame is identical with original implementation method.According to judged result, the I frame is carried out coloud coding, for the P/B frame, carry out gray-coded, if input is a yuv format, the Y component of then only encoding if input is a rgb format, then converts gray component earlier to, gray component is encoded again.In decoded portion, realize the colour decoding of I frame, the grey level decoding of P/B frame.Run into the I frame and carry out colour decoding, run into the P/B frame and carry out gray-coded.Behind the P/B frame grey level decoding, can utilize the motion vector that obtains in the grey level decoding to carry out to the chrominance component motion compensation, produce " puppet " chrominance component, its method is identical with the original color coding/decoding method, just original color component motion vector is replaced by the gray component motion vector, i.e. color difference components UV component or cry the motion vector replacement of the motion vector of CbCr component by luminance component Y in the YUV colour signal.Play part in video output, three kinds of settings can be arranged, one, gray scale plays, two, half color broadcast the, three, full-color broadcast.In the gray scale play mode, no matter frame type, only decoding and broadcast gray component.In half color play mode, chance I frame is decoded and is play chrominance component, meets the P/B frame decoding and plays gray component.At full color mode, chance I frame is decoded and is play chrominance component, meets P/B frame decoding gray component and pseudo color component, plays colour signal.Especially, possess positioning function in the playing function, can locate certain I frame by the user, the chrominance component of decoder decode and this I frame of broadcast allows the user watch the image of true coloud coding, obtains true colour information.
Claims (4)
1. method for video coding and system.It is characterized in that: to color video, the I frame is carried out coloud coding,, carry out gray-coded for P frame and B frame.In decoded portion, decode according to different frame types.Play part in video output, according to the setting broadcast of decoding.
2. system according to claim 1 is characterized in that: realize simultaneously in the coding that colour and gray-coded, logical construction have two branches, carry out colour and gray-coded respectively.The I frame of coding keeps colour signal, and P frame and B frame keep grey scale signal.
3. system according to claim 1 is characterized in that: realize simultaneously in the decoding that colour and gray-coded, logical construction have two branches, carry out colour and grey level decoding respectively.The I frame of decoding obtains colour signal, and P frame and B frame obtain grey scale signal and pseudo color signal.
4. system according to claim 1 is characterized in that: player can have three kinds of settings, and one, gray scale plays, two, half color broadcast the, three, full-color broadcast.Respectively corresponding one, full grey level decoding gray scale is play, and two, I frame colour decoding is colored plays, P frame and B frame grey level decoding gray scale are play, and three, I frame colour decoding is colored plays P frame and B frame grey level decoding and pseudo color decoding, the colored broadcast.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810037646 CN101588495A (en) | 2008-05-20 | 2008-05-20 | Video coding method and system for alternating colors and gray scales |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 200810037646 CN101588495A (en) | 2008-05-20 | 2008-05-20 | Video coding method and system for alternating colors and gray scales |
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| CN101588495A true CN101588495A (en) | 2009-11-25 |
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| CN 200810037646 Pending CN101588495A (en) | 2008-05-20 | 2008-05-20 | Video coding method and system for alternating colors and gray scales |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013185707A1 (en) * | 2012-08-29 | 2013-12-19 | 中兴通讯股份有限公司 | Video encoding and decoding method, device, and system |
| CN111866513A (en) * | 2019-04-25 | 2020-10-30 | 瑞昱半导体股份有限公司 | Image compression method and image compressor |
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2008
- 2008-05-20 CN CN 200810037646 patent/CN101588495A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013185707A1 (en) * | 2012-08-29 | 2013-12-19 | 中兴通讯股份有限公司 | Video encoding and decoding method, device, and system |
| US10104400B2 (en) | 2012-08-29 | 2018-10-16 | Zte Corporation | Video encoding and decoding method, device, and system |
| CN111866513A (en) * | 2019-04-25 | 2020-10-30 | 瑞昱半导体股份有限公司 | Image compression method and image compressor |
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Open date: 20091125 |