CN105208381A - Video coding method and apparatus - Google Patents
Video coding method and apparatus Download PDFInfo
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- CN105208381A CN105208381A CN201410290471.0A CN201410290471A CN105208381A CN 105208381 A CN105208381 A CN 105208381A CN 201410290471 A CN201410290471 A CN 201410290471A CN 105208381 A CN105208381 A CN 105208381A
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- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
Abstract
The invention provides a video coding method and apparatus which are applied to a multi-core video coding environment. The methods includes the following steps that: a first division mode of the last frame of image in a video is detected under the condition that the current frame of image is not the first frame of image in the video; the current frame of image is divided through adopting a second division mode, wherein the second division mode is different from the first division mode; and images which are obtained after the current frame of image is divided are coded. According to the video coding method and apparatus provided by the invention, a dynamic segmenting mode is adopted for each frame of image in the video in a multi-core video coding process, and therefore, the problem of influence on the quality of video coding caused by continuously-accumulated difference effects caused by the constant position of the middle segmenting line of static segmentation in the prior art can be avoided.
Description
Technical field
The present invention relates to technical field of video coding, particularly relate to a kind of method for video coding and device.
Background technology
Along with the development of the Internet, the demand of multimedia service especially Video service be there is to the trend of accelerated growth.Video coding and decoding technology, as the core technology of multimedia application, plays huge effect in the application such as remote monitoring, remote teaching, distance medical diagnosis, teleshopping, long-range visiting, video conference and video telephone.Growing along with to demands such as high image quality video compression transmission, the correlation techniques such as high-performance encoding and decoding become study hotspot.Along with the development of major video compression standard, the contradiction that the monokaryon computing capability of its more and more higher computation complexity and current DSP (DigitalSignalProcessor, digital signal processor) limits is quite outstanding.Along with network multimedia service is to the extensive use of ultrahigh resolution support and high definition image quality Streaming Media, it also constantly increases high performance parallel computation demand, existing monokaryon DSP structure is difficult to the demand meeting calculated performance, is also difficult to the requirement meeting real time codec.The high definition realtime graphic application such as similar video conference then need the high spped coding realized on coenocytism, calculate to realize more massive parallel data.
For realizing real-time coding on multi-core DSP, usually original video data being distributed to the multiple core of processor parallel encoding simultaneously, after having encoded, again collection encapsulation being carried out to coded data.Because horizontal movement in video scene is more common, so carrying out uniform level to frame of video is fixedly divided into multiple part usually in the middle of prior art, then encoded by multiple core respectively.But a problem can be brought like this, example is encoded to double-core, if a two field picture is divided into bottom fields, then encode respectively, so have difference at bottom fields boundary both sides coding parameter, after merging image, visual middle separator bar differential effect can be produced in video playback.Because the static partitioning scheme carried out in multinuclear coding frame of video in prior art is comparatively fixing, cause the central breaks differential effect produced in video can be constantly cumulative, and then affect the quality of Video coding.
Summary of the invention
The technical problem to be solved in the present invention is, provides a kind of method for video coding and device, avoids the differential effect caused due to static central breaks in prior art constantly add up and affect video encoding quality.
The technical solution used in the present invention is, described in, comprising:
First aspect, the invention provides a kind of method for video coding, is applied in multinuclear video coding environment, comprises:
When current frame image is not the first two field picture in video, detect the first dividing mode of previous frame image in described video;
Adopt the second dividing mode to divide to described current frame image, described second dividing mode is different from described first dividing mode;
Image after dividing from described current frame image is encoded.
Further, described second dividing mode is different from described first dividing mode, comprising: division position when dividing for the picture frame in video is different.
Further, described second dividing mode is different from described first dividing mode, also comprises: the number of the subgraph marked off is different.
Further, described first dividing mode and the second dividing mode include: the picture frame in video is divided at least two subgraphs.
Further, described picture frame in video is divided at least two subgraphs, comprises:
Picture frame in described video is divided horizontally at least two subgraphs;
Or, the picture frame in described video is divided vertically at least two subgraphs.
Further, each subgraph size obtained is divided identical.
Second aspect, the present invention also provides a kind of video coding apparatus, comprising:
Detection module, for when current frame image is not the first two field picture in video, detects the first dividing mode of previous frame image in described video;
Divide module, for adopting the second dividing mode to divide to described current frame image, described second dividing mode is different from described first dividing mode;
Coding module, for encoding to the image after division from described current frame image.
Further, described second dividing mode is different from described first dividing mode, comprising: division position when dividing for the picture frame in video is different.
Further, described first dividing mode and the second dividing mode include: the picture frame in video is divided at least two subgraphs.
The third aspect, present invention also offers a kind of Video coding terminal, comprising:
Processor, for when current frame image is not the first two field picture in video, detects the first dividing mode of previous frame image in described video; Adopt the second dividing mode to divide to described current frame image, described second dividing mode is different from described first dividing mode; Image after dividing from described current frame image is encoded.
Adopt technique scheme, the present invention at least has following advantages:
Method for video coding of the present invention and device, in video multinuclear cataloged procedure, dynamic partitioning scheme is adopted to each two field picture in video, and then avoid the problem affecting video encoding quality in prior art because the differential effect of static central breaks is constantly cumulative.
Accompanying drawing explanation
Fig. 1 is the method for video coding method flow diagram of first embodiment of the invention;
Fig. 2 is the schematic diagram that in first embodiment of the invention, two field picture divides;
Fig. 3 is the schematic diagram of two field picture horizontal division in first embodiment of the invention;
Fig. 4 is the schematic diagram of two field picture vertical division in first embodiment of the invention;
Fig. 5 is video coding apparatus schematic diagram in second embodiment of the invention;
Fig. 6 is Video coding terminal schematic diagram in third embodiment of the invention.
Embodiment
For further setting forth the present invention for the technological means reaching predetermined object and take and effect, below in conjunction with accompanying drawing and preferred embodiment, the present invention is described in detail as after.
First embodiment of the invention, a kind of method for video coding, is applied in multinuclear video coding environment, as shown in Figure 1, comprises following concrete steps:
Step S101, when current frame image is not the first two field picture in video, detects the first dividing mode of previous frame image in video.
Concrete, whether first two field picture that current needs in video carry out encoding is judged as IDR (InstantaneousDecodingRefresh, decoding refreshes immediately) frame, due to the first two field picture that every IDR frame in the middle of screen is in video, if so detect that current frame image is every IDR frame, the first two field picture so namely in video.If detect that current frame image is not every IDR frame, so detect the image dividing mode in previous frame Image Coding, i.e. the first dividing mode.
Step S102, adopts the second dividing mode to divide to current frame image, and the second dividing mode is different from described first dividing mode.
Concrete, when after previous frame image dividing mode current frame image in video being detected, current frame image in video is divided, i.e. the second dividing mode.Wherein, second dividing mode is different from the first dividing mode, make two field picture dividing mode adjacent in video different, like this by the position of the every frame central breaks of two field picture in dynamic adjustment video, after making, the central breaks of a two field picture does not overlap with the central breaks of previous frame image, avoid identical dividing mode is all adopted to each two field picture in video and occur central breaks superposition phenomenon, ensure that the quality of video.
When current frame image is not every IDR frame, if definition every IDR frame is the 0th frame, so can also detect the current frame pitch needing two field picture and the every IDR frame of encoding, if frame pitch is even number, the so current two field picture of coding that needs can adopt the dividing mode identical with every IDR frame.Need if current the two field picture of coding and the frame pitch of every IDR frame to be odd number, the dividing mode different from every IDR frame image can be adopted, even if current frame image is adjacent with every IDR frame image like this, current frame image also can not be made identical with the dividing mode of every IDR frame image.Adopt the current frame pitch odd even mode needing two field picture and the every IDR frame of encoding, even if only adopt the dividing mode of two kinds of two field pictures, also the situation that in video, adjacent two two field picture dividing mode are identical can be avoided, certainly, the dividing mode of two field picture is more, more can avoid all adopting identical dividing mode to each two field picture in video and occur central breaks superposition phenomenon.In addition, the frame number frame_num that the present invention can also join according to two field picture coded time division in video selects the dividing mode adopted needed for each two field picture.Wherein, the frame_num value of every IDR frame is 0, and the frame_num value of follow-up two field picture is the frame pitch with IDR, like this can be autotelic to needing the two field picture of encoding to carry out selection two field picture dividing mode in video.
Further, in the dividing mode to two field picture in video, the two field picture of various ways to coding can be adopted to divide, as: horizontal division mode and vertical division mode.
Fig. 2 gives the schematic diagram that in first embodiment of the invention, two field picture divides.
As shown in Figure 2, the two field picture in video is divided into 4 parts, obtains 4 subgraphs: sheet 0, sheet 1, sheet 2 and sheet 3.Parallel encoding process while that DSP1, DSP2, DSP3 and DSP4 carrying out is given respectively by sheet 0, sheet 1, sheet 2 and sheet 3.
Fig. 3 is the schematic diagram of two field picture horizontal division in first embodiment of the invention.
As shown in Figure 3, in Fig. 3, give continuous print three two field pictures, as figure regards current frame image as the 2j two field picture of centre, so first check the dividing mode of previous frame image in video, namely detect the dividing mode of the 2j-1 two field picture in Fig. 3.The mode that all have employed horizontal division due to current frame image and previous frame image divides two field picture, therefore, can by the number of division subgraph of adjustment current frame image or the difference of size, avoid making the concrete dividing mode of current frame image identical with the concrete dividing mode of previous frame image, so also just can avoid and make current frame image produce the identical problem in central breaks position when dividing with previous frame image.In like manner, the concrete dividing mode identical with current frame image to be avoided when concrete division being carried out to next frame image.
As can be seen from Figure 3, two field picture dividing mode adjacent in video image is different, and its object is exactly the position difference of the central breaks that adjacent two field picture is produced.Central breaks as produced in 2j-1 two field picture in Fig. 3 is L1, L2 ... central breaks L1, L2 of producing in the position of Ln-1 and 2j two field picture ... the position of Ln-1 is different.In like manner, Fig. 4 is the method for image vertical division in first embodiment of the invention, the central breaks position that two field picture adjacent in Fig. 4 is produced is different, and the central breaks as produced in 2j-1 two field picture in Fig. 4 is L1, L2 ... central breaks L1, L2 of producing in the position of Ln-1 and 2j two field picture ... the position of Ln-1 is different.
In addition, it should be noted that, in the embodiment of the present invention, horizontal division and vertical division are not limited to the dividing mode of video frame images coding, other dividing mode can also be adopted in other embodiments.
Step S103, encodes to the image after dividing from current frame image.
Concrete, composition graphs 2, two field picture in video is divided into 4 subgraphs by the present invention, then these 4 subgraphs divided out are given respectively 4 DSP cores and carry out parallel coded treatment simultaneously, method of the present invention is adopted to reconsolidate as video image by after two field picture coded treatment all in frame of video, the central breaks position produced owing to being divided into different subgraphs due to adjacent video frame images is different, so can not cause the reduction of video encoding quality in video display process because of the superposition of the central breaks of adjacent two field picture.
In addition, when present frame is the first two field picture in described video, do not detect the dividing mode of other two field picture, directly described current frame image is divided.Because current frame image is the first two field picture in video, also be the first two field picture needing to carry out coded treatment, because other two field pictures below also do not carry out coded treatment, also just the division of two field picture is not carried out, therefore, only need directly to carry out division according to above-mentioned a kind of two field picture division to current frame image to current frame image to encode.Second embodiment of the invention, as shown in Figure 5, a kind of video coding apparatus shows, comprising:
Detection module 10, for when current frame image is not the first two field picture in video, detects the first dividing mode of previous frame image in video.
Concrete, whether two field picture that current needs in video carry out encoding first is judged as every IDR frame, because every IDR frame in the middle of screen is the first two field picture in video, if so detect that current frame image is every IDR frame, the first two field picture so namely in video.If detect that current frame image is not every IDR frame, so detection module 10 detects the image dividing mode in previous frame Image Coding, i.e. the first dividing mode.
Divide module 20, for adopting the second dividing mode to divide to current frame image, the second dividing mode is different from the first dividing mode.
Concrete, after detection module 10 detects the previous frame image dividing mode of current frame image in video, divide current frame image in module 20 pairs of videos and divide, be i.e. the second dividing mode.Wherein, second dividing mode is different from the first dividing mode, make two field picture dividing mode adjacent in video different, like this by the position of the every frame central breaks of two field picture in dynamic adjustment video, after making, the central breaks of a two field picture does not overlap with the central breaks of previous frame image, avoid identical dividing mode is all adopted to each two field picture in video and occur central breaks superposition phenomenon, ensure that the quality of video.
When current frame image is not every IDR frame, if definition every IDR frame is the 0th frame, so can also detect the current frame pitch needing two field picture and the every IDR frame of encoding, if frame pitch is even number, the so current two field picture of coding that needs can adopt the dividing mode identical with every IDR frame.Need if current the two field picture of coding and the frame pitch of every IDR frame to be odd number, the dividing mode different from every IDR frame image can be adopted, even if current frame image is adjacent with every IDR frame image like this, current frame image also can not be made identical with the dividing mode of every IDR frame image.Adopt the current frame pitch odd even mode needing two field picture and the every IDR frame of encoding, even if only adopt the dividing mode of two kinds of two field pictures, also the situation that in video, adjacent two two field picture dividing mode are identical can be avoided, certainly, the dividing mode of two field picture is more, more can avoid all adopting identical dividing mode to each two field picture in video and occur central breaks superposition phenomenon.In addition, the frame number frame_num that the present invention can also join according to two field picture coded time division in video selects the dividing mode adopted needed for each two field picture.Wherein, the frame_num value of every IDR frame is 0, and the frame_num value of follow-up two field picture is the frame pitch with IDR, like this can be autotelic to needing the two field picture of encoding to carry out selection two field picture dividing mode in video.
Further, in the dividing mode to two field picture in video, the two field picture of various ways to coding can be adopted to divide, as: horizontal division mode and vertical division mode, specifically see Fig. 3 and Fig. 4.
Coding module 30, for encoding to the image after division from current frame image.
Concrete, composition graphs 2, is divided into 4 parts by the two field picture in video, obtain 4 subgraphs: sheet 0, sheet 1, sheet 2 and sheet 3.Parallel encoding process while that DSP1, DSP2, DSP3 and DSP4 carrying out is given respectively by sheet 0, sheet 1, sheet 2 and sheet 3.
Third embodiment of the invention, as shown in Figure 6, a kind of Video coding terminal, comprising:
Processor 40, for when current frame image is not the first two field picture in video, detects the first dividing mode of previous frame image in video; Adopt the second dividing mode to divide to current frame image, the second dividing mode is different from described first dividing mode; Image after dividing from current frame image is encoded.
Concrete, whether two field picture that current needs in video carry out encoding first is judged as every IDR frame, because every IDR frame in the middle of screen is the first two field picture in video, if so detect that current frame image is every IDR frame, the first two field picture so namely in video.If detect that current frame image is not every IDR frame, so detect the image dividing mode in previous frame Image Coding, i.e. the first dividing mode.
When after previous frame image dividing mode current frame image in video being detected, current frame image in video is divided, i.e. the second dividing mode.Wherein, second dividing mode is different from the first dividing mode, make two field picture dividing mode adjacent in video different, like this by the position of the every frame central breaks of two field picture in dynamic adjustment video, after making, the central breaks of a two field picture does not overlap with the central breaks of previous frame image, avoid identical dividing mode is all adopted to each two field picture in video and occur central breaks superposition phenomenon, ensure that the quality of video.
Application Example of the present invention:
This application example employing model is that 4 cores of TCI6678 complete the video data encoding that form is 1080, type of coding is IPPPPP, choose resolution sizes be " 1080P_ example .yuv " sequence of 1920 × 1080 as cycle tests, in conjunction with above-mentioned Fig. 1 ~ Fig. 4, concrete implementation step is as follows:
Step 1, judge whether current encoded frame is every IDR frame or even frame, whether is namely 2j frame, if it is proceeds to step 2, if be false, proceed to step 3.
Step 2, the 2j two field picture of " 1080P_ example .yuv " sequence is spatially divided into 4 sheets, transfer to DSP0, DSP1, DSP2, DSP3 tetra-cores codings respectively, every picture size is identical.
Step 3, be reclassified as 4 sheets by the basis of the 2j+1 two field picture step 2 of " 1080P_ example .yuv " sequence, horizontal division line all moves down a macro-block line, and is encoded, see Fig. 2 by four DSP cores respectively.
Step 4, return step 1, continue next frame coding.
It is pointed out that in all embodiments of the present invention, the two field picture in video and identical concept that picture frame refers to, and known by those skilled in the art.
In sum, method for video coding provided by the invention and device, in video multinuclear cataloged procedure, dynamic partitioning scheme is adopted to each two field picture in video, and then avoid the problem affecting video encoding quality in prior art because the differential effect of static central breaks is constantly cumulative, better video image quality can be obtained.
By the explanation of embodiment, should to the present invention for the technological means reaching predetermined object and take and effect be able to more deeply and concrete understanding, but appended diagram be only to provide with reference to and the use of explanation, be not used for being limited the present invention.
Claims (10)
1. a method for video coding, is applied in multinuclear video coding environment, it is characterized in that, comprising:
When current frame image is not the first two field picture in video, detect the first dividing mode of previous frame image in described video;
Adopt the second dividing mode to divide to described current frame image, described second dividing mode is different from described first dividing mode;
Image after dividing from described current frame image is encoded.
2. method for video coding according to claim 1, is characterized in that,
Described second dividing mode is different from described first dividing mode, comprising: division position when dividing for the picture frame in video is different.
3. method for video coding according to claim 2, is characterized in that, described second dividing mode is different from described first dividing mode, also comprises: the number of the subgraph marked off is different.
4. method for video coding according to claim 1, is characterized in that, described first dividing mode and the second dividing mode include: the picture frame in video is divided at least two subgraphs.
5. according to claim 4, it is characterized in that, described picture frame in video is divided at least two subgraphs, comprising:
Picture frame in described video is divided horizontally at least two subgraphs;
Or, the picture frame in described video is divided vertically at least two subgraphs.
6. the method for video coding according to claim 4 or 5, is characterized in that, divides each subgraph size obtained identical.
7. a video coding apparatus, is characterized in that, comprising:
Detection module, for when current frame image is not the first two field picture in video, detects the first dividing mode of previous frame image in described video;
Divide module, for adopting the second dividing mode to divide to described current frame image, described second dividing mode is different from described first dividing mode;
Coding module, for encoding to the image after division from described current frame image.
8. video coding apparatus according to claim 7, is characterized in that,
Described second dividing mode is different from described first dividing mode, comprising: division position when dividing for the picture frame in video is different.
9. method for video coding according to claim 1, is characterized in that, described first dividing mode and the second dividing mode include: the picture frame in video is divided at least two subgraphs.
10. a Video coding terminal, is characterized in that, comprising:
Processor, for when current frame image is not the first two field picture in video, detects the first dividing mode of previous frame image in described video; Adopt the second dividing mode to divide to described current frame image, described second dividing mode is different from described first dividing mode; Image after dividing from described current frame image is encoded.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410290471.0A CN105208381A (en) | 2014-06-25 | 2014-06-25 | Video coding method and apparatus |
| PCT/CN2014/091932 WO2015196718A1 (en) | 2014-06-25 | 2014-11-21 | Video encoding method and device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410290471.0A CN105208381A (en) | 2014-06-25 | 2014-06-25 | Video coding method and apparatus |
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| CN105208381A true CN105208381A (en) | 2015-12-30 |
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| WO (1) | WO2015196718A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109146916A (en) * | 2018-08-22 | 2019-01-04 | 浙江大华技术股份有限公司 | A kind of moving body track method and device |
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| US20080075172A1 (en) * | 2006-09-25 | 2008-03-27 | Kabushiki Kaisha Toshiba | Motion picture encoding apparatus and method |
| CN101267564A (en) * | 2008-04-16 | 2008-09-17 | 中国科学院计算技术研究所 | A multi-processor video coding chip device and method |
| CN101282478A (en) * | 2008-04-24 | 2008-10-08 | 上海华平信息技术股份有限公司 | Method and system for implementing parallel encoding of high-definition video |
| CN102215395A (en) * | 2010-04-09 | 2011-10-12 | 华为技术有限公司 | Video coding and decoding method and device |
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| CN101583041B (en) * | 2009-06-18 | 2012-03-07 | 中兴通讯股份有限公司 | Image filtering method of multi-core image encoding processing equipment and equipment |
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2014
- 2014-06-25 CN CN201410290471.0A patent/CN105208381A/en not_active Withdrawn
- 2014-11-21 WO PCT/CN2014/091932 patent/WO2015196718A1/en active Application Filing
Patent Citations (4)
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| US20080075172A1 (en) * | 2006-09-25 | 2008-03-27 | Kabushiki Kaisha Toshiba | Motion picture encoding apparatus and method |
| CN101267564A (en) * | 2008-04-16 | 2008-09-17 | 中国科学院计算技术研究所 | A multi-processor video coding chip device and method |
| CN101282478A (en) * | 2008-04-24 | 2008-10-08 | 上海华平信息技术股份有限公司 | Method and system for implementing parallel encoding of high-definition video |
| CN102215395A (en) * | 2010-04-09 | 2011-10-12 | 华为技术有限公司 | Video coding and decoding method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109146916A (en) * | 2018-08-22 | 2019-01-04 | 浙江大华技术股份有限公司 | A kind of moving body track method and device |
| CN109146916B (en) * | 2018-08-22 | 2021-02-02 | 浙江大华技术股份有限公司 | Moving object tracking method and device |
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Application publication date: 20151230 |