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Method for judging SKIP mode ahead of time via HEVC based on motion vector analysis

A technology of motion vectors and patterns, applied in digital video signal modification, electrical components, image communication, etc., can solve the problems of large time consumption, too many times, and long time consumption, achieve remarkable results, reduce encoding time, principle and implementation simple effect

Inactive Publication Date: 2018-10-09
CAPITAL NORMAL UNIVERSITY
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Problems solved by technology

[0005] (1) Calculating the rate-distortion cost (RD cost) function itself takes a long time
[0006] (2) Calculate the rate-distortion cost (rate-distortion cost, RD cost) too many times
[0013] It can be seen from the steps that when the HM encoder performs inter-frame prediction mode selection, the call to the function of rate-distortion cost calculation is very frequent, so it will consume a lot of time

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  • Method for judging SKIP mode ahead of time via HEVC based on motion vector analysis
  • Method for judging SKIP mode ahead of time via HEVC based on motion vector analysis

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Embodiment Construction

[0028] The specific flow of a method for HEVC judging SKIP mode in advance based on motion vector analysis in the present invention is as follows: figure 1 shown. combine figure 1 Describe in detail the specific implementation of a method of HEVC judging SKIP mode in advance based on motion vector analysis of the present invention in HM encoder (HEVC standard test software) as follows:

[0029] (1) In the function (xcompressCU) that encodes a coding unit (CU), set the Boolean variable earlyDetectionSkipMode that marks whether to calculate the rate-distortion cost of other modes. The initial value is set to false, that is, the rate-distortion of other modes is required Cost calculation. Other modes refer to non-SKIP modes.

[0030] (2) Determine whether the entire encoding process uses the method of judging the SKIP mode in advance, if not used, then jump to step 8, if used, then go to step 3;

[0031] (3) First calculate the SKIP mode J skip ;

[0032] (4) Calculate the ...

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Abstract

The invention provides a method for judging SKIP mode ahead of time via HEVC based on motion vector analysis and belongs to the technical field of high-definition digital video compression coding anddecoding. The relationship of motion vector of a current coding unit (coding unit, CU) with an adjacent coding unit is analyzed, and the optimal mode of interframe prediction of the coding unit is judged to be the SKIP mode ahead of time, thereby saving time consumption generated by performing rate distortion cost (rate-distortion cost, RD cost) calculation of other modes. Compared with the conventional method for judging SKIP mode ahead of time, the method and principle in the invention are easy to implement and remarkable in effect, and effectively reduce the coding time in the case that thereduction of the video coding quality is minimized.

Description

technical field [0001] The invention belongs to the technical field of high-definition digital video compression encoding and decoding, and in particular relates to a method for early judgment of SKIP mode based on HEVC (High Efficiency Video Coding) based on motion vector analysis. Background technique [0002] As today's digital video continues to develop towards higher definition, frame rate and compression rate, HEVC meets these needs. JCT-VC, an organization jointly established by the International Telecommunication Organization (ITU-T) and the Moving Picture Experts Group (MPEG), propose. Compared with the previous generation of encoding technology AVC, HEVC usually greatly improves the video compression rate, but often consumes more encoding time. [0003] Especially in the mode selection part of inter-frame coding, the basic structure of the method adopted by HEVC and AVC has not changed, and the method of choosing the optimal mode after trying the rate-distortion c...

Claims

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Application Information

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IPC IPC(8): H04N19/139H04N19/147H04N19/159H04N19/42H04N19/44H04N19/70
CPCH04N19/139H04N19/147H04N19/159H04N19/42H04N19/44H04N19/70
Inventor 苏佳孙畅关永施智平吴立峰
Owner CAPITAL NORMAL UNIVERSITY