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Quick inter-frame prediction mode selection method for AVS-M video coding

An inter-frame prediction mode and video coding technology, applied in the field of video coding, can solve problems such as reducing coding efficiency, and achieve the effects of reducing the search process, reducing the number of calculations, and improving the coding speed

Inactive Publication Date: 2013-11-06
张新安
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since it needs to be calculated after downsampling and filtering SAD value, reducing the coding efficiency

Method used

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  • Quick inter-frame prediction mode selection method for AVS-M video coding
  • Quick inter-frame prediction mode selection method for AVS-M video coding
  • Quick inter-frame prediction mode selection method for AVS-M video coding

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Embodiment Construction

[0045] The fast inter-frame mode selection algorithm process of the present invention is as attached Figure 4 As shown, the steps of the fast inter-frame mode selection algorithm implemented specifically are as follows.

[0046] Step 1 Detect SKIP, calculate SAD (SKIP).

[0047] step 2 SAD (SKIP) TH , SKIP is the best mode, go to step 7, otherwise, search for 16×16 and 8×8.

[0048] step 3 J modo (SKIP)J modo (16×16), J modo (SKIP)J modo (8×8), SKIP is the best mode, go to step 7, otherwise, search for 4×4.

[0049] step 4 J modo (16×16)> J modo (8×8)> J modo (4×4), search for 8×4 and 4×8, go to step 5, J modo (16×16)J modo (8×8)J modo (4×4), search for 8×4 and 4×8, 16×8 and 8×16, and go to step 5; otherwise, search for 16×8 and 8×16.

[0050] Step 5 Determine the best inter mode.

[0051] step 6 J modo (inter)> T , detect the intra mode and determine the best mode, otherwise, go to step 7.

[0052] Step 7 ends the mode selection process.

[0053] Th...

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Abstract

The invention provides a quick inter-frame prediction mode selection method for AVS-M video coding. Algorithms can be classified according to the distribution situation of inter-frame coding modes and are arranged according to processing priority, different types are judged sequentially, possible modes are compared selectively, and the number of modes to be judged is reduced. Early termination judgment is utilized to carry out priority judgment on an SKIP mode, and whether other modes are early termination is judged through threshold value judgment. If threshold value judgment conditions are met, the SKIP mode is directly utilized to code. If the threshold value judgment conditions are not met, an Inter4*4 mode, an Inter 8*8 mode and an Inter 16*16 mode are used as initial modes. A part of macro block modes are removed according to whether rate-distortion cost meets monotony, and accordingly useless block mode search processes are reduced. Compared with a full-mode selection algorithm, the calculating times is reduced by 52.5% to 85.8%, and the calculating complexity of inter-frame forecasting modules is reduced.

Description

technical field [0001] The invention relates to the technical field of video coding in signal processing, in particular to a fast inter-frame prediction mode selection method for AVS-M video coding. Background technique [0002] The digital audio and video industry is one of the three major components of the information industry. my country's digital audio and video industry has a huge scale, but its intellectual property rights are weak. This field has long been monopolized by foreign technical standards such as MPEG-2, MPEG-4 and H.264. The adoption of these standards requires the payment of high patent fees. In order to reduce the patent fee burden of the domestic audio and video industry and enhance the core competitiveness of domestic enterprises, the Ministry of Information Industry approved the establishment of the "Digital Audio and Video Coding Technology Standard Working Group" in June 2002 to engage in the research and development of digital audio and video coding ...

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Application Information

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IPC IPC(8): H04N7/26H04N7/32
Inventor 张新安
Owner 张新安