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Interframe coding quick mode selection method

A coding mode and mode selection technology, applied in the field of video coding, can solve problems such as increased coding complexity, and achieve the effect of reducing coding complexity

Active Publication Date: 2015-06-24
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This makes the coding complexity greatly increased compared to previous video coding standards.

Method used

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  • Interframe coding quick mode selection method
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  • Interframe coding quick mode selection method

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Experimental program
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Embodiment

[0037] The following combined process Figure 4 , taking the implementation on the AVS reference software as an example, the implementation of the present invention is introduced in detail.

[0038] S1. Divide the frame data in the video into multiple macroblocks, and initialize the rate-distortion cost of each module to be the largest.

[0039] S2. If it is a non-I frame, perform prediction in skip mode and motion estimation in inter-frame 16×16 mode.

[0040] S3, S4, respectively calculate the skip mode and inter-frame 16×16 mode rate-distortion cost J skip and J inter16×16 .

[0041] S5, compare J skip and J inter16×16 , if J skip less than J inter16×16 , then skip the prediction of other remaining modes and the calculation of the rate-distortion cost, and skip to S15 , otherwise, skip to S6 .

[0042] S6. Perform motion estimation on the inter-frame 16×8 and 8×16 modes to obtain residual data blocks;

[0043] S7. Calculate the rate-distortion cost J of the inter-f...

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Abstract

The invention provides an interframe coding quick mode selection method in video coding. The interframe coding quick mode selection method comprises the steps of dividing coding modes into a plurality of subsets according to coding modules in descending order and in sequence from intra-frame to interframe at coding time; sequentially calculating mode coding prices according to the coding modules in descending order and in sequence from interframe to intra-frame; and according to relativity between coding modes, skipping a back mode subset if a front coding mode subset is little in coding price, otherwise, continuing back coding subset coding price comparison if the front coding mode subset is not little in coding price. The interframe coding quick mode selection method can be used to reduce complexity of the video coding and reduce coding time.

Description

technical field [0001] The invention relates to the technical field of video coding, in particular to a fast mode selection method for inter-frame coding. Background technique [0002] H.264 and AVS video coding standards are currently one of the mainstream coding standards, and their coding efficiency has more than doubled on the basis of previous coding standards. However, the improvement of its coding efficiency is largely due to the adoption of more flexible and effective coding tools and the increase of coding modes. This makes the coding complexity greatly increased compared with previous video coding standards. Therefore, in many occasions that require high speed and performance of the video encoder, the actual application puts forward higher requirements for the algorithm optimization of the video encoder. Next, take AVS as an example to introduce the video encoding process and analyze its complexity. [0003] During video encoding, video is encoded frame / field. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/109H04N19/147H04N19/176H04N19/33H04N19/34
Inventor 马思伟余琴王诗淇高文
Owner PEKING UNIV