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A high-efficiency sub-pixel motion estimation method and system

A motion estimation and high-efficiency technology, applied in the field of source coding communication, can solve problems such as operation error and rate-distortion performance loss, and achieve the effect of reducing search points and speeding up

Active Publication Date: 2021-11-19
BEIJING JIAXUN FEIHONG ELECTRIC CO LTD
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Problems solved by technology

This will not only cause calculation errors, but also cause a loss in rate-distortion performance

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  • A high-efficiency sub-pixel motion estimation method and system
  • A high-efficiency sub-pixel motion estimation method and system
  • A high-efficiency sub-pixel motion estimation method and system

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Embodiment Construction

[0053] The technical content of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0054] The essence of speeding up sub-pixel motion estimation is: (1) reducing sub-pixel search points; (2) reducing redundant sub-pixel interpolation operations. like figure 1 As shown, the high-efficiency sub-pixel motion estimation method provided by the present invention includes the following steps: first, determine the starting point of the best matching point of the predicted pixel; wherein, the best matching point of the pixel is the position that best matches the current block; secondly, Perform 1 / 2 pixel motion estimation according to the small diamond pattern to obtain the 1 / 2 pixel best matching point; then, use the 1 / 2 pixel best matching point as the starting point to search for the 1 / 4 pixel best matching point; Pixel motion estimation ends. The following is a detailed description of this process.

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Abstract

The invention discloses an efficient sub-pixel motion estimation method and system. Wherein, the method includes the following steps: determining the starting point of the best matching point of the predicted pixel; performing motion estimation of 1 / 2 pixel according to the small diamond pattern to obtain the best matching point of 1 / 2 pixel; The best matching point is the starting point, and the best matching point of 1 / 4 pixel is searched; the best matching point of the pixel is obtained; the sub-pixel motion estimation ends. This method can reduce the number of sub-pixel search points, thereby speeding up the speed of sub-pixel motion estimation.

Description

technical field [0001] The invention relates to a high-efficiency sub-pixel motion estimation method and a corresponding high-efficiency sub-pixel motion estimation system, belonging to the technical field of information source coding communication. Background technique [0002] The video encoder encodes and compresses the original data to obtain as little reconstruction distortion as possible, or to obtain the lowest possible bit rate. To this end, many new technologies are adopted, such as more complex inter / intra prediction algorithms, variable block size motion compensation, multi-mode block division, variable size block transformation, rate-distortion optimization technology, sub-pixel interpolation, and sub-pixel motion estimation. , sub-pixel motion compensation, adaptive interpolation filtering, etc. These improvements in compression performance are all at the cost of increasing a large amount of calculation, which brings great inconvenience to real-time video encod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/80H04N19/51H04N19/523
CPCH04N19/51H04N19/523H04N19/80
Inventor 欧阳国胜
Owner BEIJING JIAXUN FEIHONG ELECTRIC CO LTD
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