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A motion estimation method and apparatus

A motion estimation and image technology, applied in image communication, digital video signal modification, electrical components, etc., can solve problems such as large amount of calculation, high computational complexity, and affecting the efficiency of motion estimation, so as to reduce the amount of calculation and complexity, The effect of increasing the compression speed

Active Publication Date: 2020-08-28
BEIJING QIYI CENTURY SCI & TECH CO LTD
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Problems solved by technology

[0010] Through the above analysis, it can be found that the existing HAD matching criterion has a large amount of calculation and high computational complexity, which affects the efficiency of motion estimation and further affects the speed of video coding and compression.

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  • A motion estimation method and apparatus

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Embodiment Construction

[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0044] see figure 1 , showing a flowchart of a motion estimation method provided in this embodiment, the method includes:

[0045] Step S11: Segment and transform the reference image to obtain a reference Hadamard image;

[0046] The reference image is also called the reference frame. The reference image is divided into non-overlapping 4×4 blocks, each 4×4 block is subjected to Hadamard transformation, and the transformed 4×4 blocks are combined in the origin...

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Abstract

The invention provides a motion estimation method and apparatus. In view of the situation that a reference block of a sub block has a corresponding Adama transform block in a reference Adama image, the sub block and the Adama transform block corresponding to the reference block are directly subtracted, and an absolute value sum is obtained to get a corresponding Adama transform matching cost. Compared with the traditional method, the motion estimation method has the advantages that no complex process of subtracting and obtaining the absolute value sum after the Adama transform is executed, thereby reducing the calculated amount and the complexity of the HAD matching criterion and improving the video encoding compression speed.

Description

technical field [0001] The present invention relates to the technical field of video image processing, and more specifically, to a motion estimation method and device. Background technique [0002] Motion estimation algorithm is one of the core algorithms of video compression coding. High-quality motion estimation algorithm is the premise and foundation of high-efficiency video coding. The basic idea of ​​motion estimation is to divide each frame of the image sequence into many non-overlapping sub-blocks, and then find the block most similar to the current block from the reference frame for each block in the current frame according to a certain matching criterion, that is, The matching block, the relative displacement between the matching block and the current block is the motion vector, and the process of obtaining the motion vector is called motion estimation. During video compression, the current block can be fully recovered only by saving the motion vector and residual...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/563H04N19/57H04N19/59
CPCH04N19/563H04N19/57H04N19/59
Inventor 朱洪波
Owner BEIJING QIYI CENTURY SCI & TECH CO LTD