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Motion estimation method of video compression

A technology of motion estimation and video compression, applied in digital video signal modification, television, electrical components, etc., can solve the problems of not using image attributes and statistical characteristics, not using correlation, not adopting search strategies, etc.

Inactive Publication Date: 2008-06-18
SNAPTRACK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] Since the full search method is used for motion estimation, it is necessary to indiscriminately search for each position point in the image area of ​​a given search window, without adopting any search strategy, and without using any attributes and statistical characteristics of the image, nor using the image The correlation between the block and its previous frame and the adjacent image blocks of this frame in terms of motion vectors, so its search speed is very low

Method used

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Embodiment Construction

[0102] It can be seen from the description of the prior art above that in the motion estimation process of the H.264 video compression coding technology, constructing an initial search position set is a very important link, which often determines the level of the motion estimation method. A large number of studies have shown that, in fact, within the search window, the distribution of real motion vectors (that is, the global optimal position reference point) is symmetrical about the search center point. However, within the search window, the distribution of real motion vectors is often not uniform, but has obvious center-biased characteristics, that is to say, the closer to the search center, the greater the distribution probability of motion vectors ; and in image regions of different shapes and sizes with the search center as the geometric center, motion vectors have different center bias distribution probabilities. The most ideal shape of the image area is a circle, because...

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Abstract

The method includes following steps: determines an initial parameter; in term of the initial parameter determines the searching center; in term of the searching center defines an eight point hexagon; executes the search for the next eight point hexagon motion; or in term of the searching center defines a four point diamond shape; executes the search for the next four point diamond shape motion; finally finds the motion estimation result.

Description

technical field [0001] The present invention relates to video compression coding technology (H.264 standard), in particular to a video compression motion estimation method. Background technique [0002] The H.264 compression coding standard is currently the most advanced international standard for video compression coding. For simplicity of description, it will be referred to as the H.264 standard hereinafter. [0003] At present, the video compression coding technology based on the H.264 standard mainly uses the inter-frame prediction (Inter-frame prediction) method with motion estimation (ME, Motion Estimation) and motion compensation (MC, Motion Compensation) technology as the core to remove video Redundant information exists between successive image frames in a sequence, so as to achieve the purpose of video data compression. Since each image frame in the video sequence is a discrete time sampling value from a time-continuous motion scene, there is a large correlation ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/26H04N19/56H04N19/57
Inventor 罗忠宋彬常义林周宁召
Owner SNAPTRACK