Inter-frame module selecting method based on three-dimensional wavelet video code

Abstract

The invention discloses an inter-frame module selecting method based on a three-dimensional wavelet video code, comprising the following steps of: step 1), utilizing mean absolute difference values MAD (Mean Absolute Difference), MADV (Vertical Mean Absolute Difference) and MADH (Horizontal Mean Absolute Difference) of a father block pixel as references of texture complexity; selecting one from child types including child1, child2 and child3; if selecting the child type child1, executing step 4); otherwise, executing step 2); step 2), calculating respective mean values of two sub-blocks of the corresponding child type and calculating the difference of the two mean values; step 3), selecting a specific binary tree dividing module according to the mean value differences; and step 4), finally, comparing a father block movement compensation value with the sum of child movement compensation values; if the father movement compensation value is small, not carrying out block division; and if the child movement compensation values are small, keeping the corresponding child type and carrying out the block division. According to the inter-frame module selecting method disclosed by the invention, a mixed quartic tree and binary tree dividing method is adopted, the flexibility of the block division is improved; and texture threshold value information is adopted so that an amount of time complexity of an algorithm can not be increased.

Description

technical field [0001] The invention belongs to the technical field of inter-frame block selection, and relates to an inter-frame block mode selection method based on three-dimensional wavelet video coding. Background technique [0002] Between frames of video data, there is not only correlation in pixels, but also correlation between frames in a certain area. Therefore, in order to make full use of inter-frame motion information, remove inter-frame redundant information, and perform inter-frame correlation Motion compensation is necessary. [0003] Motion compensation mainly includes the following parts: [0004] 1) Segment the moving target from the current frame; [0005] 2) Find the reference target in the reference frame; [0006] 3) Motion compensation with displacement; [0007] 4) Encoding the motion compensation information. [0008] The changes in motion of objects in reality, including translation in all directions, rotation of objects, shrinkage of object si...

AI Technical Summary

Problems solved by technology

It can be found that although this method makes the size of the block division variable, the shape of the block division in this type of method is limited, that is, there are only square blocks, which greatly reduces the flexibility of the block division, which in turn affects the motion compensation. performance, which generally reduces the performance of video encoding

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