Interframe prediction encoding method, interframe prediction decoding method and equipment

Abstract

The invention relates to an interframe prediction encoding method, an interframe prediction decoding method and equipment. The interframe prediction encoding method comprises the following steps of: taking a motion vector predicted value obtained according to the motion information of an encoded macro block as a center, and acquiring a reference area most matched with the content features of the current encoded macro block; dividing the current encoded macro block into sub-blocks according to the dividing mode of the reference area; dividing the reference area according to the content features; and performing motion estimation on the sub-blocks, and searching the optimized motion vector for interframe prediction encoding. By using stronger time relevance between a reference image and an encoded image, a reference area which is matched with the content features of the encoded macro block is found in the reference image, the dividing mode or code rate allocation mode of the encoded macro block is determined according to the content features of the reference area, and the accuracy of the macro block division is improved. Therefore, the prediction error is reduced, and the accuracy of the interframe estimation value of the macro block is improved.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to an inter-frame predictive encoding method, an inter-frame predictive decoding method and equipment. Background technique [0002] In the traditional video coding standards, the motion estimation of inter-frame predictive coding is based on a regular-shaped block, and its motion information and prediction difference are coded. The smaller the motion estimation block size, the more accurate the motion vector, and the smaller the error of motion estimation. However, simply reducing the size of the motion estimation block increases the description of the motion vector, and the overall coding efficiency does not necessarily improve. The inter-frame predictive coding of standard H.264[1] adopts motion estimation technology with variable block size, and there are 16×16, 16×8, 8×16, 8×8, 8×4, 4×8, 4× 4 and 7 different sizes of blocks are used for motion estimation. Thro...

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Problems solved by technology

[0005] In the process of realizing the present invention, the inventor found that the prior art has at least the following defects: in natural scene images, the positions of moving objects are random, and their shapes are mostly irregular. The object is still changing its position and shape. The existing technology adopts a regular division method for macroblocks, and performs motion estimation through regular macroblock division methods (such as rectangular division and straight line division), which will inevitably lead to an increase in the inter-frame prediction error. , especially for macroblocks with moving object edges, the prediction error is more obvious

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