Method, device and equipment for encoding and decoding a video image

Abstract

The present invention provides a video image decoding method, and the method comprises the steps: determining the size of an affine movement compensation sub-image block in an affine image block according to the motion vector differences, motion vector accuracy, the distance between control points in the affine image block, and the size of the affine image block, wherein the size includes a lengthin the horizontal direction and a length in the vertical direction so that the length of the affine image block in the horizontal / vertical direction is integer multiples of the length of an affine motion compensation sub-image block; finally, decoding the affine image block according to the size of the affine motion compensation sub-image block. The method can adaptively adjust the size of the affine motion compensation sub-image block to the optimal size according to the attribute of the affine image block itself, thereby guaranteeing the quality of the decoding, reducing the decoding complexity and effectively improving the decoding efficiency.

Description

technical field [0001] The present invention relates to the field of video image processing, in particular to a video image encoding and decoding method, an encoding device and a decoding device, an encoding device and a decoding device. Background technique [0002] With the rapid development of Internet technology and the increasingly rich material and spiritual culture of people, there are more and more requirements for video applications on the Internet, especially for high-definition video applications, and the data volume of high-definition video is very large. To be able to transmit in the Internet with limited bandwidth, the problem that must be solved first is the problem of high-definition video compression and encoding. Currently, there are two international organizations dedicated to the formulation of video coding standards, namely the International Organization for Standardization (ISO) / International Electrotechnical Commission (IEC) The Motion Picture Experts...

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Problems solved by technology

[0038] However, the size of the sub-image block in the related art is fixed, too small a size of the sub-image block will lead to higher complexity of encoding and decoding, and too large a size of the sub-image block will reduce the encoding and decoding performance, thus resulting in this high-efficiency The encoding method faces great limitations in practical application

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