Video image encoding and decoding method, device and equipment

Abstract

The invention provides a video image decoding method. The method comprises the following steps: based on motion vector difference, motion vector precision, a distance between control points in an affine image block, and a size of the affine image block, determining the size of an affine motion compensation sub-image block in the affine image block, wherein the size comprises the length in the horizontal direction and the length in the vertical direction, and the length of the affine image block in the horizontal / vertical direction is an integral multiple of the length of the affine motion compensation sub-image block in the horizontal / vertical direction; decoding the affine image block according to the size of the affine motion compensation sub-image block. According to the method disclosed in the invention, the size of the affine motion compensation sub-image block can be adaptively adjusted to the optimal size according to the attribute of the affine image block, so that the decodingquality can be ensured, decoding complexity can be reduced, and decoding efficiency can be effectively improved.

Description

[0001] This application claims priority to a Chinese patent application filed with the China Patent Office on August 11, 2017, with application number 201710687117.5 and titled "Method, device, and device for encoding and decoding video images", the entire contents of which are incorporated by reference in this application. technical field [0002] 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 [0003] 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...

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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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