Video decoding method and apparatus, computer equipment and storage medium

Abstract

Embodiments of the present application provide methods and apparatuses for video encoding. In some examples, a method of video encoding includes obtaining, from an encoded video bitstream, motion information for a group of blocks in a picture, the motion information indicating a base motion vector for the block, and the base motion The vector points to the reference picture in the prediction list; according to the basic motion vector and the target difference in the first coordinate direction, determine the first range of the target motion vector of the block along the first coordinate direction, wherein for the first range Any two motion vectors within the range, the difference between the integer pixel parts of the two motion vectors along the first coordinate direction is equal to or less than the first target difference; the basic motion vector is converted into a target motion vector according to the first range ; generating reconstructed samples of the chunk for output based on the target motion vector.

Description

[0001] Incorporated herein by reference [0002] This application claims U.S. Provisional Application No. 62 / 725,927, filed on August 31, 2018, entitled "Subblock Motion Vector Constraint," filed on September 21, 2018, with Application No. 62 / 734,987, U.S. Provisional Application Titled "Improved Subblock Motion Vector Constraint," U.S. Provisional Application No. 62 / 788,838, filed Jan. 5, 2019, titled "Affine Motion Vector Clipping" , and the priority of U.S. Application No. 16 / 517,156, filed July 19, 2019, entitled "Method and Apparatus for Video Coding with Motion Vector Constraints," the entire contents of which are provided by This application is incorporated by reference. technical field [0003] The present application relates to video coding and decoding technologies, and in particular, to a video decoding method and apparatus, computer equipment and storage medium. Background technique [0004] Video encoding and decoding is possible through inter-picture predict...

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Problems solved by technology

[0010] Embodiments of the present application provide a video decoding method and device, computer equipment, and storage media, aiming to solve the problem that in the inter-frame prediction mode, the smaller the size of the sub-block, the greater the need for memory bandwidth, and the larger the size of the sub-block Larger, the greater the loss of coding efficiency, and the influence of the constrained sub-block motion vector written back to the motion field in the affine inter-frame mode and affine merge mode, the motion vector of the control point of the spatially adjacent block does not The problem of coding efficiency loss caused by reusing motion vector prediction

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