MMVD mode-based inter-frame prediction method, video coding method, related device and equipment

Abstract

The invention discloses an MMVD mode-based inter-frame prediction method, a video coding method and related devices and equipment. The MMVD mode-based inter-frame prediction method comprises the following steps: constructing a first candidate list of a current coding block in an MMVD mode, the first candidate list comprising a first preset number of first candidate motion vectors; determining a second preset number of motion search amplitudes and a third preset number of motion search directions; for each first candidate motion vector, performing searching by taking the first candidate motionvector as a starting point and respectively utilizing different motion combinations of the motion search amplitude and the motion search direction to obtain motion vector offset of the first candidatemotion vector under different motion combinations; and determining the optimal motion vector of the current coding block based on the motion vector offset of each first candidate motion vector underdifferent motion combinations. According to the method, the accuracy of inter-frame prediction can be improved or the coding amount of the inter-frame prediction result can be reduced with a large probability, and the coding compression ratio is improved.

Description

technical field [0001] The present application relates to the field of video coding and decoding, and in particular to an MMVD-based inter-frame prediction method, a video coding method, and related devices and equipment. Background technique [0002] Due to the relatively large amount of video image data, it is usually necessary to encode and compress video pixel data (such as RGB, YUV, etc.) to reduce the amount of video data. The compressed data is called a video code stream, and the video code stream passes through a wired or wireless network. It is transmitted to the client, and then decoded and watched. [0003] The entire video coding process includes processes such as acquisition, prediction, transformation, transformation quantization, and entropy coding. Inter-frame prediction is often included in the prediction process to remove temporal redundancy of video images. Inter prediction modes generally include triangle mode, affine mode, conventional Merge mode (that...

AI Technical Summary

Problems solved by technology

The inter-frame prediction process needs to predict the best motion vector (Motion Vector, MV) of the current coded block, and then encode based on the best motion vector. Therefore, if the accuracy of the inter-frame prediction result is low, it may cause it to be unreadable during decoding. The original video image or the video image is seriously distorted, affecting the user experience, and even causing the user to miss interesting or important information

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