Inter prediction method based on mmvd mode, video coding method and related devices and equipment

Abstract

The present application discloses an MMVD mode-based inter-frame prediction method, a video coding method, and related devices and equipment. Wherein, the inter-frame prediction method based on MMVD mode includes: constructing a first candidate list of the current coding block in MMVD mode, wherein the first candidate list contains a first preset number of first candidate motion vectors; determining a second preset A number of motion search amplitudes and a third preset number of motion search directions; for each first candidate motion vector: starting from the first candidate motion vector, using different motion combinations of motion search amplitudes and motion search directions respectively Searching to obtain motion vector offsets of the first candidate motion vectors under different motion combinations; based on the motion vector offsets of each first candidate motion vector under different motion combinations, determine and obtain the best motion vector of the current coding block. The foregoing method can improve the accuracy of inter-frame prediction or reduce the coding amount of the inter-frame prediction result with a high probability, and improve the coding compression rate.

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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