Motion compensation correction method, encoding method, encoder and storage medium

Abstract

The invention discloses a motion compensation correction method, an encoding method, an encoder and a storage medium. The motion compensation correction method comprises the steps of obtaining a motion compensation result of a current encoding block, wherein the motion compensation result of the current encoding block comprises a motion vector and an inter-frame prediction value of the current encoding block; determining to-be-corrected pixels in the current encoding block, wherein the to-be-corrected pixels comprise part or all of pixels in the current encoding block; obtaining a corrected motion vector of the to-be-corrected pixel by utilizing a motion vector of an associated pixel of the to-be-corrected pixel, wherein the associated pixel comprises a spatial domain associated pixel and/or a time domain associated related pixel; and correcting the predicted value of the to-be-corrected pixel based on an optical flow formula by using the corrected motion vector and the predicted valuegradient of the to-be-corrected pixel, wherein the predicted value gradient of the to-be-corrected pixel is calculated by at least using the inter-frame predicted value of the current encoding block.According to the method, the correction effect can be improved, and then the prediction accuracy is improved.

Description

technical field [0001] The present invention relates to the technical field of encoding and decoding, in particular to a motion compensation correction method, an encoding method, an encoder and a storage medium. Background technique [0002] Because the amount of video image data is relatively large, it is usually necessary to compress the video pixel data, thereby reducing the amount of video data. The compressed data is called a video code stream. The video code stream is transmitted to the client through a wired or wireless network, and then decoded and viewed, which can achieve the purpose of reducing network bandwidth and storage space during the transmission process. [0003] The entire video coding process includes prediction, transformation, quantization, encoding and other processes, in which prediction is divided into two parts: intra prediction and inter prediction. The inter-frame prediction process is actually a process of acquiring motion vector (MotionVector...

AI Technical Summary

Problems solved by technology

In order to improve the prediction accuracy, after the motion vector is obtained, the motion vector is generally compensated. Bi-Directional Optical Flow (BDOF) compensation method is a kind of mot

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