Image prediction method and related device

Abstract

The embodiment of the invention provides an image prediction method and a related device. The image prediction method comprises steps: a reference block of a current block is determined, wherein the reference block is adjacent to the current block in space, and the reference block is predicted by using an affine motion model; position information and motion information of at least two feature points in the reference block are acquired, wherein the at least two feature points are located at a subblock where at least two control points of the reference block are located, and the at least two control points are control points used by the affine motion model used for predicting the reference block, and the motion information of the subblock where the feature points are located is obtained based on motion information of the corresponding feature points; motion information of each subblock in the current block is computed according to the position information and the motion information of the at least two feature points in the reference block; and motion compensation prediction is carried out on each subblock of the current block according to the motion information of each subblock in the current block, so as to obtain a prediction block of the current block. The embodiments of the invention help to improve the prediction accuracy of the current block.

Description

technical field [0001] The present invention relates to the field of video encoding and video decoding, in particular to an image prediction method and related equipment. Background technique [0002] With the development of photoelectric acquisition technology and the growing demand for high-definition digital video, the amount of video data is increasing. The limited heterogeneous transmission bandwidth and diversified video applications continue to put forward higher requirements for video coding efficiency. The formulation of High Efficient Video Coding (English: high efficient video coding, abbreviation: HEVC) standard was started due to need. [0003] The basic principle of video coding and compression is to use the correlation between space domain, time domain and code words to remove redundancy as much as possible. The current popular practice is to use a block-based hybrid video coding framework to achieve video coding compression through steps such as prediction (...

AI Technical Summary

Problems solved by technology

[0005] Practice has found that the traditional prediction mechanism based on the affine motion model uses the reference block to predict the current block with relatively low accuracy, so it is difficult to meet the high-precision prediction requirements in some scenarios

Images