Motion vector correction, prediction method, encoding method, encoder, and storage device

Abstract

The invention discloses a motion vector correction method, a prediction method, a coding method, a coder and a storage device. The motion vector correction method comprises the following steps: dividing a current block to obtain at least one sub-block; correcting the first prediction result of each sub-block by using a plurality of correction motion vector combinations to obtain a plurality of second prediction results of each sub-block, wherein each correction motion vector combination comprises a first correction motion vector and a second correction motion vector which are independent of each other, and the first prediction result of the sub-block is obtained by predicting the sub-block by using the final motion vector of the current block; selecting a correction motion vector combination corresponding to the second prediction result with the minimum prediction cost for each sub-block to serve as a final correction motion vector combination of the sub-block; and performing correction by using the final correction motion vector combination of all the sub-blocks. In this way, the prediction accuracy can be improved.

Description

technical field [0001] The present application relates to the technical field of encoding and decoding, and in particular relates to motion vector correction, prediction, encoding method, encoder and storage device. 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. Inter-frame prediction uses the temporal correlation between image frames to compress the imag...

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 corrected. During the long-term research and development process, the inventor of the present application found that the current motion vector correction method still has certain limitations, and also to a certain extent Affected the accuracy of inter prediction

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