Video image decoding method and device

Abstract

The invention discloses a video image decoding method and device. The method comprises the following steps: analyzing a first identifier from a code stream; analyzing the second identifier from the code stream; when the second identifier indicates that the current to-be-processed image block adopts an intra-frame and inter-frame prediction mode, a third identifier is analyzed from the code stream,and the third identifier is used for indicating the intra-frame prediction mode adopted by the current to-be-processed image block; when the first identifier indicates that a sub-block prediction mode is adopted for performing inter-frame prediction on the current to-be-processed image block, performing inter-frame prediction on the current to-be-processed image block according to the sub-block prediction mode to obtain an inter-frame prediction block of the current to-be-processed image block; performing intra-frame prediction on the current to-be-processed image block according to an intra-frame prediction mode indicated by the third identifier to obtain an intra-frame prediction block of the current to-be-processed image block; and performing weighted summation on the inter-frame prediction block and the intra-frame prediction block to obtain a prediction block of the current to-be-processed image block. By implementing the method and the device, compatibility of multiple prediction modes can be realized, so that the decoding efficiency is improved.

Description

technical field [0001] The embodiments of the present application relate to the field of video coding and decoding, and in particular, to a video image decoding method and device. Background technique [0002] With the development of information technology, high-definition television, web conferencing, IPTV, 3D television and other video services are developing rapidly, and video signals have become the most important way for people to obtain information in their daily lives due to their advantages of intuition and efficiency. Because the video signal contains a large amount of data, it needs to occupy a large amount of transmission bandwidth and storage space. In order to effectively transmit and store video signals, it is necessary to compress and encode video signals, and video compression technology has increasingly become an indispensable key technology in the field of video applications. [0003] The basic principle of video compression coding is to use the correlatio...

AI Technical Summary

Problems solved by technology

However, the sub-block fusion mode is not compatible with the intra-frame and inter-frame prediction modes.

Images