Method and device for improving rate distortion optimization calculation efficiency, equipment and storage medium

Abstract

The invention discloses a method, device and equipment for improving rate distortion optimization calculation efficiency and a storage medium, and the method comprises the steps: searching an intra-frame prediction mode through a preset three-step mode search algorithm, and obtaining a candidate intra-frame prediction mode; in each candidate intra-frame prediction mode, carrying out pixel false reconstruction on the coding tree unit to obtain a false reconstruction pixel value of the coding tree unit; obtaining a reconstruction block according to the false reconstruction pixel value, and calculating a square error sum according to the reconstruction block and the original block; and calculating a rate distortion optimization value of each candidate intra-frame prediction mode according to the square error sum and a pre-calculated code rate. According to the method for optimizing the calculation efficiency through rate distortion provided by the embodiment of the invention, the calculation complexity is lower, the data dependence between the blocks is completely removed, and better hardware time sequence and better layout and wiring can be achieved.

Description

technical field [0001] The present invention relates to the technical field of video coding, in particular to a method, device, device and storage medium for improving rate-distortion optimization calculation efficiency. Background technique [0002] In recent years, with the rapid development of communication technology and network media, video data has exploded. Although the computing power of the multimedia processor is continuously enhanced, the storage capacity is continuously increased, and the network bandwidth is continuously improved, they still cannot meet the ever-increasing needs of users. How to use limited bandwidth resources to satisfy users' requirements for video quality to the greatest extent has become a very meaningful research topic. [0003] The video signal has a huge amount of data, and it must be compressed before it can be transmitted and stored in practical applications. Therefore, what people usually see is the reconstructed video signal after d...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the RDO calculation process is very complicated, which mainly comes from two aspects. One is that there are many prediction modes that require RDO, such as various directions in various intra prediction modes and various directions in inter prediction modes. Combination; the second is the dependency between adjacent reconstruction blocks, such as the dependence of reconstructed pixels in the frame. The RDO calculation of the coding unit on the right needs to wait until the reconstructed pixels of the left block come out. This dependency affects Parallelism of RDO Computation

Images