HEVC and AVS2 8K video decoding method based on parallel video sequence groups

Abstract

The invention discloses an HEVC (High Efficiency Video Coding) and AVS2 (Audio Video Standard 2) 8K decoding method based on parallel video sequence groups. The method specifically comprises the following steps: (1) creating a plurality of decoder cores, and allocating a GOP cache budget and a thread pool budget to each decoder core; (2) extracting each frame of code stream data in the video codestream, detecting the GOP end of the code stream, marking a GOP serial number and marking whether the GOP end exists or not; (3) sequentially sending the video frames into corresponding decoder coresaccording to GOP serial numbers; (4) enabling the decoder kernel to mark the received current GOP serial number on an output frame, and when the decoder kernel receives a GOP ending input frame, marking the GOP ending output frame again through output frame sorting; and (5) sequentially marking output frame serial numbers for frames output by different decoder cores, and sequentially outputting the frames according to the GOP serial numbers and the output frame serial numbers. The method has the advantages that the universality is high, computing resources of the CPU can be fully utilized, theresource utilization rate of the CPU can be greatly increased, and video decoding is accelerated.

Description

technical field [0001] The present invention relates to the technical field of video decoding, in particular to a HEVC and AVS2 8K video decoding method based on video sequence group parallelism. Background technique [0002] HEVC is the latest generation of video coding standard released by the International Telecommunication Union (ITU-T) in 2013. Compared with the previous generation coding standard H264, the compression efficiency of HEVC has doubled, which can greatly reduce the bit rate of 8K ultra-high-definition video. Reduce bandwidth consumption. [0003] AVS2 is the latest generation standard for ultra-high-definition video applications released by China in December 2016. The coding framework of AVS2 is similar to HEVC, and its coding efficiency is slightly better than HEVC. At present, the AVS2 video standard has become the only video coding standard adopted by the State Administration of Radio, Film and Television of China, and has broad application prospects....

AI Technical Summary

Problems solved by technology

However, inter-frame parallelism is limited by the decoding performance of reference frames, and the CPU usage cannot continue to grow with the increase in the number of threads.

However, HEVC and AVS2 8K videos cannot achieve real-time decoding when the CPU resources cannot be improved due to the high video complexity and bit rate.

At the same time, because video decoders have very high requirements for the compatibility of different streams, and multi-SLICE and multi-TILES are rarely used by encoders because of the loss of encoding quality, so for decoders, SLICE parallelism and TILES parallelism are not common. suitability

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