文献类型：期刊文献

英文题名：Fast intra coding in AVS3 based on direct non-first pre-coding skip

作者：Cao, Xueyan[1];Lin, Tao[1];Zhao, Liping[2];Yang, Yufen[3];Zhou, Kailun[1];Wei, Hu[4];Chen, Xianyi[5]

机构：[1]Tongji Univ, Coll Elect & Informat Engn, Shanghai, Peoples R China;[2]Shaoxing Univ, Sch Comp Sci & Engn, Shaoxing, Zhejiang, Peoples R China;[3]Shanghai Inst Technol, Sch Comp Sci & Informat Engn, Shanghai, Peoples R China;[4]Molchip Technol Shanghai Co Ltd, Shanghai, Peoples R China;[5]Hisense Elect Informat Grp Co Ltd, Qingdao, Peoples R China

年份：2024

卷号：98

外文期刊名：JOURNAL OF VISUAL COMMUNICATION AND IMAGE REPRESENTATION

收录：SCI-EXPANDED(收录号：WOS:001144125800001)、、Scopus(收录号：2-s2.0-85180541390)、WOS

基金：Acknowledgements This work was financially supported partially by the National Natural Science Foundation of China (No. 62271321) , the Zhejiang Provincial Natural Science Foundation of China (No. LZ24F010003, No. LZ24F020006, No. LR23F020001, No. LZ23F020003, No. LY20F020011, No. LTY22F020003, No. TY22F025548) , the Science and Technology Plan Project in Basic Public Welfare class of Shaoxing city (No. 2022A11002, No. 2023A11006) , the Social Sciences and Humanities Youth Foundation of Ministry of Education of China (No. 21YJCZH039) , the Scientific Research Foundation of Shanghai Institute Technology (No. YJ2022-67) .

语种：英文

外文关键词：Audio-Video Coding Standard; QTBT; EQT; CU pre-coding; Intra prediction

外文摘要：The third generation of Audio Video Coding Standard (AVS3) adopts sophisticated block partitioning structure with a multi-type tree, which includes Quad-Tree (QT), Binary-Tree (BT), and Extend Quad-Tree (EQT). During multi-type tree recursive block partitioning and pre-coding process of encoding, each Coding Unit (CU) of each Size at each Location (CUeSeL) of the picture is repeatedly pre-coded many times when visiting each branch of each tree. Although there are early termination mechanism, the number of visits for each CUeSeL is still very high and up to more than fifty. This process brings very high coding complexity. In order to reduce the coding complexity of AVS3, this paper proposes a method named Direct Non-First Pre-coding Skip (DNFPS) for a CUeSeL to directly and completely skip all non-first pre-coding under specific conditions. The conditions include, but are not limited to, those related to the first pre-coding. The contributions of the paper are as follows. In I pictures, for a CUeSeL with top-left location (x, y), if both x and y are multiples of 64 or if a set of conditions related to first pre-coding is satisfied, then each non-first pre-coding is skipped, and the coding result of the first pre-coding is reused for each non-first pre-coding skipped. In non-I pictures, each non-first pre-coding is skipped, and the coding result of the first pre-coding is reused for each non-first pre-coding skipped, provided a set of conditions related to first pre-coding is satisfied. The experimental results demonstrate that DNFPS has a negligible impact on coding efficiency under All Intra (AI) configurations, and coding runtime is reduced by 16 %.