文献类型：期刊文献

英文题名：Equal Value String and Copy Above String Based String Prediction for SCC in AVS3

作者：Zhou, Kailun[1];Zhao, Liping[2,3];Ye, Zigao[1];Wang, Huihui[1];Lin, Tao[1];Feng, Sheng[2];Yang, Yufen[1]

机构：[1]Tongji Univ, Coll Elect & Informat Engn, VLSI Lab, Shanghai 200092, Peoples R China;[2]Shaoxing Univ, Dept Comp Sci & Engn, Shaoxing 312000, Peoples R China;[3]Peking Univ, Informat Technol R&D Innovat Ctr, Shaoxing 312000, Peoples R China

年份：2023

卷号：25

起止页码：584

外文期刊名：IEEE TRANSACTIONS ON MULTIMEDIA

收录：SCI-EXPANDED(收录号：WOS:000934993800019)、、EI(收录号：20214811253593)、Scopus(收录号：2-s2.0-85120035216)、WOS

基金：This work was supported in part by the Natural Science Foundation of Zhejiang Province under Grant LY19F020015 and under Grant TY22F025548, in part by the National Science Foundation of China under Grant 61871289, in part by the Natural Science Foundation of Shanghai under Grant 18ZR1440600 and under Grant 19ZR1461100, in part by the public Welfare Technology Research Project of Zhejiang Province under Grant LGG19F020007, and in part by the Social Sciences and Humanities Youth Foundation of Ministry of Education under Grant 21YJCZH039.

语种：英文

外文关键词：Audio video coding standard; screen content coding; string prediction; equal value string; 4:2:0 format

外文摘要：String prediction (SP) is a very efficient screen content coding (SCC) tool which has been adopted in the third generation of Audio Video Standard (AVS3). It is observed that two special types of strings occur frequently. To further improve the coding efficiency for SCC on top of the original SP, a new variation of SP named Equal-value-string and Copy-above-string based SP (ECSP) is proposed. An ECSP coding unit uses only three types of strings: Equal-value-string, Copy-above-string, and Unpredictable-pixel-string. Compared with the AVS3 reference software HPM9.0 with ECSP disabled, using AVS3 SCC Common Test Condition and YUV 4:2:0 test sequences, the proposed technique achieves an average Y BD-rate reduction of 5.54 and 3.01% for All Intra and Low Delay configurations, respectively, with low additional encoding and decoding complexity. The proposed ECSP has been adopted in the AVS3 standard.