文献类型：期刊文献

英文题名：A Universal String Matching Approach to Screen Content Coding

作者：Zhao, Liping[1,2];Zhou, Kailun[2];Guo, Jing[2];Wang, Shuhui[2];Lin, Tao[2]

机构：[1]Shaoxing Univ, Dept Comp Sci & Engn, Shaoxing 312000, Peoples R China;[2]Tongji Univ, Inst VLSI, Coll Elect & Informat Engn, Shanghai 200092, Peoples R China

年份：2018

卷号：20

期号：4

起止页码：796

外文期刊名：IEEE TRANSACTIONS ON MULTIMEDIA

收录：SCI-EXPANDED(收录号：WOS:000427623000003)、、EI(收录号：20174104263820)、Scopus(收录号：2-s2.0-85030775419)、WOS

基金：This work was supported by the National Natural Science Foundation of China under Grant 61601200. The associate editor coordinating the review of this manuscript and approving it for publication was Prof, Zhu Li.

语种：英文

外文关键词：High efficiency video coding (HEVC); audio video coding standard (AVS); screen content coding (SCC); string matching; hash table

外文摘要：This paper proposes a universal string matching (USM) approach to screen content coding (SCC). USM uses a primary reference buffer and a secondary reference buffer for string matching and includes three modes: general string (GS) mode, constrained string 1 (CS1) mode, and constrained string 2 (CS2) mode. The CS1 mode and CS2 mode are constrained cases of the GS mode. Due to the diversity of the screen content, each of the three modes plays an indispensable role in coding some types of screen content. When using USM to code a coding unit (CU), one of the three modes is selected to code the CU. Compared with high-efficiency video coding (HEVC) SCC reference software HM-16.6 + SCM-5.2 of full frame search range for intrablock copy, USM achieves an average Y BD-rate of -28.4% for five text and graphics with motion (TGM) sequences from the audio video coding standard SCC common test condition (CTC) test suite and -5.8% for eight TGM test sequences from the HEVC SCC CTC test suite in all intraconfigurations, with a nearly 10% decrease in encoding runtime and almost the same decoding runtime.