DocumentCode :
719414
Title :
2-D Index Map Coding for HEVC Screen Content Compression
Author :
Yiling Xu ; Wei Huang ; Wei Wang ; Fanyi Duanmu ; Zhan Ma
Author_Institution :
Shanghai Jiaotong Univ., Shanghai, China
fYear :
2015
fDate :
7-9 April 2015
Firstpage :
263
Lastpage :
272
Abstract :
This paper introduces a 2-D index map coding of the palette mode in screen content coding extension of the High-Efficiency Video Coding (HEVC SCC) standard to further improve the compression performance. In contrast to the current 1-D search using RUN to represent the length of matched string, we bring the block width and height to describe the arbitrary rectangle shape. We also use the block vector displacement to signal the matched block distance efficiently. By enlarging the search range from current coding tree unit (CTU) to a small neighbor CTU window (i.e., 3×5 CTUs), it provides the coding efficiency comparable to the case that full-frame intra block copy is used. It is more practical to use the local search window in real life considering the trade-off between the coding efficiency and implementation cost.
Keywords :
data compression; video coding; 2D index map coding; CTU; HEVC SCC; HEVC screen content compression; block vector displacement; coding tree unit; high-efficiency video coding; palette mode; screen content coding; Bandwidth; Color; Complexity theory; Computers; Encoding; Image color analysis; Indexes; HEVC; Palette mode; screen content coding;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Data Compression Conference (DCC), 2015
Conference_Location :
Snowbird, UT
ISSN :
1068-0314
Type :
conf
DOI :
10.1109/DCC.2015.62
Filename :
7149283
Link To Document :
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