Paper Info
Title
Group-Based Fast Mode Decision Algorithm for Intra Prediction in HEVC
Abstract
High Efficiency Video Coding (HEVC), also known as H.265, is the next generation video compression standard beyond H.264. 35 intra prediction modes(IPM) are defined in HEVC to improve coding efficiency. But so many modes also result in the dramatically increased encoding complexity. In this paper, a novel fast intra mode decision algorithm is proposed to speed up the original intra coding in HEVC. Different from previous algorithms, we analyzed the statistics generated by rough mode decision (RMD) process which is adopted in HEVC. First, we found that the modes generated by RMD are usually adjacent to each other, thus representing roughly a same direction. We merged adjacent modes into same groups. Furthermore, early termination and pixel-based edge detection methods are employed to make accurate prediction by heuristically reducing the number of candidates for rate distortion optimization (RDO) process. Experimental results show that our proposed fast intra mode decision algorithm can obtain almost 23.52% time savings in all intra low complexity cases on average with negligible performance loss compared to the original HEVC intra coding in HM7.0. Meanwhile, the results are especially favorable when it comes to high resolution test sequences with up to 0.4% bit-rate increment and 21.81% time savings.
Year
DOI
Venue
2012
10.1109/SITIS.2012.41
SITIS
Keywords
Field
DocType
rate distortion optimization process,coding efficiency,h.264.35 intraprediction modes,mode decision,hm7.0,ipm,decision algorithm,time saving,rdo process,data compression,intra prediction mode,group-based fast mode decision algorithm,h.265,hevc,intra mode decision algorithm,early-termination method,pixel-based edge detection method,proposed fast intra mode,rough mode decision process,edge detection,intra prediction,video coding,rmd process,group-based fast mode decision,encoding complexity,fast intramode decision algorithm,hevc intracoding,intra low complexity case,high-resolution test sequences,original intra,high-efficiency video coding,original hevc intra,next generation video compression standard,adjacent mode
Edge detection,Computer science,Coding (social sciences),Artificial intelligence,Rate–distortion optimization,Speedup,Computer vision,Heuristic,Algorithmic efficiency,Pattern recognition,Algorithm,Data compression,Encoding (memory)
Conference
ISBN
Citations 
PageRank 
978-1-4673-5152-2
36
2.00
References 
Authors
2
4
Name
Order
Citations
PageRank
Shunqing Yan1473.16
Liang Hong219333.79
Weifeng He36114.69
Qin Wang4362.68