DocumentCode :
643806
Title :
Enhanced hierarchical intra mode decision for H.264/AVC
Author :
Hao Zhang ; Fengfeng Tan ; Zhan Ma
Author_Institution :
Sch. of Inf. Sci. & Eng., Central South Univ., Changsha, China
fYear :
2013
fDate :
5-8 Aug. 2013
Firstpage :
1
Lastpage :
5
Abstract :
Fast intra mode decision algorithms in H.264/AVC reduce the encoder computational complexity significantly by eliminating some unlikely prediction modes. However, the encoder speedup typically comes with the sacrifice of the quality loss while such degradation is not negligible in many scenarios. To maintain the encoder speedup enabled by the fast intra mode decision without noticeable quality degradation, a method that estimates the reliability of these fast algorithms based on the rate-distortion (R-D) cost ranking is proposed in this paper. By adding few most probable modes conditionally, the proposed method could improve the video quality greatly compared with the most recent hierarchical intra mode decision (HIMD) scheme in the H.264/AVC, where the B-jontegaard Delta Rate (BD-Rate) loss of the enhanced HIMD decreases from 3.04% to 1.16% on average with just 4.47% increase in encoding time, compared with the default HIMD, both against the full rate-distortion optimization solution.
Keywords :
computational complexity; optimisation; rate distortion theory; video coding; B-jontegaard delta rate; BD-Rate; H.264-AVC; HIMD; computational complexity; encoder speedup; hierarchical intra mode decision; quality loss; rate-distortion cost; rate-distortion optimization; reliability; video quality; Degradation; Encoding; PSNR; Prediction algorithms; Rate-distortion; Reliability; Video coding; H.264/AVC; intra mode decision; reliability refinement; video coding;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Signal Processing, Communication and Computing (ICSPCC), 2013 IEEE International Conference on
Conference_Location :
KunMing
Type :
conf
DOI :
10.1109/ICSPCC.2013.6664126
Filename :
6664126
Link To Document :
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