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A fast block mode selection approach for H.264 visual coding |
| LIN Wei-yao, Fang Xiang-zhong, HUANG Xiu-chao, LI Dian, LIU Xiao-feng |
| Institute of Image Communication and Information Processing, Shanghai Jiao Tong University, Shanghai 200030, China; |
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Abstract In this paper, a new fast mode-selection approach is proposed. This algorithm combines the proposed approaches of mode pre-decision and precise large-small mode decision, by selecting the best mode efficiently. Experimental results show that the proposed approach can reduce the computational cost of full search and fast multi-block motion estimation by 80 % and 45 %, respectively, with similar visual quality and bit rate. The proposed algorithm also reduces by 75 % the computational cost of the large-small mode isolation algorithm for low-motion sequence coding, and with 0.06 PSNR gain and 3.7 % reduction in bit rate.
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Issue Date: 05 December 2006
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