H.264快速模式选择算法中的提前终止策略

顾梅花; 余宁梅; 寇立康; 朱磊

doi:10.11834/jig.20110326

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H.264快速模式选择算法中的提前终止策略
Fast mode decision algorithm for H.264 based on early termination method
2011年16卷第3期页码：305-309
网络出版：2011-04-01，

纸质出版：2011
DOI： 10.11834/jig.20110326
稿件说明：

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顾梅花, 余宁梅, 寇立康, 朱磊. H.264快速模式选择算法中的提前终止策略[J]. 中国图象图形学报, 2011,16(3):305-309. DOI： 10.11834/jig.20110326.

Gu Meihua, Yu Ningmei, Kou Likang, Zhu li. Fast mode decision algorithm for H.264 based on early termination method[J]. Journal of Image and Graphics, 2011, 16(3): 305-309. DOI： 10.11834/jig.20110326.

摘要

针对H.264中模式选择计算复杂度高的问题，提出一种快速模式选择算法。根据帧间编码最佳模式的统计规律，找出宏块的时间空间特性与最佳模式的关系，在帧间模式选择的各个阶段，检测宏块的时间空间特性，一旦满足相应的残差一致性条件或空间一致性条件，则提前终止模式选择。实验结果表明，该方法在输出比特率平均升高2.11%的情况下，编码时间能平均减少23.11%，峰值信噪比平均提高0.058dB。

Abstract

To simplify the computational complexity in mode selection process for H.264

a fast mode decision algorithm is proposed in this paper.According to the statistical rule of the best mode chosen by inter frame

the relationship of the temporal and spatial characteristics with the best mode is found. At each stage of inter mode selection

the temporal and spatial characteristics of macroblock(MB) are detected

once the residual homogeneous or spatial homogeneous conditions are satisfied

the mode selection process is terminated.Experimental results show that this method can make the encoding speed accelerate about 23.11% and peak signal to noise ratio(PSNR) improve about 0.058dB

with only 2.11% increase about bit rate.