H.264视频最佳宏块模式快速选择  

Fast optimal macroblock mode selection for H.264 video

作　　者：蒋志平[1] 艾云峰[2] 侯向宁[1] 

机构地区：[1]成都理工大学工程技术学院,四川乐山614000 [2]中国科学院研究生院计算与通信工程学院,北京100049

出　　处：《计算机工程与应用》2011年第9期171-174,共4页Computer Engineering and Applications

摘　　要：H.264现有的高复杂度多模式运动估计和模式选择占据了大部分编码时间,提出了一种新的最佳宏块模式选择算法来加速模式选择过程。通过对宏块模式的时间与空间预测,并结合宏块率失真代价的统计特性,对宏块所有编码模式划分成不同优先级的集合,实现最佳宏块模式的快速判定。实验表明,该算法在大幅度降低编码时间的同时,对宏块模式判断的准确性有了进一步的提升。With a majority of the total complexity,motion estimation is the most computationally expensive part.In this paper a novel algorithm to speed up the inter-mode selection process for the H.264 encoding is presented.The proposed scheme determines the best coding mode of a given macroblock from several mode sets with different priorities by predicting the best mode from neighboring macroblocks in time and in space and by estimating its Rate-Distortion（RD） cost from the macroblock in the previous frame.Experimental results have shown that the proposed algorithm has a further improvement of accuracy of mode decision with significant encoding time degradation.

关 键 词：视频编码 H.264 模式选择 率失真 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]