基于块时空相关性的H.264快速帧间模式选择算法

Fast Inter Mode Decision Algorithm Based on Block Spatio-Temporal Correlation in H.264

针对H.264视频编码器中计算量大的帧间模式选择部分,提出一种快速帧间模式选择算法,利用块编码模式的时空相关性,在视频序列连续帧时间与空间邻域内块最佳编码模式相关性统计分析的基础上,对当前待编码块进行先验预测,确定其初始候选模式,缩小编码模式选择的范围,最后通过设定自适应门限来提前终止模式搜索.实验结果表明:本算法在保证视频图像质量和编码压缩率的前提下,显著地降低了编码器的计算复杂度.

Since H.264 inter-frame video encoding mode decision involved much calculation,in this paper,a novel fast mode decision algorithm for inter-frame based on block spatio-temporal correlation is proposed.Then the best mode correlation statistical law of block in the spatio-temporal neighborhoods of time-successive frame is analyzed,and using the prior prediction to determine the initial search mode,scale of all the modes was restricted via self-adaptive threshold for early termination.Experimental results show...