H.264/AVC快速帧间模式选择算法

Fast inter mode decision in H.264/AVC

H.264/AVC利用率失真优化(RDO)技术进行宏块模式选择,提高了编码效率,但大大增加了编码复杂度。文章研究了一种P帧编码的快速帧间模式选择算法,利用宏块模式与avgJmotion之间的关系进行候选搜索块模式分类,再利用帧间条件对分类后的模式进行判决,排除不可能作为最佳模式的宏块模式。实验结果表明,在信噪比降低和码率增加可以忽略不计的情况下,该算法平均节省编码时间约57%。

H .264/AVC improves coding efficiency with the rate‐distortion optimization （RDO ） tech‐nique for the block mode decision ,but it also has high coding complexity .In this paper ,a fast inter mode decision method in P frames is researched .First ,block mode group decision is made based on the relationship between block modes and avg Jmotion .Then the modes rarely selected as the optimal mode with inter conditions are inactivated .The experimental results show that the proposed method provides about 57% encoding time savings on average without significant reduction in signal‐to‐noise ratio（SNR） and increase in rate .