一种高效的H.264帧内编码全零块判决算法

分析了H.264帧内编码模式选择、整数变换和量化的特点,提出了一种帧内编码全零块判决算法。该算法根据相邻块的编码信息,使用动态判决门限判决量化后的全零块,避免了变换、量化等复杂过程。与已有的全零块判决算法相比,所提算法的全零块判决率最大可以达到87.8%,提高了帧内编码速度,可满足实时视频通信的要求。

Efficient detection algorithm for all-zero blocks in H.264 intra encoding

On analysis of the characters of intra mode selection,integer transform and quantization,an efficient algorithm is proposed to detect all-zero blocks of the encoding intra frame in H.264.In this method,dynamic selection of the threshold is used to examine the all-zero blocks in order to avoid the integer transform and quantization.Compared with the previous methods,the maximum percent of the all zero-blocks detected by the proposed algorithm in the intra macroblocks is 87.8%.It provides significant improvement of coding speed and can meet the needs of the video communication in real time.