H.264中帧内编码算法及其快速实现研究

新的视频编码标准H.264使用了帧内预测的编码方式,这与以往的视频编码标准相比在很大程度上提高了帧内编码效率,节省了码流,但同时也增加了编码器的复杂度,因此有必要对H.264帧内编码算法进行快速实现,以满足实时视频通信的要求.首先详细介绍H.264帧内编码的实现过程,然后使用SIMD(单指令多数据流)技术对帧内编码进行快速实现.实验结果表明,与未使用快速算法相比,使用该快速实现算法后,H.264帧内编码速度得到显著提高.

The Research of Intra Encoding and Its Implement Based on H.264

The new video coding standard H.264 has used the method of intra prediction. Compared with the video standards before, H.264 intra prediction enhances the efficiency of video coding drastically. Although the new method reduced the bit rate, it also increases the complexity of the encoder. So it is necessary to optimize the algorithm in H.264 for the practical application. In this paper, at first we introduce the process of intra coding in detail, then present the fast implement method using SIMD(single instruction multiple data). Experimental results show that the speed of intra coding is obviously improved using proposed technique.