摘要： 针对H.264/AVC在提高编码效率和图像质量的同时增加计算复杂度的问题，通过分析H.264的编码区块样式及相邻模式间的相关性，提出一种帧间模式选择算法。其中包括对编码区块样式中的信息进行分析，结合相邻模式的相关性，确定最优模式所处的模式类别，减少需要计算的模式个数。实验证明，该算法不需要额外的计算就可以获得CBP，在图像性能和码率基本保持不变的情况下，可以降低约58%的编码时间。

关键词: H.264/AVC技术, 率失真优化, 模式选择, 编码区块样式, 模式分类

Abstract: H.264/AVC enhances the coding efficiency and image quality at the cost of a high computational complexity. By analyzing the Coded Block Pattern(CBP) and the correlation of neighboring modes, a fast inter mode selection algorithm is proposed. The information contained in CBP and the correlations of neighboring modes are analyzed to gain the mode classification that the optimization mode belongs to, thus decreases the number of mode need to be calculated. Experimental results show that the coding time reduces about 58% without obvious PSNR and bitrate change.

Key words: H.264/AVC technology, Rate Distortion Optimization(RDO), mode selection, Coded Block Pattern(CBP), mode classification

中图分类号: 

• TP319