一种改进的CAVLC分组解码优化算法  

An Improved Group-based Optimizing of CAVLC Decoder

作　　者：张秀丽[1] 张瑞华[1] 

机构地区：[1]浙江万里学院电子信息学院,浙江省宁波市315100

出　　处：《信息化研究》2009年第4期16-19,共4页INFORMATIZATION RESEARCH

基　　金：宁波市自然科学基金(2006A610003)

摘　　要：CAVLC(基于上下文的自适应变长编码)由于码字的长度不固定,其解码器的设计往往是整个视频解码器的难点之一。文中对H.264熵解码模块进行了研究,利用分组优化查表思想,在分析了CAVLC码表特征后,提出了一种将CAVLC码字分为前缀和后缀两部分,根据前缀分组,利用后缀信息查表得到对应比特串的分组解码优化方法。结果表明,所提出的CAVLC分组解码优化算法在节省存储空间和提高解码速度方面具有优异的性能。Variable length code is a general lossless entropy coding method, which is widely used in video compression standards. This paper puts forward a decoding method of dividing the CAVLC code into two parts through use of ideal group-based codebook based on studying the complexity of the reference decoder of H. 264 and analyzing the characteristics of the CAVLC code table. The method has been proved to be able to save memory and increase decoding speed than old one quoted in reference.

关 键 词：CAVLC解码 H.264 分组优化 

分 类 号：TN911.2[电子电信—通信与信息系统]