一种基于上下文的树形加权概率统计算法  

An Algorithm of Context-Tree Weighting for Statistical Probability

作　　者：白慧慧[1] 丁晓明[1] 张韬[1] 

机构地区：[1]北方交通大学信息所,北京100044

出　　处：《电声技术》2004年第2期49-52,共4页Audio Engineering

摘　　要：介绍了一种基于上下文的树形加权概率统计算法,基本上解决了高阶马氏链的概率统计问题,提出了一种边统计边编码的自适应算术编码方案,并将其应用于高质量的语音二次压缩算法中。This paper introduced a method named context-tree weighting for source probability and it can be used to estimate the probability of high-order markov chain efficiently. Furthermore, a method of adaptive arithmetic coding that would get the codes according to updating source probability was proposed and used in the secondary speech compression algorithm with high quality.

关 键 词：概率统计 高阶马氏链 自适应算术编码 语音二次压缩 上下文树形加权 

分 类 号：TN912.3[电子电信—通信与信息系统]