一种新型的可逆变长码——代价测评对称可逆变长码  

A Novel Symmetrical Reversible Variable-length Code Based on Cost-evaluating

作　　者：崔文惠[1] 周辉[1] 朱仁峰[1] 

机构地区：[1]装备指挥技术学院,电子工程系,北京101416

出　　处：《装备指挥技术学院学报》2004年第3期81-84,共4页Journal of the Academy of Equipment Command & Technology

基　　金：部委级资助项目

摘　　要：因其良好的防误码扩散性能,可逆变长码已被采纳为H.263+和MPEG-4的标准.应用自适应的思想,由一个自定义的代价函数构建了一种新型的对称可逆变长码--代价测评对称可逆变长码,并从最小汉明距离的角度出发,阐述了代价测评对称可逆变长码性能优于Huffman 码、Takishima RVLCs和B2码的理论基础.Reversible variable-length code has been adopted by H.263+ and MPEG-4 because of efficient error resilient capabilities. In the paper, a novel symmetrical reversible variable-length codes, cost-evaluating symmetrical reversible variable-length codes, were proposed. They can overcome the limitation of Takishima algorithm by appling adaptive thoughts. Finally, comparing the Hanmming distances of these codes, the theoretical bounds of the codewords is explained.

关 键 词：代价测评 对称可逆变长码 误码扩散 Takishima算法 H.263+ MPEG-4 

分 类 号：TN919.81[电子电信—通信与信息系统]