同步变长码码字和码序号的互换算法  

A Translation Algorithm between Code and Index of Synchronized Variable Length Codes

作　　者：黄全亮[1] 刘卫忠[1] 邹雪城[1] 孙德宝[2] 

机构地区：[1]华中科技大学电子科学技术系,武汉430074 [2]华中科技大学控制科学与工程系,武汉430074

出　　处：《计算机与数字工程》2007年第2期1-2,4,共3页Computer & Digital Engineering

摘　　要：基于同步变长码(SVLC)的构造原理,先根据码长的不同将码表分成不同的码组,再根据前n位的不同将码组细分为不同的子码组,然后给出了一种计算SVLC子码组的码长分布的迭代算法。基于码表中码字首先按码长从小到大排列,码长相同时按码字对应的二进制值从小到大排列的准则,并利用码组和子码组的码长分布,给出了一种SVLC的码字和序号互换的算法。In this paper, based on the construct principle of synchronized variable length codes (SVLC), after dividing code table into code group by code length and dividing code group into sub code group by the first n bits, an iterative algorithm to count code length distribution of code group and sub code group of SVLC is derived. Based on the rules of code placing in table, which is that code is placed first by code length and then by the binary value of code, using code length distribution of code group and sub code group, a translation algorithm translation between code and index of SVLC is given.

关 键 词：同步变长码 码长分布 码组 码序号 

分 类 号：TN919.8[电子电信—通信与信息系统]