| 变长码的抗误码扩散能力分析 |
| |
| 引用本文： | 黄全亮,刘卫忠,邹雪城,孙德宝. 变长码的抗误码扩散能力分析[J]. 华中科技大学学报(自然科学版), 2007, 35(2): 71-73 |
| |
| 作者姓名： | 黄全亮 刘卫忠 邹雪城 孙德宝 |
| |
| 作者单位： | 华中科技大学,电子科学与技术系,湖北,武汉,430074;华中科技大学,控制科学与工程系,湖北,武汉,430074 |
| |
| 基金项目： | 信息产业部电子信息产业发展基金 |
| |
| 摘 要： | 给出了一种基于离散无记忆信源模型的分析变长码抗误码扩散能力.该方法通过分析序列中某一时刻某个码字出现的概率,以及该码字发生错误后正好变成与该码字同码长的另一码字的概率,得到该时刻不发生误码扩散的概率.而整个序列不发生误码的概率为该概率的序列长次幂.模拟计算结果显示,该方法可在不增加平均码长和码方差的情况下,选择出抗误码扩散能力最好的码组.
|
| 关 键 词： | 变长码 抗误码扩散 离散无记忆信源 平均码长 码方差 |
| 文章编号： | 1671-4512（2007）02-0071-03 |
| 收稿时间： | 2005-10-26 |
| 修稿时间： | 2005-10-26 |
Analysis of the error resiliency of variable length codes |
| |
| Huang Quanliang,Liu Weizhong,Zou Xuecheng,Sun Debao. Analysis of the error resiliency of variable length codes[J]. JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE, 2007, 35(2): 71-73 |
| |
| Authors: | Huang Quanliang Liu Weizhong Zou Xuecheng Sun Debao |
| |
| Abstract: | The analysis of error resiliency of variable length codes(VLC) by Discrete Memoryless Source model is proposed.The probability of error resiliency was counted at the time when the appearing probability of one codeword in the code sequence at a fixed time and the transition probability from this codeword to other codeword with same codeword length to this codeword were analyzed.The error resiliency probability of whole code sequence is the code sequence length power of this transition probability.The simulation results show that the VLC with best error resiliency could be picked out in the VLCs which possesses the same average code length and codeword variance by the method. |
| |
| Keywords: | variable length codes error resiliency discrete memoryless source average code length codeword variance |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
