基于参数冗余量分配方案和可变参数估计准则的 GSM EFR信源信道联合解码算法

周琳; 吴镇扬

doi:10.3724/SP.J.1146.2007.01756

基于参数冗余量分配方案和可变参数估计准则的 GSM EFR信源信道联合解码算法

doi: 10.3724/SP.J.1146.2007.01756

周琳,
吴镇扬

基金项目:

东南大学科技基金(XJ0704268)资助课题

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出版历程
- 收稿日期: 2007-11-07
- 修回日期: 2008-04-14
- 刊出日期: 2008-11-19

Joint Source-Channel Decoding Algorithm Based on Redundancy Allocation and Variable Estimation Criterion for GSM EFR

摘要

摘要: 该文利用GSM EFR(Enhanced Full Rate)语音编码参数的冗余信息，提出了一种新的基于迭代结构和参数估计的联合解码算法框架；针对GSM EFR编码参数由非等概分布和帧间相关性提供的冗余量，本文提出了联合解码算法中两类冗余信息在信道解码，信源解码的分配方案。同时针对不同语音编码参数的特性，引入不同的估计准则。仿真结果表明，该文算法显著提高了GSM EFR参数接收性能，提高了解码语音信噪比，改善了接收系统性能。
- 信源信道联合解码 /
- 冗余信息 /
- 迭代 /
- 分配方案
Abstract: Based on GSM EFR (Enhanced Full Rate) parameter redundancy, this paper proposes a new structure of joint source-channel decoding based on iterative channel decoder and parameter estimation. Based on the analysis of GSM EFR parameter redundancy, the paper presents the reasonable redundancy allocation strategy to arrange the two kinds of redundancy between the source decoder and channel decoder. Also, according to the characteristic of different speech coefficient, different estimation criterions are presented. Simulation results show that the algorithm of this paper improves the receiver performance significantly.
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参考文献(1)

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