基于不等差错保护的信源信道联合编码技术的研究  

Research of Joint Source-channel Coding Technique Based on Unequal Error Protection

作　　者：邹俊[1] 杨济安[1] 

机构地区：[1]重庆邮电大学通信学院,重庆400065

出　　处：《通信技术》2008年第2期78-80,共3页Communications Technology

摘　　要：文中首先对与信源信道联合编码技术相关的一些必要背景知识作了简要介绍。接着提出了一种无线信道中基于小波SPIHT算法的联合信源信道编码方法。主要思想是信源部分采用基于小波SPIHT的编码方法,而信道部分采用RCPC编码对SPIHT输出码流按重要性进行不等错误保护,并加入交织以增强对突发错误的抗击能力。实验表明本方法能够提高系统的性能和编码效率,可以应用于信噪比波动较大的信道。This paper first gives a brief overview of the necessary background knowledge involved in JSCC. Then, it presents a joint source and channel coding scheme based on SPIHT and image transmission on wireless chnnel.The main idea is that the source coding adopts image coding based on SPIHT while the channel coding adopts RCPC for SPIHT output bit streams with different values to UEP.And the interleaving is added for enhaning the resistibility to burst errors. The experimental results show that this scheme can improve system performance and coding efficiency, and apply for the channel with heavily fluctuating SNR.

关 键 词：SPIHT 联合信源信道编码 不等错误保护(UEP) 

分 类 号：TN919.81[电子电信—通信与信息系统]