基于非同等纠错Turbo码的MP4传输  

MP4 Transmission Using Turbo Codes with Unequal Error Protection

作　　者：方志军[1] 周源华[1] 邹道文[2] 周军[1] 张正华[1] 

机构地区：[1]上海交通大学图像通信与信息处理研究所,上海200030 [2]江西科技师范学院,南昌330027

出　　处：《上海交通大学学报》2004年第4期542-546,共5页Journal of Shanghai Jiaotong University

基　　金：国家高技术研究发展计划(863)项目(2002AA103087);上海市科委基金项目(025115018)

摘　　要：为了改善MP4在噪声信道中传输的效果,充分考虑MP4码流(信源编码)及Turbo码(信道编码)的特性,根据MP4码流中信息比特重要性的不同,对其进行不同等差错保护.仿真结果表明,这种联合信源信道编码方法能够有效地保护MP4码流的重要信息,纠正MP4码流在高斯衰减信道传输中的绝大部分错误.既提高了MP4码流传输过程中的抗误码性能,又减小了同等差错保护Turbo码的码长.An approach for MP4 stream transmission over noise channel was presented. In order to get better performance of MP4 for busy channel, Turbo codes were used, taking account of the characters of MP4 stream and Turbo coders to improve the effect. The unequal error protection method was used according to the bit importance. The simulation results demonstrate that this combination can protect much more important bits in MP4 stream and correct major errors during the transmission over Gaussian fading channel.

关 键 词：TURBO码 高斯衰落信道 联合编码 不同等差错保护 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]