摘要
为了改善MP4码流在AWGN信道中传输的效果,文章对Turbo码的特性和MP4码流在AWGN信道中的传输进行了分析,选用1/2码率,log-MAP回归的turbo码,采用UDP(UserDatagramProtocol)的包长在噪声信道环境中进行传输仿真实验,结果证明这种联合编码方法能够有效地保护和纠正高斯衰减信道中MP4码流传输的大部分错误。
This paper presents a approach to MP4stream transmission over AWGN channels.In order to get better per-formance of MP4for AWGN channels,turbo codes has been used in the method.It chooses rate1/2turbo encoder with a recursive log-MAP decoding in this work.The circumstance is typical for UDP packets sent over the noise channel.Simulation results demonstrate this novel combination can protect and correct the major errors during transmission over the Gaussian fading channel.
出处
《计算机工程与应用》
CSCD
北大核心
2003年第20期15-17,共3页
Computer Engineering and Applications
基金
国家863高技术研究发展计划项目基金支持(编号:2002AA103087)
上海市科委基金项目支持(合同号:025115018)
