博士论坛

博士论坛第七十三期学术报告信息

作者:admin 日期:2014-07-21 13:27:00 浏览:

报告题目:Hybrid random-structured coding

报告人: 美国德克萨斯 A&M 大学 熊子祥教授

时间:7月21日(星期一)上午9:30

地点:武汉大学国家多媒体软件工程技术研究中心4楼会议室

报告简介:

Shannon's classic source and channel coding theorems proved that random codes are optimal for point-to-point communication systems. However, in network communication systems, random codes are not always optimal. For example, Korner and Marton first showed in 1979 that low-complexity structured (e.g., linear) coding beats the best known random coding scheme for the binary two-help-one source coding problem. This has led to much recent focus on the performance gains of structured (e.g., lattice) codes over random codes in multiterminal settings.

In this talk, we advocate a hybrid random-structured coding approach for network communications. Our hybrid approach brings together the best of two different worlds of random coding and structured coding. It is inspired by Ahlswede and Han's scheme for the general two-help-one source coding problem.

 We apply hybrid random-structured coding to the Gaussian two-help-one problem. Together with a new lower bound, we are able to provide for the first time partial sum-rate tightness result. We additionally show that hybrid random-structured coding performs within two b/s from the optimal sum-rate. 

 报告人简介: 

 熊子祥教授,男,42岁,美国德克萨斯 A&M 大学教授,IEEE Fellow,研究方向为网络信息论、信源编码和信源信道联合编码等。在IEEE杂志上发表论文57篇。他在分布式视频编码(Distributed Video Coding, DVC)研究领域具有开拓性研究的学术地位,先后多次为重要国际学术会议,如ICASSP 2005,Globe Com 2007和ICME 2007等大会做特邀报告。熊子祥教授拥有分布式 视频编码和其它视频编码技术的12项美国专利,担任 IEEE Trans. SMC,IEEE Trans. Signal Processing,IEEE Trans. Image Processing 和IEEE Trans. CSVT 等11个国际杂志的编委,20多个国际会议的程序委员会成员、组织者或主席。熊子祥教授于1999年获美国国家科学基金奖;2000年获ARO青年研究员奖;2001年获 ONR青年研究员奖; 2003年获 Texas A&M University的Faculty Fellow Award;2006年获IEEE杂志最佳论文奖。