Optimized Cross-Layer Unequal Error Protection for Wireless Video Communication

IEEE TENCON 2013——Error control strategies to video bitstream are usually provided at different layers of the communication network. Optimizing the error control strategies at different layers independently leads to inefficient utilization of the resources. In this talk, a cross-layer strategy to optimally utilize the application and physical layer resources for unequal error protection (UEP) of wavelet coded scalable video is investigated. We propose a cross-layer optimized UEP scheme, combining optimal forward error correction (FEC) at application layer and hierarchical QAM (HQAM) at physical layer. A look-up table-based approach, to select optimal parameter values at both layers that maximizes the overall video quality for a given channel condition, is suggested. A wide range of video sequences of different degree of motion and texture are considered to design the look-up table. The major advantage of the look-up table based approach is the low computation complexity of the transmission system, which is one of the major issue in portable video communication devices. Simulation results show the proposed scheme outperforms other techniques comprehensively over a wide range of channel conditions.

关键词： 无线视频通信 通信网络 可伸缩视频 不等差错保护 分层QAM 最优前向纠错 IEEE TENCON 2013

主讲人：Mohd Ayyub Khan 机构：Aligarh Muslim University

时长：0:16:10 年代：2013年