无线视频通讯中的自适应差错非均匀保护方案  

Research on Channel-Adaptive Unequal Error Protection for Video Transmission over Wireless Channels

作　　者：王薇[1] 刘文予[1] 金欣[1] 王曜[1] 

机构地区：[1]华中科技大学电子与信息工程系,湖北武汉430074

出　　处：《微电子学与计算机》2004年第7期53-57,共5页Microelectronics & Computer

基　　金：国家863资助项目(2002AA11901003);国家自然科学基金项目(60372067)

摘　　要：针对划分了重要级别的H.264视频编码数据提出五种可能的不平等保护策略,通过测试和比较,最终提出一种高误码率下无线视频可靠性传输的全局最优不平等保护策略。仿真实验表明,在无线网络带宽和信道误码率不同的情况下,这种最优策略都能使接收端信源解码后的视频图像峰值信噪比(PSNR)既稳定又具鲁棒性。A novel adaptive UEP scheme which realizes the protection over wireless video data is proposed. After scaling the encoded video data of H.264 coder, five possible UEP schemes are constructed. By adaptively adjusting parameters of channel coders and allocating the available bit rate for different important data, the best performing scheme is chosen. Simulation results show that, as the bite-error rate and band-width of the wireless channel change, the proposed scheme endues the PSNR of the decoded video picture at the receiver with stability and robustness.

关 键 词：差错非均匀保护 RS编码 视频传输 无线通信 

分 类 号：TN911[电子电信—通信与信息系统]