AN ERROR-RESILIENT H.263+ CODING SCHEME FOR VIDEO TRANSMISSION OVER WIRELESS NETWORKS  

作　　者：Li Jian Bie Hongxia 

机构地区：[1]School of hformation Engineering, Beijing University g]Posts ＆ Telecommunications, Beijing 100876, China [2]Northeast Institute of Geography and Agricultural Ecology, CAS, Changchun 130012, China

出　　处：《Journal of Electronics(China)》2006年第6期831-836,共6页电子科学学刊（英文版）

基　　金：Li Jian, born in 1978, male, Master candidate. School of Information Engineering, Mailbox 261, Beijing University of Posts and Telecom-munications, Beijing 100876, China. [e-mail].

摘　　要：Video transmission over wireless networks has received much attention recently for its restricted bandwidth and high bit-error rate, Based on H.263＋, by reversing part stream sequences of each Group Of Block （GOB）, an error resilient scheme is presented to improve video robustness without additional bandwidth burden. Error patterns are employed to simulate Widcband Code Division Multiple Acccss,（WCDMA） channels to check out error resilience performances. Simulation results show that both subjective and objective qualities of the reconstructed images are improved remarkably. The mean Peak Signal to Noise Ratio （PSNR） is increased by 0.5dB, and the highest increment is 2dB.Video transmission over wireless networks has received much attention recently for its restricted bandwidth and high bit-error rate. Based on H.263+, by reversing part stream sequences of each Group Of Block (GOB), an error resilient scheme is presented to improve video robustness without additional bandwidth burden. Error patterns are employed to simulate Wideband Code Division Multiple Access (WCDMA) chan-nels to check out error resilience performances. Simulation results show that both subjective and objective qualities of the reconstructed images are improved remarkably. The mean Peak Signal to Noise Ratio (PSNR) is increased by 0.5dB, and the highest increment is 2dB.

关 键 词：Wireless networks Error detection Error resilient Error localization RESYNCHRONIZATION 

分 类 号：TN925.93[电子电信—通信与信息系统]