CHANNEL-ADAPTIVE HYBRID ARQ/FEC FOR ROBUST VIDEO TRANSMISSION OVER 3G (FriAmPO1)

Author(s) : Jianwei Wen (Dept. Automation, Tsinghua University, China) Qionghai Dai (Dept. Automation, Tsinghua University, China) Yihui Jin (Dept. Automation, Tsinghua University, China)

Abstract : This paper addresses the important issues of error control for video transmission over 3G. The architecture of channel-adaptive hybrid ARQ/FEC is presented. By taking the time-varying wireless channel conditions and the essential defects of the traditional hybrid ARQ for real-time service into account, an algorithm for encoder is given to automatically adjust the parity data length and the maximum number of retransmissions according to the simple feedback messages. The performance of the proposed algorithm is analyzed through experimental studies.

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