Channel-adaptive hybrid ARQ/FEC for robust video transmission over 3G

摘要

This paper addresses the important issues of error control for video transmission over 3G. Based on the time-varying wireless channel conditions and the essential defects of the traditional hybrid ARQ for real-time service, the architecture of the channel-adaptive hybrid ARQ/FEC is presented, moreover an algorithm for encoder is given to automatically adjust the parity data length and the maximum number of retransmissions. The experimental studies show that the transmission efficiency of the proposed algorithm increased 13% than the traditional hybrid ARQ.