Subset Selection in Type-II Hybrid ARQ/FEC for Video Multicast

—This paper proposes an error control scheme that minimizes the total distortion experienced by the receivers using a version of Type-II hybrid ARQ/FEC. Based on the feedback information about the losses in the previous Group-of-Pictures (GOP), the server sends parity packets for a subset of the frames from that GOP with the aim of minimizing the total distortion experienced by the receivers. The subset selection problem is NPhard, so we propose a suboptimal method to solve it based on simulated annealing. Experimental results for the case when a single parity packet is used per group of 16 packets show that the proposed subset selection improves the plain Type-II hybrid ARQ/FEC by over 4 dB in decoded video PSNR, and achieves a

• Type: Conference
• Year: 2009
• Where: ICC
• Authors: S. Mohsen Amiri, Ivan V. Bajic
• Keywords: Communications, ICC 2009, Parity Packet, Total Distortion, Type-ii Hybrid Arq/fec