Title: Cooperative Source and Channel Coding for Wireless Video Transmission
Speaker: Yao Wang (joint work with Hoi Yin Mok, Elza Erkip) 11:50-12:10

ABSTRACT

Past work on cooperative communications has focused on improving channel reliability through cooperative transmission strategies. We propose to jointly allocate bits among source coding, channel coding and cooperation to minimize the expected source distortion. Recognizing that not all source bits are equal, we further propose to protect the more important bits through user cooperation. We simulate and compare four modes of video transmission that differ in their error protection strategy (equal vs. layered, with vs. without cooperation). Our simulation uses the H.263+ video codec and the RCPC channel codec over quasi-static Rayleigh fading channels. We show that cooperation can provide significant improvement over no-cooperation when the average channel SNR is in the low to medium range, and that layered cooperation can extend this benefit to the entire range of the channel quality.