Media streaming over mobile networks

Summary form only given. Robust multimedia transmission over wireless channels is a challenging problem due to the high bit error rate (BER) and its impact on compressed media quality. We propose an adaptive quality-of-service control scheme to achieve end-to-end image and video quality improvement with the following two new components: (1) an optimal mode decision algorithm that provides the best tradeoff between compression efficiency and error-resilience in rate-distortion (R-D) sense, which works in the compression layer; and (2) delay-constrained hybrid ARQ capable of reducing the residual BER for the compression layer while guaranteeing delay bound and achieving high throughput. Simulation results for MPEG4 video are demonstrated to show the effectiveness of the new scheme. We believe the proposed approach provide a promising technology for streaming rich media contents over emerging mobile networks such as 3G wireless framework