An End-to-End Content-Aware Congestion Control Approach for MPEG Video Transmission

In this paper, we present a receiver-based, bandwidth estimation rate control mechanism with content-aware probability retransmission to limit the burden on multimedia transmission congested network. Like the TCP friendly rate control (TFRC) protocol, we compute the sending rate as a function of the loss event rate and round-trip time. Considering the different importance of four distinct types of frames in Standard MPEG encoders, we divide data packets into three grades coarsely and adopt adaptive probability retransmission strategy to assure video playback quality. It is an extension of TCP friendly congestion control. This paper describes the smooth rate algorithm and probability retransmission mechanism. The result of experiments with competing TFRC specification demonstrates the proposed approach reaches a higher throughput and higher PSNR than TFRC especially on the bottleneck links.