Robust Packet Video Transmission Over Heterogeneous Wired-to-Wireless IP Networks Using ALF Together with Edge Proxies

In this paper, we address the problem of robust packet video transmission over heterogeneous wired-to-wireless IP networks. Digital video delivered over wired-towireless networks is expected to suffer quality degradation from both packet loss and bit errors in the payload. In this paper, the quality degradation due to packet loss and bit errors in the payload are quantitatively compared. Furthermore, the performance of a joint sourcechannel coding (JSCC) approach employing forward error-control (FEC) coding schemes for video transmission is also studied. Finally, we apply application-level framing (ALF) together with use of an edge proxy in a mobile support station to implement differential and adaptive error-control depending on the corresponding network conditions. Results indicate that with an appropriate JSCC approach, FEC-based error-control techniques together with passive error-recovery techniques can significantly improve the effective video throughput and lead to more acceptable video delivery quality over time-varying wired-to-wireless networks.