Error Control for IPTV over xDSL Networks

We discuss the necessity of error control for supporting IPTV over imperfect access networks. In particular, we consider typical DSL environments, and examine the physical-layer impairments and error-mitigation techniques. For these networks, we evaluate the performance of two different application-layer Forward Error Correction (FEC) methods. An overview of hybrid error-control methods and recent developments in standardization is also presented.