Peer-assisted packet loss repair for IPTV video multicast

摘要

Emerging IPTV technology uses source-specific IP multicast to deliver TV programs to the end-users. To provide timely and reliable services over the error-prone DSL access networks, a combination of multicast forward error correction and unicast retransmissions is employed to mitigate the impact of impulse noise. In current systems, the retransmission function is provided by the Retransmission Servers.