In recent years, Content Delivery Networks (CDN) and Peerto-

Peer (P2P) networks have emerged as two effective paradigms for

delivering multimedia contents over the Internet. An important feature

in CDN and P2P networks is the data redundancy across multiple

servers/peers which enables efcient media delivery. In this paper, we

propose a network coding framework for efcient media streaming in

either content delivery networks or P2P networks in which, multiple

servers/peers are employed to simultaneously stream a video to a single

receiver. Unlike previous multi-sender schemes, we show that network

coding technique can (a) reduce the redundancy storage, (b) eliminate the

need for tight synchronization between the senders, and (c) be integrated

easily with TCP.