Congestion control of video traffic with transcoders

In this paper, video transcoding is introduced as a mechanism capable of decoupling video encoders from network constraints. A video transcoder is proposed for congestion control of pre-encoded video traffic over asynchronous transfer mode (ATM) networks and to provide flexible transmission in video distribution applications. It is shown that as long as the network delay does not exceed the equivalent multiplex buffer capacity, traffic can be efficiently controlled to ease congestion. It is also shown that video distribution over heterogeneous networks can use transcoders for providing fairness among users of the same transmission tree