Method and system for spatially disjoint joint source and channel coding for high-quality real-time multimedia streaming over connection-less networks via circuit-switched interface links

摘要

A system and method for providing multimedia data streaming over a mixed network including a packet-switched and circuit-switched network. The multimedia source server performs both source coding to reduce the overall size of the data and channel coding to provide redundancy for packet reconstruction of lost or late packets. The source coding (or compression) and channel coding (protection against packet loss) are designed jointly, but are performed at two different locations to achieve optimum utilization of bandwidth. The channel coding is removed and packet reconstruction or concealment is performed at the edge of the packet-based network prior to passing the multimedia data on to the circuit-switched network. Retransmission is unnecessary in the present invention which is undesirable for real-time data streaming. A bidirectional embodiment is also described.