Forward error correction lost packet recovery algorithm based on relative packet weight in streaming media systems

The transmission of real-time stream media is based on RTP (Real-time transport protocol) and delivered over best-effort networks without ARQ mechanism. With the theories of forward error correction (FEC) and MPEG video coding, this paper presents a FEC lost packets recovery algorithm based on calculation of relative RTP packet weight. The assignment of redundant packets takes characteristic of different video stream into consideration. Simulation results show that FEC lost packets recovery algorithm is efficient to provide higher quality for streaming media system when the packet lost rate is high by comparing with other current algorithms.