Abstract: Based on the analysis of the Resource Reservation Protocol(RSVP), Real time Transport Protocol(RTP), Real time Control Protocol(RTCP) and Real Time Streaming Protocol(RTSP), a multimedia synchronization control scheme over IP is proposed. It combines RTSP with RSVP to set up and manage reserved-bandwidth streaming sessions that are carried by RTP. After mapping users’ synchronization requirements into the network QoS(FLOWSPEC in RSVP), RSVP can reserve resource to guarantee intra-stream synchronization. RTCP control packets can be used to determine the network congestion state and to control the quality of session., Inter-stream synchronization can be achieved by adjusting the process of playout. With this scheme, intra-stream and inter-stream synchronization can be guaranteed in real-time multimedia applications over IP.

Key words: multimedia synchronization, resource reservation protocol, real time transport protocol, real time streaming protocol