On end-to-end architecture for transporting MPEG-4 video over the Internet

With the success of the Internet and flexibility of MPEG-4, transporting MP EG-4 video over the Internet is expected to be an important component of ma ny multimedia applications in the near future. Video applications typically have delay and loss requirements, which cannot be adequately supported by the current Internet, Thus, it is a challenging problem to design an effici ent MPEG-4 video delivery system that can maximize the perceptual quality w hile achieving high resource utilization. This paper addresses this problem by presenting an end-to-end architecture for transporting MPEG-4 video ove r the Internet, We present a framework for transporting MPEG-4 video, which includes source rate adaptation, packetization, feedback control, and erro r control. The main contributions of this paper are: 1) a feedback control algorithm based on Real Time Protocol (RTP) and Real Time Control Protocol (RTCP); 2) an adaptive source-encoding algorithm for MPEG-4 video which is able to adjust the output rate of MPEG-4 video to the desired rate; and 3) an efficient and robust packetization algorithm for MPEG video bit-streams at the sync layer for Internet transport. Simulation results show that our end-to-end transport architecture achieves good perceptual picture quality for MPEG-4 video under low bit-rate and varying network conditions and effi ciently utilizes network resources.