Mpeg-4 Video Object-based Tcp-friendly Congestion Control Method

With the proliferation of multimedia applications, bandwidth available to TCP connections is oppressed by "greedy" UDP traffic, and the performance of TCP connections extremely deteriorates. Now more and more applications tend to have a new character of content-based accessing, searching, and interactively manipulating. In order that both TCP and UDP sessions fairly co-exist in the Internet, UDP sessions should react properly against congestion as TCP does, and suit the new trends of content-based accessing, searching, and interactively manipulating.After studied a great many of TCP-Friendly congestion control protocols and the quality-oriented rate control methods in this thesis, we design a congestion control protocol rooted upon a specific application, to manipulate the output video rate of FGS-the scalable MPEG-4 encoder. Since the MPEG-4 video streams consist of multi-objects, we present two rate control policies: one is priority-BL(Base Layer) based, the other is priority-object based, and the priority is decided by CB-TFRC taking account of the user's mind, thus we accomplish the content-based TCP-Friendly rate control. Furthermore, we apply CB-TFRC in IVSS, an Intelligent Video Surveillance System, then solve its end-to-end congestion control problem. Through simulations and experiments, it is proved that CB-TFRC we proposed can cope with the unfair competition between non-TCP streams and TCP streams, and also gives attention to the user's perceived video quality, finally accomplishes QoS of application layer.