Abstract: Studied in this report is a new channel-allocation-based video-on-demand system called VODStar. The system employs some new channel scheduling schemes including controlled multicast and extended exponential broadcasting, and the architecture combining channel-scheduling controller with data-processing pump. RTSP, RTP and SDP protocols are implemented over IP-based network. Some performance test focusing on server I/O and network bandwidth shows that the system could lighten the bottleneck problem in traditional systems.