Multimedia Conferencing Systems Key Technologies To Support Ip Multicast

The multimedia conference is a developing application of telecommunication. On the other hand, with videoconference applications' extending. IP multicast networks makes fast progress. This article comes up with the multimedia conference system supporting IP multicast, and researches and analyses some involved key technologies.First, this article brings forward the objective of research on the multimedia conference system supporting IP multicast, and the background of it, introduces the development and applications of multimedia communications, the important basic technologies of the multimedia conference, and the features of the multimedia conference.Then, the article introduces the architecture of the multimedia communication systemover the packet-based networks------H.323 system, and the key conceptions andprinciples of the IP multicast.This article summarizes the multimedia conference system supporting IP multicast, introduces the architecture of the component endpoint, and describes some involved key elements.The article researches and analyses some key technologies used to apply IP multicast to multimedia conference systems, including the implementation schemes of the IP multicast, real-time transportation of audio and video, conference announcement, and analyses and discusses the application of the IP multicast.The article describes the implementation of multimedia conferences supporting multipoint modes using IP multicast.In the end, this article presents a summary and gives a prospect to the future research on the multimedia conference applications.