基于H.323协议集中式视频会议系统的研究实现.pdf

基于H323协议集中式视频会议系统的研究与实现 Abstract With the rapid development of work,multi—munication gain a new oppoflunity ofdevelopment,and now on theway ·media conference receive awide spread concem As aspecialapplication ofmulti· an solution ofmulti-media conference,video eonferencing system based on protocel have a trendofgreat growth work application,and have apromising futureas well as a good study value. This paper firstanalyze thepacket-based multi—munication protocol--1TU-T ,which ineulde theconstruction ofvideo conferencing system within work,main protocols andprocedures ,thepaper provide thedesign scheme ofcentralized video conference system,and in打oduee theopetth323 protocol stack,which support protocal theanalysis and research of core technique oftheopen SOUt'Ce code in thisprotocol stack,make out the source code realization of info munication inthecentralized video conference system. The paper finallydesign and realize two key skillsofconcentrated video conferencing system,which include chairman control mechanism and firewall traversing controlmechanism enable system tocontrol theprocedure ofvideo conference remotely,and achieve thepurpose ofrealconference Firewall traveling skillcan break through thelimitof LAN,and enable system toapply inWAN. The video conferencing system provided inthispaper easy toimplement and theresults ofexmperiment system can be widely used inthe fieldssuch as remote conference,distance education andmedical treatment etc,and ofgood practical value Key words:Video conferencing,,Multithread,MCU,Chairman control mechanism, Firewalltransvering. 学位论文独创性声明: 本人所呈交的学位论文是我个人在导师指导下进行的研究工作及取得的研究成果。尽我所知,除了文中特别加以标注和致谢的地方外,论文中不包含其他人已经发表或撰写过的研究成果。与我一同工作的同事对本研究所做的任何贡献均已在论文中作了明确的说明并表示了谢意。如不实,本人负全部责任。论文作者(签名):—字业垄&一 2006年3月20日学位论文使用授权说明河海大学、中国科学技术信息研究所、国家图书馆、中国学术期刊(光盘版)电子杂志社有权保留本人所送交学位论文的复印件或电子文档,可以采用影印、缩印或其他复制手段保存论文。本人电子文档的