摘要
本文研究了基于H.332协议的分布式松耦合会议系统的模型和优点 ,设计并实现了基于H.332的IP组播多媒体会议系统。该系统利用时间戳、序列号和同步源标记实现了音频、视频的同步、错序纠正和多路音频、视频的区分 ,通过视频的分层编码和分层组播传输实现了流量控制。与IP单播多媒体会议系统的对比实验表明 ,基于H.332的IP组播多媒体会议系统具有规模扩展性强、资源利用率高等优点。
By analyzing the system model of H.332 decenralized and loosely coupled conference, the advantages of such system are summarized. An IP multicast multimedia conference based on H.332 is designed and implemented. Timestamp, sequence number and synchronization source tags are used in this system, and video is delivered in multi layers to do flow control in heterogeneous network. The control experinent results show that IP multicast conference has much better scalability and more efficient bandwith utilization than IP unicast conference system.
出处
《电信科学》
北大核心
2000年第9期21-24,共4页
Telecommunications Science
基金
国家杰出青年基金
