声明
ABSTRACT
摘要
ACKNOWLEDGMENTS
Contents
List of figures
List of tables
Chapter Ⅰ Video Confereneing System
1．1 Introduction to Video Conferencing System
1．2 Components of Video Conference System
1．3 History and Development
1．3．1 Developments of video Conference System
1．3．2 Video Coding Layer
1．3．3 Network Abstraction layer
1．4．Problem Statement
1．5 Research Content
1．6 Thesis Structure
Chapter Ⅱ Multicas
2．Multicast background
2．1．1 Background
2．1．2 Unicast
2．1．3 Broadcast
2．1．4 Multicast
2．2 IP Multicast
2．3 Efficiency of IP Multicast
2．4 Multicast Routing Protocols
2．4．1 DVMRP(RFC 1075)
2．5 Multicast extension to Open Shortest Path First(MOSPF)
2．5．1．Protocol-Independent Multicast Protocol Specification
2．5．2 EIGRP Metrics
2．6 Network Layer Multicast
2．7 Application Layer Multicast
2．8 Hybrids Multicast
2．9 IP Multicast Problems
2．10 Summary
Chapter Ⅲ Design of the System
3．1 Source root multicast-based conferencing model
3．1．1 The multi-point video conferencing system design principles and models
4．1．2 Transmission structure and properties of the source root of the multicast tree
3．2 Multicast confenncing system design based on the multieast tree
3．2．1 Design ideas
3．2．2 The system software architecture
3．3 Summary
Chapter Ⅳ Implementation and Evaluation
4．1 Tools
4．1．1 System Description
4．2 Development Platform
4．2．1 H．323
4．2．2 Terminals
4．3 The application controls of general media stream
4．5 Application System
4．6 Conference Security Model
4．7 Join a Conference
4．8 Chapter Summary
Chapter Ⅴ SUMMARY OF THESIS
References
