基于java的视频会议系统
设计与实现
重庆大学工程硕士论文
学生姓名：***
指导教师：***
兼职导师：***
工程领域：软件工程
重庆大学软件学院
年月
Design and Implementation of Java-Based Video Conference System
A Thesis Submitted to Chongqing University
in Partial Fulfillment of the Requirement for the
Degree of Master of Engineering
By
***
Supervised by Prof. ***
Supervised by Associate-Prof. ***
Specialty: Software Engineering
College of Software Engineering of Chongqing
University, Chongqing, China
摘要
随着互联网的发展与进步，网络与计算机应用已经普及到社会的各个层面。对于一个逐渐壮大的集团化企业来说，高效的管理模式和工作方式，直接影响着其在市场竞争中的地位。某集团（全称：某集团有限公司）下辖18个分/子公司、污水处理厂及项目部，集团总部或在分支机构召开的各种办公会议，
不仅花费了大量的时间和经费，也给公司管理带来很大的不便。因此，必须有一种新的会议方式，解决某集团公司面临的，会议多、效率低的现实问题。笔者作为某集团信息部员工，在深入调研后，提出开发视频会议系统的方案，并参与了系统需求分析、设计、实现、项目管理等全过程。该方案详细论述了利用Java相关技术，开发基于SIP协议视频会议系统的详细过程。
本文的研究工作包括两大部分：（1）利用SIP协议完成信令的多点呼叫控制，从而实现对会议的管理。（2）利用RTP协议和Java相关技术实现多媒体的通信。
通过本系统的研发取得了以下几个方面的成果：
（1）视频会议服务器端，其实现的主要功能包括：主持会议、操控会议、结束会议；客户端，其主要功能是参加会议、参与文件管理等操作。
（2）在网络上利用SIP协议和IP组播技术实现了多点之间的媒体流通信。系统开发上利用到的技术主要有包括java多媒体技术、java网络编程、多播技术等。具体实现的功能包括：文本传输功能，实现对会议中的文件进行传输，并利用java 的输入输出机制，对文件进行上传、下载、传输、编辑等操作。
（3）实现了音视频会话功能，实现远程会话功能。采用java网络编程技术以及IP的多播技术，对音视频进行网络传输、上传、转存、格式转化等操作。
该系统经过多次测试，已经在某集团内部上线运营，运行情况稳定良好。给该公司在管理上带来效益，节省了管理成本，提升了管理效率。
关键字：视频会议、SIP、RTP、java技术
Abstract
With the development of the Internet and progress, network and computer application has spread to all aspects of the society. For a gradual expansion of collectivization enterprise that, efficient mode of management and work methods, the direct impact on the position in the market competition. Kangda environmental group (full name: **environmental protection industry group Co., LTD.) presides over 18 points/subsidiaries, sewage treatment plants and projects department, group headquarters or in the branches of various kinds of office held a meeting, not only has spent a lot of time and money, also give company management bring the great inconvenience. Therefore, there must be a new way to solve * environmental protection, meeting, the meeting of the group company faces, the low efficiency of more realistic problem. The author in the deep research, put forward the development of video conferencing system plan which was described in detail by using Java related technology, based on the development of video conferencing system SIP protocol process in detail.
The study included two parts: (1) using SIP protocol complete signaling the multi-point call control, so as to achieve meeting management. (2) using your RTP agreement and Java related technical multimedia communication.
Through this system development made the following several aspects of achievements:
(1) Video conference server, its realization of the main features include: preside over the meeting, handling meetings, end meetings, The client, its main function is to attend the meeting, participation file management operation.
(2) On the network using SIP protocol and IP multicast technology to achieve the multi-point between media circulation letter. System development by using the technology mainly include Java multimedia technology, Java network programming, multicast technology, etc. A concrete realization features include: text transmission function, realization of meeting files in the transmission, and USES Java input/output
mechanism, on files uploaded, download, transmission and editing operations.
(3) Realized the audio and video conversation function, to realize the remote conversation function.
Adopt Java network programming technology as well as the IP multicast technique, the audio and video network transmission, uploading, ripping, format conversion operation.java技术介绍百度百科
The system after many tests, already in* environmental group's internal developement trends, operation stability is good. To the company on management to bring efficiency, save the management cost and improve the management efficiency.
Key words: video conference, SIP, RTP, Java technologies
目录
摘  要..............................................................II 目  录..............................................................IV 1 绪 论.. (1)
1.1研究背景及意义 (1)
1.2 国内外研究现状 (2)
1.2.1 国内外发展现状及存在的问题 (2)
1.2.2 视频会议发展趋势 (2)
1.2.3 某集团视频会议系统功能介绍及同类产品对比 (3)
1.2.4软件视频会议系统的前景 (4)
1.3 本文研究的目的及主要内容 (5)
2 关键技术分析 (6)
2.1 H.323通信标准概述 (6)
2.2 SIP与H.323的比较 (6)
2.2.1SIP的优越性 (7)
2.2.2 SIP协议简介 (8)
2.3 SIP消息概述 (9)
2.3.1 SIP请求消息 (9)
2.3.2 SIP响应消息 (10)
2.4 实时传输协议RTP (10)
2.5 java开发技术介绍 (11)
2.5.1 java多媒体技术 (11)
2.5.2 java网络编程技术 (12)
3 视频会议系统的分析及设计 (14)
3.1 需求分析 (14)

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