局域网视频监控系统的设计.doc

摘 要

视频监控融合了信息技术、计算机技术、网络技术和流媒体技术，一直是大家关注应用技术热点之一，它以其直观方便、信息内容丰富而被广泛应用于很多场所。在局域网内部实时传输视频已经得到广泛应用。现在用以传输视频局域网大多数是有线局域网，因为有线局域网技术成熟，传输速度快，稳定性好。不过视频数据量大，有线网络也会出现工作不稳定，引发数据堵塞，时间久了会造成严重延迟现象；假如工作环境不固定，要求移动性，那么就要采取无线网络，现在无线网卡工作随环境改变而变得不稳定，这么会造成视频传输质量大幅度下降，轻易引发画面重影、抖动、花屏等现象。本文针对不一样局域网，提出一个通用实时视频传输处理方案，使用VC++自封装Windows VFW SDK软件开发包进行二次开发，经过Divx编解码，根据制订传输策略，能够有效地处理因为网络局部不稳定造成视频图像重影、抖动、花屏等问题。
关键词：VFW；WinSock，Divx

ABSTRACT

Video surveillance integration of information technology, computer technology, network technology, as well as streaming media technology, has been a concern of the application of technology hot spots, which facilitate its intuitive, information rich in content and are widely used in many occasions. In-house real-time transmission of video local area network has been widely used. Now for the video transmission is the most wired LAN LAN, wired LAN because the technology is mature, fast speed, good stability. However, a large quantity of video data, cable networks will also be job insecurity, caused by blockage of data, over time will cause serious delay; if the working environment is not fixed, request mobility, then they would have used a wireless network, wireless network card is now work with the changes in the environment becomes unstable, so that video transmission will lead to a significant decline in the quality, easily lead to re-screen video, jitter, and so on. In this paper, a different local area network, a common real-time video transmission solutions, the use of VC + + since the package of Windows VFW SDK software development kit for the secondary development, through the Divx codec, the transmission in accordance with the development of strategies to effectively solution as a result of network instability caused by the partial video image ghosting, jitter, and so on
Key words: VFW, WinSock，Divx
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目 录
第1章 绪论 1
1.1 课题背景 1
1.2 课题发展现实状况 1
1.3 课题目标和意义 3
1.4 论文关键内容 3
第2章 基础概念介绍 4
2.1 VC++介绍 4
2.1.1 C++ 4
2.1.2 VC++ 4
2.2 MFC介绍 4
2.3 VFW体系结构 5
2.4 TCP/IP协议介绍 6
2.5 DIVX编码介绍 6
2.6 SOCKET套接字 9
2.6.1 SOCKET套接字引入 9
2.6.2 异步非阻塞 9
2.7 本章小节 10
第3章 局域网视频监控系统方案设计 11
3.1 系统总体方案设计 11
3.2 视频捕捉方案设计 12
3.2.1 视频捕捉方案选择 12
3.2.2 AVICap窗口类 13
3.2.3 视频传输软件步骤设计 14
3.3 视频传输方案设计 15
3.3.1 传输层协议选择 15
3.3.2 TCP协议具体介绍 16
3.3.3 套接字方案设计 19
3.3.4 位图信息头介绍 19
3.4 开发平台和工具选择 20
3.5 本章小节 21
第4章 局域网视频监控系统实现 22
4.1 视频采集实现 22
4.1.1 视频捕捉 22
4.2 视频传输实现 23
4.2.1 视频传输 23
第5章局域网视频监控系统代码设计 25
5.1 服务器端代码设计 25
5.2 用户端代码设计 23
第6章 局域网视频监控系统测试分析 30
6.1 系统测试 30
6.2 系统不足之处 33
6.3 系统以后改善 33
结论 34
致谢 35
参考文件 36
附录A 37
附录B 41

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