【作者】 刘新生；

【导师】 黎洪生；

【作者基本信息】 武汉理工大学 ， 控制理论与控制工程， 2007， 硕士

【摘要】 视频监控以其直观、方便、内容丰富的特点广泛应用于安保场合，成为交通、水利，社区安防等领域安全防范的重要手段。近几年来，随着通信技术、多媒体技术及网络技术的飞速发展，视频监控技术也取得了质的飞跃，从早期的模拟监控时代进入了数字监控时代，呈现出多样化的发展趋势。基于对视频监控系统的历史、现状和发展趋势的研究，本文采用海康HC400X图像采集卡为硬件平台，完成了多媒体数字视频监控采集子系统的研究与设计。该子系统主要由视频采集模块、本地播放模块和网络传输模块和基于GPRS短信传输报警等组成。本文依据实时监控网络的特点，提出了基于HC400X的新型视频监控系统的构架，添加GPRS网络报警的新型系统。对系统的构架进行了研究，把系统分为服务器端、中心站、监控前端；介绍了服务器端，中心站，监控前端的系统组成。本文详尽阐述了中间站的架构和程序流程，对服务器端监控中心进行分析，阐述了系统功能。系统采用DirectShow技术实现本地播放功能。详细论述了Filter Graph组件的构造过程，以及媒体文件的装载、各个输出针的连接、过滤器表和DirectShow传输的设计与实现。论述了数字图像处理的方法，以及视频压缩的必要性，压缩原理等。详尽的阐述了常用的压缩技术：预测编码和变换编码。论述了软件的实现。论文通过Winsock编程方法和多线程机制实现了视频数据的网络传输。允许两个或者多个应用程序或进程在同一台机器上或通过TCP/IP普通网络协议建立网络通信，可以运行于所有Windows平台之上。而多线程机制的使用，使得应用程序的编码、传输、解码同时进行，有效地提高了图像传输效率。同时论述了基于GPRS的短信报警的传输，以及短信报警的实现。论文阐述了HC400X的特性，并阐述了这种系统的独特性—短信报警。论述了系统本地回放的实现，及创建回放媒体文件的Filter，装载媒体文件，获取FilterGraph的各个控制接口。更多还原

【Abstract】 Because of it’s specialty of immediacies, convenience and exuberance, video surveillance becomes strong measure in security defense fields such as production management, traffic, finance, residence and community. Video monitoring technology has evolved quickly in recent years with the rapid development of communication technology, multimedia technology and network technology. Now it steps into digital monitoring state, and takes on a multiform trend.Based on the research of video monitoring system’s history, actuality and trend. HC400X is adopted as hardware platform. The research and design of gather subsystem of multimedia digital video monitoring has been completed. There are main modules such as video gather module, local play module and network transmission module and GSM transmission based on GRPS in this subsystem.According to real-time monitoring network specialty, put forward a new monitoring system based on HC400X,that is "GSM alarm". The system has been divided into three part: sever, center stage ,front port for monitoring and controlling. The system can been realized local monitoring and controlling, network monitoring, GSM alarm based on GRPS. Thesis has been described hiberarchy of system and hiberarchy’s function , such as framework and work flow of center stage,analyze the function of sever monitoring system.Adopt DirectShow technology in design of local play module,which also is an innovation of thesis.According to construct theory of Filter,we finished the formation of Filter Graph module, the loading of media file, the link of output Pins,the building of filter and transfering of directshow. Discuss digital image processing, necessary of video compressing and principle of video compressing. Introduce some common technique of video compressing, just like forecasting coding and switching coding. Discuss realization of software.Achieved the network transmission of video by adopting Winsock programme method and multithreading mechanism. Winsock is not a network protocol, but an open network program interface supporting multi-protocol, which offers a communication port in computer. With the help of this port computer can communicate with every computer that has a Socket port. In the same way, the application of multithreading can make the progress of encode, transmission, decode happen together, and which advance the efficiency of image transmission.Thesis has been set forth characteristic of HC400X and special characteristic of system—GSM alarm. Discuss realizing of local replay. Create filter of replay media, load media file, get controlling interface of filter graph.更多还原