Research Of Video Monitoring System Based On HC400X

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.