The Developing And Realizing Of Remote Monitoring System On Audio And Video Frequency

The remote monitoring system on audio and video frequency, an important part in security technology system, is used in many fields, because of its visualization, convenience, abundance of information. But there are many deficiencies in traditional monitoring system. Basing on the standard of security technology, we study the composing of system network and designing of software.According to the difference of function and hardware linking way, remote monitoring system is often divided into two topologies, that is, bus and star. We make the designing method of system model. The system is made up of control center and extensional control computer. The system is developed on the platform of Visual C++ and the software model is made. The software system is divided into several modules, which are independent and interconnected. Using the fashionable system architecture of client/sever alleviates the difficulty of system developing and makes clients use it conveniently. Disposing and transmitting great deal of audio and video frequency data becomes very difficult because of the real time requirement on the remote monitoring system. The audio and video frequency data is compressed into a standard MPEG format. The strategy of data transmitting from monitoring spot to control center is compressing and coding the analog signals into digital signals, then transmitting the digital signals in the available digital communication circuit. Because TCP/IP is not suitable to transmit the data of audio and video frequency, the strategy of data transmitting from server to client is using TCP to transmit controlling signals and adopting UDP/RTP to transmit real time sound and image data.Controlling the remote monitoring point is an important target in the system, and it is necessary to depend on serial port programming. How to complete serial communication programming efficiently is one of the most fundamental and pivotal factors in software system. Microsoft Foundation Class doesn't provide such a class that can operate serial port, so itis inconvenient and difficult to develop serial communication program about interface of hardware. Based on the programming thinking of object-oriented, this paper tells a general method of serial communication program designing, which enhances the stability and expansibility of the remote monitoring system.