With the development of computing technique, the digital technique has been used more and more in the video surveillance system, which greatly improves the performance of the system. It also makes many applications come true, such as process monitoring, multi-function auto alarming, multimedia data indexing and multi-frame high quality displaying.Video surveillance system has experienced two main stages: local monitoring and network monitoring. Local analog signals were first used in early video surveillance system, which was controlled by SCM and sensitive to transmission distance. As different products may use different communication protocols, it was very hard to make up a huge surveillance system. With the fast developing of network transmitting and digital error control techniques, it becomes possible for users to manage... |