Applied Research And Digital Network Surveillance System

With the developing of the society, economy and standard of living, safety precautions system, watching and controlling system, becomes more focused and used widely. It becomes the symbol of intelligentization and autoimmunization of security, anti-transgress.Video frequency is very important in the security systems. Safeguards can view and record the circumstantialities by using the Video recording equipment that make cracking criminal cases more easy. Actually, figures and pictures recorded by camera usually become blur and cannot be recognized after transmission of long distance. Furthermore, there are many limiting factor for transferring figures of long distance and wide area.The author provides answer of two notable problems to above questions. Improving the figure quality through wave filtration, commutation, ' smoothing, and building up can make the system more practical and credible. Using visual telephone, meeting TV, and some other appropriative equipment on telecom net, computer net, and can cable casting net can make it true to transfer the video figures. These entire technique boosts up the ability of the system and broaden the application area. At the end of the article, author addresses that the orientation of security system developing in the future is digitalization.