Design And Implementation Of Video Monitor System For Public Security Based On Metropolitan Area Network

With the population and rapid development of network in our China, the flourishing video monitor system which is based on network has become a new typical multimedia application.The video monitor system for Lishui city's public security based on MAN (Metropolitan Area Network) utilizes the present computer network frame to transfer, store and share the monitored scope needed video, audio and data information in digital form, which can make the leader and related departments obtain real-time , precise and intuitionistic information of the monitored scope. The video monitor system provides full-oriented monitoring and kinescope for the monitored scope in 24 hours. And if a crime happens with nobody warning, the recording data can offer some help for the later investigation of the crime.The video monitor system for Lishui city's public security is based on MAN of China Telecom. The MPLS (Multi-Protocol Label Switching) VPN(Virtual Private Network) is applied to consists the system network for police. The IP-based MPLS VPN has become one of the most promising solutions in today's data-network reconstruction field, with its strong security, good extensibility, low payment, high flexibility, QoS ensuring and preferred ability for traffic engineering.The video monitor system for Lishui city's public security based on MAN has been finished in Lishui city, and also been checked and accepted. By using the video monitor system for public security, the police can fast and deal with law cases which happen abruptly and sometime have colony characteristics by unifying command, fast action and cooperating work. The research result of the paper has a great signality of practical engineering and a valuable reference for application of the IP-based video communicaton technology is provided.