Research On High-definition Digital Video Surveillance System

With the recent "Green City", "Green Campus" security projects launching a nationwide and in-depth, as well as road traffic, public security, subway, and scenic etc, for high definition video surveillance system requirements on the rise. High-speed, real-time processing of dedicated digital media processing chips based, high resolution, high bit-rate image sensor featuring high-definition digital video surveillance systems are gradually replacing the traditional ordinary video surveillance system.Intelligent traffic in the past, conventional video surveillance took shoot, record, and processing to number plate of all passed vehicles. Be restricted by the definition of camera resolution and image acquisition equipment. The pictures only include the figure, color, number plate and velocity of the car. But the public security enforcement expects to dominate more particular and distinct information in investigating and collecting of some public security and traffic accident cases. For example, facial feature of the driver, the information of driver's cab, clear figure of the car and the wagonload etc.This article describes a high-definition digital video surveillance system reality,hardware platform adopt TMS320DM642 based network camera designs, the chip with abundance peripheral interfaces, its operating systems, communication protocols, internet protocol video process software are all in a TMS320DM642 to complete. Video capture options is an OmniVision's CMOS image sensor chip OV3630. OV3630 with 3.2 million effective pixels, containing the black/white balance, auto focus, image stabilization, gamma correction, on-chip window functions.Firstly, this article introduces the development process of video surveillance system, analyzes the research status and present the theory. Secondly, according to the functional needs of the overall structure carried out the system design. Key features of the system and then conducted a detailed analysis of the module, with Altium Designer software on the system a complete circuit design, given a appropriative circuit diagram.The practical application of that system is well designed, can achieve a variety of scheduled function.