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Digital video surveillance become an integral part of engineering systems. Modern equipment surveillance system allows not only to observe and record occurring events, but also to react entire security system in an emergency. With the advent of computer technology in security systems, except as a direct surveillance, it is possible to save the video, lasting several weeks.
Depending on the type of equipment used video surveillance systems can be divided into digital and analog.
Security CCTV systems are designed for visual observation of the protected object with a video camera. Systems CCTV can monitor simultaneously for one or several objects. Cameras CCTV can be installed both indoors and outside. The problem of security video surveillance system is in a visual representation of video on the operational situation in the controlled object.
The simplest system video includes provide one or more video cameras and a monitor or TV. Cameras CCTV may be installed in slewing devices outside or inside the premises and allow around the clock tracking of a protected area. Together with the video surveillance system can use motion sensors (detectors), lighting systems and other additional devices.
In CCTV, designed to use several cameras on the screen single monitor can simultaneously display images from all cameras. To do so, Quad (divisors of the screen). For serial output images using multiplexers (switches), which consistently connect the camcorder to a monitor or TV.
Security / CCTV allow a flexible and expandable security system, which may include not only the components of video security systems and burglar and fire alarm and access control systems.
CCTV used to improve effectiveness of protection and installed where necessary to conceal surveillance. Target CCTV systems - not to study visitors, and monitor the situation in the protected area.
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