VIDEO SURVEILLANCE
Video Surveillance monitors and records activities from many areas of a building. A single security person can monitor many cameras located throughout the facility, across town or across the country.
The standard, for many years, has been Closed Circuit Television (CCTV) with each camera connected directly to the recorder and the monitor by a dedicated coaxial cable. The distance limitation for coaxial cable has been overcome by a new generation of cameras that transmit images using Internet Protocol (IP). IP Cameras use dedicated or shared internet circuits to transmit images literally around the world.
Analog signals and recording have been replaced by digital signals and recording that have a sharper and clearer image. Magnetic tape has been replaced by high-capacity hard drives. Cameras are typically color and have become much more compact. Many types of cameras are available with accessories that allow applications for nearly any situation. Options include:
- Pan, Tilt, Zoom (PTZ) to allow remote control of the camera
- Automatic iris adjustment for variable light conditions
- Heated housings with wipers for inclement conditions
- IP cameras that reduce bandwidth use by transmitting only when motion is detected
- Very small cameras for covert applications
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