CCTV (closed-circuit television) is a TV system in which signals are not publicly distributed but are monitored, primarily for surveillance and security purposes.
CCTV relies on strategic placement of cameras and private
observation of the camera's input on monitors. The system is called
"closed-circuit" because the cameras, monitors and/or video recorders
communicate across a proprietary coaxial cable run or wireless communication
link. Access to data transmissions is limited by design.
Older CCTV systems used small, low-resolution black and white
monitors with no interactive capabilities. Modern CCTV displays can be
high-resolution color, providing the CCTV administrator with the ability
to zoom in on an image or track something (or someone). Talk CCTV allows the
administrator to speak to people within range of the camera's associated
speakers.
CCTV is commonly used for a variety of purposes, including:
·
Maintaining
perimeter security.
·
Monitoring
traffic.
·
Obtaining
a visual record of human activity.
The use of CCTV surveillance in public places has fueled privacy
concerns in many parts of the world
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