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Saturday, April 10, 2021

Closed-circuit television

Use of video cameras to transmit a signal to a specific place on a limited set of monitors

Closed-circuit television
Closed-circuit television

Closed-circuit television (CCTV), also known as video surveillance, is the use of video cameras to transmit a signal to a specific place, on a limited set of monitors. It differs from broadcast television in that the signal is not openly transmitted, though it may employ point-to-point (P2P), point-to-multipoint (P2MP), or mesh wired or wireless links. Even though almost all video cameras fit this definition, the term is most often applied to those used for surveillance in areas that require additional security or ongoing monitoring. On another note, videotelephony is seldom called "CCTV" which is one exception to the use of video in distance education, where it is an important tool.

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