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Closed-circuit television
Use of video cameras to transmit a signal to a specific place on a limited set of monitorsClosed-circuit television (CCTV), also known as video surveillance, is the use of closed-circuit television cameras to transmit a signal to a specific place, on a limited set of monitors. It differs from broadcast television because signal is not openly transmitted, though it may employ point-to-point, 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.
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Timeline
AI Generated- 1927An early mechanical CCTV system was developed by Russian physicist Léon Theremin.
- 1942An early CCTV system was installed by Siemens AG at Test Stand VII in Peenemünde, Nazi Germany, for observing the launch of V-2 rockets.
- 1949The first commercial closed-circuit television system became available in the United States from Remington Rand, designed by CBS Laboratories, called "Vericon".