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 is mainly used for surveillance purposes.
It differs from broadcast television in that the signal is not openly transmitted, though it may employ point to point (P2P), point to multipoint, or mesh wireless links. Though almost all video cameras fit this definition, the term is most often applied to those used for surveillance in areas that may need monitoring such as banks, casinos, airports, military installations, home security, business security and convenience stores.
In industrial plants, CCTV equipment may be used to observe parts of a process from a central control room, for example when the environment is not suitable for humans. CCTV systems may operate continuously or only as required to monitor a particular event. A more advanced form of CCTV, utilizing digital video recorders (DVRs), provides recording for possibly many years, with a variety of quality and performance options and extra features (such as motion detection and email alerts). Surveillance of the public using CCTV is particularly common in many areas around the world.
In recent years, the use of body worn video cameras has been introduced as a new form of surveillance especially by the police. It was seen as a cheaper way to deter crime compared to increasing the size of the police departments. Some businesses as well, especially those that were prone to theft, began to use video surveillance.
- Crime prevention.
- Industrial processes.
- Traffic monitoring.
- Transport safety.
- Control of retail.
- Use in schools.
- Home Security.
Some of the types of CCTV cameras are:-
- Infrared/Night vision.