Closed-circuit television (CCTV) is the use of video cameras A video camera is a camera used for electronic motion picture acquisition, initially developed by the television industry but now common in other applications as well. The earliest video cameras were those of John Logie Baird, based on the electromechanical Nipkow disk and used by the BBC in experimental broadcasts through the 1930s. All- to transmit a signal to a specific place, on a limited set of monitors.
It differs from broadcast television Terrestrial television is a mode of television broadcasting which does not involve satellite transmission or via underground cables—typically through the atmosphere from a transmitting antenna. . The term is more common in Europe, while in the United States it is referred to as broadcast television in that the signal is not openly transmitted, though it may employ point to point wireless links. CCTV is often used for surveillance Surveillance is the monitoring of the behaviour, activities, or other changing information, usually of people and often in a surreptitious manner. It most usually refers to observation of individuals or groups by government organizations, but disease surveillance, for example, is monitoring the progress of a disease in a community in areas that may need monitoring such as banks, casinos, airports, military installations, and convenience stores.
In industrial plants, CCTV equipment may be used to observe parts of a process from a central control room; when, for example, 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 A digital video recorder or personal video recorder (PVR) is a device that records video in a digital format to a disk drive or other memory medium within a device. The term includes stand-alone set-top boxes, portable media players (PMP) and software for personal computers which enables video capture and playback to and from disk. Some consumer (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 the UK, where there are reportedly more cameras per person than in any other country in the world.[1] There and elsewhere, its increasing use has triggered a debate about security versus privacy.
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NBC Dallas-Fort Worth
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