Closed-circuit television(CCTV), also known asvideo surveillance,is the use ofto transmit a signal to a specific place, on a limited set of monitors. It differs fromin that the signal is not openly transmitted, though it may employ point-to-point (P2P), point-to-multipoint (P2MP), orwired or. Even though almost all video cameras fit this definition, the term is most often applied to those used forin areas that require additional security or ongoing monitoring. (is seldom called “CCTV”)
Surveillance of the public using CCTV is common in many areas around the world. In recent years, the use ofcameras has been introduced as a new form of surveillance, often used in law enforcement, with cameras located on a police officer’s chest or head.Video surveillance has generated significant debate about balancing its use with individuals’even when in public.
In, CCTV equipment may be used to observe parts of a process from a central. 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, using(DVRs), provides recording for possibly many years, with a variety of quality and performance options and extra features (such asand email alerts). More recently, decentralized, perhaps equipped with megapixel sensors, support recording directly todevices, or internal flash for completely stand-alone operation.
By one estimate, there will be approximately 1 billion surveillance cameras in use worldwide by 2021.About 65% of these cameras are installed in Asia. The growth of CCTV has been slowing in recent years.The deployment of this technology has facilitated significant growth in state surveillance, a substantial rise in the methods of advanced social monitoring and control, and a host of crime prevention measures throughout the world.