CCTV is the use of video cameras to send a signal to a specific location, on a limited set of screens. It differs from broadcast television in that the signal is not transmitted openly, although it may use P2P or P2P. "P2MP", wired network, or wireless connections, and although nearly all video cameras fit this definition, the term is often applied to those used for surveillance in areas that may need to be monitored such as banks, stores, and other areas that require security .
Surveillance using CCTV cameras is common in many regions around the world, and in recent years the use of body-worn video cameras has been introduced as a new form of surveillance.
In industrial facilities also, CCTV equipment can be used to monitor operational parts of a central control room, for example when the environment is not suitable for humans, CCTV systems may operate continuously or only as needed to monitor a specific event using DVRs and recording for potentially many years, with a variety of quality and performance options and additional features (such as motion detection and email alerts).
Recently, decentralized “IP” cameras that may be equipped with “megapixel” sensors support recording directly to network-attached storage devices, or internal flash for completely independent operation, and there are about 350 million surveillance cameras around the world as of 2016 “installed About 65% of these cameras are in Asia."Course Objectives