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The development of reel-to-reel media enabled the recording of surveillance footage.These systems required magnetic tapes to be changed manually, which was a time consuming, expensive and unreliable process, with the operator having to manually thread the tape from the tape reel through the recorder onto an empty take-up reel.
In recent years, the use of body worn video cameras 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.Large-scale CCTV installations have played a key part of the defences against terrorism since the 1970s.Cameras have also been installed on public transport in the hope of deterring crime, and in mobile police surveillance vehicles, often with automatic number plate recognition, and a network of APNI-linked cameras is used to manage London's congestion charging zone.is the use of video cameras to transmit a signal to a specific place, on a limited set of monitors.
It differs from broadcast television in that the signal is not openly transmitted, though it may employ point to point (P2P), point to multipoint (P2MP), or mesh wired or wireless links.Today, systems cover most town and city centres, and many stations, car-parks and estates.However, several researchers have pointed to methodological problems associated with this research literature.There are about 350 million surveillance cameras worldwide as of 2016. The growth of CCTV has been slowing in recent years. Very little is known about Vericon except it was advertised as not requiring a government permit.