Closed-circuit television (CCTV) is a specialized system used in facilities, allowing the transmission of images and sound at a distance. It can be used to monitor production processes, quality control or safety supervision. Closed-circuit television differs from consumer television primarily in its technical parameters and specialized purpose. It often uses cameras with high resolution and resistance to harsh working conditions.
Monitoring based on CCTV is used in a very wide range, from private houses, farm buildings, through shops and shopping centers, to street monitoring.