A video surveillance system (closed cable television systems, CCTV) is a hardware and software system designed for video surveillance. Local system is a system, the scope and application of which is limited geographically by the territory of a building, enterprise, organization, etc. The centralized system has one center and a number of video cameras. A decentralized system presents itself as a collection of several centralized ones, logically united into one structure, but physically separated and capable of functioning independently. The most widely used standards are ONVIF and PSIA.