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What is CCTV and what is included in it

This is a set of equipment including video cameras and recorders, which is created as a closed personal system for recording and broadcasting video. From English CCTV, Closed Circuit Television is a closed loop television system. If we talk about the very concept and phenomenon of shooting for the purpose of observation, then the list of equipment has changed over the years, and today it has a great variety depending on the purpose of observation and the place of installation.
Development

Conventionally, the beginning of development can be considered the use of photography for the purpose of ensuring security, as was done in 1913 in the Holloway prison. In 1942 Siemens created a system for monitoring V-2 missile tests, and in fact it was the first application of video surveillance, which allowed to increase the safety of employees during research and work.

Paket CCTV surveillance systems

Then, after 1956, the era of civil video surveillance begins, and a "Zauberspiegel" ("magic mirror") was installed in Hamburg. It made it possible to remotely monitor traffic and switch traffic signals. Gradually, similar technologies began to be introduced in other countries, mainly to help the police work.

In the 1980s, camcorders are getting smaller, CCDs instead of CRTs appear, and the ability to shoot in color. And 10 years later, the well-known CMOS matrices were developed. Digital systems are gaining more and more popularity, with analog signals being digitized for easier recording.

In 1998, a face recognition system was installed for the first time in Newham, London. The subsequent development of this technology gives a new impetus to the improvement of security systems, mass video surveillance and control, making it possible to identify individual citizens without the use of people on the ground.

Equipment
Cameras



  •     Modular video camera - a device in the form of a printed circuit board.

  •     Mini-video camera - in square or cylindrical cases.

  •     Box camera - Box camera.

  •     Dome camera, also known as Dome camera.

  •     Controlled (PTZ or high-speed cameras) - consists of a camera, zoom and PTZ device.

  •     Gyro-stabilized ones are used on moving objects.



There are also analog and digital. Most digital cameras are IP cameras.

Lenses are divided into:



  •     monofocal - fixed focal length lenses;

  •     variofocal (zoom) - lenses with a variable focal length.


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