What is a video surveillance system?

Опубликовано в Актуальное

A video surveillance system is a complex of security devices designed for constant visual observation over the protected area. The Jasa Pasang CCTV includes a set of cameras, a recorder with a built-in recording device, a power supply, a video surveillance cable for transmitting information, a monitor and additional consumables required for installing the system.
What is a video surveillance system for?

The purpose of the installation of video surveillance is to create preventive measures to protect the territory, property, ensure the safety of citizens through minute-by-minute surveillance, both in real time and in subsequent viewing.

A video surveillance system is not a mechanical security device, it is one of the tools designed to organize security on the territory of an enterprise, office, store, cafe, etc. Also, the video surveillance system allows you to monitor the activities of employees in any room equipped with system elements.

Such a system can function both within the territory of one enterprise, and within the territories of several enterprises, thus creating a single network. Modern technologies provide the possibility of organizing remote access to the constructed video surveillance complex via the internet, which allows you to visually control the workflow from anywhere in the world if you have access to the internet.

How does a camcorder work?

A video surveillance camera is a necessary element of a video surveillance system, and ready-made sets of cameras consist of a lens, a matrix, a video signal processing board enclosed in a single housing. Thus, we can say that a video surveillance camera is a prototype of the human eye, originating as a camera obscura, later a camera and a video camera itself.

The lens is a focusing device for transferring the exposed objects to the matrix of the video camera. A matrix is a structured grid of pixels, each of which has specific coordinates. The predecessor of the matrix is photographic film, but the grains (pixels) on the substrate are evenly randomized and a chemical process is required to obtain an image after exposure, unlike a matrix, where the signal is converted into an electrical pulse, which is transmitted to the processing board.

The final device of the video camera is a processing board that processes the signal received from the matrix, converting it into a low-frequency signal of the unified standard PAL, SECAM, NTSC, etc.

The camcorder body combines all of the above devices and serves not only to protect them from the environment, but also is a means of protection from minor mechanical influences.