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Closed Circuit Television
CCTV (Closed Circuit Television) is a closed circuit television system, that is, a system where video is not broadcast on public networks, but is shown only on a special receiver. It uses devices for recording, processing, storing and reproducing video information. We rarely use the term Jasa Pasang CCTV, but its synonym - video surveillance systems - is better known in wide circles. CCTV can be digital or analog.
Video surveillance as a technology industry has been around for a long time. However, twenty or even ten years ago, video surveillance was significantly different from modern standards. For a long time, an analog signal was used for video surveillance, that is, the observed scene was filmed by an analog camera, then the image was recorded by an analog video recorder, and after that the analog signal was fed to the monitors. Today, a pure analog system is no longer used anywhere, and most video surveillance systems are switching to digital or combined video filming. Another big step in the improvement of CCTV systems has been made by the development of local and global networks. This technology made it possible to separate the receiver and the camera over long distances, which is very convenient for video surveillance.
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