Analog video surveillance – the tried-and-tested classic

Analog video technology is the “classic” method of video surveillance – also known as CCTV (closed-circuit television). The analog picture data is transmitted via BNC cable from the camera to a recording system, where it is saved for display. The advantages of analog technology are that it does not depend of wireless or network bandwidths, it has an exclusive transmission path and is displayed in real time.

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Analog video surveillance components

  1. The picture data are “caught by” the lens. Its focal length is decisive for the angle of view of the camera and therefore the size of the recording area.
  2. The image sensor and the signal processor are integrated into the camera, in which the optical information is not only converted into digital signals, but also processed and optimized. The signals are converted back into analog signals for transmission.
  3. Analog CCTV signals are typically transmitted via coaxial cable.
  4. The classic way of displaying the picture data is on a monitor connected to a recorder. With the appropriate network, the data can also be displayed using Internet PCs or mobile end devices.

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