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This kind of system is likewise called a "closed circuit tv" system, abbreviated CCTV. This permits you to observe a location remotely, without in fact having to be there personally. You will require numerous electronic cameras, each linked to its own display. This gets pricey, however, and multiple monitors use up area.

This permitted a user to display 4, 9, or sixteen video cameras on a single screen by dividing the screen into equal rows of two, three, or four electronic cameras each. Initially, video was taped using a videocassette recorder, or VCR. VCRs were an action forward for the surveillance industry, however using them properly provided many challenges.

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A standard T-120 VHS tape might only hold about 24 hr of video approximately. To stretch this out, a workaround needed to be discovered. What we believe of as video is just several still images displayed in fast succession, one after another. In North American television systems, video is defined as a system that displayes thirty photos, or frames, every second.

They could be set to record 15 FPS (frames per second), 7 FPS, 3 FPS, or 1 FPS. Some VCRs might be set to tape a single frame every other second! Using time lapse VCRs permitted us to save 960 hours on a single basic T-120 VHS tape. Nevertheless, time lapse recording made it hard to solve crimes.

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After VCRs, digital video recorders, or DVRs, were introduced. In the monitoring market, a DVR is a gadget that digitizes analog video. Transforming the video from an analog signal to a digital one provides us a lot more choices not possible with analog, VCR based recording. Firstly, disk drives, even little ones, enable substantially longer recording times than VHS tapes.

Third, once a signal is digital, it can be transferred over the Internet. That suggests that any PC with a Web connection, anywhere on the world, ends up being a viewing station, which you're never out of touch no matter how far away you go. Ultimately,  Check For Updates  of DVR called the pentaplex DVR was established.