Closed-circuit television (CCTV), also known as video surveillance, is the use of video cameras to transmit a signal to a specific place, on a limited set of monitors. Such systems are mostly used for surveillance in areas that require additional security or ongoing monitoring.
A CCTV system consists of a camera, monitor, and a recorder. The camera picks up the images, which are then transmitted to a recording device and then a monitor. CCTV security camera systems are categorized into Analog and IP(digital) systems.
With analog surveillance systems, your standard analog camera is connected to a digital video recorder (DVR) via transmission cables. The DVR receives the video from the camera, compresses it, and then stores it on a hard drive for either live viewing or later viewing. This setup also allows you to transport the video over the internet for remote viewing. The DVR is used to compress, convert, store, and stream the video.
In an IP configuration, the camera itself does the compressing and converting of the video and it is streamed directly to someone’s computer over an internet connection.
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