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Rather than continuously recording data, a VMS may also implement motion detection to reduce the amount of data to be recorded. In older analog security camera systems, the cameras were "dumb" devices only capable of producing a video signal continuously, and any video signal processing had to be done by the recording VMS.
In that case, the analogue video camera must be plugged directly into a video capture card in the computer, and the card then converts the analogue signal to digital. These cards are relatively cheap, but inevitably the resulting digital signals are compressed 5:1 (MPEG compression) for the video recordings to be saved on a continuous basis.
It is estimated to incorporate the video feeds of a total of 15,000 cameras. [164] The system is used by Chicago's Office of Emergency Management in case of an emergency call: it detects the caller's location and instantly displays the real-time video feed of the nearest security camera to the operator, not requiring any user intervention ...
Loop recording is the process of recording audio continuously to an endless tape (if magnetic tape is used) or to computer memory, or recording video feeds (such as from video surveillance or camera signals) on a video server. [1]
Recording at the edge is a network bandwidth-friendly approach because it does not use any network bandwidth in order to record video—instead the network is only used to play back audio or video from the edge at some review station. When the network includes a WAN or, worse still, the Internet, by definition Recording at the Edge becomes the ...
Extensive video surveillance systems were relegated to merely recording for possible forensic use to identify someone, after the fact of a theft, arson, attack or incident. Where wide angle camera views were employed, particularly for large outdoor areas, severe limitations were discovered even for this purpose due to insufficient resolution. [4]