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Friday, December 23, 2005

Video Surveillance

(Courtesy CSO Magazine – Sep 2005)
Camera Speed Counts
How many frames per second do you need for your surveillance project? It depends. Thirty frames per second, used by televisions in the U.S., is the gold standard, but it’s often unnecessary, says Aaron Chesler, NiceVision’s director of sales for the Eastern region. But video quality with 15 fps is usually good enough he says. With 15 fps, you also use only half as much bandwidth and disk space (measured below in units).
Some typical frame rates:

Speed: 3.75 fps
Video quality: Jumpy
Uses: Commercial buildings, branch banks, ATMs
Storage required: 1 unit
Speed: 15 fps
Video quality: fairly smooth
Uses: Most applications (for example, train stations, airports, trading floors, call centers)
Storage required: 4 units
Speed: 24 fps
Video quality: smooth to the human eye, real-time
Uses: U.S. movies
Storage required: 6 units
Speed: 30 fps
Video quality: real-time
Uses: U.S. televisions, casino gaming floors, high-security government areas, military
Storage required: 8 units
This article is a part of the Surveillance Field Guide story titled "Hidden Camera"

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