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F R E Q U E N T L Y
A S K E D
Q U E S T I O N S
What is NightSense?
NightSense is a method of boosting the sensitivity of the high-resolution
Dinion color camera by 9dB (a factor of 3!) by combining all the signals
of the color image in a single monochrome picture. It senses when the
light level has dropped and automatically switches to monochrome
mode.
What is Auto Black compensation?
Auto Black Compensation is a technique of boosting the video signal
level so that a full amplitude video signal is produced even when the
scene contrast is less than the full range. The darkest part of the signal
is set to black and the lightest part to white, thus increasing the contrast.
What is Mains/Line lock, and why is it important?
CCTV pictures are made up of 25 (or 30 for NTSC/EIA) frames per
second. In order to get a steady transition of images on the monitor
when switching cameras, each camera needs to start its frame at
exactly the same time. If frames start randomly, it is possible that a
picture appears to bounce when switching cameras. The starting point
of the frame is fixed by locking it to the mains/line frequency of the
power supply.
P H I L I P S C C T V C A M E R A S
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