Swann 2K Series Instruction Manual page 59

Glossary
VCA (Video Content Analysis): Is a new method for triggering recording and
events. This uses the image processing system of the DVR or NVR & camera
to set specific triggers for recording (such as line crossing or intrusion). This
system does use more processing power, therefore it may not be available on
all devices.
Video Loss:
Is regarded as a potential alarm event and is considered to occur
any time your DVR or NVR doesn't receive an active video signal from any one
of its video inputs.
Video Quality Diagnostics:
Enables your DVR or NVR to alert you if the cam-
era has a blurred image, abnormal brightness or unwanted tint in the image
due to the lighting and white balance of the camera (known as Color Cast).
Video Stream: Indicates that your DVR or NVR is recording a video stream
only.
WDR (Wide Dynamic Range):
Is technology to balance out images that have
a large dynamic range. An example of this situation would be if an indoor
camera were pointing towards a window or building entrance. The image
produced by the camera during the day would be extremely washed out due
to the high brightness of the incoming light.
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