Glossary - Swann pro-series hd Instruction Manual

Glossary

3D-Noise Filter: Is an enhanced form of digital noise reduction. The advance-
ment in technology enables noise to be filtered even more effectively from
the image, even in low light conditions.
50Hz:
Is the mains frequency used in the UK, Australia and most European
countries.
60Hz:
Is the mains frequency used in the United States, Canada and some
Latin American countries.
AGC (Automatic Gain Control):
matically boost the gain control so that people and objects can be seen more
clearly. The advantage of this technique is that your camera will produce im-
ages in much lower light conditions. The downside is that the amplification
will increase the video noise visible.
Anti-flicker: As fluorescent lighting operates at the same frequency as your
mains power, this will cause luminance flicker when viewed through the
camera. Enabling the anti-flicker options available can reduce or eliminate
the flicker that is visible.
Anti-smearing: A smear effect means that a bright vertical line originating
from a bright light source appears in the image. This happens especially with
back lighting. Enabling this allows people and objects to be seen correctly
against a very bright background.
Auto DNS (Domain Name System):
translates them into internet protocol addresses. For example, www.google.
com will have a DNS server address that is equivalent to 74.125.224.72. For
this option, the DNS server is automatically provided by your internet service
provider.
Auto-focus:
Will adjust the lens of your camera to focus on an object being
viewed.
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In low light conditions, the camera will auto-
A service that stores domain names and
Bandwidth:
In computer networks, bandwidth is used as a synonym for data
transfer rate, the amount of data that can be carried from one point to an-
other in a given time period (usually a second). Network bandwidth is usually
expressed in bits per second (bps).
Bitrate:
The amount of data that your DVR or NVR will use to record video.
The higher the bitrate, the more space each recording will consume on the
hard drive. Increasing this will also consume more bandwidth when stream-
ing. Unit of measurement is either Mbps (megabits per second) or kbps (kilo-
bits per second).
BLC (Back Light Compensation):
front of a light source. It does this by splitting the whole image into different
regions, and then applying separate exposure levels to those regions.
Brightness:
This changes how light the image appears to be. Its value is dif-
ferent in darkness to that in daylight. For example, the lights from car head-
lights appears to be brighter at night.
CDS:
This allows the image to be set by the camera's light sensor. A CDS sen-
sor is basically a resistor that changes its resistive value (in ohms) depending
on how much light is shining onto the sensor.
Compound Stream:
Indicates that your DVR or NVR is recording video and
audio at the same time.
Contrast:
This increases the difference between the blackest black and the
whitest white in the image. Without contrast you wouldn't have an image be-
cause there wouldn't be any differentiation between light and dark.
Covert:
The camera will detect motion and trigger your DVR or NVR to re-
cord, but you will not see an image of the camera in Live View mode.
Improves exposure of an object that is in
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