Glossary - Swann DVR-1580 Instruction Manual

Glossary

3D-Noise Filter - Is an enhanced form of digital noise reduction. The
advancement in technology enables noise to be filtered even more ef-
fectively from the image, even in low light conditions.
50Hz
- Is the mains frequency used in the UK, Australia and most Euro-
pean countries.
60Hz
- Is the mains frequency used in the United States, Canada and
some Latin American countries.
AGC (Automatic Gain Control)
automatically 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 images 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 frequen-
cy as your mains power, this will cause luminance flicker when viewed
through the camera. Enabling the anti-flicker options available can re-
duce or eliminate the flicker that is visible.
Anti-smearing - A smear effect means that a bright vertical line orig-
inating 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)
and 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
- A service that stores domain names
Bitrate - The amount of data that your DVR will use to record video or
stream to the app. The higher the bitrate, the more space each record-
ing will consume on the hard drive. Increasing this will also consume
more bandwidth when streaming to apps and software.
BLC (Back Light Compensation)
is in 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 different in darkness to that in daylight. For example, the lights from
car headlights appears to be brighter at night.
CDS
- This allows the image to be set by the camera's light sensor. A
CDS sensor is basically a resistor that changes its resistive value (in
ohms) depending on how much light is shining onto the sensor.
Contrast
- This increases the difference between the blackest black and
the whitest white in the image. Without contrast you wouldn't have an
image because there wouldn't be any differentiation between light and
dark.
DDNS (Dynamic DNS)
- Is a service that converts IP addresses into host
names (using a host name is a lot easier than trying to remember an IP
address). This makes DDNS a good fit for home networks, which nor-
mally receives an IP address from the ISP that will change occasionally.
DHCP (Dynamic Host Configuration Protocol)
server or router to enable dynamic assignment of an IP address to a
device connected to the network.
Display Resolution
- Is the number of pixels supported by your HDTV or
VGA monitor. 1920 x 1080 resolution will give you the best display quality.
- Improves exposure of an object that
- Uses an appropriate
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