Milestone XProtect Professional 2014 - Manual (Page 202)

Milestone XProtect ® Professional
2014
Administrator's Manual
www.milestonesys.com 202 Glossary of Terms
DirectX
A Windows extension providing advanced
multimedia capabilities.
DNS
Domain Name System —system allowing
translation between alphabetic host names (for
example, mycomputer) or domain names (for
example,
www.mydomain.com ) and numeric
IP addresses (for example, 192.168.212.2).
Many people find alphabetic names easier to
remember than numeric IP addresses.
Driver
A program used for controlling/communicating
with a device.
DST
Daylight saving time: temporarily advancing of
clocks during the summer so that afternoons
have more daylight and mornings have less.
Dual stream
Some cameras support two independent
streams (which can be sent to the recording
server): one for live viewing and another for
playback purposes. Each stream has its own
resolution, encoding, and frame rate.
DVR
Digital video recorder —device that records
video in a digital format to a hard disk drive
embedded in the DVR itself.
E
Event Server
A server that stores and handles incoming
alarm data and events from all XProtect
Professional servers. The Event Server
enables powerful monitoring and provides an
instant overview of alarms and possible
technical problems within your systems.
F
Fisheye
A type of lens that allows the creation and
viewing of 360-degree images.
FPS
Frames per second —measurement indicating
the amount of information contained in a
motion video. Each frame represents a still
image, but when frames are displayed in
succession, the illusion of motion is created.
The higher the FPS, the smoother the motion
appears. Note, however, that a high FPS may
also lead to a large file size when video is
saved.
Frame rate
A measurement indicating the amount of
information contained in motion video
—
typically measured in FPS.
G
Generic events
XProtect Professional can receive and analyze
input in the form of TCP or UDP data
packages which, if they match specified
criteria, can be used to generate events. Such
events are called generic events.
GOP
Group of pictures: individual frames grouped
together, forming a video-motion sequence.
Grace period
When you install your system, configure it and
add recording servers and cameras, your
system runs on temporary licenses. These
need to be activated before a certain period
ends. This is the grace period.
GUID