Milestone XProtect Professional 2014 - Manual (Page 204)

Milestone XProtect ® Professional
2014
Administrator's Manual
www.milestonesys.com 204 Glossary of Terms
Used in the MPEG standard for digital video
compression, a keyframe is a single frame
stored at specified intervals. The keyframe
records the entire view of the camera, whereas
the frames between the keyframes record only
the pixels that change. This helps greatly
reduce the size of MPEG files.
M
MAC address
Media Access Control address —12-character
hexadecimal number uniquely identifying each
device on a network.
Manual events
You can generate an event manually from the
client. These events are called manual events.
Master/Slave
A setup of servers where one server (the
master server) is of higher importance than the
remaining servers (the slave servers). With a
master/slave setup in your system, you can
combine several XProtect Professional servers
and extend the number of cameras you can
use beyond the maximum allowed number of
cameras for a single server. In such a setup,
clients still have a single point of contact: they
connect to the master server but also get
access, transparently, to cameras and
recordings on the slave servers.
Matrix
A feature that enables the control of live
camera views on remote computers for
distributed viewing. Once configured, you can
view Matrix-triggered live video in XProtect
Smart Client.
Matrix recipient
A computer equipped with XProtect Smart
Client software and therefore capable of
displaying Matrix-triggered live video.
MJPEG
Motion JPEG —compressed video format
where each frame is a separately compressed
JPEG image. The method used is quite similar
to the I-frame method used for MPEG, but no
interframe prediction is used. This allows for
somewhat easier editing, and makes
compression independent of the amount of
motion.
Monitor
1) A computer screen. 2) An application used
in previous versions of XProtect Professional
for recording and displaying video. The Monitor
application has been discontinued.
MPEG
Compression standards and file formats for
digital video developed by the Moving Pictures
Experts Group. MPEG standards use so-called
lossy compression as they store only the
changes between frames, removing often
considerable amounts of redundant
information. Keyframes stored at specified
intervals record the entire view of the camera,
whereas the frames that follow record only
pixels that change. This helps greatly reduce
the size of MPEG files.
N
NTLM
In a Windows network, NT LAN Manager is a
network authentication protocol.
P
Panomorph
A type of lens that allows the creation and
viewing of 360-degree images.
P-frame
Predictive frame —the MPEG standard for
digital video compression uses P-frames