Milestone XProtect Enterprise 2014 Manuel d'utilisateur télécharger pdf (Page 205)

Milestone XProtect

®

Enterprise

2014

Administrator's Manual

www.milestonesys.com

205

Glossary of Terms

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.

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 Enterprise 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.

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

together with I-frames. An I-frame, also known

as a keyframe, is a single frame stored at

specified intervals. The I-frame records the

entire view of the camera, whereas the frames

that follow (the P-frames) record only the

pixels that change. This helps greatly reduce

the size of MPEG files.

PIN

Personal identification number (or personal

identity number)—number used to identify and

authenticate users.

Ping

A computer network administration utility used

to determine whether an IP address is

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