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

Milestone XProtect

®

Professional

2014

Administrator's Manual

www.milestonesys.com

205

Glossary of Terms

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

available, by sending a small amount of data to

see if it responds. The word ping was chosen

because it mirrors the sound of a sonar. You

send the ping command using a Windows

command prompt.

Polling

Regularly checking the state of something, for

example, whether input has been received on

a particular input port of a device. The defined

interval between such state checks is often

called a polling frequency.

Port

Logical endpoint for data traffic. Networks use

different ports for different types of data traffic.

Therefore it is sometimes, but not always,

necessary to specify which port to use for

particular data communication. Most ports are

used automatically based on the types of data

included in the communication. On TCP/IP

networks, port numbers range from 0 to 65536,

but only ports 0 to 1024 are reserved for

particular purposes. For example, port 80 is

used for HTTP traffic, which is used when

viewing web pages.

POS

(Also PoS) Point of sale: the physical place

where a sale is made, for example, at the cash

register.

Post-recording

The ability to store recordings from periods

following motion and/or specified events.

Based on incoming video being buffered on

the XProtect Professional server in case it is

going to be needed for a motion- or event-

triggered recording. Using post-recording can

be highly advantageous: if, for example, you

have defined that video should be recorded

while a gate is open, being able to see what

happens immediately after the gate is closed

may also be important.

Pre-alarm

Pre-alarm images is a feature available for

selected cameras only. It enables the sending

of images from immediately before an event

took place from the camera to XProtect

Professional via e-mail.

Pre-buffer

See the description of Pre-recording.

Pre-recording

The ability to store recordings from periods

preceding detected motion and/or specified

events. Based on incoming video being

buffered on the XProtect Professional server in

case it is going to be needed for a motion- or

event-triggered recording. Using pre-recording

can be highly advantageous: if, for example,

you have defined that video should be

recorded when a door is opened, being able to

see what happened immediately prior to the

door being opened may also be important.

Privacy masking

The ability to define if and how selected areas

of a camera's view should be masked before

distribution. For example, if an XProtect

Professional camera films a street, you can

mask certain areas of a building (for example,

windows and doors) with privacy masking in

order to protect residents' privacy.

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