Milestone XProtect Go 2014 - Manual (Page 207)

Milestone XProtect ® Go 2014 Administrator's Manual
www.milestonesys.com 207 Glossary of Terms
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
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.
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 Go 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 Go 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 Go 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 Go
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.
PTZ
Pan-tilt-zoom. A highly movable and flexible
type of camera.
PUK
Personal Unblocking Key or PIN Unlock Key —
number used as an extra security measure for
SIM cards.
R