Milestone XProtect Essential 2014 - Manual (Page 176)

Milestone XProtect ® Essential 2014 Administrator's Manual
www.milestonesys.com 176 Glossary of Terms
HyperText Transfer Protocol —standard for
exchanging files across the internet. HTTP is
the standard used for formatting and
transmission of data on the World Wide Web.
I
I/O
Input/Output: refers to the communication
between a computer and a person. Inputs are
the signals or data received by the system and
outputs are the signals or data sent from it.
I-frame
Short name for intra-frame. Used in the MPEG
standard for digital video compression. An I-
frame is a single frame stored at specified
intervals. The I-frame records the entire view
of the camera, whereas the frames that follow
(P-frames) record only the pixels that change.
This helps greatly reduce the size of MPEG
files. An I-frame is similar to a keyframe.
Image Server
A service that handles access to XProtect
Essential for remote users logging in with
Smart Client The Image Server service does
not require separate hardware as it runs in the
background on the XProtect Essential server.
The Image Server service is not configured
separately as it is configured through XProtect
Essential 's Management Application.
IPIX
A technology that allows the creation and
viewing of 360-degree panomorph (fisheye)
images.
J
JPEG
(Also JPG) Joint Photographic Experts
Group
—widely used lossy compression
technique for images.
K
Keyframe
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.
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 Essential for
recording and displaying video. The Monitor
application has been discontinued.