Milestone M50 - Manual (Page 199)

Milestone Husky M30/M50 Administrator's Manual
www.milestonesys.com 199 Glossary of Terms
criteria, can be used to generate events. Such
events are called generic events.
GOP
Group of pictures: individual frames grouped
together, forming a video-motion sequence.
Grace period
When you install your system, configure it and
add recording servers and cameras, your
system runs on temporary licenses. These
need to be activated before a certain period
ends. This is the grace period.
GUID
Globally unique identifier —unique 128-bit
number used to identify components on a
Windows system.
H
H.264
A standard for compressing and
decompressing video data (a codec). H.264 is
a codec that compresses video more
effectively than older codecs, and it provides
more flexibility for use in a variety of network
environments.
Hardware device
Technically speaking, cameras are not added
to Milestone Husky product, rather to hardware
devices. This is because hardware devices
have their own IP addresses or host names.
Being IP-based, Milestone Husky product
primarily identifies units based on their IP
addresses or host names. Even though each
hardware device has its own IP address or
host name, several cameras, microphones,
and so on, can be attached to a single
hardware device and share the same IP
address or host name. This is typically the
case with cameras attached to video encoder
devices. Each camera, microphone, and so on,
can be configured individually, even when
several of them are attached to a single
hardware device.
Host
A computer connected to a TCP/IP network. A
host has its own IP address, but may
—
depending on network configuration —also
have a host name to make it easily
identifiable.
Hotspot
Particular position for viewing enlarged and/or
high quality video in the Smart Client.
HTTP
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 Milestone
Husky product 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 Milestone Husky product
server. The Image Server service is not