Milestone XProtect Enterprise 2014 Manuel d'utilisateur télécharger pdf (Page 204)

Milestone XProtect

®

Enterprise

2014

Administrator's Manual

www.milestonesys.com

204

Glossary of Terms

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

When you add a digital camera to your system,

you are not adding the camera itself only, but

rather hardware devices. Hardware devices

have their own IP addresses or host names.

Being IP-based, your system primarily

identifies units based on their IP addresses or

host names.

Even though each hardware device has its

own IP address or host name, you can attach

several cameras, microphones and speakers

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.

You can configure each camera, microphone

and similar channels on the hardware device

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.

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

Enterprise 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 Enterprise server.

The Image Server service is not configured

separately as it is configured through XProtect

Enterprise '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

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