Gatekeeper G4-504HD2a, Руководство пользователя

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Glossary 5 of 151
GLOSSARY
Term/Abbreviation Description
DVR Digital Video Recorder – a device which records audio and video input
from the cameras and stores it to a hard disk drive and/or an SD card
for retrieval and viewing.
G-Sensor G-Sensor is a motion sensor that can measure the linear acceleration
of the vehicle.
GPS Global Positioning System – it is a radio navigation system that allows
land, sea, and airborne users to determine their exact location, velocity,
and time 24 hours a day, in all weather conditions, anywhere in the
world.
H.264 Also known as MPEG-4 Part 10, Advanced Video Coding (MPEG-4
AVC), this is a video coding format that is currently one of the most
commonly used formats for the recording, compression, and
distribution of video content.
HDD Hard Disk Drive – a high capacity data storage mechanism used for
storing and retrieving large amounts of digital data. It is one of the
primary storage mediums used by the digital video recorder for
storing the recorded audio and video, the other being SD cards.
ICD / ICD2 Interactive Control Display, purpose built touch screen monitors for
operating Gatekeeper Systems DVRs.
IO Input/Output
IP Camera An Internet protocol camera, or IP camera, is a type of digital video
camera commonly employed for surveillance, and which, unlike analog
closed circuit television cameras, can send and receive data via a
computer network and the Internet.
IR Remote A handheld, wireless controller used to operate the DVR using light
signals in the infrared (IR) range. Infrared light requires line of sight to
its destination.
LAN Local Area Network – it is a computer network that interconnects
computing devices within a limited area such as a school, work area,
or an office building.
LCD Monitor Liquid Crystal Display Monitor – it is a display screen that uses
electronically modulated segments controlling a layer of liquid crystals
and arrayed in front of a light source (backlight) or reflector to produce
images and text.
MAC Address Media Access Control address – it is a unique identifier assigned to
network interfaces for communications on the physical network
segment.