Appendix A Glossary - Honeywell HRG4X User Manual

Glossary
This appendix provides an explanation for commonly used terms in this guide.
DDNS:
a networked device, such as a router or computer system using the Internet Protocol Suite, to
notify a domain name server to change, in real time the active DNS configuration of its
configured host names, addresses, or other information stored in DNS.
DHCP:
devices (DHCP clients) to obtain configuration information for operation in an Internet Protocol
network.
Dual Stream:
transmitting a lower resolution stream over the network. The two streams are generated by the
DVR, with the main stream having a maximum resolution of 4CIF and the sub-stream having a
maximum resolution of CIF.
DVR:
cameras, compress the signal and store it on its hard drives.
HDD:
magnetic surfaces.
HTTP:
between servers and browsers over a network
Hybrid DVR:
NTP:
over a network.
NTSC:
in such countries as the United States and Japan. Each frame of an NTSC signal contains 525
scan lines at 60Hz.
NVR:
centralized management and storage for IP cameras, IP Domes and other DVRs.
PAL:
systems in large parts of the world. PAL signal contains 625 scan lines at 50Hz.
PTZ:
left and right, tilt up and down and zoom in and out.
USB:
a host computer.
(Dynamic DNS) A method, protocol, or network service that provides the capability for
(Dynamic Host Configuration Protocol) A network application protocol used by
Dual stream is a technology used to record high resolution video locally while
(Digital Video Recorder) A DVR is device that is able to accept video signals from analog
(Hard Disk Drive) A storage medium which stores digitally encoded data on platters with
(Hypertext Transfer Protocol) A protocol to transfer hypertext request and information
A hybrid DVR is a combination of a DVR and NVR.
(Network Time Protocol) A protocol designed to synchronize the clocks of computers
(National Television System Committee) NTSC is an analog television standard used
(Network Video Recorder) An NVR can be a PC-based or embedded system used for
(Phase Alternating Line) PAL is also another video standard used in broadcast televisions
(Pan, Tilt, Zoom) PTZ cameras are motor driven systems that allow the camera to pan
(Universal Serial Bus) USB is a plug-and-play serial bus standard to interface devices to
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