LT Security LTN7600 Series NVR (V2.2.3) - Manual (Page 202)

User Manual of DS-9600/8600/7700/7600 Series NVR
202
Glossary
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Dual Stream: Dual stream is a technology used to record high resolution video locally
while 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.
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HDD: Acronym for Hard Disk Drive. A storage medium which stores digitally encoded
data on platters with magnetic surfaces.
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DHCP: Dynamic Host Configuration Protocol (DHCP) is a network application protocol
used by devices (DHCP clients) to obtain configuration information for operation in an
Internet Protocol network.
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HTTP: Acronym for Hypertext Transfer Protocol. A protocol to transfer hypertext request
and information between servers and browsers over a network
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PPPoE: PPPoE, Point-to-Point Protocol over Ethernet, is a network protocol for
encapsulating Point-to-Point Protocol (PPP) frames inside Ethernet frames. It is used
mainly with ADSL services where individual users connect to the ADSL transceiver
(modem) over Ethernet and in plain Metro Ethernet networks.
•
DDNS: Dynamic DNS is a method, protocol, or network service that provides the
capability for 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 (ad-hoc) the active
DNS configuration of its configured hostnames, addresses or other information stored in
DNS.
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Hybrid DVR: A hybrid DVR is a combination of a DVR and NVR.
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NTP: Acronym for Network Time Protocol. A protocol designed to synchronize the clocks
of computers over a network.
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NTSC: Acronym for National Television System Committee. NTSC is an analog television
standard used in such countries as the United States and Japan. Each frame of anNTSC
signal contains 525 scan lines at 60Hz.
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NVR: Acronym for Network Video Recorder. An NVR can be a PC-based or embedded
system used for centralized management and storage for IP cameras, IP Domes and other
DVRs.
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PAL: Acronym for Phase Alternating Line. PAL is also another video standard used in
broadcast televisions systems in large parts of the world. PAL signal contains 625 scan
lines at 50Hz.
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PTZ: Acronym for Pan, Tilt, Zoom. PTZ cameras are motor driven systems that allow the
camera to pan left and right, tilt up and down and zoom in and out.
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USB: Acronym for Universal Serial Bus. USB is a plug-and-play serial bus standard to
interface devices to a host computer.