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ALI-DVR1004E Series 960H DVR User Manual
APPENDIX A
Glossary
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.
HDD
: Acronym for Hard Disk Drive. A storage medium which stores digitally encoded data on platters with magnetic surfaces.
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.
HTTP
: Acronym for Hypertext Transfer Protocol. A protocol to transfer hypertext request and information between servers and
browsers over a network
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.
Hybrid DVR
: A hybrid DVR is a combination of a DVR and DVR.
NTP
: Acronym for Network Time Protocol. A protocol designed to synchronize the clocks of computers over a network.
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 an NTSC signal contains 525 scan lines at 60 Hz.
DVR
: Acronym for Digital Video Recorder. An DVR can be a PC-based or embedded system used for centralized management and
storage for analog cameras, analog Domes and other DVRs.
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 50 Hz.
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.
USB
: Acronym for Universal Serial Bus. USB is a plug-and-play serial bus standard to interface devices to a host computer.
APPENDIX A: GLOSSARY
Summary of Contents for ALI-DVR1004E 960H
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