GE Security TruVision DVR 60, User Manual

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TruVision DVR 60 User Manual 135
Appendix D
Glossary
Term Definition
Data redundancy
Writing data to two or more locations for backup and data recovery. For
example, data can be stored on two or more HDDs.
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.
DVR
Acronym for Digital Video Recorder. A DVR is device that is able to accept
video signals from analog cameras, compress the signal and store it on its
hard drives
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
DHCP
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 networ
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 NVR
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 60Hz
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.