UTC TruVision IP Dome Manual de usuario descargar pdf (Pagina 159)

TruVision DVR 60 User Manual 153

Appendix G

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.

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

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

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

HTTP Acronym for Hypertext Transfer Protocol. A protocol to transfer hypertext

request and information between servers and browsers over a network

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.

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.

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 network.

1 2 ... 154 155 156 157 158 159 160 161 162 163 164

Sin comentarios

UTC TruVision IP Dome Manual de usuario Pagina 159