Chapter 20 Appendix; Glossary - HIKVISION DS-7716NXI-I4/16P/4S User Manual

DS-77xxNXI-I4/16P/4S NVR User Manual

Chapter 20 Appendix

20.1 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 device, 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 that 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 requests and information
between servers and browsers over a network
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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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PPPoE: Stands for "Point-to-Point Protocol over Ethernet." PPPoE is a network configuration used to
establish a PPP connection over Ethernet protocol.
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Hybrid Device: A hybrid device is a combination of a DVR and device.
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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
countries such as the United States and Japan. Each NTSC signal frame contains 525 scan lines at 60 Hz.
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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 devices.
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PAL: Acronym for Phase Alternating Line. PAL is another video standard used in broadcast television
systems in large parts of the world. The PAL signal contains 625 scan lines at 50 Hz.
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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.
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