User's Manual
357
ONVIF
Open Network Video Interface Forum (ONVIF) is the defined general
protocol for information exchange among the network video devices. It
includes search device, real-time audio/video, metadata, information
control, and so on.
PAL
Phase Alteration Line, this is a television standard that television scanning
beam is 625 beams, 25 frames per second, phase alteration, odd field first
and then it is followed by even field. PAL color encoding is used. PAL is used
in China, Europe, and so on.
PTZ
Pan Tilt Zoom (PTZ) refers to the PTZ all-direction movement, lens zoom,
and focus control.
RAID
RAID is an abbreviation for Redundant Array of Independent Disks. It is to
combine several independent HDDs (physical HDD) to form a HDD group
(logic HDD), to provide higher storage performance and data redundancy.
S.M.A.R.T
Self-Monitoring Analysis and Reporting Technology (S.M.A.R.T) is a technical
standard to detect HDD drive status and report potential problems.
SSH
Secure Shell (SSH) is a security protocol formulated by IETF network group
on the basis of application layer. SSH protocol can effectively prevent
information leakage problem during remote management.
SVC
Scalable Video Coding (SVC) is a video encoding technology. It can split the
video streams to one basic layer and several enhanced layers according to
the requirements. The basic layer provides the general video quality, frame
rate and resolution, and the enhanced layer is to perfect the video quality.
VGA
Video Graphics Array (VGA) is a video transmission standard. It has high
resolution, high display speed and abundant colors.
WLAN
Wireless Local Area Networks (WLAN) adopts radio frequency to realize data
transmission.
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