Cisco Cisco 4404 Wireless LAN Controller Manual Técnico
million pixels.
Monitor
A CRT used to display live and recorded
analog video.
analog video.
Monitoring
The transmission of an alarm, trouble, and
other signals to a remote location such as a
security operations center.
other signals to a remote location such as a
security operations center.
Motion
Detection
(Video)
Detection
(Video)
A process that analyzes the video signal of
a camera in order to determine if there is
any movement (pixel changes) in the
picture and then subsequently triggers an
alarm.
a camera in order to determine if there is
any movement (pixel changes) in the
picture and then subsequently triggers an
alarm.
Network Video
Recorder
(NVR)
Recorder
(NVR)
A PC or network appliance that runs special
software used to capture and store images
that emanate from IP cameras and
encoders. An NVR differs from a DVR in
that it provides no encoding of analog video
signals. In other words, it has no video
inputs. Typically the NVR attaches to the
source over an IP network in order to
acquire video. See also Digital Video
Recorder.
software used to capture and store images
that emanate from IP cameras and
encoders. An NVR differs from a DVR in
that it provides no encoding of analog video
signals. In other words, it has no video
inputs. Typically the NVR attaches to the
source over an IP network in order to
acquire video. See also Digital Video
Recorder.
NTSC
(National
Television
Systems
Committee)
(National
Television
Systems
Committee)
A committee that worked with the FCC to
formulate the standards for the United
States color television system. NTSC
specifies a resolution of 480 lines at 30
frames per second. See also PAL.
formulate the standards for the United
States color television system. NTSC
specifies a resolution of 480 lines at 30
frames per second. See also PAL.
Physical
Security
Security
The use of personnel, equipment, and
procedures to control the access to a facility
and its assets.
procedures to control the access to a facility
and its assets.
PTZ (Pan-tilt-
zoom)
zoom)
Describes the capability to change the field
of view of a camera through three planes of
reference. Pan means to physically sweep a
camera from side-to-side (xy-plane),
whereas tilt is the ability to move it up-and-
down (azimuth). Zoom changes the lens
magnification of a camera, which gives the
visual effect that the point-of-focus is closer
or further away.
of view of a camera through three planes of
reference. Pan means to physically sweep a
camera from side-to-side (xy-plane),
whereas tilt is the ability to move it up-and-
down (azimuth). Zoom changes the lens
magnification of a camera, which gives the
visual effect that the point-of-focus is closer
or further away.
Resolution
A measure of the ability of a camera,
encoder or video system to reproduce
detail. In analog systems, resolution usually
refers to the number of lines that make up
an image. Whereas with digital systems,
resolution gives a measure of the number of
pixels used to generate the image.
encoder or video system to reproduce
detail. In analog systems, resolution usually
refers to the number of lines that make up
an image. Whereas with digital systems,
resolution gives a measure of the number of
pixels used to generate the image.
Security
The command center where security