Cisco 4116 - EtherFast Switch Design Manual page 66

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H
Horizontal Resolution
I
Image Size (Lenses)
IP or Network Camera
IP Video Surveillance (IPVS)
Iris
J
Joystick
K
Keypad
L
Level Control
M
Manual Iris Lens
Matrix Switch
Mega-Pixel Camera
Monitor
Monitoring
Motion Detection (Video)
N
Network Video Recorder (NVR)
NTSC (National Television
Systems Committee)
P
Physical Security
The maximum number of individual picture elements that can be distinguished in a
single scanning line.
Reference to the size of an image formed by the lens onto the camera pickup device.
The current standards are: 1", 2/3", 1/2", 1/3" and 1/4" measured diagonally.
A video imaging device that natively attaches to an Ethernet network and delivers its
images in IP packets. It differs from its analog equivalents in that it does not require an
external encoder to translate the video into a digital signal nor to attach to the IP
network.
Refers to the system or process of monitoring an area by using an IP network as the
transport for remote video signals. The components of an IPVS system include edge
devices such as IP cameras, IP encoders, or DVRs; an IP network for transport;
recording devices such as NVRs; monitoring stations including monitors and consoles
served through decoders or PCs running monitoring software; and management
software for configuration and maintenance.
A camera's eye. An adjustable opening that controls the amount of light entering a
camera from its lens projected onto the camera's imager.
The part of a surveillance system console that allows an operator to steer a camera into
different positions.
A device that provides a user interface to control a security system or subsystem.
Typically includes a numerical 10-key touchpad to allow entering of passcodes and
commands. See also Console.
Main iris control. Used to set the auto-iris circuit to a video level desired by the user.
After setup, the circuit will adjust the iris to maintain this video level in changing lighting
conditions. Turning the control toward High will open the iris; toward Low will close the
iris.
A lens with a manual adjustment to set the iris opening (F stop) in a fixed position.
Generally used for fixed lighting applications. (See also Fixed Iris Lens.)
A video signal device able to route any of its inputs (i.e. cameras) to any of its outputs
(i.e. Monitors and recorders). Through a matrix switch, the relation of inputs to outputs
is a one-to-one connection unless a looping device is introduced. The actual number of
inputs to outputs is generally not one-to-one. Inputs usually exceed the number of
outputs available. Matrix switches are usually located at a security operations center,
where all video concentrates and displays on multiple monitors. Users control the matrix
via a joystick and keyboard that allows switching and the remote control of pan-tilt-zoom
cameras.
An IP camera capable of providing extremely detailed image resolution (on the order of
HDTV quality). Mega-pixel loosely refers to a single image as containing multi-million
pixels.
A CRT used to display live and recorded analog video.
The sending of alarm, trouble, and other signals to a remote location such as a security
operations center.
The process of analyzing a camera's video signal to determine if there is any movement
(pixel changes) in the picture and then subsequently trigger an alarm.
A PC or network appliance running special software used to capture and store images
emanating 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 acquires video by attaching to the source over an IP network. (See
also Digital Video Recorder.)
A committee that worked with the FCC in formulating the standards for the United
States color television system. NTSC specifies a resolution of 480 lines at 30 frames
per second. (See also PAL.)
The use of personnel, equipment, and procedures to control the access to a facility and
its assets.
Design Guide
VI
Page-VI