Bosch 100 Series Manuel de référence - Page 44
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Glossary of CCTV camera terms
Mode switching
Possibility to program three different
parameter sets in a camera. Switching
from one mode to another can be
manually or automatically.
MPEG-4
MPEG-4 is a graphics and video
compression algorithm standard that is
based on MPEG-1, MPEG-2 and Apple
QuickTime technology. MPEG-4 files are
smaller than JPEG or QuickTime files,
so they are designed to transmit video
over a narrower bandwidth.
Night Sense
NightSense is a method of boosting
the sensitivity of high-resolution Dinion
color cameras by 9 dB (a factor of 3!)
by combining the signals of the color
image in a single monochrome picture.
NTSC
An acronym for National Television
Standards Committee. The color video
and broadcasting standard used mainly
in North and Central America, and
Japan. The screen resolution is 525
lines, and the refresh rate is 60 Hz.
PAL
An acronym for Phase Alternating Line.
The color video and broadcasting
standard used mainly in Europe and
Asia. The screen resolution is 625 lines,
and the refresh rate is 50 Hz.
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Pixel
The microscopic photosensitive
elements of a CCD image sensor.
Power over Ethernet
A means for delivering power to
a remote device using the same cable
lines used to deliver Ethernet over
the Ethernet Category 5 or higher
data cabling.
Privacy masking
The ability to mask out a specific area
to prevent it from being viewed in
order to comply with privacy laws
and particular site requirements.
Programmable privacy zones allow
specific parts of a scene to be blocked.
Remote set-up
Configuring the camera from a distance
e.g. via the coax cable.
Resolution
The measure of the fine detail that can
be seen in an image. In a CCD camera
this is determined.
Saturation
The amplitude of the chrominance signal
affecting the vividness of a color.
Sens-up
Sens-up is used to increase sensitivity
by integrating the signal from a number
of consecutive frames to reduce noise.