Camera, DVR, and VIP products
Glossary of CCTV Terms | en
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Bosch Security Systems
Glossary of CCTV Terms
AR18-08-B000 | | Version 1.0 | 2008.08
CVBS
Composite Video Blanking and Sync: The format of an analog television (picture only) signal
before it is combined with a sound signal and modulated onto an RF carrier. Composite video
is often designated by the CVBS acronym, meaning any of Color, Video, Blank, and Sync,
Composite Video Baseband Signal, Composite Video Burst Signal, or Composite Video with
Burst and Sync. It is usually in a standard format such as NTSC, PAL, or SECAM.
D
Day/Night (IR sensitive)
A camera that has normal color operation in situations where there is sufficient illumination
(day conditions), but where the sensitivity can be increased when there is little light available
(night conditions). This is achieved by removing the infrared cut filter required for good color
rendition. The sensitivity can be further enhanced by integrating a number of frames to
improve the signal-to-noise ratio of the camera.
Default Shutter
A feature allowing the shutter speed to be set to a fast speed to eliminate motion blur and
provide a detailed and clear image of fast-moving objects while there is sufficient light. When
light levels fall and other adjustments have been exhausted, the shutter speed reverts to the
standard setting to maintain sensitivity.
DHCP
Dynamic Host Configuration Protocol: Uses an appropriate server to enable dynamic
assignment of an IP address and other configuration parameters to computers on a network
(Internet or LAN).
Digital Image Stabilization
See
Image Stabilization
Dinion
A high-performance, smart surveillance camera series designed by Bosch utilizing 10 and 15-
bit digital video processing.
Divar
The Bosch Divar digital video recorder (DVR) series are compact, low profile units that
combine advanced digital recording and multiplexing.
DNR
Dynamic Noise Reduction: A digital video processing technique that measures the noise
(image artifacts) in the picture and automatically reduces it.
DNS
Domain Name System: A service that stores domain names and translates them into Internet
Protocol (IP) addresses.
Duplex
Term used to define the direction of data transmission between two parties. Half-duplex
allows data transmission in both directions but not simultaneously. Full-duplex allows
simultaneous data transmission.
E
Ethernet
The most commonly used local area network (LAN) access method. Ethernet complies with
the IEEE 802.3 standard. The Ethernet standard supports 10 Mbps, 100 Mbps, 1000 Mbps,
and 10 Gb (Gigabit) data transmission rates.
EnviroDome
Camera with environmental protection that allows it to be used outdoors in almost any
climate.