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en | Glossary of CCTV Terms Camera, DVR, and VIP products
AR18-08-B000 | | Version 1.0 | 2008.08 Glossary of CCTV Terms Bosch Security Systems
Tri-streaming A Bosch encoding technology that generates two separate MPEG-4 video streams and one
MJPEG stream simultaneously. This advanced streaming capability enables the user to tune
live viewing and recording requirements independently to meet specific site and enterprise
requirements.
TTL Time-To-Live: Life cycle of a data packet in station transfers.
U
UDP User Datagram Protocol: One of the core protocols of the Internet Protocol suite. Using UDP,
programs on networked computers can send short messages, sometimes known as
datagrams, (using Datagram Sockets) to one another. UDP is sometimes called the Universal
Datagram Protocol.
URL Uniform Resource Locator: Previously Universal Resource Locator. The unique address for a
file that is accessible on the Internet.
UTP Unshielded Twisted Pair: A variant of twisted pair cabling, UTP cable is not surrounded by any
shielding. The wires in a twisted pair cable are twisted around each other to minimize
interference from the other twisted pairs in the cable. UTP is the primary wire type for
telephone usage and the most commonly used type of networking cable.
V
Virtual Masking A unique Bosch technology that creates invisible motion masking areas. These invisible masks
are similar to privacy zones but only the camera’s algorithms can see them. This allows the
camera to ignore areas of unwanted motion.
VMD Video Motion Detection: An algorithm for motion detection in which the camera compares the
current image with a reference image and counts the number of pixels (
see
Pixel) that have
changed between the two images. An alarm is generated when the number of pixel changes
exceeds a user-configured threshold.
W
WAN Wide Area Network: A long distance link used to extend or connect remotely-located local area
networks.
X
XF-Dynamic A highly accurate, 15-bit digital signal processing technology from Bosch that extends the
dynamic range of Dinion
XF
cameras. XF-Dynamic optimizes the detail in both the high and low
light areas of the scene simultaneously, maximizing the information visible in the picture.
Z
Zoom Changing the effective focal length to allow different fields of view to fill the picture area.
Zoom can be optical, where the lens is adjusted, or digital, where a portion of the view
selected is magnified electronically.