The CCTV
Glossary
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EBU. European Broadcasting
Union.
EIA.
Electronic Industries Association, which changed in 1997 to Electronic
Industries Alliance,
which has recommended the television
standard used in the US, Canada and Japan, based on
525 lines interlaced scanning.Formerly
known as RMA or RETMA. It also specifies the RS data standards.
Encoder. A device
that superimposes electronic signal information on other electronic
signals.
Encryption. The rearrangement
of the bit stream of a previously digitally encoded signal in a
systematic fashion to make the
information unrecognizable until restored on
receipt
of the
necessary authorization key.
This technique is used for securing information transmitted
over a communication channel with
the intent of excluding all other than
authorized
receivers from interpreting the
message. Can be used for voice, video and
other
communications signals.
EI. Electronic Iris.
Electronic circuits in a camera that enable the camera shutter mode to
be
automatically controlled to vary
the output video level, much as an auto iris in the lens would
do. It enables manual iris
lenses to be used where light levels vary.
ENG camera. Electronic
News Gathering camera. Refers to CCD cameras in the broadcast
industry used for outside broadcasts
when gathering news.
EPROM. Erasable and
Programmable Read Only Memory. An electronic chip used in many
different security products that
stores software instructions for performing
various operations.
Equalizer. Equipment
designed to compensate for loss and delay frequency effects within a
system. A component
or circuit that allows for the adjustment of a signal
across a given band.
Ethernet. A local
area network used for connecting computers, printers, workstations,
terminals, etc. within the same
building. Ethernet operates over twisted wire and
coaxial
cable at speeds up to 100 Mbps
(100 Base T).
Eur. Ing. European
Engineer. A title conferred on Professional engineers, by the
European Federation of National
Engineering Associations (FEANI).
External synchronization.
A means of ensuring that all equipment is synchronized to the one
source.
EXABYTE. When written in capital
letters,
it is the name of a manufacturer of a tape based
mass storage device. When in lower case it is 2
to the 60th power
[260 or 1,152,921,504,606,846,976]
bytes. One exabyte is equal to 1,024 petabytes.
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