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Acronym for Integrated Circuit.
Acronym for International Communications Industries
In a graphical user interface, an on-screen symbol that
represents a program file, date file or some other computer
entity or function.
(Internal Computer Wiring Kit)
ICWK kits provide interfacing signals for computers
and terminals with no external video display output.
Internal video monitor signals are routed externally
from the terminal, usually to a 9 pin connector. From
the 9 pin connector, a short cable is included with
the kit for signal transfer to the interface 9 pin connector
Acronym for Increased Definition Television - Example;
Image Light Amplifier - Used in their large screen projectors,
a Hughes/JVC device that uses low-intensity images to
modulate high-intensity light through a liquid crystal
The opposition or "load" to a signal. Circuits
that generate audio or video signals, are designed to
work with a certain "load", or impedance.
Typical video impedance's: 75 ohm or High Z. Also see
High Impedance and Low Impedance.
When connecting devices in a system, it is important
that the impedance specifications are adhered to. If
impedance's are not matched, there could be undesirable
results, such as: loss or distortion of the original
signal, reflections, etc.
The fusion of video and computer technology. A video
program and a computer program running in tandem under
the control of the user.
A device or module that operates as a link between other
dissimilar modules, usually because those modules cannot
communicate directly with each other. An interface acts
like a translator, or interpreter, and could be in the
form of hardware and/or software. A Video Interface
allows computer-video to be used by large screen video
The process of scanning whereby the alternate lines
of both scanned fields fall evenly between each other
every 1/30th of a second.
The process of assigning consecutive physical memory
addresses alternately between two memory controllers
in order to increase transfer rate.
The processing of data representing information and
the manipulation of the processed data.
The ability to choose interactively any data segment
and have a computer locate it.
A type of wireless transmission standard that uses infrared
(invisible) light. IR light can travel about 30 feet.
Combining many circuits into one module.
(Definition from Tektronix)
Generally speaking, a "connect-the-dots" processing
technique to estimate what a fast waveform looks like
based on only a few sampled points. More specifically,
Interpolation refers to the way the oscilloscope calculates
values for record points when the oscilloscope cannot
acquire all the points for a complete record with a
single trigger event. That condition occurs when the
oscilloscope is limited to real time sampling and the
time base is set to a value that exceeds the effective
sample rate of the oscilloscope. The oscilloscope has
two interpolation options: linear or sin(x)/x interpolation.
Linear interpolation calculates record points in a straight-line
fit between the actual values acquired. Sin(x)/x computes
record points in a curve fit between the actual values
acquired. It assumes all the interpolated points fall
in their appropriate point in time on that curve.
Data transferred from its source to a computer. To transmit
information from its source to a computer.
Services Digital Network
A CCITT standard for integrated transmission of voice,
video and data. Bandwidths include: Basic Rate Interface
- BR (144 Kbps - 2 B & 1 D channel) and Primary
Rate - PRI (1.544 and 2.048 Mbps). Integrated Services
Digital Network. A set of protocol and interface standards
that effectively constitute an integrated (voice, video,
and data) telephone "network." These standards
promote global availability and compatibility of ISDN
products and services. The two types of ISDN discussed
in this Guide are Basic Rate Interface (BRI) and Primate
Rate Interface (PRI). ISDN BRI (ISDN Basic Rate Interface)
is the interface to connect the desktop to the digital
long distance network. ISDN BRI provides two 64Kbps
B ("bearer") channels to carry information
content, the voice, video and data substance of a transmission.
A separate 16Kbps D ("data") channel is used
for call setup and signaling. ISDN BRI is often called
"2B+D" ISDN, for its combination of two B
and one D channel. This service is marketed and supported
by the LECs. ISDN PRI (Primary Rate Interface) is the
ISDN equivalent of a T-1 circuit. It provides 23B+D
(in North America) or 30B+D (in Europe) running at 1.544
Mbps and 2.048Mps, respectively. Each channel (time
slot) is 64Kbps. One channel is reserved as the D channel;
the other 23, as bearer channels (23+D).
Employing the active participation of the user in determining
the flow of the multimedia program. An interactive system
can exchange formation with the user, process the user's
input, and act in response.
Combining video and computer technology under the control
and direction of the user. In interactive video, the
user's actions and decisions determine the sequences.
To connect normally incompatible components so that
the signal from one is readable by the second. Often
transmitting one standard or language to a device which
recognizes another, different standard or language.
A technique used for the display of live video and some
computer graphics. Originally intended to allow use
of lower cost monitors. Most video display devices write
the picture to the screen using vertically stacked horizontal
lines representing thin horizontal slices of the intended
image. With interlacing first the odd lines are written
to the screen from top to bottom, then the even lines
are filled in. Interlacing is used to reduce flicker
which is caused when the first field fades while the
next is being written, resulting in half faded lines
next to freshly drawn lines.
Input/Output - Refers to the flow of information or
signals (in and out) with respect to a computer or other
Configured projector participating on the LAN.
A type of wireless transmission standard using infrared
light. Infrared or non-visible electromagnetic heat
Acronym for Institute of Radio Engineers.
An oscilloscope scale that applies to composite video
levels. 1 Volt Peak - Peak Video is divided up into
140 IRE units. This is done to make numbers for luminance
levels easier to communicate. The amplitude of the video
signal from blanking (zero volts) to peak white is 0.714286
volts or 100 IRE units. Synchronization signals extend
from blanking to - 1.285714 volts/ - 40 IRE units.
Acronym for Integrated Services Digital Network.
Quality standard (International Standards Organization).
Quality standard (International Standards Organization).
International Telecommunications Union; one of the specialized
agencies of the United Nations and founded in 1865 before
telephones were invented as a telegraphy standards body.
Interexchange Carrier. Long-distance carrier providing
service between local area exchanges (LECs). AT&T,
are IECs. The services an IEC provides may be interstate
or intrastate, as long as it's between local areas.
Interexchange carrier, long distance service providers
in the U.S. that provide inter-LATA service.