Tektronix Grass Valley 3000 - Manual (Page 263)

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Glossary
A
Abort: An instruction used to terminate
execution of a computer program or
routine.
Accumulating Latch: Electronic
circuitry that allows several signals to be
latched on at the same time and then
combined to produce a compound effect.
Active Video: The portion of a video
signal that contains picture information.
Array: A series of like items arranged in
an intersecting pattern, such as a RAM
array.
ASCII: American Standard Code for
Information Interchange.
Aspect: The ratio between the width and
the height of an object such as a wipe
pattern or a video screen.
Assembly: A major part of a system that
consists of more than one component. For
example, the main control panel is an
assembly within the Model 3000 Switcher.
(Also see Component and System.)
Asynchronous: A mode of computer
operation where the CPU immediately
begins a new task upon completion of the
previous task. (Also see Synchronous.)
Audio Mixer: An electronic device that
takes audio signals from any of several
sources (such as microphones, tape
recorders, etc.) to produce audio effects.
(Also see Switcher, Video.)
Auto Transition: A smooth or linear
electronically-produced transition made
by pressing a pushbutton (
[AUTO TRAN] )
instead of moving a lever arm.
B
B-Y: The designator used to describe the
Blue minus Luminance color portion of a
component video signal.
Background Color Suppression
(BCS):
A chroma key feature which
enhances the appearance of chroma keys
by suppressing unwanted halo effects.
Background Generator: A video
generator that produces a solid-color
output which can be adjusted for hue,
saturation, and luminance. The output of
the generator is the color background
signal applied to a primary input.