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Glossary – Tektronix Grass Valley 3000 User 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.