Tektronix Grass Valley 3000 - Manual (Page 264)

G-2
Glossary
Background Transition: A transition
between signals selected on the
PROGRAM and PRESET background
buses or A and B Background buses.
Background Video: (1) Video that forms
a background scene into which a key may
be inserted. Background video comes from
the PROGRAM and PRESET background
buses, or from the A and B Background
buses in an M/E. (2) A video output
generated by the Background generator
within the switcher for use as background
video in key effects.
Back Porch: The portion of a video
signal that occurs during blanking from
the end of sync to the beginning of active
video.
Baud Rate: The transmission rate (in
bytes per second) of data between
communication devices such as
computers, modems, and/or printers.
BETA Format: A color difference video
format that uses the Y, R-Y, B-Y
components.
Binary: A numbering system based on
just two digits, 0 and 1. (Also see Hex and
Octal.)
Bit (Binary Digit): A single unit of
information in a storage device. (Also see
Byte and Word.)
Black: A black video output generated
within the switcher and selected by the
BLACK pushbuttons on the crosspoint
buses and by the PST BLK pushbutton.
Blanking: (1) The portion of the video
signal during which the picture is shut off
to keep the screen dark during vertical and
horizontal retrace. (2) A standard signal
from a television sync generator used to
create blanking in video.
Blanking Processor: A circuit which
strips blanking and sync from the source
video and replaces it with blanking and
sync from a reference source.
Boot: The process of loading a computer
operating system for use, usually
automatically (upon power up) or
manually (by pushbutton).
Border: A title enhancement in which a
matte is added around the holes cut by the
key signal.
Borderline®: A GVG electronic system
which produces a border around a title, an
outline of the title, a shadow alongside the
title, or an extrusion of the title.
Brightness: The relative intensity of
light determined by the sum of responses
of the eye to the component wavelengths.
Buffer: An isolating component used to
eliminate the loading of a driving circuit
by the circuit(s) being driven.
Bus: A circuit which provides a path for
the transfer of information from any of
several sources to any of several
destinations.
Bus Master: The device currently in
control of the bus in a system where