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G-11
Glossary
output of a Mix/Effects system, ready to
be placed (as a re-entry) on the switcher
Program output.
PROM (Programmable Read Only
Memory): An information storage device
on which the information once entered
cannot readily be changed. It is
nonvolatile memory such that power
conditions do not effect the information.
(Also see EEPROM, RAM, and ROM.)
Pulse Regenerator: A circuit which
accepts reference color black or another
composite color video input and processes
it to produce sync, blanking, subcarrier,
and burst flag (PAL only) reference pulses
for use within the switcher.
R
R-Y: The designator used to describe the
Red minus Luminance color portion of a
component video signal.
RAM (Random Access Memory): A
computer memory system that allows
rapid storage and retrieval of information.
It is (usually) considered volatile in that
the information is lost if power is
interrupted.
Raster: The area of a TV picture tube that
is scanned by the electron beam.
Real Time: Actual clock time in which
events occur.
Reboot: The process of re-loading the
computer operating program (see Boot).
Recall: To bring a setup from E-MEM
memory and set up a switcher with it.
Re-entry: Entry or apparent entry of a
processed video signal into another
processing circuit (e.g., Mix/Effects into
Program/Preset).
Register: A storage location in micro-
processor memory which is accessed for
storage or recall by one of the buttons on
the E-MEM keypad.
RGB: Red, green, blue; the three primary
colors used in video transmission/
reception, often referring to the three
(unencoded) color component outputs of a
color camera.
RGB Chroma Key: A key effect in which
the key signal is derived from
chrominance information (hue and
saturation) contained in the RGB color
components of a video signal.
S
Saturation: The intensity of a color; the
degree by which the eye perceives a color
as departing from a gray or white scale of
the same brightness. A saturated color
does not contain any white.
Self Key: A key effect in which the same
video signal serves as both the key source
and the fill source.
Sequence: An operating mode which
allows automatic recalls of the contents of
a series of E-MEM registers.