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Glossary
G-11
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.
Shadow (Dropshadow): A title
enhancement consisting of a shadow effect
along one edge of the title key or along one
edge and the bottom of the key.
Signal-to-Noise Ratio: A measurement of
the relative amount of noise present in an
audio or video signal.
SMPTE: Society of Motion Picture and
Television Engineers.
SMPTE Component Standard: A color
difference video standard outlined by
SMPTE, expressed in terms of Y, R-Y, and
B-Y.
Soft Edge: A wipe pattern edge between
two video signals in which the signals
dissolve into each other for a soft
transition effect.
Software: Computer programs. (Also see
Hardware and Firmware.)