Matrox DigiSuite LE, Installation Manual, Page: 127 / 140

115
Glossary of terms
have an aspect ratio of 0.9, and PAL pixels have an
aspect ratio of 1.067. On DigiSuite with the wide
screen 16:9 format, NTSC pixels have an aspect
ratio of 1.185, and PAL pixels have an aspect ratio
of 1.422.
posterization
An effect that reduces the
various luminance levels of an image so that it
looks flat or two-dimensional, somewhat like a
poster or paint-by-number picture.
proc amp
An electronic device that adjusts the
different aspects of a video signal, such as its hue,
saturation, and contrast.
R
realtime effect
An effect that is played back
instantly, without having to be rendered by an
editing program. Also called hardware-
accelerated effect. Compare with software effect.
render
To compute an image or effect using a
nonlinear editing, compositing, or animation
program. The result is generally saved in a file on
the computer. Also called compile.
RGB video
A component video signal that uses
three signals to carry the separate Red, Green, and
Blue channels of colored images.
roll
1. Vertical movement of text across the
screen. Also called scroll. See also crawl.
2. Unwanted vertical roll of a video image,
indicating unstable sync.
RS-232
A non-differential serial data
transmission standard used for computer
connections.
RS-422
A differential serial data transmission
standard that is often used for linking video
production equipment (VTRs, mixers, etc.).
Because this standard is differential, RS-422
connections are less subject to interference and
noise than RS-232 connections.
S
saturation
A measure of the depth of a color.
Fully saturated colors are vivid, while colors that
lack saturation look washed out or faded.
scroll
See roll (1).
SDI
Serial Digital Interface. A communications
standard for broadcast digital equipment in which
data is transmitted and received one bit at a time
over a signal line.
SDTI
Serial Digital Transport Interface.
self-key
A key effect in which the key source
image is also the foreground image. Contrast with
filled key.
serial control
A method of remotely
controlling a device via a data line. The control
data is transmitted in serial form (that is, one bit
after another).
soft key
A key effect that has a fuzzy, soft edge
or semi-transparent areas. See also hard key.
software effect
An effect that must be
rendered by an editing program before it can be
played back. Compare with realtime effect.
soft wipe
A split screen or wipe effect with a
soft border or edge where the two images join.
spatial redundancy reduction
See intra-
frame compression.
striping a tape
Preparing a tape for editing by
recording continuous control track, time code, and
a video signal (such as black or color bars).
S-Video
See Y/C video.
sync
A circuit or signal that directs the electron
gun in a camera or TV picture tube to hold a
picture steady on the screen. It also synchronizes
the electronics of other video equipment.
sync generator
An electrical device that
generates sync (timing) signals used to