Matrox RT2000 Installation & User Manual page 281

Broadcast systems in North America and
Japan use the NTSC standard.
O
organic wipe A wipe effect that uses a
grayscale gradient pattern to switch from one
image to another by gradually revealing the
second image according to the pattern.
P
PAL Phase Alternate Line. A video standard
that uses a composite interlaced display
comprised of 625 scan lines per frame,
refreshed at a rate of 25 frames per second.
This is the broadcast video standard for most
of Europe.
particle effect A Matrox effect in which a
clip breaks apart or explodes in a number of
patterns.
PCI slot Connection slot to a type of
expansion bus found in most current
computers. It is smaller in size than older ISA
slots and provides connections to the high-
speed PCI host bus.
P-frame (Predicted frame) A frame
created during the MPEG or MPEG-2 IBP
compression process. A P-frame is created by
using motion vectors to predict the
differences between it and the closest
previous I-frame or P-frame. This forward
prediction allows for higher compression than
with I-frames, but not as high as with B-
frames. P-frames, like B-frames, contain only
predictive data and therefore cannot be edited
independently. See also I-frame (Inter-frame)
and B-frame (Bi-directional frame).
pixel Picture element. The smallest portion
of an image that can be written to a display.
Each pixel in an image represents a single dot
on the computer screen. A picture's resolution
depends on the number of pixels on the
screen.
Plug-and-Play A hardware standard for
auto-configuration. It refers to the ability of
computer hardware to detect and configure
expansion devices such as your Matrox
RT2000 card. Windows 98 and Windows Me
support Plug-and-Play.
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. 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 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
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RT2000 Glossary