Matrox Electronic Systems Matrox RT.X2 - Manual (Page 208)

200
Appendix D, Matrox RT.X2 Glossary
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.
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
hardware. Windows supports Plug and Play.
plug-in Software that adds functionality
and/or features to an application. For
example, the Matrox realtime plug-in for
Adobe Premiere Pro adds realtime Matrox
effects and transitions to Adobe Premiere Pro.
proc amp An electronic device that adjusts
the different aspects of a video signal, such as
its hue, saturation, and contrast.
progressive scanning A method of
creating a video image by drawing all the
lines of a screen sequentially so that the
complete image is displayed in one pass.
VGA displays and some HDTV formats use
progressive scanning. Progressive scanning
produces smoother pictures than interlaced
scanning, but uses more bandwidth.
pulldown detection A method of
identifying the extra video frames that are
added when 24 fps film footage or 23.98 fps
progressive video is converted to 29.97 fps
interlaced video. See also 2:3 pulldown and
advanced 2:3:3:2 pulldown.
R
realtime effect An effect that is played
back instantly, without having to be rendered
by an editing program.
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 parade A specialized scope that
displays the red, green, and blue components
of a video signal.
RGB video A component video signal that
uses three signals to carry the separate Red,
Green, and Blue channels of colored images.
ripple effect A Matrox effect that lets you
create 3D ripple patterns that simulate a flag
waving, ripples in a pond, or a dream
sequence.
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. See also serial control.
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. See also serial control.
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).
SD Short for SDTV.