Matrox Electronic Systems Matrox RT.X2 User Manual download pdf (Page 208)

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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.

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