Roxio DVDit Pro HD, User Manual

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Glossary
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pixel
aspect ratio
The ratio between a single pixel’s width and its height. This is usually expressed as a
decimal number.
Pixels on a computer monitor are square and have a pixel aspect ratio of 1. Pixels on a
TV screen are rectangular: on a standard NTSC TV, each pixel is slightly taller than it
is wide, with a pixel aspect ratio of 0.9; on a standard PAL TV, each pixel is slightly
wider than it is tall, with a pixel aspect ratio of 1.0666. This is why standard NTSC
and PAL TVs have the same 4:3 aspect ratio even though they use a different number
of scan lines.
For widescreen (16:9) TVs, the pixel aspect ratios are 1.2 for NTSC and 1.4222 for
PAL.
playlist
In DVDit Pro HD, a sequence of titles that play in succession. On a DVD+VR disc, an
edited selection of sections from one or more
title s.
PNG
Portable network graphic. A versatile lossless compressed bitmap graphics format
that supports transparency. Files have the extension . png .
program
stream
A stream containing multiplexed video and audio. Compare with elementary stream .
progressive
scanning
A method for displaying a video signal on a computer monitor (and on high-definition
TV). In a progressive scanning system, the scan lines are all displayed at the same
time. To prevent flicker, the scanning frequency must be twice that of a standard TV,
but this produces a higher quality picture. Compare with
interlaced scanning .
project file
The file that tells DVDit Pro HD where all the video, audio, and graphics in a DVD
project are located, and how to assemble and process them to create a disc. This file
has the extension
.dvd-dvi .
QuickTime
A software standard for creating, organizing, and playing video and audio developed
by Apple Computer, Inc.
Region
Code
Hollywood movie studios release movies at different times in different regions of the
world. To prevent the DVD version of a movie from becoming available before it
appears in theaters in a particular region, the DVDs have one or more embedded
Region Codes. Every DVD player is supposed to read these codes and only play a disc
if one of its codes matches a code embedded in the player.
resampling
The process of converting a digital image from one resolution (size) to another.
resolution
The size (width x height) of a digital image, measured in pixels.
DVDit_Pro_HD.book Page 208 Monday, September 25, 2006 2:32 PM