Roxio DVDit Pro HD, User Manual

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Glossary
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fps
Frames per second. The measurement of the rate at which video or film images are
displayed to produce the illusion of movement.
frame
A single complete image in video or film.
frame rate
The rate at which video or film images are displayed, measured in frames per second
(fps). Film has a frame rate of 24 fps, the NTSC video frame rate is 29.97 fps, and the
PAL video frame rate is 25 fps.
frame size
The size of the video frame, measured in pixels. Also known as resolution.
G
Standard abbreviation for giga (billion). When used in units of measurement such as
bits or Hertz, it means one (American) billion (1,000,000,000 or 10
9
). When used for
measuring bytes of computer data, it means 1,073,741,824 or 2
30
.
GB
Gigabyte. In a computer, this is 2
30
(1,073,741,824) byte s. In a DVD disc, this is 10
9
(1,000,000,000) bytes.
General
media
A recordable DVD that is designed for use in consumer DVD recorders. You cannot
record DVD data that has been encrypted with the Content Scrambling System (CSS)
onto General discs (almost all Hollywood DVDs are CSS-encrypted). Compare with
Authoring media .
GHz
Gigahertz. 1,000,000,000 cycles per second. A unit of measurement for frequencies.
GIF
Graphics interchange format. A lossless compressed bitmap graphics file format
popular for Web images. GIF images can contain up to 256 colors, support
transparency, and can be animated. However, DVDit Pro HD does not support GIF
animations. Files have the extension .
gif .
GOP
Group of Pictures. A unit of MPEG video, the GOP is a block of video frames of
different types. Every GOP begins with an
I-picture , followed by a repeating pattern
of P-picture s and B-picture s.
For example:
I B B P B B P B B P B B P B B P I B B P...
^ ^
Start of GOP Start of next GOP
In MPEG-2 video, the I-, B-, and P-pictures can contain either frames or fields. In
MPEG-1 video, they contain only frames.
DVDit_Pro_HD.book Page 204 Monday, September 25, 2006 2:32 PM