User Guide

Glossary 319
FOURCC (Four-Character Code) Method developed by Microsoft Corporation to allow
software and hardware to identify the format of a video data stream. Examples of FOURCC
codes include YUYV and I420.
fps (Frames per Second) Rate at which video or film images are displayed to produce the
illusion of movement.
frame Single complete image in video or film. In interlaced video, a frame consists of two
fields.
frame rate 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) bytes. In a DVD disc, this is 10
9
(1,000,000,000) bytes.
General Media 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. Unit of measurement for frequencies.
GOP (Group of Pictures) 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-
pictures and B-pictures, such as this:
I B B P B B P B B P B B P B B P I B B P...
Start of next GOPStart of GOP