Roxio DVDit Pro HD, Руководство пользователя

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Glossary
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DivX
A codec for creating extremely compressed video files.
Dolby
Digital
A high-quality compressed audio format developed by Dolby Laboratories, Inc.
Dolby compression can deliver up to six channels of surround sound.
drop-
frame/non-
drop-frame
timecode
NTSC-format video contains either drop-frame or non-drop-frame timecode.
The NTSC frame rate is 29.97 fps. Timecode counters cannot count anything less than
a whole frame, so NTSC timecode counters increment the second count after every 30
frames. This means that each second on the timecode counter is slightly longer than a
real second (0.03 frames, or about one-thousandth of a second longer). This does not
sound like much, but over time, the timecode counter will gradually become more
inaccurate — after 100 minutes, the timecode will be off by six seconds. This is the
effect of non-drop-frame timecode.
Drop-frame timecode keeps the timecode count accurate. In drop-frame video, frames
0 and 1 are omitted (dropped) from the timecode count at the start of every minute
except 0, 10, 20, 30, 40, and 50 minutes, so that for example, the timecode count
jumps from 00:00:59:29 to 00:01:00:02 instead of to 00:01:00:00. (The actual frames
are not dropped, just the numbers.)
Since the PAL frame rate is a whole number of frames (25 fps), PAL timecode
counters are always accurate.
DV
Digital Video (note the capitalization). A high-quality compressed component digital
videotape format developed by a consortium of companies.
DVCAM,
DVCPRO
Professional devices that use the DV format for encoding video signals.
DVD
DVD stands for Digital Video Disc, or Digital Versatile Disc, or nothing, depending
on who you ask. An optical disc storage technology developed by a consortium of
companies called the DVD Forum, the DVD format includes standards for storing
video, audio, and general data.
DVD
Volume
A disk or folder containing all the data that should go on a DVD disc. The DVD
Volume contains a
VIDEO_TS folder, as well as other data files and folders that will
go on the disc. The DVD Volume can be tested by playing it with a software DVD
player before it is burned onto a disc.
DVD+R
DVD-Video “plus” Recordable. A DVD disc that can be recorded once.
DVD+RW
DVD-Video “plus” Rewritable. A DVD disc that can be recorded and erased about
1,000 times. DVD+RW discs let users overwrite parts of the existing data without
making the remaining data unusable, similar to the way that videotape works.
DVDit_Pro_HD.book Page 202 Monday, September 25, 2006 2:32 PM