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DVD
A disc that contains up to 8 hours of moving
pictures even though its diameter is the same as
a CD.
The data capacity of a single-layer and single-
sided DVD, at 4.7 GB (Giga Byte), is 7 times
that of a CD. Furthermore, the data capacity of a
dual-layer and single-sided DVD is 8.5 GB, a
single-layer and double-sided DVD 9.4 GB, and
a dual-layer and double-sided DVD 17 GB.
The picture data uses the MPEG 2 format, one of
the worldwide standards of digital compression
technology. The picture data is compressed to
about 1/40 of its original size. The DVD also
uses the variable rate coding technology that
changes the data to be allocated according to the
status of the picture.
The audio data is recorded in Dolby Digital as
well as in PCM, allowing you to enjoy more
realistic audio presence.
Furthermore, various advanced functions such
as the multi-angle, multilingual, and Parental
Control functions are provided with the DVD.
DVD-RW
A DVD-RW is a recordable and rewritable disc
that is the same size as a DVD VIDEO. The
DVD-RW has two different modes: VR mode
and Video mode. DVD-RWs created in Video
mode have the same format as a DVD VIDEO,
while discs created in VR (Video Recording)
mode allow the contents to be programmed or
edited.
DVD+RW
A DVD+RW (plus RW) is a recordable and
rewritable disc. DVD+RWs use a recording
format that is comparable to the DVD VIDEO
format.
File
Sections of a picture or a music piece on a
DATA CD (MP3/JPEG/DivX file) or DATA
DVD (DivX file).
Film based software, Video based
software
DVDs can be classified as Film based or Video
based software. Film based DVDs contain the
same images (24 frames per second) that are
shown at movie theaters. Video based DVDs,
such as television dramas or sit-coms, displays
images at 30 frames (or 60 fields) per second.
Index (CD) / Video Index (VIDEO CD)
A number that divides a track into sections to
easily locate the point you want on a VIDEO CD
or a CD. Depending on the disc, no indexes may
be recorded.
Interlace format
(Interlaced scanning)
Interlace format shows every other line of an
image as a single “field” and is the standard
method for displaying images on television. The
even number field shows the even numbered
lines of an image, and the odd numbered field
shows the odd numbered lines of an image.
Menu Playback
Playback using the menu screens recorded on
VIDEO CDs with PBC functions. You can enjoy
simple interactive software using the menu
playback function.
Multi-angle function
Various angles, or viewpoints of the video
camera, for a scene are recorded on some DVDs.
Multilingual function
Several languages for the sound or subtitles in a
picture are recorded on some DVDs.
Multi Session
This is a recording method that enables adding
of data using the Track-At-Once method.
Conventional CDs begin at a CD control area
called the Lead-in and end at an area called
Lead-out. A Multi Session CD is a CD having
multiple sessions, with each segment from
Lead-in to Lead-out regarded as a single session.
CD-Extra: This format records audio (audio CD
data) on the tracks in session 1 and data on the
tracks in session 2.