Table of Contents
Advertisement
Film based software, Video based
software
DVD VIDEOs can be classified as Film
based or Video based software. Film
based DVD VIDEOs contain the same
images (24 frames per second) that are
shown at movie theaters. Video based
DVD VIDEOs, such as television dramas
or sitcoms, displays images at 30 frames
(or 60 fields) per second.
Interlace format (Interlaced
scanning)
The Interlace format is the NTSC
standard method for displaying TV
images at 30 frames per second. Each
frame is scanned twice-alternately
between the even numbered scanning
lines and then odd numbered scanning
lines, at 60 times per second.
Multi-angle function
Various angles, or viewpoints of the video
camera, for a scene are recorded on some
DVD VIDEOs.
Multilingual function
Several languages for the sound or
subtitles in a picture are recorded on some
DVD VIDEOs.
Parental Control
A function of the DVD VIDEO to limit
playback of the disc by the age of the
users according to the limitation level in
each country. The limitation varies from
disc to disc; when it is activated, playback
is completely prohibited, violent scenes
are skipped or replaced with other scenes
and so on.
GB
112
Playback Control (PBC)
Signals encoded on VIDEO CDs (Version
2.0) to control playback. By using menu
screens recorded on VIDEO CDs with
PBC functions, you can enjoy playing
simple interactive programs, programs
with search functions, and so on.
Progressive format (sequential
scanning)
In contrast to the Interlace format, the
progressive format can reproduce 50 – 60
frames per second by reproducing all
scanning lines (525 lines for the NTSC
system, 625 lines for PAL system). The
overall picture quality increases and still
images, text and horizontal lines appear
sharper. This format is compatible with
the 525 or 625 progressive format.
VIDEO CD
A compact disc that contains moving
pictures.
The picture data uses the MPEG 1 format,
one of the worldwide standards for digital
compression technology. The picture data
is compressed to about 1/140 of its
original size. Consequently, a 12 cm
VIDEO CD can contain up to 74 minutes
of moving pictures.
VIDEO CDs also contain compact audio
data.
Sound outside the range of human hearing
are compressed while the sounds we can
hear are not compressed. VIDEO CDs can
hold 6 times the audio information of
conventional AUDIO CDs.
There are 2 versions of VIDEO CDs.
• Version 1.1: You can play back only
moving pictures and sounds.
• Version 2.0: You can play back high-
resolution still pictures and enjoy PBC
functions.
This system conforms to both versions.
Advertisement
Table of Contents
