54
G l o s s a r y
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 world-
wide 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 real audio presence.
Furthermore, various advanced functions such as the multi-
angle, multilingual, and Parental Control functions are pro-
vided with the DVD.
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.
Parental Control
A function of the DVD 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, play-
back is completely prohibited, violent scenes are skipped or
replaced with other scenes and so on.
Playback Control (PBC)
Signals encoded on Video CDs (Version 2.0) to control play-
back.
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.
Title
The longest sections of a picture or a music piece on a DVD;
a movie, etc., for a picture piece on video software; or an
album, etc., for a music piece on an audio software. Each title
is assigned a title number enabling you to locate the title you
want.
Track
Sections of a picture or a music piece on a CD or Video CD.
Each track is assigned a track number enabling you to locate
the track you want.
Video CD
A compact disc that contains moving pictures.
The picture data uses the MPEG 1 format, one of the world-
wide standards of digital compression technology.
The picture data is compressed to about 1/140 of its original
size. Consequently, a 12 cm Video Disc can contain up to 74
minutes of moving pictures.
Video CDs also contain compact audio data. Sounds 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 only moving pictures and sounds.
•
Version 2.0: You can play high-resolution still pictures and
enjoy PBC functions.
This system conforms to both versions.
