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ENGLISH
GLOSSARY
Bit rate
Value indicating the amount of video
data compressed in a DVD per
second. The unit is Mbps (megabit per
second). 1 Mbps indicates that the
data per second is 1,000,000 bits. The
higher the bit rate, the larger the
amount of data. However, this does
not always mean higher quality
pictures.
Chapter
Sections of a picture or a music piece
on a DVD that are smaller than titles.
Many titles are composed of several
chapters, but many others are not.
Each chapter is assigned a chapter
number enabling you to locate the
chapter you want.
Dolby Digital (“5.1”, “AC-3”)
This sound format for movie theaters
is more advanced than Dolby Pro
Logic Surround. In this format, the rear
speakers output stereo sound with an
expanded frequency range and a
subwoofer channel for deep bass is
independently provided. This format is
also called “5.1” because the
subwoofer channel is counted as 0.1
channel (since it functions only when
a deep bass effect is needed). All six
channels in this format are recorded
separately for superior channel
separation. Furthermore, since all the
signals are processed digitally, less
signal degradation occurs. The name
“AC-3” comes from the fact that it is
the third audio coding method to be
developed by the Dolby Laboratories
Licensing Corporation.
Manufactured under license from
Dolby Laboratories. "Dolby", "AC-3",
"Pro Logic" and the Double-D symbol
are trademarks of Dolby Laboratories.
Confidential Unpublished Works.
© 1992.1997 Dolby Laboratories, Inc.
All rights reserved.
Dolby Pro Logic II Surround
This is a method of decoding surround
recordings that produces five
channels from two-channel sound.
Compared with the former Dolby
Surround system, Dolby Pro Logic II
Surround reproduces left-to-right
panning more naturally and localizes
sounds more precisely. To take full
advantage of Dolby Pro Logic II
Surround, you should have a pair of
rear speakers and a center speaker.
The rear speakers output stereo
sound.
DTS
Digital audio compression technology
developed by Digital Theater Systems,
Inc. This technology conforms to 5.1-
channel surround. The rear channels
are stereo and there is a discrete
subwoofer channel in this format. DTS
provides 5.1 discrete channels of high
quality digital audio. Good channel
separation is realized, because all
channels are recorded discretely and
processed digitally.
Manufactured under license from
Digital Theater Systems, Inc. US Pat.
No. 5,451,942 and other worldwide
patents issued and pending. "DTS" and
"DTS Digital Surround" are trademarks
of Digital Theater Systems, Inc.
© 1996 Digital Theater Systems, Inc.
All rights reserved.
MPEG AUDIO
International standard coding system
to compress audio digital signals
authorized by ISO/IEC. MPEG 1
conforms to up to 2-channel stereo,
used on some DVD’s as alternate
(other language) track.
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, DTS and/or PCM, allowing you
to enjoy more natural audio presence.
Furthermore, various advanced
functions such as multi-angle,
multilingual, and subtitles may be
provided 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 some (particulary US)
DVD’s to limit playback of the disc by
the age of the users. 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.
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 music piece on a CD.
Each track is assigned a track number
enabling you to locate the track you
want.
PCM
Pulse code modulation, an
uncompressed data formation.
NTSC
National TV Systems Committee: a
video standard used in USA.
PAL
Phase Alternation Line: a video
standard used in many European
countries.