User Guide

72
Glossary
Bit rate
Value indicating the amount of video data
compressed in a DVD per second. The unit is Mbps
(mega bit per second). 1 Mbps indicates that the data
per second is 1,000,000 bits. The higher the bit rate is,
the larger the amount of data. However, this does not
always mean that you can get higher quality
pictures.
Chapter
Sections of a picture or a music piece on a DVD that
are smaller than titles. A title is composed of several
chapters. Each chapter is assigned a chapter
number enabling you to locate the chapter you want.
Dolby Digital
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 to realize 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.
Dolby Pro Logic Surround
As one method of decoding Dolby Surround, Dolby
Pro Logic Surround produces four channels from
two-channel sound. Compared with the former Dolby
Surround system, Dolby Pro Logic Surround
reproduces left-to-right panning more naturally and
localizes sounds more precisely. To take full
advantage of Dolby Pro Logic Surround, you should
have one pair of rear speakers and a center speaker.
The rear speakers output monaural sound.
DTS
Digital audio compression technology that the Digital
Theater Systems, Inc. developed. This technology
conforms to 5.1-channel surround. The rear channel
is stereo and there is discrete subwoofer channel in
this format. DTS provides the same 5.1 discrete
channels of high quality digital audio. The good
channel separation is realized because the all
channel data is recorded discretely and digitally
processed.
MPEG AUDIO
International standard coding system to compress
audio digital signals authorized by ISO/IEC. MPEG 1
conforms to up to 2-channel stereo. MPEG 2 used on
DVDs conforms to up to 7.1-channel surround.
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 real audio
presence.
Furthermore, various advanced functions such as the
multi-angle, multilingual, and Parental Control
functions are 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 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, 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 disc. 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.