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Chapter 8 : Other Information
Chapter 1
Chapter 2
Chapter 3
Chapter 4
Chapter 5
Chapter 6
Chapter 7
Chapter 8
8-4 Glossary
DVD (Digital Versatile Disc) : DVD VIDEO is a disc
featuring high video/audio quality, made possible by
large recording capacity of video and audio signals of
movie software, etc. and by digital signal processing. DVD
AUDIO has been desired to provide even higher audio
quality than DVD VIDEO by using high-bit, high
sampling rate processing.
VIDEO CD (VCD) : This is a CD containing moving
picture. By compressing video data to about 1/120 and
audio data to about 1/6, a 12 cm disc with the same size
as ordinary music CD can store moving pictures and
audio for up to about 74 minutes.
The VCD includes the P.B.C.-incompatible discs with only
the playback capability (Version 1.1) and P.B.C.-
compatible discs with the menu playback and special
playback capabilities (Version 2.0)
MPEG (Moving Picture Expert Group) (DVD, VCD) :
A digital video and audio compression and
decompression system which is standardized as an
international standard.
Decoder : A device for restoring standard audio signal
from audio data recorded based on coding into DVD
data, etc. This processing is referred to as decoding.
Downmixing : Conversion of multichannel audio
signals of DVD or DTS-CD into 2-channel stereo signals.
Sampling rate : Sampling refers to converting an analog
signal into digital signal by slicing the analog signal into
fine parts at a certain time interval and digitizing every
sliced part. The sampling rate is the count of slicing per
second. The original sound can be reproduced more
faithfully when the sampling rate is higher.
Quantization bit : The quantization bit count refers to
the number used in digitizing the sliced parts obtained
by slicing the analog signal as described above. The
quantization bit count is the number of bits used in
digitization per second. The original sound can be
reproduced more faithfully when the quantization bit
count is larger.
Linear PCM (Pulse Code Modulation): Audio signal
format without using compression. In the DVD which
has a very large disc capacity, the linear PCM signal using
high sampling rate can be recorded.
Packed PCM : The packed PCM (P.PCM) signal is
obtained by compressing the linear PCM signal featuring
large data amount and high sampling rate. With this
compression, the signal before compression can be
restored perfectly.
Bitstream (DVD) : This is the generic name given for
the flow of data based on a standard such as Dolby
Digital, DTS, MPEG, etc.
Dolby Digital : A digital audio compression technology
developed by Dolby Laboratories, Inc. It is compatible
with 5.1-channel surround audio as well as 2-channel
stereo, and capable of recording a large amount of audio
data efficiently in a disc.
DTS : Digital surround system developed by Digital
Theater Systems, Inc.
Title/Title No. (DVD VIDEO) : The title is the largest
unit of video or audio recorded in DVD VIDEO. Usually,
a title corresponding to a movie product with video
software or an album (or a piece of music) with music
software. The numbers assigned to the titles are referred
to as title numbers.
Chapter/Chapter No. (DVD VIDEO) : The chapter is a
partition of video or audio that is smaller than the title.
A title is composed of multiple chapters. The numbers
assigned to the chapters are referred to as chapter
numbers.
Group/Group No. (DVD AUDIO) : The group is the
largest unit of the contents in DVD AUDIO. Usually, a
group corresponds to an album. The numbers assigned
to the groups are referred to as group numbers.
Track/Track No. (DVD AUDIO, VCD, CD) : The track
is a partition of audio (such as a piece of music or music
chapter) in a disc. These partitions are numbered and
the numbers are referred to as track numbers. While a
track usually corresponds to a piece of music with DVD
AUDIO or ordinary music CD, the partitions of contents
and track numbers are not always corresponding with
VCD. As a result, while all of the playback operations
including track skipping and programming of ordinary
music CD are based on the track number information,
such operations may sometimes be unavailable with
VCD.
AVTT (Audio Video Title): Part of DVD AUDIO that
contains moving pictures. The audio language, subtitle
language and viewing angles in this part can be switched
by the user.
AOTT (Audio Only Title): Part of DVD AUDIO that
contains audio and still pictures. The audio language and
still pictures in this part can be switched by the user.
Subtitle language (DVD): Some DVDs contain the
recording of multiple subtitle languages. This player
allows the user to select desired one of the recorded
subtitle languages during playback of such a DVD.
Angle (DVD): Some DVDs contain the recording of
multiple viewing angles. This player allows the user to
select desired one of the recorded angles during playback
of such a DVD.