Chapter 8 : Other Information
8-4 Glossary
Chapter
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
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
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
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
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.
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8 Chapter 7 Chapter 6 Chapter 5 Chapter 4 Chapter 3 Chapter 2 Chapter 1