GLOSSARY
Bit Rate
Value indicating the amount of video data compressed in a DVD per second. The unit is Mbps (megabits 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 the 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 chan- nel separation. Furthermore, since all the signals are processed digitally, less signal degradation occurs. The name
Manufactured under license from Dolby Laboratories. “Dolby,”
Dolby Pro Logic II Surround
This is a method of decoding stereo or surround recordings that produces five channels from
DTS
Digital audio compression technology developed by DTS, Inc.
This technology conforms to
Good channel separation is realized, because all channels are recorded discretely and processed digitally.
Manufactured under license from DTS, Inc. U.S. Patent
No. 5,451,942 and other worldwide patents issued and pending. “DTS” and “DTS Digital Surround” are trademarks of DTS, Inc. © 1996 DTS, 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
DVD
A disc that contains up to eight hours of moving pictures even though its diameter is the same as a CD. The data capacity of a
The DVD also uses the variable rate coding technology that changes the data to be allocated according to the status of the pic- ture. 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
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 U.S.) DVDs 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.
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