Additional information
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Appendix B: Glossary
Aspect ratio
A ratio which defines the shape of the rectangular picture in a TV. It is the width of the picture relative to the height. A conventional TV picture is 4:3 in aspect ratio.
Bitstream
The digital form of multichannel audio data (e.g., 5.1- channel) before it is decoded into its various channels.
Channel, CH
Stereo or multichannel audio consists of "channel" signals. "Stereo" audio consists of left and right channels, while
Chapter
The smallest division on DVD VIDEO. It is a division of a title and similar to a track for Audio CD or Video CD.
Component video
Video signals with three channels of separate information that makes up the picture. There are some types of component video, such as R/G/B and Y/CB(PR)/ CR(PR).
Composite video
A single video signal commonly used in most consumer video products that contains all luminance, color, and synchronization information.
Dolby Digital (AC3)
A
Not all Dolby Digital discs contain six (5.1) channels of information.
Dolby Surround/Dolby Pro Logic/Dolby Pro Logic II Dolby Surround is a
Dolby Pro Logic is a
Down - mix
Internal stereo mix of multichannel surround audio by a DVD player. The down - mix signals are output from stereo output connectors.
DTS
A Digital Surround audio encoding format configured with six (5.1) channels, similar to Dolby Digital. It requires a decoder, either in the player or in an external receiver. DTS stands for Digital Theater Systems.
Not all DTS discs contain six (5.1) channels of information.
Dynamic range
The difference between the loudest and softest sounds.
Dynamic range compression
The dynamic range compression (DRC) reduces the dynamic range so that you can turn down the volume to avoid disturbing others yet still hear the detail of quiet passages.
Extension
Several letters at the end of a file name. File name extensions usually follow a period and indicate the type of information stored in the file.
Finalize
When conducting multisession recording, this means the closing of a session (fixing) by indicating the halting of writing so as to prevent the addition of any more sessions.
Fs
See "Sampling frequency."
Group
The largest division on DVD AUDIO.
ID3 tag
A tag embedded in an MP3 file indicating what song, artist, and album it comes from. You can edit these tags.
Interlacced scanning
In a conventional video system, a picture is shown on the display monitor in between lines of two halves. The Interlacced scanning system places lines of the second half of the picture
ISO 9660 Format
The most common international standard for the logical format of files and directories on a
JPEG
A popular file format for still image compression and storage.
JPEG stands for Joint Photographic Experts Group. There are three
follows. |
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• | baseline JPEG: | used for digital cameras, the |
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| web, etc. |
• | progressive JPEG: used for the web | |
• | lossless JPEG: | an old type, rarely used now |
Letter box
A type of video display for normal (4:3) TV screens. Black bars are shown at the top and bottom of the image to allow playing of a
Linear PCM audio
PCM stands for "pulse code modulation." Linear PCM is the usual method for digitally encoding audio without compression, and is used for the audio tracks on DVD VIDEO discs, Audio CDs, etc.
Menu
Most DVD AUDIO, DVD VIDEO or SVCD/Video CD discs provide a menu, through which users can select desired material, conditions, etc.
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