Glossary
Analog audio
Direct representation of sound by an electrical signal. See also Digital audio.
Aspect ratio
The width of a TV screen relative to its height. Conven- tional TVs are 4:3; widescreen models are 16:9.
Bonus Group
An “extra” group on some
Browsable pictures
A feature of some
Digital audio
Indirect representation of sound using numbers. See also Sampling frequency and Analog audio.
Dolby Digital
A
DRM
DRM (Digital Rights Management) copy protection is a technology designed to prevent unauthorized copying by restricting playback, etc. of material on devices other the PC (or other WMA recording equipment) used to record it. For detailed information, please see the instruction manuals or help files that came with your PC (or other WMA recording equipment) and/or software.
DTS A
enables far more audio to be stored on a disc than PCM encoding. See also PCM (Pulse Code Modulation).
EXIF (Exchangeable Image File)
A file format developed by Fuji Photo Film for digital still cameras. Digital cameras from various manuafctur- ers use this compressed file format which carries date, time and thumbnail information, as well as the picture data.
File extension
A tag added to the end of a filename to indicate the type of file. For example, “.mp3” indicates an MP3 file.
ISO 9660 format
International standard for the volume and file structure of
JPEG
A standard file format used for still images. JPEG files are identified by the file extension “.jpg”.
MP3
MP3 (MPEG1 audio layer 3) is a compressed stereo audio file format.
Files are recognized by their file extension “.mp3”.
MPEG audio
An audio format used on Video CD/ Super VCDs and some DVD discs.
Packed PCM
A lossless compression system that enables more PCM audio to be stored on a
PBC (PlayBack Control)
A system of navigating a Video CD/ Super VCD through
PCM (Pulse Code Modulation)
Digital audio encoding system found on CDs. Good quality, but requires a lot of data compared to Dolby Dig- ital, DTS and MPEG encoded audio. See also Digital audio.
Progressive scan video
All the lines that make up a video picture are updated in one pass (compared to interlace which takes two passes to update the whole picture).
Regions
These associate
Sampling frequency
The rate at which sound is measured to be turned into digital audio data. The higher the rate, the better the sound quality. CD is 44.1 kHz; DVD can be up to 96 kHz. See also Digital audio.
Super Audio CD (SACD)
Super Audio CD is a high quality audio disc format that can accommodate high sampling rate stereo and multi- channel audio, as well as conventional CD audio all on the same disc.
WMA
WMA is short for Windows Media Audio and refers to an audio compression technology developed by Microsoft Corporation. Files are recognized by their file extension “.wma”. Microsoft, Windows Media, and the Windows logo are trademarks, or registered trademarks of Microsoft Corporation in the United States and/or other countries.
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