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C-707I
Term Meaning Page
CD-DA Refers to music CDs. Almost all discs normally referred to as
“CDs” are actually CD-DA discs.
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MP3 An audio compression method developed by Germany's
Fraunhofer IIS, which achieves high rates of data compression
by discarding data not readily audible to humans. MP3 can
compress data down to rates of approximately 1/11 (128
kbps) while retaining sound quality equivalent to a music CD.
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USB hub An adapter that provides simultaneous connection of
multiple USB devices.
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USB mass storage
class
A standard for computer control of a USB device. It also makes
it possible for a computer to recognize a connected USB
device as an external storage device.
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VBR
(Variable Bitrate)
A system that varies the amount of data per time segment in
accordance with the music data volume.
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WMA An abbreviation for the “Windows Media™ Audio” audio
compression and encoding system developed by Microsoft
Corporation of the U.S.
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Sampling frequency A value that indicates the number of times per second analog
signals are sampled for conversion to digital signals. The
sampling frequency for music CDs is 44.1 kHz. Normally, the
higher the sampling frequency, the better the sound quality.
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Bitrate A value indicating the amount of information processed per
second. The higher the bitrate, the better the sound quality.
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Glossary
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