33
English
Term
Meaning
Page
AAC
An abbreviation for “Advanced Audio Coding”. This is
a compression standard that applies only to the audio
component in image compression methods used for digital
broadcasting, etc.
10
Bit rate
A number indicating the amount of information processed
per second. The higher the bit rate, the better the sound
quality.
10
CD-DA
Refers to music CDs. Almost all discs normally referred to as
“CDs” are actually CD-DA discs.
9
CD-TEXT
A generic name for music CDs that contain text information
such as the disc name, artist names and track names.
21
MP3
An audio compression method developed by Germany’s
Fraunhofer IIS that achieves high rates of data compression
by discarding data that is not readily audible by humans. MP3
can compress data down to rates of approximately 1/11 (128
kbps) while retaining sound quality equivalent to a music CD.
10
Sampling
frequency
A number that indicates the number of times per second that
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.
10
WMA
An abbreviation for the “Windows Media™ Audio” audio
compression and encoding system developed by Microsoft
Corporation of the U.S.
10
Glossary of Terms
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