Adaptive transform acoustic coding
adaptive transform acoustic coding
algorithm
(atrac) an audio compression algorithm, introduced by sony for its mini disk, which relies on the masking of low-amplitude frequency components by temporaly adjacent high-amplitude components. atrac consists of a three-band subband encoder (0…5.5, 5.5…11, 11…22 khz) and a mdct based transformation encoder.
[does sony minidisk use adpcm?]
(2001-12-13)
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