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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