Adaptive TRansform Acoustic Coding


Adaptive TRansform Acoustic Coding

(algorithm)(ATRAC) An audio compression algorithm,introduced by Sony for its Mini Disk, which relies on themasking of low-amplitude frequency components by temporalyadjacent high-amplitude components. ATRAC consists of athree-band subband encoder (0...5.5, 5.5...11, 11...22 kHz)and a MDCT based transformation encoder.