翻訳と辞書 |
adaptive transform acoustic coding : FOLDOC | Adaptive TRansform Acoustic Coding (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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