Perceptual Effects of Dynamic Range Compression in Popular Music Recordings - January 2014
Accurate Calculation of Radiation and Diffraction from Loudspeaker Enclosures at Low Frequency - June 2013
New Measurement Techniques for Portable Listening Devices: Technical Report - October 2013
ATRAC: Adaptive Transform Acoustic Coding for MiniDisc
ATRAC is an audio coding system based on psychoacoustic principles. The input signal is divided into three sub-bands which are then transformed into the frequency domain using a variable block length. Transform coefficients are grouped into nonuniform bands to reflect the human auditory system, and then quantized on the basis of dynamic sensitivity and masking characteristics. ATRAC compresses Compact Disc audio to approximately one-fifth of the original data with virtually no loss in sound quality.
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