Super bit mapping uses psychoacoustic principles and critical band analysis to maximize the sound quality of 16-bit digital audio. 20-bit recordings are quantized to 16 bits using an adaptive error-feedback filter. This filter shapes the quantization error into an optimal spectrum as determined by the short-term masking and equi-loudness characteristics of the input signal. Through this technique, the perceptual quality of 20-bit sound is available on a standard compact disc.

Authors: Akune, Makoto; Heddle, Robert; Akagiri, Kenzo
Affiliation: Sony Corporate Research Laboratories, Kitashinagawa, Shinagawa-ku, Tokyo, Japan
AES Convention: 93 (October 1992) Paper Number: 3371
Publication Date: October 1, 1992
Subject: Digital Signal Processing

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