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Restoration of Nonlinearly Distorted Audio by Histogram Equalization

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A histogram-equalization method has been developed which can restore amplitude-distorted speech. A histogram of the input signal is modeled. The distribution function of the modeled input signal is compared to a reference distribution function. The mismatch can be used to describe the distorting nonlinearity and its inverse as an amplitude map which corrects the distorted signal.

JAES Volume 30 Issue 11 pp. 828-832; November 1982
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AES - Audio Engineering Society