Patent
1993-02-22
1995-12-05
MacDonald, Allen R.
395 267, 395 226, 395 272, G10L 510
Patent
active
054737591
ABSTRACT:
A system for reconstructing a signal waveform from a correlogram is based upon the recognition that the information in each channel of the correlogram is equivalent to the magnitude of the Fourier transform of a signal. By estimating a signal on the basis of its Short-Time Fourier Transform Magnitude, each channel of information from a cochlear model can be reconstructed. Once this information is retrieved, a signal waveform can be resynthesized through inversion of the cochlear model. The process for reconstructing the cochlear model data can be optimized with the use of techniques for improving the initial estimate of the signal from the magnitude of its Fourier Transform, and by employing information that is known apriori about the signal during the estimation process, such as the characteristics of sound signals.
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Lyon Richard F.
Naar Daniel
Slaney Malcolm
Apple Computer Inc.
Dorvic Richemond
MacDonald Allen R.
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