Speaker normalization using constrained spectra shifts in audito

Details Speaker normalization using constrained spectra shifts in audito Speaker normalization using constrained spectra shifts in audito

1993-09-17

1997-12-09

MacDonald, Allen R.

395 214, G10L 506

Patent

active

056968787

ABSTRACT:
A speaker normalization method is described based on spectral shifts in the auditory filter domain. The method is characterized by using an estimated vocal tract length as a criterion to determine the spectral shift value. Certain constraints are found to be necessary for the shift in the auditory filter domain, and two techniques based on these constraints, the One-Bark shift and the refined Bark-scale shift, are introduced. When tested in vowel classification experiments, significant performance improvement was obtained for both techniques. The method is useful for speaker normalization in speaker-independent speech recognition.

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patent: 4827516 (1989-05-01), Tsukahara et al.
patent: 4885790 (1989-12-01), McAulay et al.
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patent: 5165008 (1992-11-01), Hermansky et al.
patent: 5253326 (1993-10-01), Yong
Analysis and Generation of Voice Template Based on Shift Invariance of BArk Spectral Envelope Tseng et al./IEEE, Aug. 1990.
The effective Second Formant F2' and the Vocal Tract Front-Cavity Hermansky et al./IEEE, 1989.

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