Voiced/unvoiced decision using a plurality of sigmoid-transforme

Details Voiced/unvoiced decision using a plurality of sigmoid-transforme Voiced/unvoiced decision using a plurality of sigmoid-transforme

1997-04-11

2000-02-08

Hudspeth, David R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704208, G10L 900

Patent

active

06023671&

ABSTRACT:
A method and apparatus for voiced/unvoiced decision for judging whether an input speech signal is voiced or unvoiced. The input parameters for performing the voiced/unvoiced (V/UV) decision are comprehensively judged in order to enable high-precision V/UV decision by a simplified algorithm. Parameters for the voiced/unvoiced (V/UV) decision include the frame-averaged energy of the input speech signal lev, the normalized autocorrelation peak value r0r, the spectral similarity degree pos, the number of zero crossings nZero, and the pitch lag pch. If these parameters are denoted by x, these parameters are converted by function calculation circuits using a sigmoid function g(x) represented by

REFERENCES:
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patent: 4797926 (1989-01-01), Bronson et al.
Bishnu S. Atal and Lawrence R. Rabiner, "A Pattern Recognition Approach to Voiced-Unvoiced-Silence Classification with Applications to Speech Recognition," IEEE Trans. Acoustics, Speech, and Signal Processing, vol. ASSP-24, No. 3, pp. 201-212, Jun. 1976.
Leah J. Siegel, "A Procedure for Using Pattern Classification Techniques to Obtain a Voiced/Unvoiced Classifier," IEEE Trans. Acoustics, Speech, and Signal Processing, vol. ASSP-27, No. 1, pp. 83-88, Feb. 1979.
Leah J. Siegel and Alan C. Bessey, "Voiced/Unvoiced/Mixed Excitation Classification of Speech," IEEE Trans. Acoustics, Speech, and Signal Processing, vol. ASSP-30, No. 3, pp. 451-460, Jun. 1982.

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