Lombard effect compensation using a frequency shift

Details Lombard effect compensation using a frequency shift Lombard effect compensation using a frequency shift

1992-11-30

1994-11-01

Knepper, David D.

395 218, 395 243, G10L 302, G10L 904

Patent

active

053613244

ABSTRACT:
An analyzer performs spectral analysis of a characteristic parameter of an input speech signal per unit time so as to calculate, as a recognition parameter, orthogonal expansion of a spectrum of the analyzed characteristic parameter. A formant frequency of the input speech signal is detected, and a compensation value is calculated for the recognition parameter using the formant frequency. The recognition parameter is compensated in accordance with variations of the input speech signal caused by a noisy environment using the compensation value. The compensated recognition parameter is compared with reference parameters to output a recognition result.

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ICASSP'87 (1987 International Conference on Acoustics, Speech and Signal Processing, Dallas, Apr. 6th-9th 1987), vol. 2, pp. 717-720, IEEE New York, U.S.; Y. Chen "Cepstral domain stress compensation for robust speech recognition"; pp. 718, 719: Cepstral domain stress compensation-A hypothesis driven approach.

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