Automatic speech recognition method and apparatus, using...

Details Automatic speech recognition method and apparatus, using... Automatic speech recognition method and apparatus, using...

2011-01-25

2011-01-25

Albertalli, Brian L (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

C704S231000

Reexamination Certificate

active

07877252

ABSTRACT:
An automatic speech recognition method includes converting an acoustic signal into a digital signal; determine a power spectrum of at least one portion of the digital signal; and non-linearly determining envelope values of the power spectrum at a plurality of respective frequencies, based on a combination of the power spectrum with a filter function. Non-linearly determining envelope values involves calculating each envelope value based on a respective number of values of the power spectrum and of the filter function and the respective number of values is correlated to the respective frequency of the envelope value.

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Zhu, Q. et al., “Non-linear feature extraction for robust speech recognition in stationary and non-stationary noise,” Computer Speech and Language, vol. 17, 2003, pp. 381-402.

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