Linear prediction based noise suppression

Details Linear prediction based noise suppression Linear prediction based noise suppression

2006-06-20

2006-06-20

McFadden, Susan (Department: 2655)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

C704S226000, C704S219000, C704S215000

Reexamination Certificate

active

07065486

ABSTRACT:
Various time-domain noise suppression methods and devices for suppressing a noise signal in a speech signal are provided. For example, a time-domain noise suppression method comprises estimating a plurality of linear prediction coefficients for the speech signal, generating a prediction error estimate based on the plurality of prediction coeficients, generating an estimate of the speech signal based on the plurality of linear prediction coefficients, using a voice activity detector to determine voice activity in the speech signal, updating a plurality of noise parameters based on the prediction error and if the voice activity detector determines no voice activity in the speech signal, generating an estimate of the noise signal based on the plurality of noise parameters, and passing the speech signal through a filter derived from the estimate of the noise signal and the estimate of the speech signal to generate a clean speech signal estimate.

REFERENCES:
patent: 5781883 (1998-07-01), Wynn
patent: 6070137 (2000-05-01), Bloebaum et al.
patent: 6104994 (2000-08-01), Su et al.
patent: 6694293 (2004-02-01), Benyassine et al.
patent: 2001/0005822 (2001-06-01), Fujii et al.
Hansen, John. Clements, Mark. “Constrained Iterative Speech Enhancement with Application to Speech Recognition”, IEEE Transactions of Signal Processing, vol. 39, No. 4, Apr. 1991.

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