Noise reduction method and filter for implementing the method pa

Details Noise reduction method and filter for implementing the method pa Noise reduction method and filter for implementing the method pa

1994-09-20

1996-11-19

Tung, Kee M.

395 242, 395 22, G10L 302

Patent

active

055771610

ABSTRACT:
Noise reduction using a digital signal processor includes receiving an input signal which may include a noise-corrupted information signal and/or a noise signal, filtering the noise-corrupted information signal to reduce noise content, and outputting a filtered information signal having the noise content reduced. The filtering includes estimating the spectral envelope of the noise-corrupted information signal amplitude using the formula:

REFERENCES:
patent: 5012519 (1991-04-01), Adlersberg et al.
patent: 5097510 (1992-03-01), Graupe
patent: 5355431 (1994-10-01), Kane et al.
patent: 5432859 (1995-07-01), Yang et al.
"Frequency Domain Noise Suppression Approaches In Mobile Telephone Systems", Jin Yang, published in Proc. ICASSP, vol. 2, pp. 363-366, Apr. 1993.
"Speech Enhancement Using A Soft-Decision Noise Suppression Filter", Robert J. McAulay et al., IEEE Transactions on ASSP, vol. 28, No. 2, pp. 137-145, Apr. 1980.

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