Acoustic noise suppressor

Details Acoustic noise suppressor Acoustic noise suppressor

1996-11-14

1998-05-26

Isen, Forester W.

Electrical audio signal processing systems and devices

Noise or distortion suppression

Spectral adjustment

704233, H04B 1500

Patent

active

057579377

ABSTRACT:
In an acoustic noise suppressor, a power spectrum component and a phase component are extracted from an input signal by a frequency analysis part, while at the same time a check is made in a speech
on-speech identification part to see if the input signal is a speech signal or noise. Only when the input signal is noise, its spectrum is stored in a storage part and is weighted by a psychoacoustic weighting function W(f), and the weighted spectrum is subtracted from the power spectrum of the input signal and is reconverted to a time-domain signal by making its inverse analysis.

REFERENCES:
patent: 5377277 (1994-12-01), Bisping
patent: 5479517 (1995-12-01), Linhard
patent: 5550924 (1996-08-01), Helf et al.

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