Noise suppression

Details Noise suppression Noise suppression

2007-10-16

2007-10-16

Hudspeth, David (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

C704S233000, C704S224000, C704S225000, C704S226000, C704S227000

Reexamination Certificate

active

10245963

ABSTRACT:
A method and apparatus for noise suppression is described herein. The channel gain is controlled based on a degree of variability of the background noise. The noise variability estimate is used in conjunction with a variable attenuation concept to produce a family of gain curves that are adaptively suited for a variety of combinations of long-term peak SNR and noise variability. More specifically, a measure of the variability of the background noise is used to provide an optimized threshold that reduces the occurrence of non-stationary background noise entering into the transition region of the gain curve.

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Ramabadran, T.; Ashley, J.; McLaughlin, M.; “Background Noise Suppression for Speech Enhancement And Coding”, Jun. 1997 EEE. Workshop on Speech Coding.

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