Noise reduction method with self-controlling interference...

Details Noise reduction method with self-controlling interference... Noise reduction method with self-controlling interference...

2006-03-28

2006-03-28

Pendleton, Brian T. (Department: 2644)

Electrical audio signal processing systems and devices

Directive circuits for microphones

C381S094700, C381S094300

Reexamination Certificate

active

07020291

ABSTRACT:
The present invention relates to a method with which speech is captured in a noisy environment with as high a speech quality as possible. To this end, a compact array of, for example, two single microphones is combined to form one system through signal processing methods consisting of adaptive beam formation and spectral subtraction. Through the combination with a spectral subtraction, the reference signal of the beam former is freed from speech signal components to the extent that a reference signal of the interference is formed and the beam former produces high gains.

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Boll, S F, “Suppression of acoustic noise in speech using spectral subtraction”, IEEE Transactions on Acoustics, speech and signal processing, IEEE Inc, New York, USA, vol. 27, Nr. 2, Apr. 1979, ISSN 0096-3518.

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