Noise suppression device

Details Noise suppression device Noise suppression device

2006-05-09

2006-05-09

Chin, Vivian (Department: 2644)

Electrical audio signal processing systems and devices

Noise or distortion suppression

C381S094200, C381S094300, C704S226000

Reexamination Certificate

active

07043030

ABSTRACT:
A noise suppressor device for attaining perceptually preferable noise suppression is disclosed. The device minimizes reduction in quality even in the presence of increased noises. The device is adaptable for use in voice communications systems and speech recognition systems employed in a variety of kinds of noisy environments. The device includes a spectrum subtracter and a spectrum amplitude suppressor that operate on the basis of perceptual weights.

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patent: 6044341 (2000-03-01), Takahashi
patent: 6591234 (2003-07-01), Chandran et al.
patent: 9-212196 (1997-08-01), None
Steven F. Boll, “Suppression of Acoustic Noise in Speech Using Spectral Subtraction,” IEEE Transactions on Acoustics, Speech, and Signal Processing, vol. ASSP-27, No. 2, Apr. 1979, pp. 113-120.
R. L. Bouquin, Speech Communication, vol. 18, No. 1, XP-004008920, pps. 3-19, “Enhancement of Noisy Speech Signals: Application to Mobile Radio Communications,” 1996.
B. L. Sim, et al., IEEE Transactions on Speech and Audio Processing, vol. 6, No. 4, XP-000785363, pps. 328-336, “A Parametric Formulation of the Generalized Spectral Subraction Method,” Jul. 1, 1998.

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