Noise suppression apparatus

Details Noise suppression apparatus Noise suppression apparatus

2007-01-02

2007-01-02

Mei, Xu (Department: 2615)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

C381S094200, C381S094300

Reexamination Certificate

active

09599367

ABSTRACT:
In the noise suppression apparatus, a spectrum correction gain calculation unit calculates the noise amplitude spectrum correction gain and the noise removal spectrum correction gain using the input amplitude spectrum, noise amplitude spectrum and respective coefficients; a spectrum deduction unit deducts the product of the noise amplitude spectrum and the noise amplitude spectrum correction gain from the input amplitude spectrum and outputs the result as a first noise removal spectrum; a spectrum suppression unit multiplies the first noise removal spectrum by the noise removal spectrum correction gain and outputs the result as a second noise removal spectrum; finally a frequency/time conversion unit converts the second noise removal spectrum into a time domain signal.

REFERENCES:
patent: 4811404 (1989-03-01), Vilmur et al.
patent: 5668927 (1997-09-01), Chan et al.
patent: 5687285 (1997-11-01), Katayanagi et al.
patent: 5742927 (1998-04-01), Crozier et al.
patent: 5757937 (1998-05-01), Itoh et al.
patent: 5812970 (1998-09-01), Chan et al.
patent: 6032114 (2000-02-01), Chan
patent: 6477489 (2002-11-01), Lockwood et al.
patent: 6671667 (2003-12-01), Chandran et al.
patent: 7043030 (2006-05-01), Furuta
patent: 0 683 482 (1995-11-01), None
patent: 2 768 547 (1999-03-01), None
patent: 8-506427 (1996-07-01), None
patent: 8-221093 (1996-08-01), None
patent: 9-212196 (1997-08-01), None
patent: 11-162240 (1999-06-01), None
patent: WO 94/18666 (1994-08-01), None
B. L. Sim, et al., IEEE Transactions on Speech and Audio Processing, vol. 6, No. 4, pp. 328-336, XP-000785363, “A Parametric Formulation of the Generalized Spectral Subtraction Method”, Jul. 1, 1999.
L. Arslan, et al., Acoustics, Speech, and Signal Processing, pp. 812-815, XP-010151342, “New Methods for Adaptive Noise Suppression”, May 9, 1995.
R. Le Bouquin, Speech Communication, Elsevier Science Publishers, vol. 18, No. 1, pp. 3-19, XP-004008920, “Enhancement of Noisy Speech Signals: Application to Mobile Radio Communications”, 1996.
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.

Affiliated with

Also associated with

Rating

Noise suppression apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Noise suppression apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Noise suppression apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3755501