Data processing: speech signal processing – linguistics – language – Speech signal processing – For storage or transmission
Reexamination Certificate
2011-06-07
2011-06-07
McFadden, Susan (Department: 2626)
Data processing: speech signal processing, linguistics, language
Speech signal processing
For storage or transmission
Reexamination Certificate
active
07957964
ABSTRACT:
A noise suppression apparatus calculates a sound spectrum and a noise spectrum from an input sound, further calculates gain based on the sound spectrum and noise spectrum, and suppresses noise in the input sound. The noise suppression apparatus includes a first frame-dividing unit that divides the input sound into frames having a predetermined frame length, a second frame-dividing unit that divides the input sound into frames having a longer frame length than the frame length of the first frame-dividing unit, a second converting unit that converts, into a spectrum, the input sound divided into frames by the second frame-dividing unit, a smoothing unit that smoothes the converted spectrum in a frequency direction, and a gain calculating unit that calculates gain based on the smoothed spectrum and the noise spectrum.
REFERENCES:
patent: 7158932 (2007-01-01), Furuta
patent: 2002/0128830 (2002-09-01), Kanazawa et al.
patent: 2003/0076947 (2003-04-01), Furuta et al.
patent: 2004/0102967 (2004-05-01), Furuta et al.
patent: 1 100 077 (2001-05-01), None
patent: 8-022297 (1996-01-01), None
patent: 9-311698 (1997-12-01), None
patent: 2001-134287 (2001-05-01), None
patent: 2002-221988 (2002-08-01), None
patent: 2003-101445 (2003-04-01), None
patent: 2004-234023 (2004-08-01), None
S. 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.
N. Kitaoka et al., “Speech Recognition Under Noisy Environments Using Spectral Subtraction with Smoothing of Time Direction,” Journal of the Institute of Electronics, Information and Communications Engineers, D-II, vol. J83-D-11, No. 2, Feb. 2000, pp. 500-508 (partial translation).
Foley & Lardner LLP
McFadden Susan
Pioneer Corporation
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