Noise suppression circuit for a wireless device

Details Noise suppression circuit for a wireless device Noise suppression circuit for a wireless device

2007-02-06

2007-02-06

Chawan, Vijay (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

C704S220000, C704S500000, C381S094300

Reexamination Certificate

active

10620551

ABSTRACT:
An adaptive noise suppression system includes an input A/D converter, an analyzer, a filter, and a output D/A converter. The analyzer includes both feed-forward and feedback signal paths that allow it to compute a filtering coefficient, which is input to the filter. In these paths, feed-forward signal are processed by a signal to noise ratio estimator, a normalized coherence estimator, and a coherence mask. Also, feedback signals are processed by a auditory mask estimator. These two signal paths are coupled together via a noise suppression filter estimator. A method according to the present invention includes active signal processing to preserve speech-like signals and suppress incoherent noise signals. After a signal is processed in the feed-forward and feedback paths, the noise suppression filter estimator then outputs a filtering coefficient signal to the filter for filtering the noise out of the speech and noise digital signal.

REFERENCES:
patent: 4628529 (1986-12-01), Borth et al.
patent: 4630305 (1986-12-01), Borth et al.
patent: 5012519 (1991-04-01), Adlersberg et al.
patent: 5550924 (1996-08-01), Helf et al.
patent: 5563944 (1996-10-01), Hasegawa
patent: 5903819 (1999-05-01), Romesburg
patent: 5920834 (1999-07-01), Sih et al.
patent: 5982317 (1999-11-01), Steensgaard-Madsen
patent: 6088668 (2000-07-01), Zack
patent: 6097820 (2000-08-01), Turner
patent: 6122610 (2000-09-01), Isabelle
patent: 6163608 (2000-12-01), Romesburg et al.
patent: 6415253 (2002-07-01), Johnson
patent: 6473733 (2002-10-01), McArthur et al.
patent: 6591234 (2003-07-01), Chandran et al.
patent: 6636604 (2003-10-01), Taege
patent: 6647367 (2003-11-01), McArthur et al.
patent: 6810273 (2004-10-01), Mattila et al.

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