Systems and methods for reducing audio noise

Details Systems and methods for reducing audio noise Systems and methods for reducing audio noise

2011-03-22

2011-03-22

Chin, Vivian (Department: 2614)

Electrical audio signal processing systems and devices

Noise or distortion suppression

Spectral adjustment

C381S094100, C381S094300, C381S094800

Reexamination Certificate

active

07912231

ABSTRACT:
Various embodiments of systems and methods for reducing audio noise are disclosed. One or more sound components such as noise and network tone can be detected based on power spectrum obtained from a time-domain signal. Results of such detection can be used to make decisions in determination of an adjustment spectrum that can be applied to the power spectrum. The adjusted spectrum can be transformed back into a time-domain signal that substantially removes undesirable noise(s) and/or accounts for known sound components such as the network tone.

REFERENCES:
patent: 4628529 (1986-12-01), Borth et al.
patent: 4630305 (1986-12-01), Borth et al.
patent: 4630604 (1986-12-01), Montesi
patent: 5012519 (1991-04-01), Adlersberg et al.
patent: 5706394 (1998-01-01), Wynn
patent: 5933495 (1999-08-01), Oh
patent: 5937060 (1999-08-01), Oh
patent: 6289309 (2001-09-01), de Vries
patent: 6415253 (2002-07-01), Johnson
patent: 6523003 (2003-02-01), Chandran et al.
patent: 6529868 (2003-03-01), Chandran et al.
patent: 6671667 (2003-12-01), Chandran et al.
patent: 6760435 (2004-07-01), Etter et al.
patent: 6766292 (2004-07-01), Chandran et al.
patent: 6810273 (2004-10-01), Mattila et al.
patent: 6980665 (2005-12-01), Kates
patent: 2002/0193130 (2002-12-01), Yang et al.
patent: 2003/0040908 (2003-02-01), Yang et al.
patent: 2003/0101055 (2003-05-01), Son et al.
patent: 2003/0135364 (2003-07-01), Chandran et al.
patent: 2003/0220786 (2003-11-01), Chandran et al.
patent: 2004/0078200 (2004-04-01), Alves
patent: 2004/0148166 (2004-07-01), Zheng
patent: 2005/0027520 (2005-02-01), Matilla et al.
patent: 2005/0143988 (2005-06-01), Endo et al.
patent: 2005/0278172 (2005-12-01), Koishida et al.
patent: 2006/0008101 (2006-01-01), Kates
Yamashita Yukihiko.,“Optimum Sampling Vectors for Wiener Filter Noise Reduction”, Jan. 2002, vol. 50, Issue 1.
Martin Rainer, “Spectral Subtraction Based on Minimum Statistics”, Sep. 1994, pp. 1182-1185, EUSIPCO-94, Edinburgh, Scotland.
David Malah, et al., “Tracking Speech-Presence Uncertainty to Improve Speech Enhancement in Non-stationary Noise Environments”, ICASSP, 1999, vol. 2 pp. 789-792.
Virginie Gilg, et al., “Methodology for the Design of a Robust Voice Activity Detector for Speech Enhancement”, pp- 131-134, IWAENC2003, Sep. 2003, Kyoto Japan.
Stefan Schmitt, et al., “Single Channel Noise Reduction for Hands Free Operation in Automotive Environments”, Audio Engineering Society Convention Paper, May 11-14, 2002, Munich, Germany.
Harald Gustafsson, et al., “Spectral Subtraction Using Reduced Delay Convolution and Adaptive Averaging”; IEEE Transactions on Speech and Audio Processing, vol. 9, No. 8, Nov. 2001, pp. 799-807.
Filiz Basbug, et al., “Noise Reduction and Echo Cancellation Front-End for Speech Codecs”, IEEE Transactions on Speech and Audio Processing, vol. 11, No. 1, Jan. 2003, pp. 1-13.
Hirsch, H. G., “Estimation of Noise Spectrum and its Application to SNR-Estimation and Speech Enhancement”, ICSI Technical Report TR-93-012, Intl. Comp. Science Institute, Berkeley, CA, 1993.
Y. Ephraim, et al., “Speech Enhancement Using a Minimum Mean Square Error Short-Time Spectral Amplitude Estimator, ” IEEE Trans. Acoust., Speech, Signal Processing, vol. ASSP-32 (6), Dec. 1984, pp. 1109-1121.
Firas Jabloun, et al., “Incorporating the Human Hearing Properties in the Signal Subspace Approach for Speech Enhancement”, IEEE Transactions on Speech and Audio Processing, vol. 11, Nov. 2003, No. 6, pp. 700-709.

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