Method and apparatus for reducing random, continuous...

Details Method and apparatus for reducing random, continuous... Method and apparatus for reducing random, continuous...

2006-10-24

2006-10-24

Grier, Laura A. (Department: 2615)

Electrical audio signal processing systems and devices

Noise or distortion suppression

C381S071100, C381S071120, C381S094200, C704S228000

Reexamination Certificate

active

07127072

ABSTRACT:
There are provided a method and an apparatus for reducing random, continuous, non-stationary noise in audio signals, the noisy audio signal being filtered by means of a predetermined filter function. The filter function is determined dynamically having regard to the current properties of the noisy audio signal and/or its constituent parts, and the filter function is also limited dynamically having regard to the current properties of the noise component contained in the noisy audio signal.

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“Subband Noise Reduction Methods For Speech Enhancement,” by Eric J. Diethorn, Microelectronics and Communications Tech. Mar. 2000, ISBN 0-792307814-9.
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“Enhancement of Speech Corrupted By Acoustic Noise,” by M. Berouti, et al. IEEE ICASSP, p. 208-211.
“Comparison of One- and Two-Channel Noise-Estimation Techniques,” by Joerg Meyer, et al. vol. 1 pp. 17-20, Sep. 1997.
“Digitale Sprachsignalverarbeitung,” P. Vary, et al, Teubner Verlag, Stuttgart 1998, ISBN 3-519-0616501, pp. 380-390.

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