Blind adaptive filtering of unknown signals in unknown noise in

Details Blind adaptive filtering of unknown signals in unknown noise in Blind adaptive filtering of unknown signals in unknown noise in

1996-04-16

1998-06-16

Isen, Forester W.

Electrical audio signal processing systems and devices

Noise or distortion suppression

Spectral adjustment

381 942, H04B 1500

Patent

active

057683921

ABSTRACT:
A method and system for blind adaptive filtering an input signal having noise and information signal parameters that are separated by an identifier. An open loop filter stage generates an intermediate filtered signal from the noise parameters and the input signal parameters. A cost function generator generates a first cost function signal and an inverse first cost function signal from the open loop filter parameters. A residual signal is generated from the difference between the input signal and the intermediate filtered signal. Another cost function generator, coupled to the input signal and the residual signal generator, generates a second cost function signal and an inverse second cost function that maximize a stationarity feature of the residual signal. A combiner generates a combined cost function from the inverse first and second cost functions. A quasi-closed loop filter generates the filtered output signal from the intermediate filtered signal.

REFERENCES:
patent: 4811404 (1989-03-01), Vilmur et al.
patent: 4918633 (1990-04-01), Sullivan
patent: 5012519 (1991-04-01), Aldersberg et al.
patent: 5432859 (1995-07-01), Yang et al.
Mallat, "A Theory for Multiresolution Signal Decomposition: The Wavelet Representation", IEEE Transactions On Pattern Analysis and Machine Intelligence, vol. II, No. 7, Jul., 1989.
Graupe, et al., "Self Adaptive Filtering of Noise from Speech: A Hearing Aid Application".
Weerackody et al., "Variable Step-Size Blind Adaptive Equalization Algorithms".
Graupe et al., "An Adaptive-Control-Based Noise Cancellation Approach".
"An Output-Whitening Approach to Adaptive Active Noise Cancellation", IEEE Transactions On Circuits and Systems, vol. 38, No. 11, Nov., 1991.
D. Graupe, "Blind Adaptive Filtering of Unknown Speech From Unknown Noise In A Single Receiver Situation".

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