Blind adaptive filtering of unknown signals in unknown noise in

Electrical audio signal processing systems and devices – Noise or distortion suppression – Spectral adjustment

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

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".

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Blind adaptive filtering of unknown signals in unknown noise in does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Blind adaptive filtering of unknown signals in unknown noise in , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Blind adaptive filtering of unknown signals in unknown noise in will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1735685

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.