Electrical audio signal processing systems and devices – Noise or distortion suppression – Using signal channel and noise channel
Reexamination Certificate
2005-09-13
2005-09-13
Isen, Forester W. (Department: 2644)
Electrical audio signal processing systems and devices
Noise or distortion suppression
Using signal channel and noise channel
Reexamination Certificate
active
06944304
ABSTRACT:
An observed signal that is corrupted with impulse noise is recorded in a signal processing system of an image processing system or a digital subscriber line (xDSL). The observed signal that is recorded by the signal processing system includes a noise component and data component. The signal processing system estimates the parameters of an alpha-stable distribution using a modified iteratively reweighted least squares (IRLS) technique. The estimated parameters define a probability density function that is used to model the noise component of the observed signal. Once the parameters of the alpha-stable distribution are estimated, the signal processing system uses them to estimate model coefficients of a non-linear prediction filter such as a Volterra filter. Using the model coefficients, the non-linear prediction filter estimates the data component of the observed signal.
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Dance Christopher R.
Kuruoglu Ercan E.
Faulk Devona E.
Isen Forester W.
Xerox Corporation
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