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Signal processing method and system for noise removal and signal extraction

  • US 7,519,488 B2
  • Filed: 05/31/2005
  • Issued: 04/14/2009
  • Est. Priority Date: 05/28/2004
  • Status: Expired due to Fees
First Claim
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1. A signal processing method comprising:

  • receiving a signal corrupted with noise;

    performing an n-level decomposition of said signal using a discrete wavelet transform to produce a smooth component and a rough component for each decomposition level;

    inputting the nth level smooth component into a corresponding neural network pre-trained to recognize and extract substantially-noiseless ideal signal feature patterns from the nth level smooth component exclusively;

    performing an inverse discrete wavelet transform on the substantially-noiseless ideal signal feature patterns extracted by the neural network to recover a clean signal, andoutputting the de-noised clean signal.

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