Patents by Inventor Dequn Sun

Dequn Sun has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and system for processing subband signals using adaptive filters
    Patent number: 7783032
    Abstract: A method and system for processing subband signals using adaptive filters is provided. The system is implemented on an oversampled WOLA filterbank. Inputs signals are oversampled. The system includes an adaptive filter for each subband, and the functionality of improving the convergence properties of the adaptive filter. For example, the convergence property is improved by whitening the spectra of the oversampled subband signals and/or affine projection algorithm. The system is applicable to echo and/or noise cancellation. Adaptive step size control, adaptation process control using Double-Talk detector may be implemented. The system may further implement a non-adaptive processing for reducing uncorrelated noise and/or cross-talk resistant adaptive noise cancellation.
    Type: Grant
    Filed: August 18, 2003
    Date of Patent: August 24, 2010
    Assignee: Semiconductor Components Industries, LLC
    Inventors: Hamid Reza Abutalebi, Robert L. Brennan, Hamid Sheikhzadeh-Nadjar, Dequn Sun
  • Method and system for processing subband signals using adaptive filters
    Publication number: 20040071284
    Abstract: A method and system for processing subband signals using adaptive filters is provided. The system is implemented on an oversampled WOLA filterbank. Inputs signals are oversampled. The system includes an adaptive filter for each subband, and the functionality of improving the convergence properties of the adaptive filter. For example, the convergence property is improved by whitening the spectra of the oversampled subband signals and/or affine projection algorithm. The system is applicable to echo and/or noise cancellation. Adaptive step size control, adaptation process control using Double-Talk detector may be implemented. The system may further implement a non-adaptive processing for reducing uncorrelated noise and/or cross-talk resistant adaptive noise cancellation.
    Type: Application
    Filed: August 18, 2003
    Publication date: April 15, 2004
    Inventors: Hamid Reza Abutalebi, Robert L. Brennan, Hamid Sheikhzadeh-Nadjar, Dequn Sun