Patents by Inventor Harsha I. K. Rao

Harsha I. K. Rao 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).

  • Multi-channel acoustic echo cancellation system and method
    Patent number: 8284949
    Abstract: Techniques for multi-channel acoustic echo cancellation include adaptive filtering. An adaptive filter can use a lattice predictor of order M coupled to an adaptive LMS/Newton filter of length N, wherein M<N. The lattice predictor can provide decorrelation of the input to the LMS/Newton filter and can provide faster convergence for the LMS/Newton filter. Efficient operation of the LMS/Newton filter can also be provided by using output from the lattice predictor to provide low complexity update of weights for the LMS/Newton filter.
    Type: Grant
    Filed: March 13, 2009
    Date of Patent: October 9, 2012
    Assignee: University of Utah Research Foundation
    Inventors: Behrouz Farhang, Harsha I. K. Rao
  • MULTI-CHANNEL ACOUSTIC ECHO CANCELLATION SYSTEM AND METHOD
    Publication number: 20090262950
    Abstract: Techniques for multi-channel acoustic echo cancellation include adaptive filtering. An adaptive filter can use a lattice predictor of order M coupled to an adaptive LMS/Newton filter of length N, wherein M<N. The lattice predictor can provide decorrelation of the input to the LMS/Newton filter and can provide faster convergence for the LMS/Newton filter. Efficient operation of the LMS/Newton filter can also be provided by using output from the lattice predictor to provide low complexity update of weights for the LMS/Newton filter.
    Type: Application
    Filed: March 13, 2009
    Publication date: October 22, 2009
    Applicant: UNIVERSITY OF UTAH
    Inventors: Behrouz Farhang, Harsha I. K. Rao