Patents by Inventor Sandeep Ghael

Sandeep Ghael 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).

  • System and method of using two coefficient banks in an adaptive echo canceller
    Patent number: 7062038
    Abstract: A device has a first echo canceller having a first bank of coefficients to be applied to a reference signal to produce a first echo prediction signal, and a first arithmetic unit to combine the first echo prediction signal with the echo-bearing signal to produce a first echo-cancelled signal. A second echo canceller receives the reference signal and the first echo-canceled signal, and has a second bank of coefficients to be applied to the reference signal to produce a second echo prediction signal. The second bank of coefficients is adapted to improve echo cancellation in the second echo canceller. A second arithmetic unit combines the first echo-cancelled signal with the second echo-prediction signal to produce a second echo-cancelled signal.
    Type: Grant
    Filed: December 16, 2003
    Date of Patent: June 13, 2006
    Assignee: Cisco Technology, Inc.
    Inventors: Hugh Joseph McLaughlin, Jeffrey Lynn Schenck, Sandeep Ghael