Patents by Inventor David Lee Rowley

David Lee Rowley 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).

  • Acoustic echo cancellation for high noise and excessive double talk
    Patent number: 8934620
    Abstract: Methods and devices for improved echo cancellation in high noise environments, such as in-car speakerphones and the like, are provided that improve cancellation convergence in a high noise environment and in the presence of double talk. A new update method enables a robust echo canceller to update with reduced concern for the canceller being in a receive state or a double talk state. If a signal generated by a local talker is substantially the same as high noise, in terms of corruption of the echo canceller, the echo canceller converges in a robust manner even with continuous high noise at the input.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: January 13, 2015
    Assignee: Cogent Signals, Inc.
    Inventor: David Lee Rowley
  • ACOUSTIC ECHO CANCELLATION FOR HIGH NOISE AND EXCESSIVE DOUBLE TALK
    Publication number: 20120250852
    Abstract: Methods and devices for improved echo cancellation in high noise environments, such as in-car speakerphones and the like, are provided that improve cancellation convergence in a high noise environment and in the presence of double talk. A new update method enables a robust echo canceller to update with reduced concern for the canceller being in a receive state or a double talk state. If a signal generated by a local talker is substantially the same as high noise, in terms of corruption of the echo canceller, the echo canceller converges in a robust manner even with continuous high noise at the input.
    Type: Application
    Filed: March 30, 2012
    Publication date: October 4, 2012
    Applicant: COGENT SIGNALS, INC.
    Inventor: David Lee Rowley