Patents by Inventor Benoit Joseph Felix Champagne

Benoit Joseph Felix Champagne 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).

  • Adaptive echo cancelling system for telephony applications
    Patent number: 6108412
    Abstract: This invention deals with an adaptive echo cancelling system for communication networks. The system includes an adaptive filter for acoustic echo cancellation that uses a combination of echo cancelling and gain control techniques. The main advantages of the combination of these approaches are good communication quality during double talk and easier control of the output echo level.
    Type: Grant
    Filed: October 7, 1997
    Date of Patent: August 22, 2000
    Assignee: Nortel Networks Corporation
    Inventors: Qing-Guang Liu, Benoit Joseph Felix Champagne