Patents by Inventor H. S. Peter Yue

H. S. Peter Yue 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 apparatus for performing echo cancellation
    Patent number: 6665402
    Abstract: An echo cancellation device for reducing a magnitude of an echo occurring in a voice signal propagating in a channel of a communication system. The echo cancellation device is capable to selectively acquire an active operative mode and an inactive operative mode in response to a condition indicative of a level of echo present in the voice signal. In the active operative mode the echo cancellation device performs echo cancellation on the voice signal. In the inactive operative mode the echo cancellation device allows the voice signal to propagate without performing any echo cancellation.
    Type: Grant
    Filed: August 31, 1999
    Date of Patent: December 16, 2003
    Assignee: Nortel Networks Limited
    Inventors: H. S. Peter Yue, Sylvain Angrignon