Patents by Inventor David E. Duehren

David E. Duehren 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).

  • Automatic gain control for adjusting gain during non-speech portions
    Patent number: 7155385
    Abstract: An estimate is made of the power of a speech portion of a speech signal that includes speech portions separated by non-speech portions, the power for the speech portion being estimated based on a power envelope that spans the speech portion. The gain of an automatic gain control is not adjusted during the speech portions.
    Type: Grant
    Filed: May 16, 2002
    Date of Patent: December 26, 2006
    Assignee: Comerica Bank, as Administrative Agent
    Inventors: Alexander Berestesky, David E. Duehren