Patents by Inventor Philip John Sheppard

Philip John Sheppard 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).

  • Analysis of audio quality using speech recognition and synthesis
    Patent number: 5848384
    Abstract: An apparatus for monitoring signal quality in a communications link is provided which recognizes speech elements in signals received over the communications link and generates therefrom an estimate of the original speech signal, and compares the estimated signal with the actual received signal to provide an output based on the comparison.
    Type: Grant
    Filed: January 13, 1997
    Date of Patent: December 8, 1998
    Assignee: British Telecommunications Public Limited Company
    Inventors: Michael Peter Hollier, Philip John Sheppard