Patents by Inventor Philip Mark Crozier

Philip Mark Crozier 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).

  • Patent number: 5742927
    Abstract: A noise reduction apparatus and method for enhancing noisy speech signal which applies to the spectral component signals of a time-varying input signal either a spectral substraction process or a spectral scaling process followed by signal attenuation in regions of the frequency spectrum lying between identified formant regions.
    Type: Grant
    Filed: October 11, 1995
    Date of Patent: April 21, 1998
    Assignee: British Telecommunications Public Limited Company
    Inventors: Philip Mark Crozier, Barry Michael George Cheetham