Patents by Inventor Noboru Sugamura

Noboru Sugamura 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).

  • Sound synthesizer
    Patent number: 4393272
    Abstract: The spectral envelope of speech signals are characterized by LSP (line spectral pair) parameters, termed w.sub.i and .theta..sub.i. In a speech synthesizer the control parameters for the filter may be a.sub.i =-2 cos w.sub.i and b.sub.i =-2 cos .theta..sub.i. The synthesizer filter is essentially an all pole filter consisting of two feedback paths each of which has a transfer function having zeroes on a unit circle in the complex plane.
    Type: Grant
    Filed: September 19, 1980
    Date of Patent: July 12, 1983
    Assignee: Nippon Telegraph and Telephone Public Corporation
    Inventors: Fumitada Itakura, Noboru Sugamura