Patents by Inventor Ryou Ikezawa

Ryou Ikezawa 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 hearing assistance with speech speed control function
    Patent number: 5305420
    Abstract: A method and an apparatus for hearing assistance, capable of compensating the lowering of the speech recognition ability related to the deterioration of the auditory sense center. The input speech is divided into voiced speech sections, unvoiced speech sections, and silent sections, of which the voiced speech sections and the silent sections are appropriately extended/contracted while the unvoiced speech sections are left unchanged, and then these sections are combined in an identical order as in the input speech, so as to obtain output speech which is easier to listen for a listener with a handicapped hearing ability.
    Type: Grant
    Filed: September 22, 1992
    Date of Patent: April 19, 1994
    Assignee: Nippon Hoso Kyokai
    Inventors: Akira Nakamura, Ryou Ikezawa, Nobumasa Seiyama, Tohru Takagi, Eiichi Miyasaka