Patents by Inventor Shin-ichi Tsurufuji

Shin-ichi Tsurufuji 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: 6411928
    Abstract: A voice recognition method and apparatus in which an electrical signal corresponding to ambient noise is used to set a threshold value in accordance with the level of the ambient noise and a voice signal applied to a microphone is cut-out for processing if it exceeds the threshold value. The processing includes comparison of the voice signal cut-out with stored patterns of voice signals.
    Type: Grant
    Filed: July 21, 1997
    Date of Patent: June 25, 2002
    Assignee: Sanyo Electric
    Inventors: Shin-ichi Tsurufuji, Masayuki Iida, Ryuji Suzuki
  • Publication number: 20010029449
    Abstract: A voice recognizing apparatus includes a filter bank for deriving feature parameters of voice from a microphone and a filter bank for deriving feature parameters of noise represented by an electric signal which is directly inputted to a terminal. The voice parameters and the noise parameters are respectively stored in a voice parameter buffer and a noise parameter buffer. A threshold value for sampling the voice parameters is set to be changed in accordance with a noise level for each frame. From a series of the voice parameters exceeding the threshold value, a series of the noise parameters corresponding thereto are subtracted so that only a voice parameter pattern can be obtained. In a recognition mode, the voice pattern is compared with a reference pattern to recognize the voice from the microphone. In addition, in a registration mode, the voice pattern is registered as a reference pattern.
    Type: Application
    Filed: July 21, 1997
    Publication date: October 11, 2001