Patents by Inventor Kiyoaki Aikawa

Kiyoaki Aikawa 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).

  • Dialogue-type information providing apparatus, dialogue-type information providing processing method, and program and recording medium for the same
    Patent number: 7251595
    Abstract: The invention makes it possible to avoid an increase in the number of confirmation sentences and response sentences output to the user which gives dissatisfaction for the user by the increase that occur due to recognition errors.
    Type: Grant
    Filed: January 29, 2002
    Date of Patent: July 31, 2007
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Norihito Yasuda, Kohji Dohsaka, Kiyoaki Aikawa
  • Dialogue-type information providing apparatus, dialogue-type information providing processing method, and program and recording medium for the same
    Publication number: 20020169594
    Abstract: The invention makes it possible to avoid an increase in the number of confirmation sentences and response sentences output to the user which gives dissatisfaction for the user by the increase that occur due to recognition errors.
    Type: Application
    Filed: January 29, 2002
    Publication date: November 14, 2002
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Norihito Yasuda, Kohji Dohsaka, Kiyoaki Aikawa
  • Speech recognition method using time-frequency masking mechanism
    Patent number: 5459815
    Abstract: A speech recognition method in which input speech signals are converted to digital signals and then time sequentially converted to cepstrum coefficients or logarithmic spectra. Dynamic spectrum time sequence is obtained by time frequency filtering of cepstrum coefficients, or masked spectrum time sequence is obtained by time frequency masking of the logarithmic vector time sequence. Based on the dynamic cepstrum time sequence or masked spectrum time sequence obtained in this manner, speech is recognized.
    Type: Grant
    Filed: June 21, 1993
    Date of Patent: October 17, 1995
    Assignee: ATR Auditory and Visual Perception Research Laboratories
    Inventors: Kiyoaki Aikawa, Hideki Kawahara, Yoh'ichi Tohkura