Patents by Inventor Kiyohiro Shikano

Kiyohiro Shikano 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).

  • Processing unit, speech recognition apparatus, speech recognition system, speech recognition method, storage medium storing speech recognition program
    Patent number: 8645130
    Abstract: A processing unit is provided which executes speech recognition on speech signals captured by a microphone for capturing sounds uttered in an environment. The processing unit has: an initial reflection component extraction portion that extracts initial reflection components by removing diffuse reverberation components from a reverberation pattern of an impulse response generated in the environment; and an acoustic model learning portion that learns an acoustic model for the speech recognition by reflecting the initial reflection components to speech data for learning.
    Type: Grant
    Filed: November 20, 2008
    Date of Patent: February 4, 2014
    Assignees: Toyota Jidosha Kabushiki Kaisha, National University Corporation Nara Institute of Science and Technology
    Inventors: Narimasa Watanabe, Kiyohiro Shikano, Randy Gomez
  • Apparatus and method for producing an audible speech signal from a non-audible speech signal
    Patent number: 8155966
    Abstract: [Problems] To convert a signal of non-audible murmur obtained through an in-vivo conduction microphone into a signal of a speech that is recognizable for (hardly misrecognized by) a receiving person with maximum accuracy.
    Type: Grant
    Filed: February 7, 2007
    Date of Patent: April 10, 2012
    Assignee: National University Corporation Nara Institute of Science and Technology
    Inventors: Tomoki Toda, Mikihiro Nakagiri, Hideki Kashioka, Kiyohiro Shikano
  • SPEECH PROCESSING METHOD, SPEECH PROCESSING PROGRAM, AND SPEECH PROCESSING DEVICE
    Publication number: 20090326952
    Abstract: [Problems] To convert a signal of non-audible murmur obtained through an in-vivo conduction microphone into a signal of a speech that is recognizable for (hardly misrecognized by) a receiving person with maximum accuracy.
    Type: Application
    Filed: February 7, 2007
    Publication date: December 31, 2009
    Applicant: NATIONAL UNIVERSITY CORPORATION NARA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Tomoki Toda, Mikihiro Nakagiri, Hideki Kashioka, Kiyohiro Shikano
  • PROCESSING UNIT, SPEECH RECOGNITION APPARATUS, SPEECH RECOGNITION SYSTEM, SPEECH RECOGNITION METHOD, STORAGE MEDIUM STORING SPEECH RECOGNITION PROGRAM
    Publication number: 20090281804
    Abstract: A processing unit is provided which executes speech recognition on speech signals captured by a microphone for capturing sounds uttered in an environment. The processing unit has: an initial reflection component extraction portion that extracts initial reflection components by removing diffuse reverberation components from a reverberation pattern of an impulse response generated in the environment; and an acoustic model learning portion that learns an acoustic model for the speech recognition by reflecting the initial reflection components to speech data for learning.
    Type: Application
    Filed: November 20, 2008
    Publication date: November 12, 2009
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, NATIONAL UNIVERSITY CORPORATION NARA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Narimasa Watanabe, Kiyohiro Shikano, Randy Gomez
  • Preparing acoustic models by sufficient statistics and noise-superimposed speech data
    Patent number: 7209881
    Abstract: Noise-superimposed speech data is grouped according to acoustic similarity, and sufficient statistics are prepared using the speech data in each of the groups. A group acoustically similar to voice data of a user of the speech recognition is selected, and sufficient statistics acoustically similar to the user's voice data are selected from the sufficient statistics in the selected group. Using the selected sufficient statistics, an acoustic model is prepared.
    Type: Grant
    Filed: December 18, 2002
    Date of Patent: April 24, 2007
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Shinichi Yoshizawa, Kiyohiro Shikano
  • Method and apparatus for preparing acoustic model and computer program for preparing acoustic model
    Publication number: 20030120488
    Abstract: Noise-superimposed speech data is grouped according to acoustic similarity, and sufficient statistics are prepared using the speech data in each of the groups. A group acoustically similar to voice data of a user of the speech recognition is selected, and sufficient statistics acoustically similar to the user's voice data are selected from the sufficient statistics in the selected group. Using the selected sufficient statistics, an acoustic model is prepared.
    Type: Application
    Filed: December 18, 2002
    Publication date: June 26, 2003
    Inventors: Shinichi Yoshizawa, Kiyohiro Shikano
  • Speech recognition apparatus
    Patent number: 4570232
    Abstract: In a speech recognition system using time-warping for better matching, accuracy and efficiency of dynamic programming computation is improved by expanding the approximated start and end points into an assembly of points, and performing successive iteration for lattice points d.sub.i,j spaced N.gtoreq.3 points apart rather than every lattice point.
    Type: Grant
    Filed: December 9, 1982
    Date of Patent: February 11, 1986
    Assignee: Nippon Telegraph & Telephone Public Corporation
    Inventor: Kiyohiro Shikano