Patents by Inventor Keiichi Imaoka

Keiichi Imaoka 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).

  • Speaker device and audio signal processing method
    Patent number: 10038963
    Abstract: A speaker apparatus includes an input portion to which audio signals of a plurality of channels are input, a plurality of speakers, a directivity controlling portion that delays the audio signals of the plurality of channels input to the input portion and distributes the delayed audio signals to the plurality of speakers so that the plurality of speakers output a plurality of sound beams, and a localization adding portion that applies a filtering processing based on a head-related transfer function to at least one of the audio signals of the plurality of channels input to the input portion and inputs the processed audio signal to the plurality of speakers.
    Type: Grant
    Filed: March 29, 2017
    Date of Patent: July 31, 2018
    Assignee: Yamaha Corporation
    Inventors: Masaki Katayama, Susumu Takumai, Keiichi Imaoka
  • Speaker Device and Audio Signal Processing Method
    Publication number: 20170201846
    Abstract: A speaker apparatus includes an input portion to which audio signals of a plurality of channels are input, a plurality of speakers, a directivity controlling portion that delays the audio signals of the plurality of channels input to the input portion and distributes the delayed audio signals to the plurality of speakers so that the plurality of speakers output a plurality of sound beams, and a localization adding portion that applies a filtering processing based on a head-related transfer function to at least one of the audio signals of the plurality of channels input to the input portion and inputs the processed audio signal to the plurality of speakers.
    Type: Application
    Filed: March 29, 2017
    Publication date: July 13, 2017
    Inventors: Masaki KATAYAMA, Susumu Takumai, Keiichi Imaoka
  • Speaker device and audio signal processing method
    Patent number: 9674609
    Abstract: A speaker apparatus includes an input portion to which audio signals of a plurality of channels are input, a plurality of speakers, a directivity controlling portion that delays the audio signals of the plurality of channels input to the input portion and distributes the delayed audio signals to the plurality of speakers so that the plurality of speakers output a plurality of sound beams, and a localization adding portion that applies a filtering processing based on a head-related transfer function to at least one of the audio signals of the plurality of channels input to the input portion and inputs the processed audio signal to the plurality of speakers.
    Type: Grant
    Filed: August 19, 2014
    Date of Patent: June 6, 2017
    Assignee: Yamaha Corporation
    Inventors: Masaki Katayama, Susumu Takumai, Keiichi Imaoka
  • Speaker Device and Audio Signal Processing Method
    Publication number: 20150237446
    Abstract: A speaker apparatus includes an input portion to which audio signals of a plurality of channels are input, a plurality of speakers, a directivity controlling portion that delays the audio signals of the plurality of channels input to the input portion and distributes the delayed audio signals to the plurality of speakers so that the plurality of speakers output a plurality of sound beams, and a localization adding portion that applies a filtering processing based on a head-related transfer function to at least one of the audio signals of the plurality of channels input to the input portion and inputs the processed audio signal to the plurality of speakers.
    Type: Application
    Filed: August 19, 2014
    Publication date: August 20, 2015
    Inventors: Masaki Katayama, Susumu Takumai, Keiichi Imaoka