Patents by Inventor Kazuhiro Katagiri

Kazuhiro Katagiri 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: 11127396
    Abstract: There are provided a target area sound extraction unit that, based on input signals input from plural microphone arrays, acquires beam former outputs from each of the microphone arrays, and uses the acquired beam former outputs to perform target area sound extraction processing to extract a target area sound taking a target area as a sound source, so as to thereby acquire an area sound acquisition output, and a restoration device that restores components of the target area sound in a frequency bandwidth having a predetermined range that was suppressed in the target area sound extraction processing.
    Type: Grant
    Filed: July 17, 2019
    Date of Patent: September 21, 2021
    Assignees: Oki Electric Industry Co., Ltd., FEAT Limited
    Inventors: Takashi Yazu, Kazuhiro Katagiri, Akihiko Arimitsu
  • Patent number: 11095979
    Abstract: The present invention relates to a sound pick-up apparatus.
    Type: Grant
    Filed: November 20, 2019
    Date of Patent: August 17, 2021
    Assignee: Oki Electric Industry Co., Ltd.
    Inventor: Kazuhiro Katagiri
  • Publication number: 20200304907
    Abstract: The present invention relates to a sound pick-up apparatus.
    Type: Application
    Filed: November 20, 2019
    Publication date: September 24, 2020
    Applicant: Oki Electric Industry Co., Ltd.
    Inventor: Kazuhiro KATAGIRI
  • Publication number: 20200105253
    Abstract: There are provided a target area sound extraction unit that, based on input signals input from plural microphone arrays, acquires beam former outputs from each of the microphone arrays, and uses the acquired beam former outputs to perform target area sound extraction processing to extract a target area sound taking a target area as a sound source, so as to thereby acquire an area sound acquisition output, and a restoration device that restores components of the target area sound in a frequency bandwidth having a predetermined range that was suppressed in the target area sound extraction processing.
    Type: Application
    Filed: July 17, 2019
    Publication date: April 2, 2020
    Applicants: Oki Electric Industry Co., Ltd., FEAT Limited
    Inventors: Takashi YAZU, Kazuhiro KATAGIRI, Akihiko ARIMITSU
  • Patent number: 10085087
    Abstract: A sound pick-up device of the present disclosure acquires extracted sound as a result of extracting target area sound using non-target area sound present in a target area direction from output of a beam former, divides each of an input signal and the extracted sound into plural bands, computes a power spectrum ratio between the input signal and the extracted sound for each divided band, determines whether or not target area sound is present in the input signal by employing the power spectrum ratios for each divided band, and outputs the extracted sound as a sound pick-up result in cases in which target area sound has been determined to be present.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: September 25, 2018
    Assignee: Oki Electric Industry Co., Ltd.
    Inventor: Kazuhiro Katagiri
  • Publication number: 20180242078
    Abstract: A sound pick-up device of the present disclosure acquires extracted sound as a result of extracting target area sound using non-target area sound present in a target area direction from output of a beam former, divides each of an input signal and the extracted sound into plural bands, computes a power spectrum ratio between the input signal and the extracted sound for each divided band, determines whether or not target area sound is present in the input signal by employing the power spectrum ratios for each divided band, and outputs the extracted sound as a sound pick-up result in cases in which target area sound has been determined to be present.
    Type: Application
    Filed: December 19, 2017
    Publication date: August 23, 2018
    Applicant: Oki Electric Industry Co., Ltd.
    Inventor: Kazuhiro KATAGIRI
  • Patent number: 9986332
    Abstract: To improve, when area sound pick-up is performed to collect sounds from a sound source in a target area, the sound quality of the collected sounds. The present invention relates to a sound pick-up apparatus that performs area sound pick-up. The sound pick-up apparatus calculates a sound volume level of a mixing signal to mix with a target area sound on the basis of power of estimated noise obtained by estimating background noise included in an input signal input from a microphone array, and power of a non-target area sound, adjusts a sound volume level of the input signal, and a sound volume level of the estimated noise to mix with the mixing signal on the basis of the sound volume level of the calculated mixing signal, and generates and outputs a mixed target area sound with which the input signal that is adjusted to have the calculated sound volume level and the estimated noise that is adjusted to have the calculated sound volume level are mixed.
    Type: Grant
    Filed: December 13, 2016
    Date of Patent: May 29, 2018
    Assignee: OKI ELECTRIC INDUSTRY CO., LTD.
    Inventor: Kazuhiro Katagiri
  • Patent number: 9877133
    Abstract: The sound collection and reproduction system reproduces comprise: a microphone array selection unit which selects a microphone arrays; an area sound collection unit which collects sounds of all areas by using the microphone arrays; an area sound selection unit which selects an area sound of an area corresponding to a specified listening position, and area sounds of surrounding areas of this area corresponding to a listening direction, in accordance with a sound reproduction environment; an area volume adjustment unit which adjusts a volume of each area sound unit in accordance with a distance from the specified listening position; and a stereophonic sound processing unit which performs a stereophonic sound process, for each area sound to which volume adjustment has been performed by the area volume adjustment unit, by using a transfer function corresponding to a sound reproduction environment.
    Type: Grant
    Filed: June 1, 2015
    Date of Patent: January 23, 2018
    Assignee: Oki Electric Industry Co., Ltd.
    Inventor: Kazuhiro Katagiri
  • Patent number: 9866957
    Abstract: There is provided a sound collection apparatus, including a directionality formation unit configured to form a directionality in a direction of a target area for input signals from a plurality of microphone arrays, a target area sound extraction unit configured to correct a delay between a target area and each of the microphone arrays, and a power of a target area sound component for an output from the directionality formation unit, suppress a non-target area sound by using each output after correction, and extract a target area sound, an area sound enhancement filter formation unit, and an area sound emphasis unit.
    Type: Grant
    Filed: May 18, 2016
    Date of Patent: January 9, 2018
    Assignee: Oki Electric Industry Co., Ltd.
    Inventor: Kazuhiro Katagiri
  • Publication number: 20170289677
    Abstract: To improve, when area sound pick-up is performed to collect sounds from a sound source in a target area, the sound quality of the collected sounds. The present invention relates to a sound pick-up apparatus that performs area sound pick-up. The sound pick-up apparatus calculates a sound volume level of a mixing signal to mix with a target area sound on the basis of power of estimated noise obtained by estimating background noise included in an input signal input from a microphone array, and power of a non-target area sound, adjusts a sound volume level of the input signal, and a sound volume level of the estimated noise to mix with the mixing signal on the basis of the sound volume level of the calculated mixing signal, and generates and outputs a mixed target area sound with which the input signal that is adjusted to have the calculated sound volume level and the estimated noise that is adjusted to have the calculated sound volume level are mixed.
    Type: Application
    Filed: December 13, 2016
    Publication date: October 5, 2017
    Applicant: Oki Electric Industry Co., Ltd.
    Inventor: Kazuhiro KATAGIRI
  • Patent number: 9781508
    Abstract: A sound pickup device is provided, the device including (1) a directionality forming unit that forms directionality to output of a microphone array, (2) a target area sound extraction unit that extracts non-target area sound from output of the directionality forming unit, and that suppresses non-target area sound components extracted from output of the directionality forming unit so as to extract target area sound, (3) a determination information computation unit that computes determination information, (4) an area sound determination unit that determines whether or not target area sound is present using the determination information computed by the determination information computation unit, and (5) an output unit that outputs the target area sound extracted only in cases in which the target area sound is determined to be present by the area sound determination unit.
    Type: Grant
    Filed: December 17, 2015
    Date of Patent: October 3, 2017
    Assignee: Oki Electric Industry Co., Ltd.
    Inventor: Kazuhiro Katagiri
  • Patent number: 9549255
    Abstract: A sound pickup apparatus and method form a bidirectionality and a unidirectionality based on sound signals picked up by microphones arranged at vertices of a triangle. A target sound is extracted by performing a spectral subtraction operation and, with respect to each frequency, a ratio of amplitude spectra of beamformer outputs between outputs is calculated for each microphone array of a directionality forming unit. A mode or median of the calculated ratio of amplitude spectra is set as a correction coefficient which corrects power of beamformer outputs for each of the microphone arrays and a target area sound is extracted.
    Type: Grant
    Filed: August 12, 2016
    Date of Patent: January 17, 2017
    Assignee: Oki Electric Industry Co., Ltd.
    Inventor: Kazuhiro Katagiri
  • Publication number: 20170013357
    Abstract: There is provided a sound collection apparatus, including a directionality formation unit configured to form a directionality in a direction of a target area for input signals from a plurality of microphone arrays, a target area sound extraction unit configured to correct a delay between a target area and each of the microphone arrays, and a power of a target area sound component for an output from the directionality formation unit, suppress a non-target area sound by using each output after correction, and extract a target area sound, an area sound enhancement filter formation unit, and an area sound emphasis unit.
    Type: Application
    Filed: May 18, 2016
    Publication date: January 12, 2017
    Applicant: Oki Electric Industry Co., Ltd.
    Inventor: Kazuhiro KATAGIRI
  • Publication number: 20160353203
    Abstract: A sound pickup apparatus and method form a bidirectionality and a unidirectionality based on sound signals picked up by microphones arranged at vertices of a triangle. A target sound is extracted by performing a spectral subtraction operation and, with respect to each frequency, a ratio of amplitude spectra of beamformer outputs between outputs is calculated for each microphone array of a directionality forming unit. A mode or median of the calculated ratio of amplitude spectra is set as a correction coefficient which corrects power of beamformer outputs for each of the microphone arrays and a target area sound is extracted.
    Type: Application
    Filed: August 12, 2016
    Publication date: December 1, 2016
    Applicant: Oki Electric Industry Co., Ltd.
    Inventor: Kazuhiro KATAGIRI
  • Patent number: 9445194
    Abstract: There is provided a sound source separating apparatus including a bidirectionality forming unit configured to form a bidirectionality by use of a sound signal picked up by two microphones which are located to be horizontal with respect to the target direction, among three microphones disposed at vertexes of an isosceles right triangle, a unidirectionality forming unit configured to form a unidirectionality by use of a sound signal picked up by two microphones which are located in a same direction as the target direction, among the three microphones, and a target sound extracting unit configured to extract a target sound by performing a spectral subtraction of all outputs from the bidirectionality forming unit and the unidirectionality forming unit from a signal.
    Type: Grant
    Filed: June 19, 2014
    Date of Patent: September 13, 2016
    Assignee: Oki Electric Industry Co., Ltd.
    Inventor: Kazuhiro Katagiri
  • Publication number: 20160198258
    Abstract: A sound pickup device is provided, the device including (1) a directionality forming unit that forms directionality to output of a microphone array, (2) a target area sound extraction unit that extracts non-target area sound from output of the directionality forming unit, and that suppresses non-target area sound components extracted from output of the directionality forming unit so as to extract target area sound, (3) a determination information computation unit that computes determination information, (4) an area sound determination unit that determines whether or not target area sound is present using the determination information computed by the determination information computation unit, and (5) an output unit that outputs the target area sound extracted only in cases in which the target area sound is determined to be present by the area sound determination unit.
    Type: Application
    Filed: December 17, 2015
    Publication date: July 7, 2016
    Applicant: Oki Electric Industry Co., Ltd.
    Inventor: Kazuhiro KATAGIRI
  • Publication number: 20160021478
    Abstract: The sound collection and reproduction system reproduces comprise: a microphone array selection unit which selects a microphone arrays; an area sound collection unit which collects sounds of all areas by using the microphone arrays; an area sound selection unit which selects an area sound of an area corresponding to a specified listening position, and area sounds of surrounding areas of this area corresponding to a listening direction, in accordance with a sound reproduction environment; an area volume adjustment unit which adjusts a volume of each area sound unit in accordance with a distance from the specified listening position; and a stereophonic sound processing unit which performs a stereophonic sound process, for each area sound to which volume adjustment has been performed by the area volume adjustment unit, by using a transfer function corresponding to a sound reproduction environment.
    Type: Application
    Filed: June 1, 2015
    Publication date: January 21, 2016
    Applicant: OKI ELECTRIC INDUSTRY CO., LTD.
    Inventor: Kazuhiro KATAGIRI
  • Patent number: 9123351
    Abstract: A speech segment determination device includes a frame division portion, a power spectrum calculation portion, a power spectrum operation portion, a spectral entropy calculation portion and a determination portion. The frame division portion divides an input signal in units of frames. The power spectrum calculation portion calculates, using an analysis length, a power spectrum of the input signal for each of the frames that have been divided. The power spectrum operation portion adds a value of the calculated power spectrum to a value of power spectrum in each of frequency bins. The spectral entropy calculation portion calculates spectral entropy using the power spectrum whose value has been increased. The determination portion determines, based on a value of the spectral entropy, whether the input signal is a signal in a speech segment.
    Type: Grant
    Filed: February 17, 2012
    Date of Patent: September 1, 2015
    Assignee: Oki Electric Industry Co., Ltd.
    Inventor: Kazuhiro Katagiri
  • Publication number: 20150063590
    Abstract: There is provided a sound source separating apparatus including a bidirectionality forming unit configured to form a bidirectionality by use of a sound signal picked up by two microphones which are located to be horizontal with respect to the target direction, among three microphones disposed at vertexes of an isosceles right triangle, a unidirectionality forming unit configured to form a unidirectionality by use of a sound signal picked up by two microphones which are located in a same direction as the target direction, among the three microphones, and a target sound extracting unit configured to extract a target sound by performing a spectral subtraction of all outputs from the bidirectionality forming unit and the unidirectionality forming unit from a signal.
    Type: Application
    Filed: June 19, 2014
    Publication date: March 5, 2015
    Applicant: Oki Electric Industry Co., Ltd.
    Inventor: Kazuhiro KATAGIRI
  • Publication number: 20120253813
    Abstract: A speech segment determination device includes a frame division portion, a power spectrum calculation portion, a power spectrum operation portion, a spectral entropy calculation portion and a determination portion. The frame division portion divides an input signal in units of frames. The power spectrum calculation portion calculates, using an analysis length, a power spectrum of the input signal for each of the frames that have been divided. The power spectrum operation portion adds a value of the calculated power spectrum to a value of power spectrum in each of frequency bins. The spectral entropy calculation portion calculates spectral entropy using the power spectrum whose value has been increased. The determination portion determines, based on a value of the spectral entropy, whether the input signal is a signal in a speech segment.
    Type: Application
    Filed: February 17, 2012
    Publication date: October 4, 2012
    Applicant: OKI ELECTRIC INDUSTRY CO., LTD.
    Inventor: Kazuhiro KATAGIRI