Patents by Inventor Kazuhisa Kotegawa

Kazuhisa Kotegawa 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).

  • Publication number: 20210306745
    Abstract: An active noise reduction device includes: an impulsive signal generator that generates an impulsive signal; a signal output unit that outputs the impulsive signal to a loudspeaker; a signal detector that detects a rising signal and a falling signal from a microphone signal outputted from a microphone collecting sound; a connection determiner that determines, based on respective peak values of the rising signal detected and the falling signal detected, whether or not the loudspeaker is connected to the signal output unit; and a polarity determiner that determines a connection polarity between the loudspeaker and the signal output unit based on respective timings of the rising signal and the falling signal with respect to the impulsive signal, when it is determined that the loudspeaker is connected to the signal output unit.
    Type: Application
    Filed: March 23, 2021
    Publication date: September 30, 2021
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Shota YANAGI, Kazuhisa KOTEGAWA
  • Patent number: 10685637
    Abstract: A noise masking device includes: an acquisition unit that acquires (i) frequency information indicating a frequency of a noise in a vehicle or frequency-correlated information correlated to the frequency and (ii) vehicle information relating to a characteristic of the noise; a signal source that generates a masker signal for outputting a masker sound that masks the noise in the vehicle; a pitch-shifting unit that pitch-shifts the masker signal according to the frequency information or the frequency-correlated information acquired by the acquisition unit to generate a pitch-shifted masker signal; an adjustment unit that performs, on the pitch-shifted masker signal, an adjustment according to the vehicle information acquired by the acquisition unit to generate an adjusted masker signal; and an output unit that outputs the adjusted masker signal as the masker sound.
    Type: Grant
    Filed: November 1, 2018
    Date of Patent: June 16, 2020
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Kazuhisa Kotegawa, Kiyohisa Higashi
  • Patent number: 10290295
    Abstract: Provided is a sound masking device that can effectively mask a noise at a predetermined position in a vehicle. Sound masking device includes: information acquisition unit that acquires frequency information indicating a frequency of a noise; signal source that generates a masker signal in order to output a masker sound masking the noise; pitch shifting unit that performs pitch shifting on the masker signal according to the frequency information that has been acquired; first corrector that performs correction on the masker signal after the pitch shifting according to the predetermined position; and output unit that outputs the masker signal after the correction.
    Type: Grant
    Filed: December 5, 2017
    Date of Patent: May 14, 2019
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Kazuhisa Kotegawa, Kiyohisa Higashi
  • Publication number: 20190130887
    Abstract: A noise masking device includes: an acquisition unit that acquires (i) frequency information indicating a frequency of a noise in a vehicle or frequency-correlated information correlated to the frequency and (ii) vehicle information relating to a characteristic of the noise; a signal source that generates a masker signal for outputting a masker sound that masks the noise in the vehicle; a pitch-shifting unit that pitch-shifts the masker signal according to the frequency information or the frequency-correlated information acquired by the acquisition unit to generate a pitch-shifted masker signal; an adjustment unit that performs, on the pitch-shifted masker signal, an adjustment according to the vehicle information acquired by the acquisition unit to generate an adjusted masker signal; and an output unit that outputs the adjusted masker signal as the masker sound.
    Type: Application
    Filed: November 1, 2018
    Publication date: May 2, 2019
    Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LT D.
    Inventors: Kazuhisa KOTEGAWA, Kiyohisa HIGASHI
  • Publication number: 20180166061
    Abstract: Provided is a sound masking device that can effectively mask a noise at a predetermined position in a vehicle. Sound masking device includes: information acquisition unit that acquires frequency information indicating a frequency of a noise; signal source that generates a masker signal in order to output a masker sound masking the noise; pitch shifting unit that performs pitch shifting on the masker signal according to the frequency information that has been acquired; first corrector that performs correction on the masker signal after the pitch shifting according to the predetermined position; and output unit that outputs the masker signal after the correction.
    Type: Application
    Filed: December 5, 2017
    Publication date: June 14, 2018
    Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Kazuhisa KOTEGAWA, Kiyohisa HIGASHI
  • Patent number: 9036856
    Abstract: Provided is a sound reproduction device including: a first loudspeaker having directionality utilizing a parametric effect; a second loudspeaker having directionality broader than that of the first loudspeaker; an orientation adjustment unit configured to change an orientation of the first loudspeaker; an information obtaining device configured to obtain positional information of a listener; and a drive controller electrically connected to the first loudspeaker, the second loudspeaker, the orientation adjustment unit, and the information obtaining device, and configured to control the orientation of the first loudspeaker based on the positional information of the listener.
    Type: Grant
    Filed: March 4, 2014
    Date of Patent: May 19, 2015
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Katsu Takeda, Fumiyasu Konno, Kazuhisa Kotegawa
  • Patent number: 8855333
    Abstract: An ultrasonic speaker system has a first variable gain block, a modulation block, a second variable gain block, an ultrasonic actuator, and a controller, wherein the controller controls gain of the first variable gain block so that a modulation degree of a modulated signal becomes a predetermined value, and when the controller raises the gain of the first variable gain block, the controller lowers the gain of the second variable gain block, while when the controller lowers the gain of the first variable gain block, the controller raises the gain of the second variable gain block.
    Type: Grant
    Filed: January 6, 2014
    Date of Patent: October 7, 2014
    Assignee: Panasonic Corporation
    Inventors: Kazuhisa Kotegawa, Fumiyasu Konno, Katsu Takeda
  • Publication number: 20140254811
    Abstract: Provided is a sound reproduction device including: a first loudspeaker having directionality utilizing a parametric effect; a second loudspeaker having directionality broader than that of the first loudspeaker; an orientation adjustment unit configured to change an orientation of the first loudspeaker; an information obtaining device configured to obtain positional information of a listener; and a drive controller electrically connected to the first loudspeaker, the second loudspeaker, the orientation adjustment unit, and the information obtaining device, and configured to control the orientation of the first loudspeaker based on the positional information of the listener.
    Type: Application
    Filed: March 4, 2014
    Publication date: September 11, 2014
    Applicant: PANASONIC CORPORATION
    Inventors: Katsu TAKEDA, Fumiyasu KONNO, Kazuhisa KOTEGAWA
  • Publication number: 20140233760
    Abstract: An ultrasonic speaker system has a first variable gain block, a modulation block, a second variable gain block, an ultrasonic actuator, and a controller, wherein the controller controls gain of the first variable gain block so that a modulation degree of a modulated signal becomes a predetermined value, and when the controller raises the gain of the first variable gain block, the controller lowers the gain of the second variable gain block, while when the controller lowers the gain of the first variable gain block, the controller raises the gain of the second variable gain block.
    Type: Application
    Filed: January 6, 2014
    Publication date: August 21, 2014
    Applicant: PANASONIC CORPORATION
    Inventors: Kazuhisa KOTEGAWA, Fumiyasu KONNO, Katsu TAKEDA
  • Patent number: 8155328
    Abstract: An sound reproducing apparatus is configured such that a correction amount is calculated on the basis of a masking model, determiner for determining a correction parameter correcting input signal so as to be natural for human ears to hear on the basis of the calculated correction amount is provided, and a characteristic of correction filter is changed on the basis of a result of determiner when inputting vehicle speed information.
    Type: Grant
    Filed: April 19, 2007
    Date of Patent: April 10, 2012
    Assignee: Panasonic Corporation
    Inventors: Kazuhisa Kotegawa, Fumiyasu Konno, Shinnosuke Nagasawa, Masahide Onishi
  • Patent number: 8139798
    Abstract: A sound reproducing apparatus is provided with a circuit comprising a first secondary phase shifter in a front stage of at least one of channels among a first power amplifier, a second power amplifier and a third power amplifier, and a second secondary phase shifter and an adder in at least one of remaining channels for providing an output by adding output signals of a music signal source and the second secondary phase shifter. The apparatus of this structure eliminates phase interferences between a center speaker and right and left speakers by controlling sound waves generated by the center speaker, thereby achieving excellent reproduction of music.
    Type: Grant
    Filed: January 29, 2007
    Date of Patent: March 20, 2012
    Assignee: Panasonic Corporation
    Inventors: Kazuhisa Kotegawa, Fumiyasu Konno, Shinnosuke Nagasawa
  • Patent number: 8116488
    Abstract: The sound reproducing apparatus for use with a signal source comprises, a first output unit connected to the signal source via a first power amplifier, a first phase shifter connected to the signal source, a second output unit connected to the first phase shifter via a second power amplifier, a second phase shifter connected to the signal source, a third output unit connected to the second phase shifter via a third power amplifier, a fourth phase shifter connected to a third phase shifter, and a fourth output unit connected to the fourth phase shifter via a fourth power amplifier, wherein the first output unit and the second output unit are in right and left relation with each other, the third output unit and the fourth output unit are in right and left relation with each other, a group of the first output unit and the second output unit and a group of the third output unit and the fourth output unit are in front and rear relation with each other. The vehicle is equipped with the sound reproducing apparatus.
    Type: Grant
    Filed: April 6, 2006
    Date of Patent: February 14, 2012
    Assignee: Panasonic Corporation
    Inventors: Shinnosuke Nagasawa, Kazuhisa Kotegawa, Fumiyasu Konno
  • Publication number: 20090225995
    Abstract: An sound reproducing apparatus is configured such that a correction amount is calculated on the basis of a masking model, determiner for determining a correction parameter correcting input signal so as to be natural for human ears to hear on the basis of the calculated correction amount is provided, and a characteristic of correction filter is changed on the basis of a result of determiner when inputting vehicle speed information.
    Type: Application
    Filed: April 19, 2007
    Publication date: September 10, 2009
    Inventors: Kazuhisa Kotegawa, Fumiyasu Konno, Shinnosuke Nagasawa, Masahide Onishi
  • Publication number: 20090074212
    Abstract: The sound reproducing apparatus for use with a signal source comprises, a first output unit connected to the signal source via a first power amplifier, a first phase shifter connected to the signal source, a second output unit connected to the first phase shifter via a second power amplifier, a second phase shifter connected to the signal source, a third output unit connected to the second phase shifter via a third power amplifier, a fourth phase shifter connected to a third phase shifter, and a fourth output unit connected to the fourth phase shifter via a fourth power amplifier, wherein the first output unit and the second output unit are in right and left relation with each other, the third output unit and the fourth output unit are in right and left relation with each other, a group of the first output unit and the second output unit and a group of the third output unit and the fourth output unit are in front and rear relation with each other. The vehicle is equipped with the sound reproducing apparatus.
    Type: Application
    Filed: April 6, 2006
    Publication date: March 19, 2009
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventors: Shinnosuke Nagasawa, Kazuhisa Kotegawa, Fumiyasu Konno
  • Publication number: 20090052693
    Abstract: A sound reproducing apparatus is structured to use a first dividing circuit and a determining circuit to analyze a frequency characteristic of an inputted signal and to output a signal adjusted by a first adjusting circuit to have a prescribed frequency characteristic by a switching by a switch circuit. Thus, when signals having different frequency characteristics are inputted, frequency characteristics of the input signals can be automatically adjusted without using an external signal and channels having different frequency characteristics can be reproduced by a single system to provide good speaker-reproduced sound.
    Type: Application
    Filed: June 8, 2006
    Publication date: February 26, 2009
    Applicant: PANASONIC CORPORATION
    Inventors: Kazuhisa Kotegawa, Shinnosuke Nagasawa
  • Publication number: 20070189552
    Abstract: A sound reproducing apparatus is provided with a circuit comprising a first secondary phase shifter in a front stage of at least one of channels among a first power amplifier, a second power amplifier and a third power amplifier, and a second secondary phase shifter and an adder in at least one of remaining channels for providing an output by adding output signals of a music signal source and the second secondary phase shifter. The apparatus of this structure eliminates phase interferences between a center speaker and right and left speakers by controlling sound waves generated by the center speaker, thereby achieving excellent reproduction of music.
    Type: Application
    Filed: January 29, 2007
    Publication date: August 16, 2007
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventors: Kazuhisa KOTEGAWA, Fumiyasu KONNO, Shinnosuke NAGASAWA