Patents by Inventor Ryoji Miyahara
Ryoji Miyahara 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).
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Patent number: 11972750Abstract: There is provided a voice output apparatus for providing a high-quality sound to an eardrum of a user. The voice output apparatus includes a first voice output unit outputting a voice to an ear canal of a user based on an output voice signal, a first noise acquirer arranged to face outward from a body of the user and captures a mixed voice including first external noise arriving from an outside of the user to output a mixed voice signal, an echo canceler cancelling an influence, on the first external noise, of a leaked voice output from the first voice output unit and leaking to the outside of the user, and a noise canceler generating a first external noise signal corresponding to the first external noise, and processing, using the first external noise signal, an input voice signal input from the outside to generate the output voice signal.Type: GrantFiled: March 26, 2020Date of Patent: April 30, 2024Assignees: NEC CORPORATION, NEC Platforms, Ltd.Inventors: Kouji Oosugi, Ryoji Miyahara
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VOICE INPUT/OUTPUT APPARATUS, HEARING AID, VOICE INPUT/OUTPUT METHOD, AND VOICE INPUT/OUTPUT PROGRAM
Publication number: 20230353953Abstract: By performing both noise cancellation and echo cancellation, a high-quality main voice signal is generated. A voice input/output apparatus includes a noise acquirer that is arranged toward an outside of a body of a user and acquires external noise arriving from the outside of the user, a voice output unit that accepts an input of a voice signal and outputs a voice to an ear canal of the user, a main voice acquirer that acquires a mixed voice, in which the external noise, the output voice, and a main voice of the user transmitted from a vocal cord of the user through the ear canal are mixed, and outputs a mixed voice signal, a noise canceler that processes the mixed voice signal using a noise signal based on the external noise, and an echo canceler that processes the mixed voice signal using the voice signal.Type: ApplicationFiled: July 11, 2023Publication date: November 2, 2023Applicant: NEC CORPORATIONInventors: Kouji OOSUGI, Takayuki ARAKAWA, Akihiko SUGIYAMA, Ryoji MIYAHARA -
Patent number: 11769517Abstract: This invention provides a signal processing apparatus capable of obtaining an output signal of sufficiently high quality if the phase of an input signal is largely different from the phase of a true voice. The signal processing apparatus includes a voice detector that receives a mixed signal including a voice and a signal other than the voice and obtains existence of the voice as a voice flag, a corrector that receives the mixed signal and the voice flag and obtains a corrected mixed signal generated by correcting the mixed signal in accordance with a state of the voice flag, and a shaper that receives the corrected mixed signal and shapes the corrected mixed signal.Type: GrantFiled: August 24, 2018Date of Patent: September 26, 2023Assignees: NEC CORPORATION, NEC Platforms, Ltd.Inventors: Akihiko Sugiyama, Ryoji Miyahara
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Voice input/output apparatus, hearing aid, voice input/output method, and voice input/output program
Patent number: 11743662Abstract: By performing both noise cancellation and echo cancellation, a high-quality main voice signal is generated. A voice input/output apparatus includes a noise acquirer that is arranged toward an outside of a body of a user and acquires external noise arriving from the outside of the user, a voice output unit that accepts an input of a voice signal and outputs a voice to an ear canal of the user, a main voice acquirer that acquires a mixed voice, in which the external noise, the output voice, and a main voice of the user transmitted from a vocal cord of the user through the ear canal are mixed, and outputs a mixed voice signal, a noise canceler that processes the mixed voice signal using a noise signal based on the external noise, and an echo canceler that processes the mixed voice signal using the voice signal.Type: GrantFiled: December 16, 2019Date of Patent: August 29, 2023Assignees: NEC CORPORATION, NEC Platforms, Ltd.Inventors: Kouji Oosugi, Takayuki Arakawa, Akihiko Sugiyama, Ryoji Miyahara -
Publication number: 20220189448Abstract: There is provided a voice output apparatus for providing a high-quality sound to an eardrum of a user. The voice output apparatus includes a first voice output unit outputting a voice to an ear canal of a user based on an output voice signal, a first noise acquirer arranged to face outward from a body of the user and captures a mixed voice including first external noise arriving from an outside of the user to output a mixed voice signal, an echo canceler cancelling an influence, on the first external noise, of a leaked voice output from the first voice output unit and leaking to the outside of the user, and a noise canceler generating a first external noise signal corresponding to the first external noise, and processing, using the first external noise signal, an input voice signal input from the outside to generate the output voice signal.Type: ApplicationFiled: March 26, 2020Publication date: June 16, 2022Applicants: NEC Corporation, NEC Platforms, Lid.Inventors: Kouji OOSUGI, Ryoji MIYAHARA
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VOICE INPUT/OUTPUT APPARATUS, HEARING AID, VOICE INPUT/OUTPUT METHOD, AND VOICE INPUT/OUTPUT PROGRAM
Publication number: 20210392445Abstract: By performing both noise cancellation and echo cancellation, a high-quality main voice signal is generated. A voice input/output apparatus includes a noise acquirer that is arranged toward an outside of a body of a user and acquires external noise arriving from the outside of the user, a voice output unit that accepts an input of a voice signal and outputs a voice to an ear canal of the user, a main voice acquirer that acquires a mixed voice, in which the external noise, the output voice, and a main voice of the user transmitted from a vocal cord of the user through the ear canal are mixed, and outputs a mixed voice signal, a noise canceler that processes the mixed voice signal using a noise signal based on the external noise, and an echo canceler that processes the mixed voice signal using the voice signal.Type: ApplicationFiled: December 16, 2019Publication date: December 16, 2021Applicants: NEC Corporation, NEC Platforms, Ltd.Inventors: Kouji OOSUGI, Takayuki ARAKAWA, Akihiko SUGIYAMA, Ryoji MIYAHARA -
Publication number: 20210335379Abstract: This invention provides a signal processing apparatus capable of obtaining an output signal of sufficiently high quality if the phase of an input signal is largely different from the phase of a true voice. The signal processing apparatus includes a voice detector that receives a mixed signal including a voice and a signal other than the voice and obtains existence of the voice as a voice flag, a corrector that receives the mixed signal and the voice flag and obtains a corrected mixed signal generated by correcting the mixed signal in accordance with a state of the voice flag, and a shaper that receives the corrected mixed signal and shapes the corrected mixed signal.Type: ApplicationFiled: August 24, 2018Publication date: October 28, 2021Applicants: NEC corporation, NEC p|atforms, Ltd.Inventors: Akihiko SUGIYAMA, Ryoji MIYAHARA
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Patent number: 11043228Abstract: There is provided a signal processing apparatus that obtains a speech signal with sufficiently reduced wind noise.Type: GrantFiled: April 14, 2016Date of Patent: June 22, 2021Assignee: NEC CORPORATIONInventors: Osamu Hoshuyama, Ryoji Miyahara, Akihiko Sugiyama
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Publication number: 20210174820Abstract: This invention provides a signal processing apparatus for receiving a mixed signal including at least one target signal and outputting a desired composite signal. The signal processing apparatus includes a storage unit that stores an acoustic signal, and a signal processor that receives a mixed signal including at least one target signal, and composites the acoustic signal stored in a storage unit with the at least one target signal.Type: ApplicationFiled: August 24, 2018Publication date: June 10, 2021Applicants: NEC Corporation, NEC p|atforms, Ltd.Inventors: Akihiko SUGIYAMA, Ryoji MIYAHARA
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Patent number: 10825465Abstract: There is provided a signal processing apparatus for amplifying or attenuating, with respect to a signal in which a desired signal and another signal are mixed, the desired signal and the other signal at different ratios. The signal processing apparatus includes a separator that obtains an estimated first signal and an estimated second signal by receiving a mixed signal in which a first signal (for example, speech) and a second signal (for example, noise) are mixed and estimating the first signal and the second signal. Furthermore, the signal processing apparatus includes a gain adjuster that obtains a gain-adjusted mixed signal by receiving the estimated first signal and the estimated second signal.Type: GrantFiled: December 20, 2016Date of Patent: November 3, 2020Assignees: NEC CORPORATION, NEC Platforms, Ltd.Inventors: Akihiko Sugiyama, Ryoji Miyahara
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Patent number: 10746838Abstract: A wideband signal is enhanced or suppressed to the same extent at each frequency without increasing the size of an overall sensor array. To achieve this, there is provided a signal processing apparatus including a direction estimator that obtains a direction of arrival of a signal for signals received from a plurality of sensors and each containing a target signal and noise, a first gain calculator that calculates a first gain using the direction of arrival of the signal, an integrator that obtains an integrated signal by integrating the signals received from the plurality of sensors, and a multiplier that multiplies the first gain by the integrated signal.Type: GrantFiled: November 6, 2015Date of Patent: August 18, 2020Assignee: NEC CORPORATIONInventors: Akihiko Sugiyama, Ryoji Miyahara
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Publication number: 20190219659Abstract: A wideband signal is enhanced or suppressed to the same extent at each frequency without increasing the size of an overall sensor array. To achieve this, there is provided a signal processing apparatus including a direction estimator that obtains a direction of arrival of a signal for signals received from a plurality of sensors and each containing a target signal and noise, a first gain calculator that calculates a first gain using the direction of arrival of the signal, an integrator that obtains an integrated signal by integrating the signals received from the plurality of sensors, and a multiplier that multiplies the first gain by the integrated signal.Type: ApplicationFiled: March 26, 2019Publication date: July 18, 2019Applicants: NEC Corporation, NEC PLATFORMS, LTD.Inventors: Akihiko SUGIYAMA, Ryoji MIYAHARA
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Patent number: 10276178Abstract: A signal processing apparatus for effectively detecting an abrupt change in a signal, in particular, an abrupt change different from an ideal pulse includes a converter that converts an input signal into a phase component signal in a frequency domain, a first calculator that calculates a phase gradient for each of a plurality of frequencies of the phase component signal as a first phase gradient, a weighting unit that weights the first phase gradient with an amplitude or a power of the input signal, thereby calculating a weighted first phase gradient, a second calculator that calculates a second phase gradient based on the weighted first phase gradient, and a determiner that determines presence of an abrupt change in the input signal based on the first phase gradient and the second phase gradient.Type: GrantFiled: June 16, 2014Date of Patent: April 30, 2019Assignee: NEC CorporationInventors: Akihiko Sugiyama, Ryoji Miyahara
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Publication number: 20190027159Abstract: There is provided a signal processing apparatus for amplifying or attenuating, with respect to a signal in which a desired signal and another signal are mixed, the desired signal and the other signal at different ratios. The signal processing apparatus includes a separator that obtains an estimated first signal and an estimated second signal by receiving a mixed signal in which a first signal (for example, speech) and a second signal (for example, noise) are mixed and estimating the first signal and the second signal. Furthermore, the signal processing apparatus includes a gain adjuster that obtains a gain-adjusted mixed signal by receiving the estimated first signal and the estimated second signal.Type: ApplicationFiled: December 20, 2016Publication date: January 24, 2019Applicants: NEC CORPORATION, NEC Platforms, Ltd.Inventors: Akihiko SUGIYAMA, Ryoji MIYAHARA
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Publication number: 20180090153Abstract: There is provided a signal processing apparatus that obtains a speech signal with sufficiently reduced wind noise.Type: ApplicationFiled: April 14, 2016Publication date: March 29, 2018Applicants: NEC Corporation, NEC Platforms, Ltd.Inventors: Osamu HOSHUYAMA, Ryoji MIYAHARA, Akihiko SUGIYAMA
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Patent number: 9905247Abstract: There is proposed a signal processing apparatus for enhancing a target signal and suppressing the remaining components without increasing an array size or the number of sensors. This signal processing apparatus includes a first array processor that generates a first array processing signal by enhancing a predetermined signal among signals received from a plurality of sensors, and a decorrelator that generates a decorrelated signal by removing, from the first array processing signal, a signal component correlated with a signal received from an auxiliary sensor different from the plurality of sensors.Type: GrantFiled: August 7, 2014Date of Patent: February 27, 2018Assignee: NEC CORPORATIONInventors: Akihiko Sugiyama, Ryoji Miyahara
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Patent number: 9858946Abstract: Disclosed is a signal processing apparatus that processes an input signal to accurately detect an abrupt change in the input signal in accordance with the degree of linear change of a phase component in a frequency domain. The signal processing apparatus includes a converter that converts the input signal into the phase component and an amplitude component in the frequency domain, a linearity calculator that calculates the linearity of the phase component in the frequency domain, and a determiner that determines presence of the abrupt change in the input signal based on the linearity calculated by the linearity calculator.Type: GrantFiled: February 26, 2014Date of Patent: January 2, 2018Assignees: NEC Corporation, Renesas Electronics CorporationInventors: Akihiko Sugiyama, Kwangsoo Park, Ryoji Miyahara
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Publication number: 20170307721Abstract: A wideband signal is enhanced or suppressed to the same extent at each frequency without increasing the size of an overall sensor array. To achieve this, there is provided a signal processing apparatus including a direction estimator that obtains a direction of arrival of a signal for signals received from a plurality of sensors and each containing a target signal and noise, a first gain calculator that calculates a first gain using the direction of arrival of the signal, an integrator that obtains an integrated signal by integrating the signals received from the plurality of sensors, and a multiplier that multiplies the first gain by the integrated signal.Type: ApplicationFiled: November 6, 2015Publication date: October 26, 2017Applicants: NEC Corporation, NEC Engineering, Ltd.Inventors: Akihiko SUGIYAMA, Ryoji MIYAHARA
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Patent number: 9715885Abstract: This invention provides a signal processing apparatus for effectively detecting an abrupt change in an input signal. The signal processing apparatus includes a converter that converts an input signal into a phase component signal and an amplitude component signal in a frequency domain. The signal processing apparatus further includes a calculator that calculates feature amounts of the phase component signal and the amplitude component signal derived by the converter. The signal processing apparatus further includes a determiner that determines presence probability of an abrupt change in the input signal based on the feature amounts calculated by the calculator.Type: GrantFiled: February 26, 2014Date of Patent: July 25, 2017Assignee: NEC CorporationInventors: Akihiko Sugiyama, Ryoji Miyahara
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Patent number: 9531344Abstract: To obtain a high-quality enhanced signal, disclosed is a signal processing apparatus including a transform unit that transforms a mixed signal in which a first signal and a second signal coexist, into a phase component and a magnitude component or power component for each frequency, a first control unit that replaces the phase component of a predetermined frequency, a second control unit that modifies the magnitude component or power component of the predetermined frequency in accordance with the amount of a change of the magnitude component or power component that arises from replacement by the first control unit, and a reconstruction unit that reconstructs the phase component replaced by the first control unit and the magnitude component or power component modified by the second control unit.Type: GrantFiled: December 19, 2011Date of Patent: December 27, 2016Assignee: NEC CORPORATIONInventors: Akihiko Sugiyama, Ryoji Miyahara