Patents by Inventor Yoshihisa Nakatoh

Yoshihisa Nakatoh 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: 8565456
    Abstract: A hearing aid, that outputs a microphone input signal and an external input signal, improved includes a directional microphone, an external input terminal, a hearing aid processor that inputs sound signals from the microphone and the external input terminal, and a receiver that outputs sound signal that have undergone hearing aid processing by the hearing aid processor. The hearing aid processor has a mixer that mixes a sound signal from the microphone with a sound signal from the external input terminal and outputs a sound signal to the receiver, a mixing ratio decider that decides a mixing ratio between the sound signal from the microphone and a sound signal from the external input terminal, a front sound detector that is connected to the mixing ratio decider, and a similarity calculator that determines whether or not sound collected by the directional microphone is that of an external device.
    Type: Grant
    Filed: November 2, 2011
    Date of Patent: October 22, 2013
    Assignee: Panasonic Corporation
    Inventors: Makoto Nishizaki, Yoshihisa Nakatoh
  • Patent number: 8542856
    Abstract: In a hearing aid (100), a control device (4) comprises a transmission characteristic calculator (18), a correction characteristic calculator (21), and a correction component (17). The transmission characteristic calculator (18) calculates an at-fitting transmission characteristic Gf (?) on the basis of correction-use sound data and first sound data produced by collection at an ear canal microphone (10) of correction-use sound outputted from a receiver (3) during fitting. The transmission characteristic calculator (18) calculates an in-usage transmission characteristic Gu (?) on the basis of correction-use sound data and third sound data produced by collection at the ear canal microphone (10) of correction-use sound outputted from the receiver (3) according to user operation after fitting. The correction characteristic calculator (21) calculates a correction characteristic H (?) on the basis of the at-fitting transmission characteristic Gf (?) and the in-usage transmission characteristic Gu (?).
    Type: Grant
    Filed: December 1, 2010
    Date of Patent: September 24, 2013
    Assignee: Panasonic Corporation
    Inventors: Yoshihisa Nakatoh, Makoto Nishizaki
  • Patent number: 8525654
    Abstract: A vehicle-in-blind-spot detecting apparatus detects a vehicle positioned in a blind spot by mounting the apparatus on an operator's vehicle. The vehicle-in-blind-spot includes a presenting unit which presents information; at least one microphone which detects a sound; a vehicle sound extracting unit which extracts a vehicle sound from the sound detected by the microphone; and a sound source direction detecting unit which detects a sound source direction of the vehicle sound extracted by the vehicle sound extracting unit. A vehicle-in-blind-spot determining unit causes the presenting unit to present the information indicating that a vehicle is found in a blind spot in the case where the sound source direction of the vehicle sound detected by the sound source direction detecting unit is a first direction representing above the vehicle-in-blind-spot detecting apparatus with respect to a ground.
    Type: Grant
    Filed: May 5, 2010
    Date of Patent: September 3, 2013
    Assignee: Panasonic Corporation
    Inventors: Shinichi Yoshizawa, Yoshihisa Nakatoh
  • Patent number: 8352274
    Abstract: A sound determination device (100) includes: an FFT unit (2402) which receives a mixed sound including a to-be-extracted sound and a noise, and obtains a frequency signal of the mixed sound for each of a plurality of times included in a predetermined duration; and a to-be-extracted sound determination unit (101 (j)) which determines, when the number of the frequency signals at the plurality of times included in the predetermined duration is equal to or larger than a first threshold value and a phase distance between the frequency signals out of the frequency signals at the plurality of times is equal to or smaller than a second threshold value, each of the frequency signals with the phase distance as a frequency signal of the to-be-extracted sound. The phase distance is a distance between phases of the frequency signals when a phase of a frequency signal at a time t is ?(t) (radian) and the phase is represented by ??(t)=mod 2?(?(t)?2?ft) (where f is an analysis-target frequency).
    Type: Grant
    Filed: August 25, 2008
    Date of Patent: January 8, 2013
    Assignee: Panasonic Corporation
    Inventors: Shinichi Yoshizawa, Yoshihisa Nakatoh
  • Patent number: 8223978
    Abstract: A target sound analysis apparatus capable of distinguishing between a sound having the same fundamental period as a target sound but which differs therefrom and the target sound and analyzing whether or not the target sound is contained in an evaluation sound is an target sound analysis apparatus that analyzes whether or not a target sound is included in an evaluation sound, and includes: a target sound preparation unit that prepares a target sound that is an analysis waveform to be used for analyzing a fundamental period; an evaluation sound preparation unit that prepares an evaluation sound that is an analyzed waveform in which its fundamental period will be analyzed; and an analysis unit that temporally shifts the target sound with respect to the evaluation sound to sequentially calculate differential values of the evaluation sound and the target sound at corresponding points in time, calculate an iterative interval between the points in time where the differential value is equal to or lower than a predete
    Type: Grant
    Filed: September 25, 2007
    Date of Patent: July 17, 2012
    Assignee: Panasonic Corporation
    Inventors: Shinichi Yoshizawa, Yoshihisa Nakatoh, Tetsu Suzuki
  • Patent number: 8204747
    Abstract: An emotion recognition apparatus performs accurate and stable speech-based emotion recognition, irrespective of individual, regional, and language differences of prosodic information.
    Type: Grant
    Filed: May 21, 2007
    Date of Patent: June 19, 2012
    Assignee: Panasonic Corporation
    Inventors: Yumiko Kato, Takahiro Kamai, Yoshihisa Nakatoh, Yoshifumi Hirose
  • Patent number: 8184827
    Abstract: Provided is a sound source localization device which can detect a source location of an extraction sound, including at least two microphones; an analysis unit (103) which (i) analyze frequencies of the mixed sound including the noise and received by each microphone, and (ii) generates frequency signals; and an extraction unit (105) which, for each source location candidate, (a) adjusts time axes of the frequency signals corresponding to the microphones, so that there is no time difference between when the mixed sound reaches one microphone from the source location candidate and when the mixed sound reaches another microphone from the source location candidate, and (b) determines frequency signals having a difference distance equal to or smaller than a threshold value, from among the frequency signals corresponding to the microphones with the time axis having been adjusted, the difference distance representing a degree of a difference in the frequency signals between the microphones, and (c) extracts the sourc
    Type: Grant
    Filed: November 6, 2007
    Date of Patent: May 22, 2012
    Assignee: Panasonic Corporation
    Inventors: Shinichi Yoshizawa, Yoshihisa Nakatoh
  • Publication number: 20120114155
    Abstract: A hearing aid, that outputs a microphone input signal and an external input signal, improved includes a directional microphone, an external input terminal, a hearing aid processor that inputs sound signals from the microphone and the external input terminal, and a receiver that outputs sound signal that have undergone hearing aid processing by the hearing aid processor. The hearing aid processor has a mixer that mixes a sound signal from the microphone with a sound signal from the external input terminal and outputs a sound signal to the receiver, a mixing ratio decider that decides a mixing ratio between the sound signal from the microphone and a sound signal from the external input terminal, a front sound detector that is connected to the mixing ratio decider, and a similarity calculator that determines whether or not sound collected by the directional microphone is that of an external device.
    Type: Application
    Filed: November 2, 2011
    Publication date: May 10, 2012
    Inventors: Makoto NISHIZAKI, Yoshihisa Nakatoh
  • Patent number: 8170247
    Abstract: This hearing aid comprises a microphone (101) and an external input terminal (102), a hearing aid processor (150) to which audio signals from the microphone (101) and the external input terminal (102) are inputted, and a receiver (113) to which audio signals that have undergone hearing aid processing by this hearing aid processor (150) are outputted. The hearing aid processor (150) has a mixer (112) that mixes audio signals from the microphone (101) with audio signals from the external input terminal (102) and outputs these audio signals to the receiver (113), a mix ratio determination unit (111) for determining the mix ratio between audio signals from the microphone (101) and audio signals from the external input terminal (102) in this mixer (112), and a facial movement detector (110) that is connected to this mix ratio determination unit (111).
    Type: Grant
    Filed: June 11, 2010
    Date of Patent: May 1, 2012
    Assignee: Panasonic Corporation
    Inventors: Makoto Nishizaki, Yoshihisa Nakatoh
  • Patent number: 8155346
    Abstract: A sound source direction detector comprises FFT analysis sections (103(1) to 103(3)) for generating a frequency spectrum in at least one frequency band of acoustic signals for each of the acoustic signals collected by two or more microphones arranged apart from one another, detection sound identifying sections (104(1) to 104(3)) for identifying a time portion of the frequency spectrum of a detection sound which obtains a sound source direction from the frequency spectrum in the frequency band, and a direction detecting section (105) for obtaining the difference between the times at which the detection sound reaches the microphones, obtaining the sound source direction from the time difference, the distance between the microphones, and the sound velocity, and outputting it depending on the degree of coincidence between the microphones of the frequency spectrum in the time portion identified by the detection sound identifying sections (104(1) to 104(3)) in a time interval which is the time unit to detect the so
    Type: Grant
    Filed: September 10, 2008
    Date of Patent: April 10, 2012
    Assignee: Panasonic Corpration
    Inventors: Shinichi Yoshizawa, Yoshihisa Nakatoh
  • Publication number: 20120020506
    Abstract: In a hearing aid (100), a control device (4) comprises a transmission characteristic calculator (18), a correction characteristic calculator (21), and a correction component (17). The transmission characteristic calculator (18) calculates an at-fitting transmission characteristic Gf (?) on the basis of correction-use sound data and first sound data produced by collection at an ear canal microphone (10) of correction-use sound outputted from a receiver (3) during fitting. The transmission characteristic calculator (18) calculates an in-usage transmission characteristic Gu (?) on the basis of correction-use sound data and third sound data produced by collection at the ear canal microphone (10) of correction-use sound outputted from the receiver (3) according to user operation after fitting. The correction characteristic calculator (21) calculates a correction characteristic H (?) on the basis of the at-fitting transmission characteristic Gf (?) and the in-usage transmission characteristic Gu (?).
    Type: Application
    Filed: December 1, 2010
    Publication date: January 26, 2012
    Applicant: PANASONIC CORPORATION
    Inventors: Yoshihisa Nakatoh, Makoto Nishizaki
  • Patent number: 7974420
    Abstract: A mixed audio separation system (100) which separates a specific audio from among a mixed audio (S100) includes a local frequency information generation unit (105) which obtains pieces of local frequency information (S103) corresponding to local reference waveforms (S102), based on the local reference waveforms (S102) and an analysis waveform which is the waveform of the mixed audio (S100). Each of the local reference waveforms (S102) (i) constitutes a part of a reference waveform for analyzing a predetermined frequency, (ii) has a predetermined temporal/spatial resolution and (iii) includes at least one of an amplification spectrum and a phase spectrum in the predetermined frequency.
    Type: Grant
    Filed: April 11, 2006
    Date of Patent: July 5, 2011
    Assignee: Panasonic Corporation
    Inventors: Shinichi Yoshizawa, Tetsu Suzuki, Yoshihisa Nakatoh
  • Publication number: 20110091056
    Abstract: This hearing aid comprises a microphone (101) and an external input terminal (102), a hearing aid processor (150) to which audio signals from the microphone (101) and the external input terminal (102) are inputted, and a receiver (113) to which audio signals that have undergone hearing aid processing by this hearing aid processor (150) are outputted. The hearing aid processor (150) has a mixer (112) that mixes audio signals from the microphone (101) with audio signals from the external input terminal (102) and outputs these audio signals to the receiver (113), a mix ratio determination unit (111) for determining the mix ratio between audio signals from the microphone (101) and audio signals from the external input terminal (102) in this mixer (112), and a facial movement detector (110) that is connected to this mix ratio determination unit (111).
    Type: Application
    Filed: June 11, 2010
    Publication date: April 21, 2011
    Inventors: Makoto Nishizaki, Yoshihisa Nakatoh
  • Publication number: 20100303254
    Abstract: A sound source direction detector comprises FFT analysis sections (103(1) to 103(3)) for generating a frequency spectrum in at least one frequency band of acoustic signals for each of the acoustic signals collected by two or more microphones arranged apart from one another, detection sound identifying sections (104(1) to 104(3)) for identifying a time portion of the frequency spectrum of a detection sound which obtains a sound source direction from the frequency spectrum in the frequency band, and a direction detecting section (105) for obtaining the difference between the times at which the detection sound reaches the microphones, obtaining the sound source direction from the time difference, the distance between the microphones, and the sound velocity, and outputting it depending on the degree of coincidence between the microphones of the frequency spectrum in the time portion identified by the detection sound identifying sections (104(1) to 104(3)) in a time interval which is the time unit to detect the so
    Type: Application
    Filed: September 10, 2008
    Publication date: December 2, 2010
    Inventors: Shinichi Yoshizawa, Yoshihisa Nakatoh
  • Publication number: 20100214086
    Abstract: Provided is a vehicle-in-blind-spot detecting apparatus which can detect a vehicle positioned in a blind spot by simply mounting the apparatus on an operator's vehicle. The vehicle-in-blind-spot includes: a presenting unit which presents information; at least one microphone which detects a sound a vehicle sound extracting unit which extracts a vehicle sound from the sound detected by the microphone; a sound source direction detecting unit which detects a sound source direction of the vehicle sound extracted by the vehicle sound extracting unit; and a vehicle-in-blind-spot determining unit which causes the presenting unit to present the information indicating that a vehicle is found in a blind spot in the case where the sound source direction of the vehicle sound detected by the sound source direction detecting unit is a first direction representing above the vehicle-in-blind-spot detecting apparatus with respect to a ground.
    Type: Application
    Filed: May 5, 2010
    Publication date: August 26, 2010
    Inventors: Shinichi YOSHIZAWA, Yoshihisa Nakatoh
  • Publication number: 20100215191
    Abstract: A noise removal device includes: an FFT analysis unit which receives a mixed sound including to-be-extracted sounds and noises, and determines frequency signals at time points in a time width; and a to-be-extracted sound determination unit which determines, for each to-be-extracted sound, frequency signals at the time points, satisfying conditions of (i) being equal to or greater than a first threshold value in number and (ii) having a phase distance between the frequency signals that is equal to or smaller than a second threshold value, wherein the phase distance is a distance between phases ??(t) of the condition-satisfying frequency signals when a phase of a frequency signal at a current time point t is ?(t) (radian) and the phase ??(t) is mod 2?(?(t)?2?ft), f denoting a reference frequency, and the predetermined time width is within 2 to 4 times the time window widths of the window functions.
    Type: Application
    Filed: May 4, 2010
    Publication date: August 26, 2010
    Inventors: Shinichi YOSHIZAWA, Yoshihisa Nakatoh
  • Publication number: 20100208902
    Abstract: The noise removal device includes plural microphones, a time axis adjustment unit, an FFT analysis unit, and a noise removal processing unit, and determines frequency signals of a to-be-extracted sound by performing a threshold judgment on each of the phase distances, of the mixed sounds each received through a corresponding one of the microphones, in the case where the phases are expressed by the expression ??(t)=mod 2?(?(t)?2?ft) (f denotes a reference frequency).
    Type: Application
    Filed: April 30, 2010
    Publication date: August 19, 2010
    Inventors: Shinichi Yoshizawa, Yoshihisa Nakatoh
  • Patent number: 7711560
    Abstract: A speech recognition apparatus equipped with the garbage acoustic model storage unit storing the garbage acoustic model which learned the collection of unnecessary words. A feature value calculation unit calculates the feature parameter necessary for recognition by acoustically analyzing the unidentified input speech including the non-language speech per frame which is a unit for speech analysis. A garbage acoustic score calculation unit calculates the garbage acoustic score by comparing the feature parameter and the garbage acoustic model, and a garbage acoustic score correction unit corrects the garbage acoustic score calculated by the garbage acoustic score calculation unit so as to raise it in the frame where the non-language speech is inputted.
    Type: Grant
    Filed: February 4, 2004
    Date of Patent: May 4, 2010
    Assignee: Panasonic Corporation
    Inventors: Maki Yamada, Makoto Nishizaki, Yoshihisa Nakatoh, Shinichi Yoshizawa
  • Publication number: 20100030562
    Abstract: A sound determination device (100) includes: an FFT unit (2402) which receives a mixed sound including a to-be-extracted sound and a noise, and obtains a frequency signal of the mixed sound for each of a plurality of times included in a predetermined duration; and a to-be-extracted sound determination unit (101 (j)) which determines, when the number of the frequency signals at the plurality of times included in the predetermined duration is equal to or larger than a first threshold value and a phase distance between the frequency signals out of the frequency signals at the plurality of times is equal to or smaller than a second threshold value, each of the frequency signals with the phase distance as a frequency signal of the to-be-extracted sound. The phase distance is a distance between phases of the frequency signals when a phase of a frequency signal at a time t is ?(t) (radian) and the phase is represented by ??(t)=mod 2?(?(t)?2?ft) (where f is an analysis-target frequency).
    Type: Application
    Filed: August 25, 2008
    Publication date: February 4, 2010
    Inventors: Shinichi Yoshizawa, Yoshihisa Nakatoh
  • Publication number: 20090313019
    Abstract: An emotion recognition apparatus is capable of performing accurate and stable speech-based emotion recognition, irrespective of individual, regional, and language differences of prosodic information.
    Type: Application
    Filed: May 21, 2007
    Publication date: December 17, 2009
    Inventors: Yumiko Kato, Takahiro Kamai, Yoshihisa Nakatoh, Yoshifumi Hirose