Yoshihisa Nakatoh
Yoshihisa Nakatoh, Kanagawa JP
Patent application number | Description | Published |
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20090067647 | Mixed audio separation apparatus - A mixed audio separation system ( | 03-12-2009 |
20100030562 | SOUND DETERMINATION DEVICE, SOUND DETECTION DEVICE, AND SOUND DETERMINATION METHOD - A sound determination device ( | 02-04-2010 |
20100208902 | SOUND DETERMINATION DEVICE, SOUND DETERMINATION METHOD, AND SOUND DETERMINATION PROGRAM - 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 ψ′(t)=mod | 08-19-2010 |
20100214086 | VEHICLE-IN-BLIND-SPOT DETECTING APPARATUS AND METHOD THEREOF - 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. | 08-26-2010 |
20100215191 | SOUND DETERMINATION DEVICE, SOUND DETECTION DEVICE, AND SOUND DETERMINATION METHOD - 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 ψ′(t) of the condition-satisfying frequency signals when a phase of a frequency signal at a current time point t is ψ(t) (radian) and the phase ψ′(t) is mod 2π(ψ(t)−2πft), f denoting a reference frequency, and the predetermined time width is within 2 to 4 times the time window widths of the window functions. | 08-26-2010 |
20110091056 | HEARING AID - This hearing aid comprises a microphone ( | 04-21-2011 |
20120020506 | HEARING AID - In a hearing aid ( | 01-26-2012 |
Yoshihisa Nakatoh, Kyoto JP
Patent application number | Description | Published |
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20090285409 | SOUND SOURCE LOCALIZATION DEVICE - 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 ( | 11-19-2009 |
20090313019 | EMOTION RECOGNITION APPARATUS - 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. The emotion recognition apparatus is an apparatus for recognizing an emotion of a speaker from an input speech, and includes: a speech recognition unit ( | 12-17-2009 |
20100303254 | AUDIO SOURCE DIRECTION DETECTING DEVICE - A sound source direction detector comprises FFT analysis sections ( | 12-02-2010 |
Yoshihisa Nakatoh, Nara JP
Patent application number | Description | Published |
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20080304672 | Target sound analysis apparatus, target sound analysis method and target sound analysis program - 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 predetermined threshold value, and judge whether or not the target sound exists in the evaluation sound based on a period of the iterative interval and the fundamental period of the target sound. | 12-11-2008 |
Yoshihisa Nakatoh, Fukuoka JP
Patent application number | Description | Published |
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20120114155 | HEARING AID - 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. | 05-10-2012 |