Patent application number | Description | Published |
20100266075 | INFRARED SIGNAL DECODE CIRCUIT AND INFRARED SIGNAL DECODE METHOD - According to one embodiment, an infrared signal decode circuit includes: a comparator; a correlation signal generator generating a sum of a first detection signal and a second detection signal as a correlation signal, the first detection signal being obtained by performing an absolute value calculation on a first correlation signal, the second detection signal being obtained by performing an absolute value calculation on a second correlation signal, the first correlation signal corresponding to a correlation between a binary signal and a first reference signal with a frequency substantially identical to a base frequency of a subcarrier of an infrared signal, the second correlation signal corresponding to a correlation between the binary signal and a second reference signal with a phase that differ from a phase of the first reference signal by 90 degrees; and a decoder binarizing the correlation signal generated by the correlation signal generator. | 10-21-2010 |
20100274369 | SIGNAL PROCESSING APPARATUS, SOUND APPARATUS, AND SIGNAL PROCESSING METHOD - According to one embodiment, a signal processing apparatus, includes: an output module configured to output a sound source signal to an external environment; a receiver configured to receive a response signal responding to the sound source signal output by the output module; an extracting module configured to extract a noise component signal from the response signal received by the receiver using an inverse filtering process of a frequency characteristic, the frequency characteristic being set in advance by dividing a measurement response signal responding to a measurement sound source signal used to measure the external environment from the measurement source signal, the measurement source signal being one of the sound source signal output by the output module; and a removing module configured to remove the noise component signal from the sound source signal output by the output module after the extraction of the noise component signal. | 10-28-2010 |
20100329481 | ACOUSTIC CORRECTION APPARATUS AND ACOUSTIC CORRECTION METHOD - According to one embodiment, an acoustic correction apparatus includes: a signal obtaining module configured to obtain an acoustic signal from a target space including an object and an external space; a signal output module configured to output to the target space a measurement signal; a coefficient identifying module configured to identify, on the basis of a response acoustic signal, a correction coefficient of a correction filter that reduces a resonance frequency component of a resonance in the object; a filtering module configured to use the correction filter, and filter the signal provided to the object; a noise cancelling module configured to remove, on the basis of the acoustic signal, a noise component comprised in the acoustic signal from the filtered signal; and an output module configured to output the acoustic signal, from which the noise component is removed by the noise cancelling module, to the object. | 12-30-2010 |
20120002823 | ACOUSTIC CORRECTION APPARATUS, AUDIO OUTPUT APPARATUS, AND ACOUSTIC CORRECTION METHOD - According to one embodiment, an acoustic correction apparatus includes an input module, a calculator, a divider, a converter, an extractor, a synthesizer, and a generator. The input module receives an audio signal propagated through a sound field. The calculator calculates an impulse response from the audio signal. The divider divides the impulse response into first and second impulse responses. The converter converts the first and second impulse responses into first and second frequency spectrums. The extractor specifies an amplitude component of the first frequency spectrum with a peak relatively higher than that of the amplitude component of the first frequency spectrum, and extracts the peak as a resonance component. The synthesizer synthesizes a first property and a second property for attenuating the resonance component. The generator generates a correction filter for performing correction to obtain the synthesized property. | 01-05-2012 |
20120155673 | Compensation Filtering Device and Method Thereof - According to one embodiment, a compensation filtering device includes an impulse response calculator, a group delay compensator, and an extractor. The impulse response calculator calculates an impulse response of a reproduction system comprising a sound field. The group delay compensator compensates for group delay characteristics in a low frequency range lower than a predetermined frequency for a finite impulse response (FIR) filter having reverse characteristics of the impulse response based on group delay characteristics in a middle to high frequency range higher than the predetermined frequency. The extractor extracts a predetermined number of taps from the FIR filter that has been compensated for by the group delay compensator. | 06-21-2012 |
20120158809 | Compensation Filtering Device and Method Thereof - According to one embodiment, a compensation filtering device includes an impulse response calculator, a coefficient calculator, and an adder. The impulse response calculator calculates an impulse response of a reproduction system comprising a sound field. The coefficient calculator calculates a compensation coefficient to compensate for a tap coefficient such that a direct current gain of an extracted finite impulse response (FIR) filter with a predetermine number of taps extracted from an FIR filter having reverse characteristics of the impulse response takes a predetermined value. The tap coefficient indicates a weight of each of the taps. The adder adds the compensation coefficient to the tap coefficient of each of the taps of the extracted FIR filter to generate a compensation filter to compensate for acoustic characteristics of the reproduction system. | 06-21-2012 |
20120275616 | SOUND SIGNAL PROCESSOR AND SOUND SIGNAL PROCESSING METHODS - According to one embodiment, a sound signal processor includes: a connector; an input module; and a generator. The connector is connectable with an earphone. The input module receives and processes a plurality of sound signals corresponding to sound of a plurality of times output from the earphone, respectively. The generator generates, by using first data indicating a frequency characteristic of a first sound signal among the received and processed sound signals and second data indicating a frequency characteristic of a second sound signal among the received and processed sound signals, correction data correcting a frequency characteristic of the earphone to be a target frequency characteristic set as a target. The first data is used for a first frequency band lower than or equal to a reference. The second data is used for a second frequency band higher than the reference. | 11-01-2012 |
20150156600 | METHOD AND ELECTRONIC DEVICE - According to one embodiment, a method of reproducing sound from an electronic device includes delaying a first phase of a first sound with respect to a phase of an input signal, and advancing a second phase of a second sound with respect to the phase of the input signal. The first sound is configured to be output from a first speaker of a plurality of speakers arranged adjacent to each other. The first speaker is at a first position. The second sound is configured to be output from a second speaker out of the plurality speakers. The second speaker is at a second position. A distance between the first position and a user is smaller than a distance between the second position and the user. | 06-04-2015 |
Patent application number | Description | Published |
20100316225 | ELECTRO-ACOUSTIC CONVERSION APPARATUS - According to one embodiment, A microphone-earphone includes a speaker connected to an acoustic device configured to measure acoustic characteristics of a listener's external auditory canal, and configured to output an acoustic signal toward the listener's external auditory canal, a microphone device disposed outside the listener's external auditory canal, an acoustic tube including one end connected to the microphone device and the other end opening to the listener's external auditory canal, and a housing including an opening portion which accommodates the speaker and is so disposed as to guide sound, which is output from the speaker, to the listener's external auditory canal. An inside diameter of the acoustic tube is less than a diameter of the opening portion. | 12-16-2010 |
20110158427 | AUDIO SIGNAL COMPENSATION DEVICE AND AUDIO SIGNAL COMPENSATION METHOD - An audio signal compensation device includes: a signal processor configured to perform filtering on an input audio signal; a filter coefficients storage module configured to store a plurality of filter coefficients; a user interface configured to provide options for a determination of filter coefficients to a user and to obtain a selection result from the user; and a filter coefficients determining module configured to determine a set of filter coefficients among the plurality of filter coefficients based on the selection result. The options for the determination of filter coefficients are produced by selecting a first filter coefficient and a second filter coefficient from the plurality of filter coefficients, the first filter coefficient corresponding to a first characteristic quantity of external auditory canal characteristics, the second filter coefficient corresponding to a second characteristic quantity of the external auditory canal characteristics which is predicted based on the first characteristic quantity. | 06-30-2011 |
20110274292 | ACOUSTIC CHARACTERISTIC CORRECTION COEFFICIENT CALCULATION APPARATUS, ACOUSTIC CHARACTERISTIC CORRECTION COEFFICIENT CALCULATION METHOD AND ACOUSTIC CHARACTERISTIC CORRECTION APPARATUS - According to one embodiment, an acoustic characteristic correction coefficient calculation apparatus includes a frequency converter, a smoother, a frequency inverter, a cutter, and a calculator. The frequency converter is configured to convert a first impulse response corresponding to an input acoustic signal to a frequency domain. The smoother is configured to smooth amplitude and phase corresponding to the frequency domain converted by the frequency converter. The frequency inverter is configured to convert a frequency characteristic smoothed by the smoother to a time domain. The cutter is configured to cut out a second impulse response configured by the time domain obtained by converting the frequency characteristic by use of the frequency inverter by a preset tap number. The calculator is configured to calculate a correction coefficient used to correct an acoustic characteristic based on a result cut out by the cutter. | 11-10-2011 |
20120134502 | Audio Correction Apparatus and Audio Correction Method - According to one embodiment, audio correction apparatus connected to audio player, includes output module configured to output audio signal as sound, and filter configured to correct the audio signal based on tap coefficient is provided. The apparatus includes, audio measurement module configured to pick up plurality of recording signals obtained by recording sound output from output module at detection points located at different points, audio analyzer configured to calculate plurality of frequency responses based on plurality of recording signals obtained by audio measurement module, and audio correction module configured to calculate maximum amplitude response by specifying maximum amplitude for each of frequencies, to calculate average group delay property for each of frequencies, to calculate tap coefficient based on maximum amplitude and average group delay property, and to output tap coefficient to filter of audio player. | 05-31-2012 |
20120219161 | PLAYBACK APPARATUS, AUDIO DATA CORRECTION APPARATUS AND PLAYBACK METHOD - According to one embodiment, a playback apparatus includes a generator, a corrector, and an audio signal output module. The generator is configured to generate correction data used for correcting a frequency characteristic of sound output from a headphone based on first data and second data, the first data indicating the frequency characteristic of sound output from the headphone, and the second data indicating a target frequency characteristic. The corrector is configured to correct audio data based on the correction data. The audio signal output module is configured to output an audio signal based on the corrected audio data to the headphone. | 08-30-2012 |
20130028429 | INFORMATION PROCESSING APPARATUS AND METHOD OF PROCESSING AUDIO SIGNAL FOR INFORMATION PROCESSING APPARATUS - According to one embodiment, an information processing apparatus includes a measurement module and a correction filter design module. The measurement module measures frequency characteristics of an earphone connected to an output terminal using a measurement audio signal output from the output terminal and collected by a microphone. The correction filter design module designs a correction filter in association with one range of a treble range higher than a crossover frequency range and a bass range lower than the crossover frequency range, based on the measured frequency characteristics of the earphone and predetermined goal frequency characteristics. | 01-31-2013 |
20130223636 | MEASUREMENT APPARATUS AND MEASUREMENT METHOD - According to one embodiment, a measurement apparatus is configured to supply, to a output device, a second measurement signal to sweep the frequency, to receive a second received signal output from the output device when the second measurement signal is supplied to the output device, and to calculate an impulse response by convolving the second received signal and an inverted measurement signal having an inverted characteristic of the second measurement signal. The second measurement signal has a signal characteristic obtained by multiplying the first measurement signal by a characteristic of a characteristic of the amplitude spectrum. | 08-29-2013 |
20130315405 | SOUND PROCESSOR, SOUND PROCESSING METHOD, AND COMPUTER PROGRAM PRODUCT - According to one embodiment, sound processor includes: communication module; outputting module; recording module; display; input module; controller; and calculating module. The controller (i) displays, on display, message prompting user to move a sound input device to position proximate to speaker, (ii) causes the outputting module to output the test sound and causes the recording module to record first sound, (iii) displays, after the first sound is recorded, on the display, message prompting the user to move the sound input device to listening position, and (iv) causes the outputting module to output the test sound and causes the recording module to record second sound. The calculating module finds a first frequency characteristic of the first sound and a second frequency characteristic of the second sound, and calculates, based on a difference between the first and second frequency characteristics, a value for correcting the second frequency characteristic to a target frequency characteristic. | 11-28-2013 |
20130329899 | MEASURING APPARATUS AND COMPUTER PROGRAM - According to one embodiment, a measuring apparatus includes: an output module configured to temporally exclusively output, to a measuring target system, a first output signal corresponding to a first measuring signal for sweeping frequency and a second output signal corresponding to a second measuring signal for sweeping frequency and having a different amplitude characteristic from an amplitude characteristic of the first measuring signal; and a frequency characteristic computation module configured to synthesize a first frequency amplitude spectrum obtained from a first reception signal when a sound output from the measuring target system based on the first output signal is received and a second frequency amplitude spectrum obtained from a second reception signal when a sound output from the measuring target system based on the second output signal is received to generate frequency characteristic data representing an acoustic characteristic. | 12-12-2013 |
Patent application number | Description | Published |
20100166197 | SOUND CORRECTOR, SOUND MEASUREMENT DEVICE, SOUND REPRODUCER, SOUND CORRECTION METHOD, AND SOUND MEASUREMENT METHOD - According to one embodiment, a sound corrector includes a signal outputter, a response signal, a frequency specifier, a coefficient specifier, a filter, and an outputter. The signal outputter outputs a measurement signal to measure acoustical properties of an object to be measured. The response signal receiver receives a response signal from the object in response to the measurement signal. The frequency specifier specifies a resonant frequency at a resonance peak from the response signal. The coefficient specifier specifies a correction coefficient of a correction filter for reducing the resonant frequency based on the specified resonant frequency. The filter performs filtering on a signal to be output to the object using the correction filter with the correction coefficient. The outputter outputs the signal having undergone the filtering to the object. | 07-01-2010 |
20100166218 | Sound Processor, Sound Reproducer, and Sound Processing Method - According to one embodiment, a sound processor includes a creating module, a filter, and a combining module. The creating module creates a plurality of first acoustic models based on a frequency characteristic that represents an acoustic property of an object to be measured. The first acoustic models are modeled with respect to resonance properties that vary depending on frequency bands. The filter extracts frequency components in the frequency bands from the respective first acoustic models. The combining module combines the frequency components extracted from the first acoustic models to create a second acoustic model. | 07-01-2010 |
Patent application number | Description | Published |
20090208027 | APPARATUS FOR RECTIFYING RESONANCE IN THE OUTER-EAR CANALS AND METHOD OF RECTIFYING - According to one embodiment, an apparatus for cancelling resonance in an outer-ear canal, comprises an outer-ear canal model includes attenuator modules representing reflection coefficients of an earphone or headphone and an eardrum, and a delay module having a delay time corresponding to a distance between the earphone or headphone and the eardrum, an inverse-filter forming unit configured to form an inverse filter of the outer-ear canal model, and a convolution module configured to perform convolution on an impulse response from the inverse filter and a sound-source signal. | 08-20-2009 |
20090296949 | ACOUSTIC CHARACTERISTIC CORRECTION APPARATUS, ACOUSTIC CHARACTERISTIC MEASUREMENT APPARATUS, AND ACOUSTIC CHARACTERISTIC MEASUREMENT METHOD - According to one embodiment, an acoustic characteristic measurement apparatus comprises a generation module configured to generate a measuring pulse for measuring an acoustic characteristic of a subject, an acquisition module configured acquire an acoustic characteristic of the subject based on a response signal from the subject, and a transducer module configured to transduce the measurement pulse into an acoustic signal to be transmitted to the subject and transduce an acoustic response signal from the subject into an electrical response signal to be supplied to the acquisition module. | 12-03-2009 |
20090302935 | DEMODULATOR - According to one embodiment, a threshold adjusting apparatus for a clocked comparator, the clocked comparator comparing an input signal with a threshold in accordance with a clock, the threshold adjusting apparatus comprises an output detection module configured to detect an output from the clocked comparator with the threshold while changing the threshold and a setting module configured to set the threshold when the output detection module detects a change in the output from the clocked comparator as an adjusted threshold. | 12-10-2009 |
20090316919 | ACOUSTIC CHARACTERISTIC CORRECTION METHOD AND APPARATUS - According to one embodiment, an acoustic characteristic correction apparatus comprises a main module reproducing an audio signal and a remote controller includes a microphone, wherein the main module comprises a generation module generating a measurement signal, a receiver receiving a picked-up signal output from the microphone receiving the measurement signal, a detector module detecting acoustic characteristics based on the picked-up signal, a processor module obtaining correction characteristics based on the acoustic characteristics, and a correction module correcting the audio signal based on the correction characteristics. | 12-24-2009 |
20100142719 | ACOUSTIC APPARATUS AND METHOD OF CONTROLLING AN ACOUSTIC APPARATUS - According to one embodiment, an acoustic apparatus comprises an electro-acoustic transducer with a first function of converting an electric signal to an acoustic signal and a second function of converting an acoustic signal to an electric signal, the electro-acoustic transducer configured to convert a measuring electric signal to a measuring acoustic signal using the first function, and to convert an acoustic response signal responding to the measuring acoustic signal from an object to an electric response signal using the second function, a switch configured to switch the first function to the second function, or vice versa, and a switch controller configured to control a function switching of the switch in accordance with a sound source signal. | 06-10-2010 |
20100150362 | ACOUSTIC APPARATUS - According to one embodiment, an acoustic apparatus comprises a measuring signal generator, a transducer configured to convert a measuring signal to a measuring sound and to convert a characteristic vibration of the transducer due to the measuring sound, to a characteristic vibration signal, an analysis module configured to analyze the characteristic vibration signal in order to output a physical quality of a characteristic vibration of the transducer, a controller configured to set a first state in which the transducer converts an electric signal to an acoustic signal or a second state in which the transducer converts an acoustic signal to an electric signal. The measuring signal generator is connected to the transducer in the first state and the analysis module is connected to the transducer in the second state. | 06-17-2010 |