Jvc Kenwood Corporation

Yumi Fujii

Hisako Murata

Takahiro Gejo

Masaya Konishi

Kuniaki Takachi

Toshiaki Nagai

Takayuki Uchida

Mayo Iiyama

Satoshi Yoshimura

Shuji Tanifuji

Hiroshi Uchida

Sadahiro Yasura

An object of the present disclosure is to provide a filter generation device and a filter generation method, capable of generating a filter suitable for out-of-head localization processing. A processing device according to an embodiment includes: a frequency characteristics acquisition unit configured to acquire frequency characteristics based on sound pickup signals; a level calculation unit configured to calculate a reference level in the frequency characteristics; a correction unit configured to correct the frequency characteristics so that the frequency characteristics fall within a predetermined level range including the reference level, and thereby calculate corrected characteristics; and a filter generation unit configured to generate a corrected filter based on the corrected characteristics.

Filter generation device and filter generation method

A processing device according to an embodiment includes: a frequency characteristics acquisition unit configured to acquire frequency characteristics of at least one sound pickup signal; a smoothing processing unit configured to perform smoothing processing so as to generate second spectral data smoother than first spectral data based on the frequency characteristics; a first compression unit configured to calculate a first difference value corresponding to a difference between the second spectral data and the first spectral data in a first band, and to compress the second spectral data based on the first difference value; and a filter generation unit configured to generate a filter, based on the second spectral data.

Processing device and processing method

A processing device according to this embodiment includes: a frequency characteristics acquisition unit configured to acquire frequency characteristics of an input signal; an extreme value extraction unit configured to extract an extreme value of spectral data; a kurtosis calculation unit configured to: calculate an evaluation value from spectral data; and calculate a kurtosis of a peak or a dip based on a plurality of evaluation values calculated by changing a calculation width, the evaluation value being used for evaluating the peak or the dip corresponding to the extreme value; a determination unit configured to determine whether to suppress the peak or the dip according to a comparison result between the kurtosis and a threshold value; and a suppression unit configured to suppress the peak or the dip with the extreme value that is determined to be suppressed.

A processing device according to this embodiment includes: a measurement signal output unit configured to output a frequency sweep signal whose frequency is swept as a measurement signal; a sound pickup signal acquisition unit configured to acquire L-ch and R-ch sound pickup signals obtained by picking up the measurement signal by a left microphone and a right microphone; an evaluation signal acquisition unit configured to calculate an evaluation signal in a time domain in accordance with the L-ch and R-ch sound pickup signals; an extraction unit configured to extract a partial section of the evaluation signal as an extraction section; a comparison unit configured to compare the L-ch sound pickup signal with the R-ch sound pickup signal using the evaluation signal in the extraction section; and a determination unit configured to determine whether the fit of the right and left microphones or the output unit is good or not based on the results of the comparison made in the comparison unit.

Processing device, processing method, filter generation method, reproducing method, and computer readable medium

An object of the present invention is to provide a processing device, a processing method, a reproducing method, and a program capable of performing appropriate processing. A processing device according to the present embodiment includes: an envelope computation unit computing an envelope for a frequency response of a sound pickup signal; a scale conversion unit generating scale converted data by performing scale conversion and data interpolation on frequency data of the envelope; a normalization factor computation unit dividing the scale converted data into a plurality of frequency bands, obtaining a characteristic value for each frequency band, and computing a normalization factor, based on the characteristic values; and a normalization unit, using the normalization factor, normalizing the sound pickup signal in the time domain.

Processing device, processing method, reproducing method, and program

An out-of-head localization filter determination system according to an embodiment includes headphones, a microphone unit, a measurement processor, and a server device. The measurement processor measures first ear canal transfer characteristics from a first position to a microphone, measures ear canal transfer characteristics from a second position to a microphone, and transmits user data related to the first ear canal transfer characteristics to the server device. The server device includes a storage unit that stores first preset data and a second preset data in association with each other, a comparison unit that compares the second preset data with the user data, and an extraction unit that extracts the first preset data according to a comparison result.

Headphones, out-of-head localization filter determination device, out-of-head localization filter determination system, out-of-head localization filter determination method, and program

A processor, an out-of-head localization filter generation method, and a program capable of performing appropriate processing are provided. An out-of-head localization filter determination device according to this embodiment includes a built-in microphone embedded in an output unit, a measurement unit configured to output a measurement signal to the output unit and measure a sound pickup signal output from the built-in microphone, a frequency characteristics acquisition unit configured to convert the sound pickup signal into a frequency domain and acquire first frequency characteristics, a conversion unit configured to convert the first frequency characteristics into second frequency characteristics by applying a representative conversion function to the first frequency characteristics, and an inverse filter calculation unit configured to calculate an inverse filter based on the second frequency characteristics.

Processor, out-of-head localization filter generation method, and program

An out-of-head localization filter determination system according to this embodiment includes a microphone unit that is worn on a user's ear and picks up sounds output from an output unit, a measurement unit that measures a sound pickup signal output from the microphone unit, a data storage unit that stores first preset data related to spatial acoustic transfer characteristics and second preset data related to ear canal transfer characteristics in association with each other, a frequency characteristics acquisition unit that converts the sound pickup signal into a frequency domain and acquires frequency characteristics, an extreme value extraction unit that extracts a local maximum value and a local minimum value of the frequency characteristics, and an envelope calculation unit that calculates first envelope data and second envelope data by interpolating each of the local maximum value and the local minimum value.

Out-of-head localization filter determination system, out-of-head localization filter determination method, and computer readable medium

To provide an out-of-head localization system, a filter generation device, a method, and a program capable of appropriate processing, an out-of-head localization system according to this embodiment includes a measurement device that measures transfer characteristics by using a microphone worn on a user's ear before the user U sits on a seat, an out-of-head localization device that is installed in the seat and performs out-of-head localization by using a filter appropriate to the transfer characteristics, and a server terminal that transmits the filter appropriate to the transfer characteristics to the out-of-head localization device on the basis of identification information of the user U.

Out-of-head localization system, filter generation device, method, and program

A processing device according to an embodiment includes a sound pickup signal acquisition unit that acquires sound pickup signals picked up by left and right microphones through a monophonic input terminal, a switch unit that switches a connection state so that a first sound pickup signal picked up only by the left microphone and a second sound pickup signal picked up only by the right microphone are input, an interaural distance acquisition unit that acquires an interaural distance of the listener, a front time difference acquisition unit that acquires a front time difference, an incident time difference calculation unit that calculates an incident time difference based on an angle &#x3b8;, the front time difference, and the interaural distance, and a transfer characteristics generation unit that calculates transfer characteristics by applying a delay corresponding to the incident time difference to the first and second sound pickup signals.

Processing device, processing method, and program for processing sound pickup signals

Provided are an out-of-head localization system, a filter generation device, a method, and a program capable of appropriate processing. A processing device according to an embodiment includes a frequency information acquisition unit that acquires frequency information on the basis of a frequency response of a filter used in filter processing on a reproduction signal, a time information acquisition unit that acquires, on the basis of the frequency information, time information of a reproduction signal, a time signal extraction unit that extracts, on the basis of the time information, a time signal corresponding to at least some time of the reproduction signal, a filter processing unit that performs filter processing on the time signal, and a gain acquisition unit that acquires a gain on the basis of the time signal not having undergone filter processing and a processed time signal having undergone filter processing.

Processing device, processing method, reproduction method, and program

A signal processing device according to an embodiment includes a measurement signal generation unit that generates a first measurement signal and outputs the signal to headphones, a sound pickup signal acquisition unit that acquires a first sound pickup signal obtained by picking up the first measurement signal by a microphone, a signal analysis unit that calculates a frequency response of the first sound pickup signal, a fit determination unit that determine a fit of the headphones by comparing a response value of the frequency response in a specified frequency band with a reference value, and a display unit that outputs gradual results of the determination in accordance with a percentage of the response value with respect to the reference value.

Signal processing device, signal processing method, and program

A sound pickup device according to this embodiment includes a microphone part placed at a sound pickup position in close proximity to an ear hole without blocking an ear canal, and positioned so as to face outside of the ear canal, and a wire having flexibility and extending to the sound pickup position. Further, in this embodiment, at least part of the wire is formed along an auricle.

Sound pickup device and sound pickup method

A filter determination system, a filter determination device, a filter determination method and a program with which a filter can be appropriately determined are provided. A processing device according to this embodiment includes a frequency response acquisition unit that acquires a frequency response of a filter for an audio signal, a smoothing unit that smoothes the frequency response and obtains a smoothed response, a candidate point determination unit that determines candidate split points based on a bottom position of the smoothed response, and a split point determination unit that determines one or more band split points from the candidate split points.

Processing device, processing method, and program

A signal processing device of an embodiment includes a measurement signal generation unit that generates a measurement signal to be output from the sound source, a sound pickup signal acquisition unit that acquires sound pickup signals picked up by a plurality of microphones, a sound source information acquisition unit that acquires sound source information about a horizontal angle of a sound source, filters that have a passband set based on the sound source information and output a filter passing signal in response to input of the sound pickup signals, a phase difference detection unit that detects a phase difference between two sound pickup signals based on the filter passing signal, and a determination unit that determines a result of measurement of the sound pickup signals by comparing the phase difference with an effective range set based on the sound source information.

Growing community of inventors

Yokohama, Japan

Yumi Fujii