Jvc Kenwood Corporation

Masaya Konishi

Hisako Murata

Yumi Fujii

Takahiro Gejo

Kuniaki Takachi

Toshiaki Nagai

Takayuki Uchida

Hiroshi Uchida

Satoshi Yoshimura

Shuji Tanifuji

Takaaki Yamabe

Tatsuya Onoda

Kenji Ejima

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

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

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.

A processor of a filter generation device according to an embodiment includes an extraction unit that extracts a first signal having a first number of samples from samples preceding a boundary sample of a sound pickup signal, a signal generation unit that generates a second signal containing a direct sound from a sound source and having a second number of samples larger than the first number of samples based on the first signal, a transform unit that transforms the second signal into a frequency domain and generates a spectrum, a correction unit that increases a value of the spectrum in a correction band and generates a corrected spectrum, an inverse transform unit that inversely transforms the corrected spectrum into a time domain and generates a corrected signal, and a generation unit that generates a filter based on the sound pickup signal and the corrected signal.

Filter generation device, filter generation method, and program

An out-of-head localization filter determination system according to an embodiment includes headphones, a microphone unit, an out-of-head localization device, and a server device. The out-of-head localization device transmits user data based on measurement data to the server. The server device includes a data storage unit configured to store a plurality of first and second preset data acquired for a plurality of persons being measured, a comparison unit configured to compare the user data with the plurality of second preset data, and an extraction unit configured to extract first preset data from the plurality of first preset data based on a comparison result.

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

A microphone according to an embodiment includes: an ear chip including a cylindrical part with a hollow part formed therein, and a contact part disposed outside the cylindrical part and configured to come into contact with an inner wall surface of an ear canal; a cable lead out to a gap between the cylindrical part and the contact part; and a microphone element disposed in the hollow part and connected to the cable.

Microphone and sound pickup method

An out-of-head localization processing apparatus according to the embodiments includes a filter selection unit configured to select a preset filter, an out-of-head localization processing unit configured to perform out-of-head localization processing using the preset filter selected, headphones configured to output, to a user, a signal of a test sound source, an input unit configured to accept a user input, a sensor unit, a three-dimensional coordinate calculation unit configured to calculate three-dimensional coordinates of a localized position of a sound image based on a detection signal from the sensor unit, and an evaluation unit configured to evaluate, based on the three-dimensional coordinates of each of the preset filters, a filter optimal for the user from the plurality of preset filters.

Out-of-head localization processing apparatus and filter selection method

A measurement device according to this embodiment includes a peak detection unit that detects positive and negative peaks included in a sound pickup signal, a sign determination unit that determines a positive or negative sign based on amplitudes at the negative and positive peaks detected by the peak detection unit, a peak group separation unit that separates a peak sequence composed of the peaks with the determined sign into a plurality of peak groups, a maximum amplitude detection unit that detects a maximum amplitude in each of the plurality of peak groups, a signal cutout unit that cuts out the sound pickup signal at cutout timing based on the maximum amplitude and generates a plurality of cutout signals, and a signal adding unit that adds the plurality of cutout signals.

Measurement device, filter generation device, measurement method, and filter generation method

A transfer characteristics measurement unit measures first transfer characteristics from left and right sound sources to left and right microphones, respectively. An environmental measurement unit picks up environmental measurement signals output from the left and right sound sources with use of the left and right microphones, sets an amplitude level of transfer characteristics measurement signals and a tap length of the transfer characteristics, picks up sounds with use of the left and right microphones in a state where no sound is output from the left and right sound sources, and measures second transfer characteristics. A correction unit corrects a low frequency range of the first transfer characteristics based on the second transfer characteristics.

Growing community of inventors

Yokohama, Japan

Masaya Konishi