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    Out-of-head localization filter determination system, out-of-head localization filter determination method, and computer readable medium
    2.
    发明授权
    Out-of-head localization filter determination system, out-of-head localization filter determination method, and computer readable medium 有权

    公开(公告)号：US11470422B2

    公开(公告)日：2022-10-11

    申请号：US17372365

    申请日：2021-07-09

    申请人： JVCKENWOOD Corporation

    发明人： Yumi Fujii ,  Hisako Murata ,  Kuniaki Takachi ,  Takahiro Gejo ,  Mayo Iiyama

    IPC分类号： H04R5/033 ,  H04R5/027 ,  H04R5/04 ,  H04S7/00

    摘要： 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.

    Filter generation device, filter generation method, and program
    3.
    发明授权
    Filter generation device, filter generation method, and program 有权

    公开(公告)号：US10805727B2

    公开(公告)日：2020-10-13

    申请号：US16549928

    申请日：2019-08-23

    申请人： JVCKENWOOD Corporation

    发明人： Hisako Murata ,  Takahiro Gejo ,  Yumi Fujii ,  Kuniaki Takachi ,  Masaya Konishi

    IPC分类号： H04R3/04 ,  H04S7/00 ,  H04R29/00

    摘要： 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.

    Out-of-head localization device, out-of-head localization method, and out-of-head localization program
    4.
    发明授权
    Out-of-head localization device, out-of-head localization method, and out-of-head localization program 有权

    公开(公告)号：US10779107B2

    公开(公告)日：2020-09-15

    申请号：US16545909

    申请日：2019-08-20

    申请人： JVCKENWOOD Corporation

    发明人： Yumi Fujii ,  Hisako Murata ,  Takahiro Gejo

    IPC分类号： H04S7/00 ,  H04R5/04 ,  H04R5/033 ,  H04R3/04

    摘要： An out-of-head localization device according to this embodiment includes an adder that calculates a common-mode signal of stereo reproduced signals, a ratio setting unit that sets a subtraction ratio for subtracting the common-mode signal, a subtraction unit that subtracts the common-mode signal from the stereo reproduced signals at the subtraction ratio and thereby generates corrected signals, a convolution calculation unit that performs convolution on the corrected signals by using spatial acoustic transfer characteristics and thereby generates a convolution calculation signal, a filter unit that performs filtering on the convolution calculation signal by using a filter and thereby generates an output signal, and headphones that output the output signal to a user.

    Filter generation device and filter generation method
    5.
    发明授权
    Filter generation device and filter generation method 有权

    公开(公告)号：US10687144B2

    公开(公告)日：2020-06-16

    申请号：US16540857

    申请日：2019-08-14

    申请人： JVCKENWOOD Corporation

    发明人： Takahiro Gejo ,  Hisako Murata ,  Yumi Fujii

    IPC分类号： H04R5/027 ,  H04R1/40 ,  H04R3/04 ,  H04R5/033 ,  H04S1/00 ,  H04S3/00 ,  H04S7/00

    摘要： A processor of a filter generation device according to this embodiment includes a first synchronous addition unit that generates a first synchronous addition signal, a second synchronous addition unit that performs synchronous addition of sound pickup signals acquired with a microphone worn on an object or a person other than a listener with a second number of synchronous additions larger than a first number of synchronous additions and thereby generates a second synchronous addition signal, a first transform unit that transforms the first and second synchronous addition signals into frequency domain data so as to acquire first and second spectrums corresponding to the first and second synchronous addition signals, a first correction unit that corrects data of a first spectrum in a correction band and thereby generates a third spectrum, and a first inverse transform unit that inversely transforms the third spectrum into time domain data.

    Processing device, processing method, filter generation method, reproducing method, and computer readable medium
    6.
    发明授权
    Processing device, processing method, filter generation method, reproducing method, and computer readable medium 有权

    公开(公告)号：US12096194B2

    公开(公告)日：2024-09-17

    申请号：US17833516

    申请日：2022-06-06

    申请人： JVCKENWOOD Corporation

    发明人： Yumi Fujii ,  Toshiaki Nagai ,  Hisako Murata

    IPC分类号： H04R5/04 ,  G10K15/00 ,  H04R5/033 ,  H04R29/00 ,  H04S7/00

    CPC分类号： H04R5/04 ,  H04R5/033 ,  H04R29/002 ,  H04R29/005 ,  H04R2400/01

    摘要： 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, and program for processing sound pickup signals
    8.
    发明授权
    Processing device, processing method, and program for processing sound pickup signals 有权

    公开(公告)号：US11297427B2

    公开(公告)日：2022-04-05

    申请号：US17016674

    申请日：2020-09-10

    申请人： JVCKENWOOD CORPORATION

    发明人： Yumi Fujii ,  Hisako Murata ,  Masaya Konishi ,  Takahiro Gejo ,  Kuniaki Takachi

    IPC分类号： H04R3/00 ,  H04R1/40 ,  H04R29/00

    摘要： 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 θ, 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.