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公开(公告)号：US11251890B2
公开(公告)日：2022-02-15
申请号：US16887849
申请日：2020-05-29
Applicant: Clarion Co., Ltd.
Inventor： Kazutomo Fukue
Abstract: A mixing apparatus comprises a weighting circuit configured to, within a particular control target band, perform weighting amplitude spectra of a priority audio signal and a non-priority audio signal taking frequency masking and time masking into account, an amplitude changer configured to relatively amplify an amplitude spectrum of the priority audio signal within the control target band based on the amplitude spectrum to which the weighting has been applied, a phase changer configured to make a phase spectrum of the non-priority audio signal approach a phase spectrum of the priority audio signal, within the control target band, based on the amplitude spectrum to which the weighting has been applied, and a mixer configured to mix the priority audio signal and the non-priority audio signal after the amplitude spectrum and the phase spectrum are changed.
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公开(公告)号：US10008997B2
公开(公告)日：2018-06-26
申请号：US15545725
申请日：2016-02-24
Applicant: CLARION CO., LTD.
Inventor： Takeshi Hashimoto , Tetsuo Watanabe , Yasuhiro Fujita , Kazutomo Fukue , Takatomi Kumagai , Hideyuki Morita
CPC classification number: H03G5/165 , G06F17/156 , H03G5/005 , H03G5/025 , H03H17/0213 , H03H17/06
Abstract: A filter generator (100) generates a filter on the basis of band information (frequency) and gain characteristics (gain value) set by a user. The filter generator (100) obtains weighting factor information on the basis of the band information selected by the user and calculates a gain difference between a gain value used in a preceding filtering process and the new gain value selected by the user. The filter generator (100) then obtains a correction gain by multiplying the weighting factor information by the gain difference and generates a filter by multiplying a coefficient of the filter used in the preceding filtering process by the correction gain.
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3.发明申请公开(公告)号：US20180070177A1
公开(公告)日：2018-03-08
申请号：US15551752
申请日：2016-02-16
Applicant: Clarion Co., Ltd.
Inventor： Takeshi Hashimoto , Tetsuo Watanabe , Hideyuki Morita , Takatomi Kumagai , Yasuhiro Fujita , Kazutomo Fukue
CPC classification number: H04R3/14 , H03H17/0009 , H03H17/0213 , H03H17/08 , H04R3/00 , H04R3/04 , H04R2499/13 , H04S1/00 , H04S3/002 , H04S5/02 , H04S2420/07
Abstract: A phase control signal generation device generating a phase control signal for each of frequency bands for an audio signal converted into a frequency domain, the phase control signal generation device comprising: a setting change means that is able to change setting of a propagation delay time for each of predetermined frequency bands; a difference obtaining means that obtains a difference between propagation delay times before and after setting change; an updating means that updates a phase control amount of the frequency band for which the propagation delay time is changed, based on the obtained difference; and a phase control signal generating means that generates a phase control signal of each frequency band by performing a smoothing process for the phase control amount in a frequency domain using the updated phase control amount.
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公开(公告)号：US09693171B2
公开(公告)日：2017-06-27
申请号：US15026252
申请日：2014-09-22
Applicant: CLARION CO., LTD.
Inventor： Kazutomo Fukue , Takeshi Hashimoto , Tetsuo Watanabe , Yasuhiro Fujita
CPC classification number: H04S7/307 , H04R3/04 , H04R29/008 , H04S7/301 , H04S2400/09 , H04S2400/13 , H04S2400/15 , H04S2420/07
Abstract: A sound field measuring device (1) includes an external output unit (6) configured to output a measurement signal composed of a periodic function having a code length of 2n−1 (n is a natural number) to a speaker (9), a microphone (7) configured to pick up the measurement signal outputted from the speaker (9), a Fourier transform unit (12) configured to obtain frequency characteristics by Fourier transforming measurement sound picked up with a sample length of 2m (m is a natural number), a thinning-out unit (13) configured to remove line spectra except for the (k×2m-n+1)th line spectra (k=0, 1, 2, and the like) from the obtained frequency characteristics, and an averaging unit (14) configured to obtain averaged frequency characteristics of a sound field on the basis of frequency characteristics thinned-out.
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公开(公告)号：US10362396B2
公开(公告)日：2019-07-23
申请号：US15551752
申请日：2016-02-16
Applicant: Clarion Co., Ltd.
Inventor： Takeshi Hashimoto , Tetsuo Watanabe , Hideyuki Morita , Takatomi Kumagai , Yasuhiro Fujita , Kazutomo Fukue
IPC: H04R3/00 , H04R3/04 , H04R3/14 , H04S1/00 , H04S3/00 , H04S5/02 , H03H17/00 , H03H17/02 , H03H17/08
Abstract: A phase control signal generation device generating a phase control signal for each of frequency bands for an audio signal converted into a frequency domain, the phase control signal generation device comprising: a setting change means that is able to change setting of a propagation delay time for each of predetermined frequency bands; a difference obtaining means that obtains a difference between propagation delay times before and after setting change; an updating means that updates a phase control amount of the frequency band for which the propagation delay time is changed, based on the obtained difference; and a phase control signal generating means that generates a phase control signal of each frequency band by performing a smoothing process for the phase control amount in a frequency domain using the updated phase control amount.
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Patent Agency Ranking
公开(公告)号：US10354675B2
公开(公告)日：2019-07-16
申请号：US15322194
申请日：2015-06-22
Applicant: Clarion Co., Ltd.
Inventor： Takeshi Hashimoto , Tetsuo Watanabe , Yasuhiro Fujita , Kazutomo Fukue , Takatomi Kumagai
IPC: G10L21/0332 , G10L21/0232 , G10L21/0388
Abstract: There is provided a signal processing device, comprising: a frequency detecting means that detects a frequency satisfying a predetermined condition from an audio signal; an offset means that gives an offset to the detected frequency by the frequency detecting means in accordance with a frequency property at the detected frequency or around the detected frequency; a reference signal generating means that generates a reference signal by extracting a signal from the audio signal based on the detected frequency offset by the offset means; an interpolation signal generating means that generates an interpolation signal based on the generated reference signal; and a signal synthesizing means that performs high band interpolation by synthesizing the generated interpolation signal and the audio signal.
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公开(公告)号：US09866960B2
公开(公告)日：2018-01-09
申请号：US15129827
申请日：2015-02-20
Applicant: CLARION CO., LTD.
Inventor： Takeshi Hashimoto , Tetsuo Watanabe , Yasuhiro Fujita , Kazutomo Fukue
CPC classification number: H04R3/04 , B06B1/0238 , B06B2201/52 , B06B2201/70 , H04R1/00 , H04R1/025 , H04R3/00 , H04R5/023 , H04R29/001 , H04R2201/028 , H04R2499/13
Abstract: The present invention provides a vibration audio system for transmitting an audio signal outputted from a sound source to a listener in the form of vibration while reducing output level of the signal and power consumption. The system includes an envelope detection unit (204) for detecting an envelope signal of the audio signal outputted from a sound source, a vibration transmission member for allowing the listener to perceive vibration of a low-frequency sound outputted from a low-frequency output speaker that outputs audio signals, and a frequency conversion unit (205) for generating an audio signal frequency-converted on the basis of resonant frequencies by multiplying the envelope signal by sine waves having the same frequencies as resonance frequencies obtained from an impulse response of the low-frequency output speaker disposed in the vibration transmission member. The audio signal frequency-converted by the frequency conversion unit (205) is outputted from the low-frequency output speaker.
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公开(公告)号：US10960804B2
公开(公告)日：2021-03-30
申请号：US16617499
申请日：2018-05-17
Applicant: CLARION CO., LTD.
Inventor： Yasuhiro Fujita , Takeshi Hashimoto , Kazutomo Fukue
Abstract: A vibration generation device (200) includes a frequency information recorder (80) configured to record frequency values of inputted measurement signals such that the frequency values are associated with measurement positions of vibrations on the seat originally generated by the vibration generator (20) on the basis of the measurement signals and transmitted to the seat by the vibration transmission member and an output signal generator (70) configured to obtain a frequency value of a measurement position corresponding to a desired position from the frequency information recorder (80) and to generate an output signal having the frequency value.
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公开(公告)号：US10750283B2
公开(公告)日：2020-08-18
申请号：US16475495
申请日：2018-01-31
Applicant: CLARION CO., LTD.
Inventor： Kazutomo Fukue , Takeshi Hashimoto , Kenji Kono , Yasuhiro Fujita
Abstract: Attenuation of output levels is suppressed while interference due to a plurality of vibrators is reduced.An acoustic control device 30 performs correction processing of correcting phase delay characteristics including transmission systems from exciters 21L and 21R which are first and second vibrators connected with a rigid body, on acoustic signals SR and SL. Thereafter, the acoustic control device 30 controls the exciters 21L and 21R on the basis of the corrected acoustic signals SL1 and SR1.
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公开(公告)号：US10375500B2
公开(公告)日：2019-08-06
申请号：US14901165
申请日：2014-06-19
Applicant: CLARION CO., LTD.
Inventor： Takeshi Hashimoto , Tetsuo Watanabe , Yasuhiro Fujita , Kazutomo Fukue
Abstract: A propagation delay tune correction apparatus comprising a means for generating a frequency spectrum signal by performing short-term Fourier transform on an audio signal; a means for setting a propagation delay time for each of a plurality of predetermined frequency bands; a means for calculating a phase control amount for each of the plurality of predetermined frequency bands on a basis of the propagation delay time set for each of the plurality of predetermined frequency bands; a means for generating a phase control signal by smoothing the calculated phase control amount for each of the plurality of predetermined frequency bands; a means for controlling a phase of the frequency spectrum signal for each of the plurality of predetermined frequency bands on a basis of the generated phase control signal; and a means for generating an audio signal on which a propagation delay correction is performed by performing inverse short-term Fourier transform on the frequency spectrum signal of which the phase is controlled for each of the plurality of predetermined frequency bands.
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