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公开(公告)号：US12262194B2
公开(公告)日：2025-03-25
申请号：US17949063
申请日：2022-09-20
Applicant: ALPS ALPINE CO., LTD.
Inventor： Ryosuke Tachi , Taiji Karasawa , Francesto Villamizar
IPC: H04S7/00
Abstract: A surround sound entertainment system configured to determine a microphone position relative to a first loudspeaker, the system comprising: first loudspeaker interface configured to send first acoustic signals to first loudspeaker; second loudspeaker interface configured to send second acoustic signals to second loudspeaker; microphone interface configured to receive microphone data from microphone; acoustic processor configured to generate acoustic signal output to each of first and second loudspeakers; and non-transitory memory comprising instructions executable by the acoustic processor, instructions when executed by acoustic processor, cause system to: receive microphone data via microphone interface; determine, using microphone data, time delay between reproduction of first acoustic signals on first loudspeaker and reception of corresponding sound by microphone; determine, using time delay, position of microphone relative to first loudspeaker; and determine, based on position of microphone relative to first loudspeaker, first filter parameter for modifying first acoustic signals or second acoustic signals.
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公开(公告)号：US11482204B2
公开(公告)日：2022-10-25
申请号：US17362413
申请日：2021-06-29
Inventor： Ryosuke Tachi , Yuji Saito , Yoshinobu Kajikawa
IPC: G10K11/178
Abstract: In a first system signal processing unit, a first system auxiliary filter generates a correction signal for correcting an error signal from a noise signal, a first system subtractor subtracts the correction signal from an output of a first microphone to obtain an error signal, an adaptive filter performs an adaptive operation using the error signal to generate a cancel sound output from a first speaker, and a DMS detects a position of a user's ear. When the position of the user's ear moves, the controller stops the adaptive operation, updates the transfer function of the first system auxiliary filter to the transfer function corresponding to the noise cancel position matching the position of the user's ear, gradually changes the transfer function of the adaptive filter to the transfer function corresponding to the matching noise cancel position, and resumes the adaptive operation after the change is completed.
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公开(公告)号：US20220293079A1
公开(公告)日：2022-09-15
申请号：US17689294
申请日：2022-03-08
Applicant: Alps Alpine Co., LTD
Inventor： Ryosuke Tachi
IPC: G10K11/178 , G10L21/0208 , H04R3/00 , H04R1/40 , G10L25/84
Abstract: A signal e(z) obtained by subtracting echo-canceling sound from an output of a second microphone is used as an error of an echo cancellation adaptive filter and a noise cancellation adaptive filter, and an output of a first sound source device is added to the signal e(z) and output from a first speaker. The echo cancellation adaptive filter generates echo-canceling sound from an addition signal of the output of the second sound source device and the output of the first microphone such that the signal e(z) is minimized. The noise cancellation adaptive filter generates the noise-canceling sound from the output of the first sound source device such that the signal e(z) is minimized, and outputs the noise-canceling sound from the second speaker.
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公开(公告)号：US12112733B2
公开(公告)日：2024-10-08
申请号：US18113225
申请日：2023-02-23
Applicant: Alps Alpine Co., LTD.
Inventor： Ryosuke Tachi
IPC: G10K11/178 , B60N2/005 , B60N2/90
CPC classification number: G10K11/17817 , B60N2/005 , B60N2/90 , G10K11/17815 , G10K11/17823 , G10K11/17825 , G10K11/17881 , G10K2210/1282 , G10K2210/3022 , G10K2210/3026 , G10K2210/3027 , G10K2210/3028 , G10K2210/3044 , G10K2210/3046 , G10K2210/3055 , G10K2210/505
Abstract: A noise canceling adaptive filter outputs, from a front seat speaker, a noise canceling sound generated by applying a transfer function X(z) adapted by an adaptive operation using an output of a front seat microphone as an error to an output sound of a sound source apparatus. An output of the front seat microphone is added to an output of an audio feedback canceling filter by a second adder, added to an output sound of the sound source apparatus by a third adder, and output from a rear seat speaker. The audio feedback canceling filter applies a transfer function X′(z) and a transfer function C{circumflex over ( )}(z) on an output of the second adder and outputs a resultant. The transfer function C{circumflex over ( )}(z) corresponds to a transfer function C(z) from the front seat speaker to the front seat microphone. In synchronization control, the transfer function X(z) is set as the transfer function X′(z).
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公开(公告)号：US12052549B2
公开(公告)日：2024-07-30
申请号：US17656026
申请日：2022-03-23
Applicant: ALPS ALPINE CO., LTD.
Inventor： Ryosuke Tachi , Masashi Kaneko , Tadashi Sakashita , Arata Tada
CPC classification number: H04R29/001 , H04R7/12 , H04R9/025 , H04R9/046 , H04R9/06
Abstract: A speaker includes a yoke configured to form a magnetic circuit, a first magnet provided in a fixed manner, a voice coil provided in a gap through which a magnetic flux of the magnetic circuit is configured to pass, a diaphragm connected to the voice coil and configured to vibrate with the voice coil, a second magnet provided on a diaphragm unit including the voice coil and the diaphragm, and a magnetic sensor provided at a position through which both of a first magnetic flux generated by the first magnet and a second magnetic flux generated by the second magnet are configured to pass, wherein a direction of the first magnetic flux and a direction of the second magnetic flux are different from each other.
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Patent Agency Ranking
公开(公告)号：US11922916B2
公开(公告)日：2024-03-05
申请号：US17689294
申请日：2022-03-08
Applicant: Alps Alpine Co., LTD
Inventor： Ryosuke Tachi
IPC: G10K11/178 , G10L21/0208 , G10L25/84 , H04R1/40 , H04R3/00
CPC classification number: G10K11/17817 , G10K11/17854 , G10K11/17857 , G10L21/0208 , G10L25/84 , H04R1/406 , H04R3/005 , G10L2021/02082 , H04R2499/13
Abstract: A signal e(z) obtained by subtracting echo-canceling sound from an output of a second microphone is used as an error of an echo cancellation adaptive filter and a noise cancellation adaptive filter, and an output of a first sound source device is added to the signal e(z) and output from a first speaker. The echo cancellation adaptive filter generates echo-canceling sound from an addition signal of the output of the second sound source device and the output of the first microphone such that the signal e(z) is minimized. The noise cancellation adaptive filter generates the noise-canceling sound from the output of the first sound source device such that the signal e(z) is minimized, and outputs the noise-canceling sound from the second speaker.
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公开(公告)号：US20230164491A1
公开(公告)日：2023-05-25
申请号：US17734319
申请日：2022-05-02
Applicant: Alps Alpine Co., LTD
Inventor： Hiroki Toita , Ryosuke Tachi , Ryo Ito
CPC classification number: H04R9/027 , H04R1/2803 , H04R9/046 , G01R33/072 , H04R2400/11
Abstract: A vibrating unit includes a diaphragm and a bobbin, and a voice coil is secured to the bobbin. A detecting unit includes a moving magnet and a magnetic sensor. An annular magnet support is secured to a front edge of the bobbin, and the moving magnet is positioned and secured to the magnet support. The magnetic sensor is secured to a drive supporting unit. The moving magnet is secured to the bobbin, with the magnet support therebetween. This facilitates mounting and positioning of the moving magnet.
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公开(公告)号：US11462205B2
公开(公告)日：2022-10-04
申请号：US17361979
申请日：2021-06-29
Inventor： Ryosuke Tachi , Yoshinobu Kajikawa
IPC: G10K11/178 , H04R3/00
Abstract: A first variable filter receives a sound of a second seat audio source as an input and generates a cancel sound for canceling the sound of the second seat audio source at a first seat. The transfer functions of the first variable filter and the second variable filter are updated such that the level of a signal obtained by subtracting the output of the auxiliary filter that generates a correction signal for correcting the difference between the positions of the first seat microphone and the first seat and the output of the second variable filter that receives the sound of the first seat audio source from the output of the first seat microphone is minimized. While the level of the signal exceeds a threshold, the signal is relayed to the second seat as a spoken voice.
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公开(公告)号：US20220005451A1
公开(公告)日：2022-01-06
申请号：US17363306
申请日：2021-06-30
Inventor： Ryosuke Tachi , Yoshinobu Kajikawa
IPC: G10K11/178
Abstract: A transfer function of a first variable filter is updated to output, from an output of a first seat microphone, a cancel sound that minimizes a level of a signal obtained by subtracting an output of an auxiliary filter that generates a correction signal for correcting a difference between positions of the first seat microphone and the first seat. In the ICC mode in which the uttered voice of the user in the first seat is output from a second seat speaker, a selector sets an uttered voice Dp output from the second seat speaker as an input to the first variable filter, and in the non-ICC mode, the selector sets an output sound of a second seat audio source output from the second seat speaker as an input to the first variable filter. The uttered voice Dp is generated by removing a component of the cancel sound from the output of the first seat microphone.
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公开(公告)号：US12035115B2
公开(公告)日：2024-07-09
申请号：US17860861
申请日：2022-07-08
Applicant: Alps Alpine Co., LTD
Inventor： Yuji Saito , Hiroki Toita , Hiroyuki Taguchi , Ryosuke Tachi , Tatsuya Mashiko
IPC: H04R3/00
CPC classification number: H04R3/007
Abstract: In a speaker distortion correction device, an input signal passes through a nonlinear-portion correction filter and is input into a linear inverse filter. An output signal from the linear inverse filter is output into a speaker through an amplifier. For the nonlinear-portion correction filter, transfer characteristics (filter coefficients) are set that eliminate distortion due to nonlinear characteristics of the speaker. With a difference, as an error, between vibration of the speaker without distortion relative to an input signal and vibration of a vibration system of the speaker measured by a vibration measurement unit, an adaptive-algorithm execution unit performs an adaptive operation that adaptively updates filter coefficients of the linear inverse filter. When the amplitude of vibration of the vibration system of the speaker measured by the vibration measurement unit deviates from a range that normal relative to an input voltage input into the speaker, a control unit stops the adaptive operation of the adaptive-algorithm execution unit.
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