公开(公告)号：US11956604B2

公开(公告)日：2024-04-09

申请号：US17858248

申请日：2022-07-06

Applicant: ALPS ALPINE CO., LTD.

Inventor： Ryosuke Tachi ,  Hiroyuki Taguchi

IPC: H04R3/00 ,  H04R1/02 ,  H04R1/40 ,  H04R3/04

CPC classification number: H04R3/002 ,  H04R1/025 ,  H04R1/406 ,  H04R3/04 ,  H04R2201/401 ,  H04R2410/01 ,  H04R2499/13

Abstract: A right seat processing unit includes, assuming that a voice of a user in a right front seat is a right front seat voice, a filter HR that converts the right front seat voice being output from a left front seat microphone disposed on a headrest of a left front seat into the right front seat voice collected by a right seat virtual microphone that is a virtual microphone located on a left side of a headrest of the right front seat, a delay unit Z-TR that delays and outputs an output from a right front seat microphone located on a right side of the headrest of the right front seat, a filter WRA that extracts the right front seat voice being output from the filter HR, a filter WRB that extracts the right front seat voice being output from the delay unit Z-TR, and a right adder that adds outputs of the filter WRA and the filter WRB and outputs an added output as a right front seat speech voice signal.

公开(公告)号：US20230018804A1

公开(公告)日：2023-01-19

申请号：US17858248

申请日：2022-07-06

Applicant: ALPS ALPINE CO., LTD.

Inventor： Ryosuke Tachi ,  Hiroyuki Taguchi

IPC: H04R3/00 ,  H04R1/02 ,  H04R1/40 ,  H04R3/04

Abstract: A right seat processing unit includes, assuming that a voice of a user in a right front seat is a right front seat voice, a filter HR that converts the right front seat voice being output from a left front seat microphone disposed on a headrest of a left front seat into the right front seat voice collected by a right seat virtual microphone that is a virtual microphone located on a left side of a headrest of the right front seat, a delay unit Z-TR that delays and outputs an output from a right front seat microphone located on a right side of the headrest of the right front seat, a filter VVRA that extracts the right front seat voice being output from the filter HR, a filter WRB that extracts the right front seat voice being output from the delay unit Z-TR, and a right adder that adds outputs of the filter WRA and the filter WRB and outputs an added output as a right front seat speech voice signal.

公开(公告)号：US20230012785A1

公开(公告)日：2023-01-19

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

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.

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.