公开(公告)号：US09883303B2

公开(公告)日：2018-01-30

申请号：US14916567

申请日：2014-09-19

Applicant: CLARION CO., LTD.

Inventor： Takeshi Hashimoto ,  Kazutomo Fukue ,  Tetsuo Watanabe ,  Yasuhiro Fujita

IPC: H04R29/00 ,  G10L21/14 ,  G10L21/18 ,  G01H3/12 ,  H04S1/00

CPC classification number: H04R29/001 ,  G01H3/125 ,  G10L21/14 ,  G10L21/18 ,  H04R29/008 ,  H04S1/00 ,  H04S2400/15

Abstract: A sound field measuring device (1) obtains frequency characteristics by collecting output sound outputted from a pair of speakers (101a, 101b) installed at a narrow interval. A low-pass filter (22a) extracts low-range components of a first measurement signal. A high-pass filter (22b) extracts mid/high-range components of a second measurement signal different from the first measurement signal. A combined signal generation unit (22c) generates a combined signal by combining the low-range components of the first measurement signal and the mid/high-range components of the second measurement signal. An external output unit (6) outputs the first measurement signal to an audio system (102). A microphone (7) collects the first measurement signal and the combined signal simultaneously outputted from the pair of speakers. A Fourier transform unit (13) obtains the frequency characteristics of a sound field by Fourier transforming the signals collected.

公开(公告)号：US10270412B2

公开(公告)日：2019-04-23

申请号：US15549541

申请日：2016-02-12

Applicant: Clarion Co., Ltd.

Inventor： Kazutomo Fukue ,  Takeshi Hashimoto ,  Tetsuo Watanabe ,  Takatomi Kumagai ,  Yasuhiro Fujita

IPC: H03G5/16 ,  H04S7/00 ,  G10K15/00

Abstract: A sound-field correction device, comprising: a target calculating unit, a correction amplitude characteristic calculating unit and a setting unit. The target calculating unit calculates, based on a predetermined sound signal, a target amplitude characteristic targeted for sound-field correction by a parametric equalizer and a plurality of auxiliary target amplitude characteristics having amplitude characteristics approximately equal to or gentler than the target amplitude characteristic. The correction amplitude characteristic calculating unit calculates a correction amplitude characteristic for correction sound-field based on the calculated target amplitude characteristic and the calculated plurality of auxiliary target amplitude characteristics. The setting unit sets the parametric equalizer based on the calculated correction amplitude characteristic.

公开(公告)号：US10147434B2

公开(公告)日：2018-12-04

申请号：US14894579

申请日：2014-05-26

Applicant: CLARION CO., LTD.

Inventor： Takeshi Hashimoto ,  Tetsuo Watanabe ,  Yasuhiro Fujita ,  Kazutomo Fukue

IPC: G10L19/02 ,  G10L19/032 ,  G10L21/0388 ,  G10L25/18

Abstract: A signal processing device comprises: a band detecting means for detecting a frequency band which satisfies a predetermined condition from an audio signal; a reference signal generating means for generating a reference signal in accordance with a detection band by the band detecting means; a reference signal correcting means for correcting the generated reference signal on the basis of a frequency characteristic thereof; a frequency band extending means for extending the corrected reference signal up to a frequency band higher than the detection band; an interpolation signal generating means for generating an interpolation signal by weighting each frequency component within the extended frequency band in accordance with a frequency characteristic of the audio signal; and a signal synthesizing means for synthesizing the generated interpolation signal with the audio signal.

公开(公告)号：US09986352B2

公开(公告)日：2018-05-29

申请号：US15118930

申请日：2015-02-04

Applicant: Clarion Co., Ltd.

Inventor： Yasuhiro Fujita ,  Takeshi Hashimoto ,  Tetsuo Watanabe ,  Kazutomo Fukue

IPC: H04R29/00 ,  H04R3/04 ,  H04R3/00

CPC classification number: H04R29/001 ,  H04R3/007 ,  H04R3/04 ,  H04R2227/007 ,  H04R2499/13

Abstract: An acoustic processing device comprises: a resonant band detecting means that detects a resonant band of sound output from a speaker based on a measurement result of a predetermined measurement signal reproduced through the speaker; an analyzing means that analyzes the measurement result of the predetermined measurement signal; a control parameter generating means that generates a control parameter for controlling the resonant band detected by the resonant band detecting means based on an analysis result by the analyzing means; and an audio signal controlling means that controls an audio signal input from a predetermined audio signal reproducing device based on the control parameter generated by the control parameter generating means such that a resonant band component of reproduced sound of the audio signal is suppressed to be short on a time axis.

公开(公告)号：US20180034434A1

公开(公告)日：2018-02-01

申请号：US15549541

申请日：2016-02-12

Applicant: Clarion Co., Ltd.

Inventor： Kazutomo Fukue ,  Takeshi Hashimoto ,  Tetsuo Watanabe ,  Takatomi Kumagai ,  Yasuhiro Fujita

IPC: H03G5/16

CPC classification number: H03G5/165 ,  G10K15/00 ,  H03G5/16 ,  H04R2499/13 ,  H04S7/301 ,  H04S7/302 ,  H04S7/307

Abstract: A sound-field correction device, comprising: a target calculating means that calculates, based on a predetermined sound signal, a target amplitude characteristic targeted for sound-field correction by a parametric equalizer and a plurality of auxiliary target amplitude characteristics having amplitude characteristics approximately equal to or gentler than the target amplitude characteristic; a correction amplitude characteristic calculating means that calculates a correction amplitude characteristic for correcting sound-filed based on the calculated target amplitude characteristic and the plurality of auxiliary target amplitude characteristics; and a setting means that sets the parametric equalizer based on the calculated correction amplitude characteristic.

公开(公告)号：US09559658B2

公开(公告)日：2017-01-31

申请号：US14898882

申请日：2014-06-09

Applicant: CLARION CO., LTD.

Inventor： Kazutomo Fukue

IPC: H03G5/02 ,  G06F17/14

CPC classification number: H03G5/025 ,  G06F17/14 ,  H03G5/02 ,  H03H17/0213

Abstract: A filter coefficient group computation device is configured from a means for performing inverse Fourier transform on a frequency characteristic inputted through an input means; a means for performing short-term Fourier transform on a numerical string obtained by the inverse Fourier transform; a means for performing windowing on a frequency domain signal, obtained by the short-term Fourier transform, using a function of which a window length shortens as frequency increases; a means for performing short-term inverse Fourier transform on the frequency domain signal after the windowing; a means for performing overlap addition on a numerical string obtained by the short-term inverse Fourier transform; and a means for determining a numerical string after the overlap addition as a filter coefficient group which forms a filter having the frequency characteristic inputted through the input means.

Abstract translation: 滤波器系数组计算装置由用于对通过输入装置输入的频率特性执行逆傅立叶变换的装置构成; 对通过逆傅里叶变换获得的数字串执行短期傅里叶变换的装置; 用于通过短期傅里叶变换获得的频域信号进行窗口化的装置，使用窗口长度随频率增加而缩短的函数; 用于在开窗之后对频域信号进行短期傅里叶逆变换的装置; 对通过短期傅里叶逆变换获得的数字串进行重叠加法的装置; 以及用于确定重叠相加之后的数字串的装置，作为形成具有通过输入装置输入的频率特性的滤波器的滤波器系数组。