公开(公告)号：US10582315B2

公开(公告)日：2020-03-03

申请号：US16035903

申请日：2018-07-16

Applicant: RION Co., Ltd.

Inventor： Nobuhiko Hiruma ,  Masahiro Sunohara

IPC: H04R25/00 ,  H04R3/02

Abstract: Provided is a hearing aid including a receiver, a microphone, an adaptive filter estimating a feedback transfer function from the receiver to the microphone, a subtractor, a hearing aid processor, a first whitening filter, a second whitening filter having a whitening filter coefficient identical to that of the first whitening filter, a coefficient updater, and a controller controlling the adaptive filter and the first and second whitening filters. The controller updates and saves, as a stabilization coefficient, the coefficient of the adaptive filter in a condition in which the autocorrelation of the first signal is low, determines the presence or absence of a change in the feedback transfer function based on the coefficient of the adaptive filter and the stabilization coefficient, and performs, when it is determined that the feedback transfer function has changed, the control in order that effectiveness of whitening by the first and second whitening filters is reduced as compared to that when it is determined that the feedback transfer function does not change.

公开(公告)号：US09392380B2

公开(公告)日：2016-07-12

申请号：US14791959

申请日：2015-07-06

Applicant: RION Co., Ltd.

Inventor： Masahiro Sunohara

IPC: H04R25/00

CPC classification number: H04R25/453 ,  G10K2210/3055 ,  H04R2225/43 ,  H04R2460/01

Abstract: A hearing aid according to an embodiment of the present disclosure includes: a microphone configured to convert sound into an electric signal and output a first signal; a receiver configured to convert the third signal that is generated by performing predetermined hearing aid processing on a second signal, into sound; a first feedback removal unit having an adaptive filter configured to adaptively estimate a first transfer function of a sound feedback path from the receiver to the microphone; and a second feedback removal unit having a fixed filter configured to receive the third signal and use a fixed filter coefficient based on a second transfer function of a vibration feedback path from the receiver to the microphone. The second signal is generated by removing from the first signal, output signals from the adaptive filter and the fixed filter.

Abstract translation: 根据本公开的实施例的助听器包括：麦克风，被配置为将声音转换为电信号并输出​​第一信号; 接收器，被配置为将通过对第二信号执行预定的助听器处理而生成的第三信号转换为声音; 第一反馈消除单元，其具有自适应滤波器，该自适应滤波器被配置为自适应地估计从接收器到麦克风的声音反馈路径的第一传递函数; 以及第二反馈消除单元，其具有被配置为接收第三信号的固定滤波器，并且使用基于从接收器到麦克风的振动反馈路径的第二传递函数的固定滤波器系数。 通过从第一信号中去除来自自适应滤波器和固定滤波器的输出信号来产生第二信号。

公开(公告)号：US10410640B2

公开(公告)日：2019-09-10

申请号：US15663019

申请日：2017-07-28

Applicant: RION Co., Ltd. ,  Inter-University Research Institute Corporation Research Organization of Information and Systems

Inventor： Nobutaka Ono ,  Masahiro Sunohara ,  Chiho Haruta

IPC: G10L19/008 ,  G10L21/0272 ,  H03H21/00 ,  H04R3/00 ,  H04R1/40 ,  H04R25/00 ,  G01S3/808

Abstract: A sound source separation apparatus includes: a separation-matrix processor that transforms a plurality of observation signals corresponding to sounds being propagated from a plurality of sound sources into a frequency-domain signal group the separation-matrix processor updating a separation matrix based on the frequency-domain signal group and transforming the updated separation matrix into time-series filter coefficients to output; a filter-coefficient transformer that partially removes non-causal components from the filter coefficients to transform the filter coefficients, and a separator that supplies the filter coefficients to a filter group, the separator generating a plurality of separation signals separated from the plurality of observation signals corresponding to the separation matrix.

公开(公告)号：US10482894B2

公开(公告)日：2019-11-19

申请号：US16279486

申请日：2019-02-19

Applicant: RION Co., Ltd.

Inventor： Masatoshi Osawa ,  Masahiro Sunohara ,  Yoichi Fujisaka ,  Yoko Fujishima

IPC: G10L21/0208 ,  G10K15/08 ,  H04R25/00 ,  G10L21/0324

Abstract: A dereverberation device includes an input instantaneous value calculation unit configured to calculate an input instantaneous value based on an input signal; a reverberation estimation unit configured to calculate a moving average of the input instantaneous value as a reverberation component; a gain calculation unit configured to calculate, with the input instantaneous value and the reverberation component, a first gain as a basic gain for the input signal; a gain suppression control unit configured to calculate, according to a ratio between the input instantaneous value and the reverberation component, a second gain changing within a range between a predetermined lower limit and a predetermined upper limit, thereby outputting a larger one of the first gain or the second gain as a third gain; and a gain processing unit configured to multiply the input signal by the third gain.

公开(公告)号：US09357315B2

公开(公告)日：2016-05-31

申请号：US14477126

申请日：2014-09-04

Applicant: RION Co., Ltd.

Inventor： Masahiro Sunohara ,  Kazuteru Nishiyama

IPC: G10K11/16 ,  H04R25/00 ,  H04R3/02

CPC classification number: H04R25/453 ,  H04R3/02 ,  H04R2225/43 ,  H04R2430/01

Abstract: A hearing aid includes: a microphone; a hearing aid processing unit configured to provide a gain to a first signal based on an output signal from the microphone to generate a second signal; a receiver configured to convert the second signal into sound; an adaptive filter configured to adaptively estimate a transfer function corresponding to a pathway from an input side of the receiver to an output side of the microphone; and a feedback removal unit configured to subtract a third signal generated based on the transfer function from the output signal of the microphone to obtain a signal and output the signal as the first signal; and a control unit configured to control the gain setting unit and an adaptive speed of the adaptive filter.

Abstract translation: 助听器包括：麦克风; 助听器处理单元，被配置为基于来自所述麦克风的输出信号向第一信号提供增益以产生第二信号; 接收器，被配置为将所述第二信号转换成声音; 自适应滤波器，被配置为自适应地估计对应于从接收器的输入侧到麦克风的输出侧的路径的传递函数; 以及反馈消除单元，被配置为从麦克风的输出信号中减去基于传递函数产生的第三信号，以获得信号并输出​​该信号作为第一信号; 以及控制单元，被配置为控制所述增益设置单元和所述自适应滤波器的自适应速度。

公开(公告)号：US09530429B2

公开(公告)日：2016-12-27

申请号：US14836332

申请日：2015-08-26

Applicant: RION CO., LTD.

Inventor： Masahiro Sunohara ,  Mariko Nakaichi

IPC: G10L21/034 ,  H04R3/00 ,  G10L21/0208

CPC classification number: G10L21/034 ,  G10L21/0208 ,  G10L2021/02082 ,  H04R3/00

Abstract: A reverberation suppression apparatus includes: an instantaneous value calculation unit that calculates an instantaneous value/instantaneous values in an envelope of values correlating with the absolute value or the square of an input signal; a reverberation estimation unit that calculates an exponential moving average of the instantaneous value(s) as an estimated reverberation component; a gain derivation unit that derives a gain corresponding to the input signal according to the estimated reverberation component and the instantaneous value(s) when the each instantaneous value is larger than the estimated reverberation component, and derives a lower limit of the gain as the gain corresponding to the input signal when the each instantaneous value is smaller than the estimated reverberation component; a smoothing unit that performs a smoothing process on the gain; and a gain processing unit that applies the gain to amplitude adjustment of the input signal thereafter.

Abstract translation: 混响抑制装置包括：瞬时值计算单元，其计算与输入信号的绝对值或平方相关的值的包络中的瞬时值/瞬时值; 将所述瞬时值的指数移动平均值计算为估计混响分量的混响估计单元; 增益导出单元，当每个瞬时值大于估计的混响分量时，根据估计的混响分量和瞬时值，导出与输入信号相对应的增益，并且将增益的下限导出为增益 当每个瞬时值小于所估计的混响分量时，对应于输入信号; 对增益进行平滑处理的平滑单元; 以及增益处理单元，此后将输入信号的增益应用于幅度调整。

公开(公告)号：US10863272B2

公开(公告)日：2020-12-08

申请号：US16418579

申请日：2019-05-21

Applicant: NATIONAL UNIVERSITY CORPORATION, IWATE UNIVERSITY ,  RION Co., Ltd.

Inventor： Kiyoshi Nishiyama ,  Masahiro Sunohara ,  Nobuhiko Hiruma ,  Chiho Haruta ,  Makoto Tateno

IPC: H04R3/00 ,  H04R3/04 ,  G10L21/0232 ,  G10L21/0208

Abstract: A system identification device for performing fast real-time identification for a system from input/output data includes a filter robust to disturbance, by setting the maximum energy gain from the disturbance to a filter error, as an evaluation criterion, smaller than a given upper limit. The filter estimates a state estimation value of a state of the system.