公开(公告)号：US09646596B2

公开(公告)日：2017-05-09

申请号：US14762482

申请日：2014-01-21

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Mitsuhiro Tani ,  Mitsuru Kaitou ,  Toshiyuki Funayama

IPC: G10K11/16 ,  G10K11/175 ,  G10K11/178

CPC classification number: G10K11/175 ,  G10K11/178 ,  G10K11/17823 ,  G10K11/17835 ,  G10K2210/1282 ,  G10K2210/3016 ,  G10K2210/3039

Abstract: In an active noise reduction device, in order to solve this problem, a control block determines a level of a reference signal detected by a level detection unit. If determining that the level of the reference signal is small, the control block decreases a level of a cancel signal. This operation suppresses generation of an abnormal sound even if a level of a noise is small.

公开(公告)号：US20150063581A1

公开(公告)日：2015-03-05

申请号：US14391530

申请日：2013-06-25

Applicant: Panasonic intellectual property Management co., Ltd

Inventor： Mitsuhiro Tani ,  Toshiyuki Funayama ,  Mitsuru Kaitou

IPC: H04R3/02

CPC classification number: H04R3/02 ,  G10K11/178 ,  G10K11/17821 ,  G10K11/17854 ,  G10K11/17881 ,  G10K2210/1282 ,  G10K2210/3054 ,  G10K2210/3055 ,  H04R3/00 ,  H04R2460/01 ,  H04R2499/13

Abstract: An active noise reduction device is used with a secondary noise source that generates a secondary noise and an error signal source that outputs an error signal corresponding to a residual sound caused by interference between the secondary noise and a noise. A μ-adjustment unit calculates a step-size parameter for updating a filter coefficient of an adaptive filter by multiplying a standard step-size parameter by a ratio of a standard representative input value corresponding to amplitude of a signal to a representative input value corresponding to the amplitude of the signal.

Abstract translation: 主动噪声降低装置与产生次级噪声的次级噪声源和误差信号源一起使用，该信号源输出对应于由次级噪声和噪声之间的干扰引起的残留声音的误差信号。 μ调整单元通过将标准步长参数乘以与信号幅度对应的标准代表性输入值与对应于信号的代表性输入值的比率来计算用于更新自适应滤波器的滤波器系数的步长参数 信号的幅度。

公开(公告)号：US09596540B2

公开(公告)日：2017-03-14

申请号：US14391530

申请日：2013-06-25

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Mitsuhiro Tani ,  Toshiyuki Funayama ,  Mitsuru Kaitou

IPC: G10K11/16 ,  H03B29/00 ,  A61F11/06 ,  H04R3/02 ,  G10K11/178 ,  H04R3/00

CPC classification number: H04R3/02 ,  G10K11/178 ,  G10K11/17821 ,  G10K11/17854 ,  G10K11/17881 ,  G10K2210/1282 ,  G10K2210/3054 ,  G10K2210/3055 ,  H04R3/00 ,  H04R2460/01 ,  H04R2499/13

Abstract: An active noise reduction device is used with a secondary noise source that generates a secondary noise and an error signal source that outputs an error signal corresponding to a residual sound caused by interference between the secondary noise and a noise. A μ-adjustment unit calculates a step-size parameter for updating a filter coefficient of an adaptive filter by multiplying a standard step-size parameter by a ratio of a standard representative input value corresponding to amplitude of a signal to a representative input value corresponding to the amplitude of the signal.

Abstract translation: 主动噪声降低装置与产生次级噪声的次级噪声源和误差信号源一起使用，该信号源输出对应于由次级噪声和噪声之间的干扰引起的残留声音的误差信号。 μ调整单元通过将标准步长参数乘以与信号幅度对应的标准代表性输入值与对应于信号的代表性输入值的比率来计算用于更新自适应滤波器的滤波器系数的步长参数 信号的幅度。