公开(公告)号：US20080021703A1

公开(公告)日：2008-01-24

申请号：US11579133

申请日：2005-06-15

申请人： Takashi Kawamura ,  Takeo Kanamori

发明人： Takashi Kawamura ,  Takeo Kanamori

IPC分类号： H04R3/02

CPC分类号： H04R3/005 ,  H04R3/02

摘要： A howling detection device detects a dominance ratio, which indicates a risk of howling to be occurred when a mixed signal obtained by a sound mixing section for mixing a plurality of sound signals respectively collected by a plurality of microphones is outputted by a speaker, for each of the sound signals. The howling detection device includes a level detecting section for respectively detecting levels of the plurality of sound signals, a word ending detecting section for comparing, in a same time domain, the mixed signal with a signal regarding a sound to be outputted by the speaker as a noise reference signal, and detecting a time period, as a word ending section, during which the mixed signal is inputted after the noise reference signal falls, and a dominance ratio calculating section for extracting only any of the levels corresponding to the word ending section from among the levels, of the plurality of sound signals, detected by the level detecting section, and calculating, as a dominance ratio, a ratio of each of the levels of each of the sound signals to a sum of the levels of the plurality of sound signals.

摘要翻译： 吵音检测装置检测优势比，其表示当由扬声器输出由扬声器输出由用于混合由多个麦克风分别收集的多个声音信号的声音混合部分获得的混合信号时发生啸声的风险 的声音信号。 啸声检测装置包括用于分别检测多个声音信号的电平的电平检测部分，一个字尾结束检测部分，用于将混合信号与扬声器输出的声音相关的信号在同一时域中进行比较 噪声参考信号，并且检测在噪声参考信号下降之后输入混合信号的时间段作为字结束部分，以及优势比计算部分，用于仅提取与字结束部分相对应的任何电平 从电平检测部检测到的多个声音信号的电平之中，计算出每个声音信号的每个电平与多个声音信号的电平之和作为优势比， 声音信号。

公开(公告)号：US06931138B2

公开(公告)日：2005-08-16

申请号：US09983284

申请日：2001-10-23

申请人： Takashi Kawamura ,  Takeo Kanamori ,  Toshihide Ishimoto

发明人： Takashi Kawamura ,  Takeo Kanamori ,  Toshihide Ishimoto

IPC分类号： H04R1/40 ,  H04R3/00 ,  H04N5/76

CPC分类号： H04R3/005 ,  H04R1/406 ,  H04R2201/401 ,  H04R2201/403

摘要： A pickup section transduces sounds to audio signals. A zoom control section outputs a zoom position signal corresponding to a zoom position. A directivity control section alters the directivity characteristics under a telescopic operation so as to mainly pick up sounds coming from a frontal direction with an enhancement which is in accordance with the zoom position signal, thereby outputting an R channel audio signal and an L channel audio signal. In accordance with the zoom position signal, a noise suppression section applies a greater degree of suppression to the background noise contained in the respective channel audio signals under the telescopic operation than under a wide-angle operation. As a result, a target sound from a remote location can be picked up with a sufficient enhancement in accordance with the zoom position under the telescopic operation.

摘要翻译： 拾音部分将声音转换为音频信号。 变焦控制部输出与变焦位置对应的变焦位置信号。 指向性控制部分在伸缩操作下改变方向性特征，主要从正面方向拾取声音，并且具有与变焦位置信号相应的增强，从而输出R声道音频信号和L声道音频信号 。 根据变焦位置信号，噪声抑制部分对于在伸缩操作下的相应声道音频信号中包含的背景噪声比在广角操作下更大程度的抑制。 结果，可以根据伸缩操作下的变焦位置以足够的增强来拾取来自远程位置的目标声音。

公开(公告)号：US20140056423A1

公开(公告)日：2014-02-27

申请号：US14110938

申请日：2013-02-07

申请人： Tsuyoki Nishikawa ,  Hiroki Furukawa ,  Takeo Kanamori

发明人： Tsuyoki Nishikawa ,  Hiroki Furukawa ,  Takeo Kanamori

IPC分类号： H04B3/23

CPC分类号： H04B3/23 ,  H04M9/082 ,  H04R3/02 ,  H04R27/00

摘要： An echo cancellation apparatus cancels an echo signal included in a second speech signal including the echo signal of a first speech signal, and includes: a first echo replica generating unit generating a first echo replica by processing the first speech signal through a filter whose characteristic is equalized with a acoustic transfer function of amplified sound; a first echo cancelling unit generating and providing a first echo-cancelled signal by subtracting from the second speech signal the first echo replica generated by the first echo replica generating unit; and a filter updating unit generating a nonlinear-converted echo-cancelled signal by performing nonlinear conversion on the first echo-cancelled signal generated by the first echo cancelling unit, and updating the filter characteristic thereby equalizing the filter characteristic with the acoustic transfer function, using the nonlinear-converted echo-cancelled signal, the first speech signal, and a norm of the first speech signal.

摘要翻译： 回波消除装置消除包括第一语音信号的回波信号的第二语音信号中包括的回波信号，并且包括：第一回波复制产生单元，其通过滤波器处理第一语音信号，该滤波器的特征是 均衡放大声音的声传递函数; 第一回波消除单元，通过从第二语音信号中减去由第一回波复制产生单元生成的第一回波复制品，生成并提供第一回波消除信号; 以及滤波器更新单元，通过对由第一回波消除单元生成的第一回波消除信号进行非线性转换，生成非线性转换的回波消除信号，并且更新滤波器特性，从而利用声学传递函数来均衡滤波器特性，使用 非线性转换的回波消除信号，第一语音信号和第一语音信号的范数。

公开(公告)号：US08155345B2

公开(公告)日：2012-04-10

申请号：US12280842

申请日：2007-02-27

申请人： Junichi Tagawa ,  Takeo Kanamori

发明人： Junichi Tagawa ,  Takeo Kanamori

IPC分类号： H04R3/00 ,  H04R9/08 ,  H04R11/04 ,  H04R17/02 ,  H04R19/04 ,  H04R21/02

CPC分类号： H04R3/005

摘要： A wearable terminal is constantly worn by a user and continually picks up images and sounds from the surroundings. Even when using a directional microphone to sensitively pick up targeted audio, the wearable terminal can reduce noise occurring due to motion of the device, for example when the user is walking, and reduce the influence of a shift of the sound pickup direction. For this purpose, the wearable terminal includes a sensor for detecting motion, and performs microphone directivity control to use the directional microphone when the amount of motion is small, and to use an omnidirectional microphone that is not likely to be influenced by noise when the amount of motion is large.

摘要翻译： 穿戴式终端由用户不断佩戴，并持续从周围拾取图像和声音。 即使当使用定向麦克风来敏感地拾取目标音频时，穿戴式终端也可以减少例如当用户行走时由于设备的运动而产生的噪音，并且减少了拾音方向的偏移的影响。 为此，可穿戴式终端包括用于检测运动的传感器，并且当运动量小时执行麦克风方向性控制以使用定向麦克风，并且当量不大时使用不可能受噪声影响的全向麦克风 的运动很大。

公开(公告)号：US20120020503A1

公开(公告)日：2012-01-26

申请号：US13145415

申请日：2010-01-22

申请人： Mitsuru Endo ,  Koichiro Mizushima ,  Takeo Kanamori

发明人： Mitsuru Endo ,  Koichiro Mizushima ,  Takeo Kanamori

IPC分类号： H04R25/00

CPC分类号： G10L21/0272 ,  G10L2021/065 ,  H04R25/407 ,  H04R25/552 ,  H04R25/554 ,  H04R25/558 ,  H04R2225/43

摘要： Disclosed is a hearing aid system capable of increasing the clearness of sound spoken by a speaker while reproducing the incoming direction of the sound spoken by the speaker without using an inverse mapping rule. The hearing aid system includes a sound source input section which receives sounds coming from sound sources as input to convert the input sounds to first acoustic signals, a sound source separating section which separates the first acoustic signals converted by the sound source input section into sound source signals corresponding to the sound sources, a binaural microphone which is disposed on left and right ears, and receives the sounds coming from the sound sources as input to convert the input sounds to second acoustic signals, a directional sense component calculating section which calculates directional sense components representing the directional sense of the sound sources with the binaural microphone as a base point from the left and right second acoustic signals converted by the binaural microphone, an output signal generating section which generates left and right output acoustic signals on the basis of the sound source signals and the directional sense components, and a binaural speaker which outputs the left and right output acoustic signals generated by the output signal generating section.

摘要翻译： 公开了一种助听器系统，其能够在不使用反向映射规则的同时再现扬声器所发出的声音的输入方向，从而增加扬声器所发出的声音的清晰度。 助听器系统包括：声源输入部，其接收来自声源的声音作为输入，以将输入声音转换为第一声信号;声源分离部，其将由声源输入部转换的第一声信号分离成声源 对应于声源的信号，设置在左耳和右耳上的双耳麦克风，并且接收来自声源的声音作为输入以将输入声音转换为第二声信号;方向感知分量计算部分，其计算方向感 表示以双耳麦克风转换的左耳声和右声信号为基点的双耳麦克风的声源的方向感的分量，基于声音产生左右输出声信号的输出信号产生部分 源信号和方向感知分量，以及一个bi 输出由输出信号生成部生成的左右输出声音信号的天真的扬声器。

公开(公告)号：US07912230B2

公开(公告)日：2011-03-22

申请号：US11579133

申请日：2005-06-15

申请人： Takashi Kawamura ,  Takeo Kanamori

发明人： Takashi Kawamura ,  Takeo Kanamori

IPC分类号： H04B15/00 ,  H04R27/00

CPC分类号： H04R3/005 ,  H04R3/02

摘要： A howling detection device detects a dominance ratio, which indicates a risk of howling to occur when a mixed signal obtained by mixing a plurality of sound signals collected by a plurality of microphones is outputted by a speaker. The howling detection device detects levels of the plurality of sound signals, compares, in a same time domain, the mixed signal with a signal regarding a sound to be outputted by the speaker as a noise reference signal, detects a time period, as a word ending section, during which the mixed signal is inputted after the noise reference signal falls, and calculates a dominance ratio by extracting only a level of the plurality of sound signals corresponding to the word ending section and determining a ratio of each of the extracted levels of each of the sound signals to a sum of the extracted levels of the plurality of sound signals.

摘要翻译： 当通过由扬声器输出通过混合由多个麦克风采集的多个声音信号而获得的混合信号时，啸叫检测装置检测优势比，其表示啸叫发生的风险。 啸声检测装置检测多个声音信号的电平，将混合信号与由扬声器输出的声音相关的信号作为噪声参考信号进行比较，将时间段作为一个字 结束部分，其中混合信号在噪声参考信号下降之后被输入，并且通过仅提取对应于字结束部分的多个声音信号的电平来计算优势比，并且确定每个提取电平的比率 声音信号中的每一个与所提取的多个声音信号的电平之和。

公开(公告)号：US07760888B2

公开(公告)日：2010-07-20

申请号：US10585479

申请日：2005-06-07

申请人： Takeo Kanamori ,  Takashi Kawamura ,  Tomomi Matsuoka

发明人： Takeo Kanamori ,  Takashi Kawamura ,  Tomomi Matsuoka

IPC分类号： H04R27/00 ,  H04B15/00

CPC分类号： H04R3/02 ,  H04R27/00

摘要： Howling, which occurs when amplifying a target sound collected by a first microphone through an amplification section and outputting the amplified sound as an intensified sound from a loudspeaker, is suppressed using a first and second acoustic signal. A first power spectrum is produced according to the first acoustic signal output from the first microphone collecting a sound. A second power spectrum is produced according to the second acoustic signal of a sound including at least the intensified sound and not including the target sound. Then, the first acoustic signal is filtered based on the first power spectrum, and the second power spectrum to output only an acoustic signal of the target sound to the amplification section.

摘要翻译： 当通过放大部分放大由第一麦克风收集的目标声音并且将放大的声音作为来自扬声器的增强声音输出时发生的嚎叫被使用第一和第二声音信号抑制。 根据从第一麦克风输出的收集声音的第一声信号产生第一功率谱。 根据包括至少强化声音并且不包括目标声音的声音的第二声信号产生第二功率谱。 然后，第一声信号基于第一功率谱进行滤波，第二功率谱仅将目标声音的声信号输出到放大部。

公开(公告)号：US20100026858A1

公开(公告)日：2010-02-04

申请号：US12517406

申请日：2008-10-03

申请人： Takeo Kanamori

发明人： Takeo Kanamori

IPC分类号： H04N5/217 ,  G10K11/16

CPC分类号： H04R3/005

摘要： A noise extraction device of the present invention includes: first and second microphone units (11 and 12) each picking up a sound; a directivity synthesis unit which performs a directivity synthesis on output signals respectively received from the first and second microphone units (11 and 12) and generates two directionally synthesized signals which have: different sensitivities to noise; the same directional pattern with respect to sound pressure; and the same effective acoustic center position; and an acoustic cancellation unit which cancels an acoustic component of one of the two directionally synthesized signals by subtracting the one of the two directionally synthesized signals from the other of the two directionally synthesized signal, so as to extract a noise component.

摘要翻译： 本发明的噪声提取装置包括：每个拾取声音的第一和第二麦克风单元（11和12）; 方向性合成单元，其对从第一和第二麦克风单元（11和12）分别接收的输出信号执行方向性合成，并产生具有不同的噪声灵敏度的两个定向合成信号; 相对于声压相同的方向图; 和同样有效的声中心位置; 以及声消除单元，通过从两个定向合成信号中的另一个中减去两个定向合成信号中的一个来消除两个定向合成信号中的一个的声分量，以便提取噪声分量。

公开(公告)号：US20090169027A1

公开(公告)日：2009-07-02

申请号：US12305154

申请日：2007-05-25

申请人： Takefumi Ura ,  Takeo Kanamori

发明人： Takefumi Ura ,  Takeo Kanamori

IPC分类号： H04B3/20

CPC分类号： H04M9/082 ,  H04R3/02

摘要： It is an object of the present invention to provide an echo suppressor which is simple in construction in comparison with the conventional echo suppressor, and which can suppress echoes corresponding to the spatial transfer paths, and reduce the amount of calculations necessary to suppress echoes. The echo suppressor is operative under the condition that transfer functions corresponding to spatial transfer paths between two or more loudspeakers (105, 106) and one or more microphones (107, 108) are estimated on the basis of symmetrical arrangement of the loudspeakers (105, 106) and the microphones (107, 108). The echo suppressor includes: a target signal generating unit (111) operable to generate target signals to be used to suppress echoes which are in signals indicating sounds received by the microphones (107, 108) from the loudspeakers (105, 106); a reference signal generating unit (112) operable to generate reference signals corresponding to the target signals on the basis of signals indicating sounds to be outputted from the loudspeakers (105, 106); and an echo suppressing unit (113) operable to suppress, on the basis of the target signals and the reference signals, echoes which are in signals indicating sounds received by the microphones (107, 108).

摘要翻译： 本发明的目的是提供一种与传统的回波抑制器相比结构简单的回波抑制器，并且可以抑制与空间传送路径对应的回波，并且减少抑制回波所需的计算量。 在基于扬声器（105,106）的对称布置的基础上估计在两个或多个扬声器（105,106）和一个或多个麦克风（107,108）之间的空间传送路径的传递函数的条件下，回波抑制器可操作， 106）和麦克风（107,108）。 回波抑制器包括：目标信号生成单元，其可操作以产生要用于抑制来自扬声器（105,106）的麦克风（107,108）中接收到的表示声音的信号的回波的目标信号; 参考信号生成单元，用于根据要从扬声器（105,106）输出的声音的信号产生与目标信号对应的参考信号; 以及回波抑制单元，其可操作以基于所述目标信号和所述参考信号来抑制处于表示由所述麦克风（107,108）接收的声音的信号的回波。

公开(公告)号：US20080285774A1

公开(公告)日：2008-11-20

申请号：US10585479

申请日：2005-06-07

申请人： Takeo Kanamori ,  Takashi Kawamura ,  Tomomi Matsuoka

发明人： Takeo Kanamori ,  Takashi Kawamura ,  Tomomi Matsuoka

IPC分类号： H04B15/00 ,  H04R3/02 ,  H04R27/00

CPC分类号： H04R3/02 ,  H04R27/00

摘要： Howling, which occurs when amplifying a target sound collected by a first microphone through an amplification section and outputting the amplified sound as an intensified sound from a loudspeaker, is suppressed. A first power spectrum is produced according to a first acoustic signal output from the first microphone collecting a sound. A second power spectrum is produced according to a second acoustic signal of a sound including at least the intensified sound and not including the target sound. Then, the first acoustic signal is filtered based on the first power spectrum and the second power spectrum to output only an acoustic signal of the target sound to the amplification section.

摘要翻译： 当通过放大部分放大由第一麦克风收集的目标声音并且将放大的声音作为来自扬声器的增强声音输出时发生的啸声被抑制。 根据从第一麦克风输出的收集声音的第一声信号产生第一功率谱。 根据包括至少强化声音并且不包括目标声音的声音的第二声信号产生第二功率谱。 然后，基于第一功率谱和第二功率谱对第一声信号进行滤波，以仅将目标声音的声信号输出到放大部。