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1.发明申请ECHO CANCELLATION APPARATUS, ECHO CANCELLATION METHOD AND COMMUNICATIONS APPARATUS 有权ECHO CANCELLATION APPARATUS，ECHO CANCELLATION METHOD AND COMMUNICATIONS APPARATUS公开(公告)号：US20140056423A1
公开(公告)日：2014-02-27
申请号：US14110938
申请日：2013-02-07
IPC分类号： H04B3/23
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。
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公开(公告)号：US08189765B2
公开(公告)日：2012-05-29
申请号：US11822515
申请日：2007-07-06
CPC分类号： H04M9/082
摘要： A multichannel echo canceller according to the present invention includes an echo cancellation section which receives loudspeaker input signals sp1, sp2 including a second acoustic signal to be respectively inputted to a plurality of loudspeakers 10, 20 provided in a first location and detection signals m1, m2 detected by a plurality of microphones 11, 21 provided in the first location; separates a first acoustic signal and a second acoustic signal, which are included in the detection signals m1, m2, by performing signal processing based on an independent component analysis; cancels as an echo the second acoustic signal, which is included in the detection signals m1, m2, by outputting only the separated first acoustic signal to a plurality of loudspeakers 30, 40 provided in a second location.
摘要翻译： 根据本发明的多通道回波消除器包括回波消除部分，其接收扬声器输入信号sp1，sp2，包括分别输入到设置在第一位置的多个扬声器10,20的第二声信号，以及检测信号m1，m2 由设置在第一位置的多个麦克风11,21检测; 通过执行基于独立分量分析的信号处理来分离包含在检测信号m1，m2中的第一声信号和第二声信号; 通过仅将分离的第一声信号输出到设置在第二位置的多个扬声器30,40，来将包含在检测信号m1，m2中的第二声信号取回。
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公开(公告)号：US20080008333A1
公开(公告)日：2008-01-10
申请号：US11822515
申请日：2007-07-06
IPC分类号： H04B15/00
CPC分类号： H04M9/082
摘要： A multichannel echo canceller according to the present invention includes an echo cancellation section which receives loudspeaker input signals sp1, sp2 including a second acoustic signal to be respectively inputted to a plurality of loudspeakers 10, 20 provided in a first location and detection signals m1, m2 detected by a plurality of microphones 11, 21 provided in the first location; separates a first acoustic signal and a second acoustic signal, which are included in the detection signals m1, m2, by performing signal processing based on an independent component analysis; cancels as an echo the second acoustic signal, which is included in the detection signals m1, m2, by outputting only the separated first acoustic signal to a plurality of loudspeakers 30, 40 provided in a second location.
摘要翻译： 根据本发明的多通道回波消除器包括回波消除部分，其接收分别输入到设置在第一位置的多个扬声器10,20的第二声信号的扬声器输入信号sp 1，sp 2，并且检测信号m 1，m 2由设置在第一位置的多个麦克风11,21检测; 通过执行基于独立分量分析的信号处理来分离包含在检测信号m 1，m 2中的第一声信号和第二声信号; 通过仅将分离的第一声信号输出到设置在第二位置的多个扬声器30,40，来将包含在检测信号m 1，m 2中的第二声信号取回。
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公开(公告)号：US5058170A
公开(公告)日：1991-10-15
申请号：US473398
申请日：1990-02-01
CPC分类号： H04R3/005 , G10K11/341 , H04R1/406 , H04R2201/403 , H04R2201/405
摘要： An array microphone is a directional microphone having an improved directional characteric in which both the sensitivity and the sound pressure frequency response are uniform within the recording area and more particularly, the quality and level of sound remain unchanged. The array microphone includes a microphone array including a plurality of microphone units, and a two-dimensional filter for filtering an output of the microphone array in the dimensions of both time and space. When the two-dimensional filter is a digital filter and varied in its two-dimensional filter coefficient and sampling frequency, the array microphone serves as a variable directional microphone whose directional characteristic can be varied with the sound quality and level remaining unchanged throughout the recording area.
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公开(公告)号：US5633935A
公开(公告)日：1997-05-27
申请号：US225625
申请日：1994-04-11
摘要： A stereo ultradirectional microphone apparatus for detecting a sound to produce stereo sound signals, comprises: first and second ultradirectional microphones arranged side by side with a given distance in parallel for converting a sound into first and second sound signals respectively, first and second delays for delaying an output of the first and second microphones by a delay time .tau. respectively, and first and second subtractors for subtracting for subtraction between the first sound signal and an output of the second delay and subtracting for subtraction between the second sound signal and an output of the first delay. The delay time .tau. corresponds to a difference between the timings of a sound from a sound source in a direction making a clockwise angel .theta. from the front where a dead angel should be made. The subtraction provides the dead angle. Similarly, a dead angle on the side is also made to obtain a stereo characteristic. The directivity in the frequency characteristic of microphone is equalized to cancel the sensitivity in the dead angle. A stereo apparatus for forming the dead angles with two set of two filters having respective transfer characteristics determined by measurement and an adder is also disclosed.
摘要翻译： 一种用于检测声音以产生立体声信号的立体声超方向麦克风装置包括：并排布置给定距离的第一和第二超向量麦克风，用于将声音分别转换成第一和第二声音信号，用于延迟的第一和第二延迟 第一和第二麦克风的输出分别为延迟时间τ，以及第一和第二减法器，用于减去第一声音信号和第二延迟的输出之间的减法，并减去第二声音信号与第二声音信号的输出之间的减法 第一次延迟 延迟时间ττ对应于来自声源的声音的定时之间的差异，该方向从应该制造死角的前方形成顺时针方位角θ的方向。 减法提供死角。 类似地，还制造了一侧的死角以获得立体声特性。 麦克风频率特性的方向性被均衡以抵消死角的灵敏度。 还公开了一种用于通过由测量确定的具有各自的传送特性的两组滤波器和加法器形成死角的立体声装置。
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公开(公告)号：US5463618A
公开(公告)日：1995-10-31
申请号：US249888
申请日：1994-05-26
摘要： In an echo canceller, a first adaptive filter (1) estimates an impulse response of an echo path between reception and transmission side by an NLMS algorithm to synthesize a pseud echo, while a second adaptive filter (3) determines whether there is an echo path change or a double talk. A voice detector (8) detects a short time power of the received input signal (x) to determine whether far-end speech is present or absent. The voice detector controls the second adaptive filter (3) to execute adaptation of the second adaptive filter for renewal of an impulse response of an echo path when far-end speech is present and otherwise to suspend the adaptation of the second adaptive filter when far-end speech is absent, while a double talk detector (9) controls the first adaptive filter to execute or suspend adaptation of the first adaptive filter according to the determination results of the voice detector.
摘要翻译： 在回波消除器中，第一自适应滤波器（1）通过NLMS算法估计接收侧和发送侧之间的回波路径的脉冲响应以合成伪回波，而第二自适应滤波器（3）确定是否存在回波路径 改变或双重谈话。 语音检测器（8）检测接收的输入信号（x）的短时间功率，以确定是否存在远端语音。 语音检测器控制第二自适应滤波器（3）执行第二自适应滤波器的适应，以便在存在远端语音时对回波路径的脉冲响应进行更新，并且当远端语音存在时暂停第二自适应滤波器的自适应， 结束语言不存在，而双通话检测器（9）根据语音检测器的确定结果控制第一自适应滤波器来执行或暂停适应第一自适应滤波器。
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公开(公告)号：US20130156208A1
公开(公告)日：2013-06-20
申请号：US13819349
申请日：2012-02-21
申请人： Yutaka Banba , Takeo Kanamori
发明人： Yutaka Banba , Takeo Kanamori
IPC分类号： H04R25/00
CPC分类号： H04R25/30 , G10L21/0208 , G10L2021/02165 , H04R25/407 , H04R2430/03
摘要： The present invention provides a hearing aid capable of detecting contact vibration noise from a collected sound signal. A hearing aid (100) is provided with two microphones (110-1, 110-2), a vibration component extracting unit (120) which extracts from collected sound signals respectively obtained by the two microphones (110-1, 110-2) an uncorrelated component between two collected sound signals as a vibration component for each frequency band, a vibration noise identifying unit (130) which determines whether or not a contact noise occurs based on the vibration component for each frequency band extracted by the vibration component extracting unit (120), an acoustic signal processing unit (140) which, when generating an acoustic signal by hearing aid processing of the two collected sound signals, processes the acoustic signal depending on the presence or absence of the occurrence of the contact vibration noise, and a receiver (150) which converts the acoustic signal to sound.
摘要翻译： 本发明提供一种能够从收集的声音信号中检测接触振动噪声的助听器。 助听器（100）具有两个麦克风（110-1,110-2），从由两个麦克风（110-1,110-2）分别获得的收集的声音信号中提取的振动分量提取单元（120） 在两个收集的声音信号之间作为每个频带的振动分量的不相关分量，基于由振动分量提取单元提取的每个频带的振动分量来确定是否发生接触噪声的振动噪声识别单元（130） （120），声信号处理单元（140），当通过对所收集的两个声音信号进行助听处理产生声信号时，根据是否存在接触振动噪声来处理声信号，以及 接收器（150），其将声信号转换成声音。
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公开(公告)号：US08311236B2
公开(公告)日：2012-11-13
申请号：US12517406
申请日：2008-10-03
申请人： Takeo Kanamori
发明人： Takeo Kanamori
IPC分类号： H04R3/00
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。
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公开(公告)号：US06665645B1
公开(公告)日：2003-12-16
申请号：US09627071
申请日：2000-07-27
申请人： Satoru Ibaraki , Takeo Kanamori , Takashi Kawamura , Mikio Oda
发明人： Satoru Ibaraki , Takeo Kanamori , Takashi Kawamura , Mikio Oda
IPC分类号： G10L1102
CPC分类号： G10L15/20 , G10L2021/02082 , G10L2021/02161
摘要： A low-cost speech recognition apparatus for AV equipment capable of speech recognition with high accuracy while 2-channel sound is being produced from loudspeakers is achieved. A monaural conversion part converts 2-channel signals to be inputted to the loudspeakers into a monaural signal. A single echo canceller is provided with an output from a microphone and an output from the monaural conversion part (monaural signal). The echo canceller estimates an echo of multichannel sound based on the monaural signal, and then eliminates the echo sound from the microphone output. Thus, with only a single echo canceller, speech recognition can be carried out while 2-channel sound is being produced from the loudspeakers. Moreover, unlike the case where two echo cancellers are provided, the present invention can prevent the occurrence of mutual interference between the echo cancellers that leads to deterioration in speech recognition performance.
摘要翻译： 实现了一种用于AV设备的低成本语音识别装置，其能够在从扬声器产生2声道声音的同时以高精度进行语音识别。 单声道转换部分将要输入到扬声器的2声道信号转换为单声道信号。 单个回声消除器具有来自麦克风的输出和来自单声道转换部分（单声道信号）的输出。 回声消除器基于单声道信号估计多声道声音的回波，然后消除来自麦克风输出的回声。 因此，仅使用单个回声消除器，可以在从扬声器产生2声道声音的同时进行语音识别。 此外，与提供两个回波消除器的情况不同，本发明可以防止导致语音识别性能劣化的回波消除器之间的相互干扰的发生。
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公开(公告)号：US09560456B2
公开(公告)日：2017-01-31
申请号：US13819349
申请日：2012-02-21
申请人： Yutaka Banba , Takeo Kanamori
发明人： Yutaka Banba , Takeo Kanamori
IPC分类号： H04R25/00 , G10L21/0208 , G10L21/0216
CPC分类号： H04R25/30 , G10L21/0208 , G10L2021/02165 , H04R25/407 , H04R2430/03
摘要： A hearing aid capable of detecting contact vibration noise from a collected sound signal. The hearing aid is provided with two microphones, a vibration component extracting section that extracts from collected sound signals respectively obtained by the two microphones an uncorrelated component between two collected sound signals as a vibration component for each frequency band. Additionally, a vibration noise identifying section determines whether or not a contact noise occurs based on the vibration component for each frequency band extracted by the vibration component extracting section, an acoustic signal processing section, when generating an acoustic signal by hearing aid processing of the two collected sound signals, processes the acoustic signal depending on the presence or absence of the occurrence of the contact vibration noise, and a receiver converts the acoustic signal to sound.
摘要翻译： 一种能够从收集的声音信号中检测接触振动噪声的助听器。 助听器设置有两个麦克风，振动分量提取部分，从由两个麦克风分别获得的收集的声音信号中提取两个收集的声音信号之间的不相关分量作为每个频带的振动分量。 此外，振动噪声识别部分基于由振动分量提取部分提取的每个频带的振动分量来确定是否发生接触噪声，声学信号处理部分在通过辅助处理产生声学信号时确定 收集的声音信号，根据存在或不存在接触振动噪声的情况处理声信号，并且接收器将声信号转换成声音。
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