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公开(公告)号：US08660274B2
公开(公告)日：2014-02-25
申请号：US12504333
申请日：2009-07-16
申请人： Tobias Wolff , Markus Buck , Gerhard Schmidt
发明人： Tobias Wolff , Markus Buck , Gerhard Schmidt
IPC分类号： H04R3/00
CPC分类号： H04R3/005 , H04R2430/20 , H04R2430/23
摘要： Embodiments of the present invention relate to methods, systems, and computer program products for signal processing. A first plurality of microphone signals is obtained by a first microphone array. A second plurality of microphone signals is obtained by a second microphone array different from the first microphone array. The first plurality of microphone signals is beamformed by a first beamformer comprising beamforming weights to obtain a first beamformed signal. The second plurality of microphone signals is beamformed by a second beamformer comprising the same beamforming weights as the first beamformer to obtain a second beamformed signal. The beamforming weights are adjusted such that the power density of echo components and/or noise components present in the first and second plurality of microphone signals is substantially reduced.
摘要翻译： 本发明的实施例涉及用于信号处理的方法，系统和计算机程序产品。 第一麦克风信号由第一麦克风阵列获得。 通过与第一麦克风阵列不同的第二麦克风阵列获得第二多个麦克风信号。 第一组多个麦克风信号由包括波束成形权重的第一波束形成器波束形成，以获得第一波束形成信号。 第二组麦克风信号由包括与第一波束形成器相同的波束形成权重的第二波束形成器波束形成，以获得第二波束形成信号。 调整波束成形权重使得第一和第二多个麦克风信号中存在的回波分量和/或噪声分量的功率密度显着降低。
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公开(公告)号：US08194500B2
公开(公告)日：2012-06-05
申请号：US12547681
申请日：2009-08-26
CPC分类号： G01S3/8083
摘要： A method of locating a sound source based on sound received at an array of microphones comprises the steps of determining a correlation function of signals provided by microphones of the array and establishing a direction in which the sound source is located based on at least one eigenvector of a matrix having matrix elements which are determined based on the correlation function. The correlation function has first and second frequency components associated with a first and second frequency band, respectively. The first frequency component is determined based on signals from microphones having a first distance, and the second frequency component is determined based on signals from microphones having a second distance different from the first distance.
摘要翻译： 基于在麦克风阵列处接收到的声音来定位声源的方法包括以下步骤：确定由阵列的麦克风提供的信号的相关函数，并基于至少一个本征向量建立声源所在的方向 具有基于相关函数确定的矩阵元素的矩阵。 相关函数分别具有与第一和第二频带相关联的第一和第二频率分量。 基于来自具有第一距离的麦克风的信号确定第一频率分量，并且基于来自具有不同于第一距离的第二距离的麦克风的信号来确定第二频率分量。
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公开(公告)号：US08675890B2
公开(公告)日：2014-03-18
申请号：US12742907
申请日：2008-11-17
IPC分类号： H04R3/00
CPC分类号： H04R29/00 , G10L21/0272 , G10L2021/02166 , H04R3/005
摘要： The present invention relates to a method for localizing a sound source, in particular, a human speaker, comprising detecting sound generated by the sound source by means of a microphone array comprising more than two microphones and obtaining microphone signals, one for each of the microphones, selecting from the microphone signals a pair of microphone signals for a predetermined frequency range based on the distance of the microphones to each other and estimating the angle of the inci-dence of the sound on the microphone array based on the selected pair of micro-phone signals.
摘要翻译： 本发明涉及一种用于定位声源，特别是人类扬声器的方法，包括通过包括两个以上麦克风的麦克风阵列检测声源产生的声音并获得麦克风信号，每个麦克风 基于麦克风彼此的距离，从麦克风选择一个麦克风信号达到预定频率范围，并基于所选择的一对微型麦克风估计麦克风阵列上的声音的角度， 电话信号。
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54.发明授权Method for determining a noise reference signal for noise compensation and/or noise reduction 有权用于确定用于噪声补偿和/或降噪的噪声参考信号的方法公开(公告)号：US08374358B2
公开(公告)日：2013-02-12
申请号：US12749066
申请日：2010-03-29
申请人： Markus Buck , Tobias Wolff , Toby Christian Lawin-Ore , Samuel Ngouoko Mboungueng , Gerhard Schmidt
发明人： Markus Buck , Tobias Wolff , Toby Christian Lawin-Ore , Samuel Ngouoko Mboungueng , Gerhard Schmidt
CPC分类号： G10K11/002 , G10L21/0208 , G10L2021/02165 , G10L2021/02166 , H04R3/005 , H04R2499/13
摘要： The invention provides a method for determining a noise reference signal for noise compensation and/or noise reduction. A first audio signal on a first signal path and a second audio signal on a second signal path are received. The first audio signal is filtered using a first adaptive filter to obtain a first filtered audio signal. The second audio signal is filtered using a second adaptive filter to obtain a second filtered audio signal. The first and the second filtered audio signal are combined to obtain the noise reference signal. The first and the second adaptive filter are adapted such as to minimize a wanted signal component in the noise reference signal.
摘要翻译： 本发明提供了一种用于确定用于噪声补偿和/或降噪的噪声参考信号的方法。 接收第一信号路径上的第一音频信号和第二信号路径上的第二音频信号。 使用第一自适应滤波器对第一音频信号进行滤波，以获得第一滤波音频信号。 使用第二自适应滤波器对第二音频信号进行滤波，以获得第二滤波音频信号。 第一和第二滤波音频信号被组合以获得噪声参考信号。 第一和第二自适应滤波器适于使噪声参考信号中的有用信号分量最小化。
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公开(公告)号：US20100054085A1
公开(公告)日：2010-03-04
申请号：US12547681
申请日：2009-08-26
CPC分类号： G01S3/8083
摘要： A method of locating a sound source based on sound received at an array of microphones comprises the steps of determining a correlation function of signals provided by microphones of the array and establishing a direction in which the sound source is located based on at least one eigenvector of a matrix having matrix elements which are determined based on the correlation function. The correlation function has first and second frequency components associated with a first and second frequency band, respectively. The first frequency component is determined based on signals from microphones having a first distance, and the second frequency component is determined based on signals from microphones having a second distance different from the first distance.
摘要翻译： 基于在麦克风阵列处接收到的声音来定位声源的方法包括以下步骤：确定由阵列的麦克风提供的信号的相关函数，并基于至少一个本征向量建立声源所在的方向 具有基于相关函数确定的矩阵元素的矩阵。 相关函数分别具有与第一和第二频带相关联的第一和第二频率分量。 基于来自具有第一距离的麦克风的信号确定第一频率分量，并且基于来自具有不同于第一距离的第二距离的麦克风的信号来确定第二频率分量。
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公开(公告)号：US20100014690A1
公开(公告)日：2010-01-21
申请号：US12504333
申请日：2009-07-16
申请人： Tobias Wolff , Markus Buck , Gerhard Schmidt
发明人： Tobias Wolff , Markus Buck , Gerhard Schmidt
IPC分类号： H04R3/00
CPC分类号： H04R3/005 , H04R2430/20 , H04R2430/23
摘要： Embodiments of the present invention relate to methods, systems, and computer program products for signal processing. A first plurality of microphone signals is obtained by a first microphone array. A second plurality of microphone signals is obtained by a second microphone array different from the first microphone array. The first plurality of microphone signals is beamformed by a first beamformer comprising beamforming weights to obtain a first beamformed signal. The second plurality of microphone signals is beamformed by a second beamformer comprising the same beamforming weights as the first beamformer to obtain a second beamformed signal. The beamforming weights are adjusted such that the power density of echo components and/or noise components present in the first and second plurality of microphone signals is substantially reduced.
摘要翻译： 本发明的实施例涉及用于信号处理的方法，系统和计算机程序产品。 第一麦克风信号由第一麦克风阵列获得。 通过与第一麦克风阵列不同的第二麦克风阵列获得第二多个麦克风信号。 第一组多个麦克风信号由包括波束成形权重的第一波束形成器波束形成，以获得第一波束形成信号。 第二组麦克风信号由包括与第一波束形成器相同的波束形成权重的第二波束形成器波束形成，以获得第二波束形成信号。 调整波束成形权重使得第一和第二多个麦克风信号中存在的回波分量和/或噪声分量的功率密度显着降低。
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57.发明授权Method for determining a set of filter coefficients for an acoustic echo compensator 有权用于确定声学回声补偿器的滤波器系数集合的方法公开(公告)号：US08787560B2
公开(公告)日：2014-07-22
申请号：US12708172
申请日：2010-02-18
申请人： Markus Buck , Gerhard Schmidt , Tobias Wolff
发明人： Markus Buck , Gerhard Schmidt , Tobias Wolff
CPC分类号： H04R3/002 , G10L2021/02082 , H04M9/082 , H04R1/406 , H04R3/005 , H04R2430/20
摘要： The invention provides a method for determining a set of filter coefficients for an acoustic echo compensator in a beamformer arrangement. The acoustic echo compensator compensates for echoes within the beamformed signal. A plurality of sets of filter coefficients for the acoustic echo compensator is provided. Each set of filter coefficients corresponds to one of a predetermined number of steering directions of the beamformer arrangement. The predetermined number of steering directions is equal to or greater than the number of microphones in the microphone array. For a current steering direction, a current set of filter coefficients for the acoustic echo compensator is determined based on the provided sets of filter coefficients.
摘要翻译： 本发明提供一种用于确定波束形成器布置中的声学回波补偿器的滤波器系数集合的方法。 声回波补偿器补偿波束形成信号内的回波。 提供了用于声学回声补偿器的多组滤波器系数。 每组滤波器系数对应于波束形成器装置的预定数量的转向方向之一。 预定数量的转向方向等于或大于麦克风阵列中的麦克风的数量。 对于当前的转向方向，基于所提供的滤波器系数集合来确定用于声学回声补偿器的当前一组滤波器系数。
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公开(公告)号：US20110019835A1
公开(公告)日：2011-01-27
申请号：US12742907
申请日：2008-11-17
CPC分类号： H04R29/00 , G10L21/0272 , G10L2021/02166 , H04R3/005
摘要： The present invention relates to a method for localizing a sound source, in particular, a human speaker, comprising detecting sound generated by the sound source by means of a microphone array comprising more than two microphones and obtaining microphone signals, one for each of the microphones, selecting from the microphone signals a pair of microphone signals for a predetermined frequency range based on the distance of the microphones to each other and estimating the angle of the incidence of the sound on the microphone array based on the selected pair of microphone signals.
摘要翻译： 本发明涉及一种用于定位声源，特别是人类扬声器的方法，包括通过包括两个以上麦克风的麦克风阵列检测声源产生的声音并获得麦克风信号，每个麦克风 基于麦克风彼此的距离，基于所选择的一对麦克风信号估计麦克风阵列上的声音的入射角度，从麦克风选择一个麦克风信号达到预定频率范围。
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59.发明申请Method for Determining a Noise Reference Signal for Noise Compensation and/or Noise Reduction 有权确定用于噪声补偿和/或降噪的噪声参考信号的方法公开(公告)号：US20100246851A1
公开(公告)日：2010-09-30
申请号：US12749066
申请日：2010-03-29
申请人： Markus Buck , Tobias Wolff , Toby Christian Lawin-Ore , Samuel Ngouoko Mboungueng , Gerhard Schmidt
发明人： Markus Buck , Tobias Wolff , Toby Christian Lawin-Ore , Samuel Ngouoko Mboungueng , Gerhard Schmidt
IPC分类号： H04B15/00
CPC分类号： G10K11/002 , G10L21/0208 , G10L2021/02165 , G10L2021/02166 , H04R3/005 , H04R2499/13
摘要： The invention provides a method for determining a noise reference signal for noise compensation and/or noise reduction. A first audio signal on a first signal path and a second audio signal on a second signal path are received. The first audio signal is filtered using a first adaptive filter to obtain a first filtered audio signal. The second audio signal is filtered using a second adaptive filter to obtain a second filtered audio signal. The first and the second filtered audio signal are combined to obtain the noise reference signal. The first and the second adaptive filter are adapted such as to minimize a wanted signal component in the noise reference signal.
摘要翻译： 本发明提供了一种用于确定用于噪声补偿和/或降噪的噪声参考信号的方法。 接收第一信号路径上的第一音频信号和第二信号路径上的第二音频信号。 使用第一自适应滤波器对第一音频信号进行滤波，以获得第一滤波音频信号。 使用第二自适应滤波器对第二音频信号进行滤波，以获得第二滤波音频信号。 第一和第二滤波音频信号被组合以获得噪声参考信号。 第一和第二自适应滤波器适于使噪声参考信号中的有用信号分量最小化。
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公开(公告)号：US20130325458A1
公开(公告)日：2013-12-05
申请号：US13990176
申请日：2010-11-29
申请人： Markus Buck , Timo Matheja , Achim Eichentopf
发明人： Markus Buck , Timo Matheja , Achim Eichentopf
IPC分类号： G10L21/0208
CPC分类号： G10L21/0208 , H03G3/3005 , H04R3/005 , H04R2430/01 , H04R2430/03
摘要： A system and method of signal combining that supports different speakers in a noisy environment is provided. Particularly for deviations in the noise characteristics among the channels, various embodiments ensure a smooth transition of the background noise at speaker changes. A modified noise reduction (NR) may achieve equivalent background noise characteristics for all channels by applying a dynamic, channel specific, and frequency dependent maximum attenuation. The reference characteristics for adjusting the background noise may be specified by the dominant speaker channel. In various embodiments, an automatic gain control (AGC) with a dynamic target level may ensure similar speech signal levels in all channels.
摘要翻译： 提供了在嘈杂环境中支持不同扬声器的信号组合系统和方法。 特别是对于通道之间的噪声特性的偏差，各种实施例确保扬声器变化时背景噪声的平滑过渡。 修改的噪声降低（NR）可以通过应用动态，信道特定和频率相关的最大衰减来实现所有信道的等效背景噪声特性。 用于调整背景噪声的参考特性可以由主扬声器通道指定。 在各种实施例中，具有动态目标电平的自动增益控制（AGC）可以确保所有信道中的类似语音信号电平。
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