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71. 发明授权

US09036752B2 Low-delay filtering 有权
标题翻译：低延迟滤波
公开(公告)号：US09036752B2
公开(公告)日：2015-05-19
申请号：US14119933
申请日：2011-05-05
申请人： Markus Buck , Tobias Wolff
发明人： Markus Buck , Tobias Wolff
IPC分类号： H04B1/00 , H04B1/10 , H03H17/02 , H03H21/00 , G10L21/0232
CPC分类号： H04B1/10 , G10L21/0232 , H03H17/0213 , H03H21/0027
摘要： A method of frequency-domain filtering is provided that includes a plurality of filters, the plurality of filters including at least one constrained filter(s) W=I, I and at least one unconstrained filter(s) W=1,K− The method includes cascading the W k=i,K unconstrained filter(s). A single constraint window C is applied to the cascaded W=i,K unconstrained filter(s). The W=1,I constrained filter(s) are cascaded with the constrained cascaded Wk=1,K unconstrained filter(s) to form a resulting filter Wll=C(W 1{circle around (x)} . . . {circle around (x)} W){circle around (x)} W . . . W. The frequency domain representation of the single constraint window C may be based, at least in part, on a time domain representation of a single constraint window C that has been circularly shifted such that the frequency domain representation of the constraint window matches a property of the frequency domain representation of the cascaded W=1,K unconstrained filters.
摘要翻译：提供了包括多个滤波器的频域滤波的方法，所述多个滤波器包括至少一个约束滤波器W = I，I和至少一个无约束滤波器W = 1，K- 方法包括级联W k = i，K无约束滤波器。单个约束窗口C被应用于级联的W = i，K无约束滤波器。 W = 1，约束滤波器与受限级联Wk = 1，K无约束滤波器级联，以形成滤波器W11 = C（W 1 {围绕（x）}圆圈...圆圈 around（x）} W）{circle around（x）} W。。。单个约束窗口C的频域表示可以至少部分地基于已被循环移位的单个约束窗口C的时域表示，使得约束窗口的频域表示与属性的级联W = 1的频域表示，K个无约束滤波器。

72. 发明授权

US08483406B2 System for detecting and reducing noise via a microphone array 有权
公开(公告)号：US08483406B2
公开(公告)日：2013-07-09
申请号：US12843632
申请日：2010-07-26
申请人： Markus Buck , Tim Haulick
发明人： Markus Buck , Tim Haulick
IPC分类号： H04R3/00
CPC分类号： H04R29/005 , G10L21/0216 , G10L21/0232 , G10L2021/02166 , H04R3/005 , H04R2410/07 , H04R2430/20
摘要： A system for detecting noise in a signal received by a microphone array and a method for detecting noise in a signal received by a microphone array is disclosed. The system also provides for the reduction of noise in a signal received by a microphone array and a method for reducing noise in a signal received by a microphone array. The signal to noise ratio in handsfree systems may be improved, particularly in handsfree systems present in a vehicular environment.

73. 发明授权

US08364479B2 System for speech signal enhancement in a noisy environment through corrective adjustment of spectral noise power density estimations 有权
标题翻译：通过频谱噪声功率密度估计的校正调整，在噪声环境中进行语音信号增强的系统
公开(公告)号：US08364479B2
公开(公告)日：2013-01-29
申请号：US12202147
申请日：2008-08-29
申请人： Gerhard Uwe Schmidt , Tobias Wolff , Markus Buck
发明人： Gerhard Uwe Schmidt , Tobias Wolff , Markus Buck
IPC分类号： G10L21/02
CPC分类号： H04R3/00 , G10L21/0208 , G10L21/0216
摘要： A system estimates the spectral noise power density of an audio signal includes a spectral noise power density estimation unit, a correction term processor, and a combination processor. The spectral noise power density estimation unit may provide a first estimate of the spectral noise power density of the audio signal. The correction term processor may provide a time dependent correction term based, at least in part, on a spectral noise power density estimation error of the actual spectral noise power density. The correction term may be determined so that the spectral noise power density estimation error is reduced. The combination processor may combine the first estimate with the correction term to obtain a second estimate of the spectral noise power density that may be used for subsequent signal processing to enhance a desired signal component of the audio signal.
摘要翻译：系统估计音频信号的频谱噪声功率密度包括频谱噪声功率密度估计单元，校正项处理器和组合处理器。频谱噪声功率密度估计单元可以提供音频信号的频谱噪声功率密度的第一估计。校正项处理器可以至少部分地基于实际频谱噪声功率密度的频谱噪声功率密度估计误差来提供时间相关校正项。可以确定校正项，使得谱噪声功率密度估计误差降低。组合处理器可以将第一估计与校正项组合以获得可用于后续信号处理以增强音频信号的期望信号分量的频谱噪声功率密度的第二估计。

74. 发明授权

US08275145B2 Vehicle communication system 有权
标题翻译：车辆通信系统
公开(公告)号：US08275145B2
公开(公告)日：2012-09-25
申请号：US11740164
申请日：2007-04-25
申请人： Markus Buck , Tim Haulick , Gerhard Uwe Schmidt
发明人： Markus Buck , Tim Haulick , Gerhard Uwe Schmidt
IPC分类号： H04B1/00 , H04R3/00
CPC分类号： H04R27/00 , H04R2499/13 , H04S7/301 , H04S7/303
摘要： The present invention relates to a vehicle communication system comprising a plurality of microphones adapted to detect speech signals of different vehicle passengers, a mixer combining the audio signal components of the different microphones to a resulting speech output signal, a weighting unit determining the weighting of the audio signal components for the resulting speech output signal, where the weighting unit determines the weighting of the signal components based upon non-acoustical information about the presence of a vehicle passenger.
摘要翻译：车载通信系统技术领域本发明涉及一种车辆通信系统，其特征在于，包括：适合于检测不同车辆乘客的语音信号的多个麦克风;混合不同麦克风的音频信号分量与合成语音输出信号的混合器;加权单元，用于所得语音输出信号的音频信号分量，其中加权单元基于关于车辆乘客的存在的非声学信息来确定信号分量的加权。

75. 发明授权

US08194872B2 Multi-channel adaptive speech signal processing system with noise reduction 有权
标题翻译：具有降噪功能的多声道自适应语音信号处理系统
公开(公告)号：US08194872B2
公开(公告)日：2012-06-05
申请号：US11234837
申请日：2005-09-23
申请人： Markus Buck , Tim Haulick , Phillip A. Hetherington , Pierre Zakarauskas
发明人： Markus Buck , Tim Haulick , Phillip A. Hetherington , Pierre Zakarauskas
IPC分类号： A61F11/06 , H04B15/00 , H04R1/40
CPC分类号： G10L21/0208 , G10L21/0216 , G10L2021/02166 , H04R3/005 , H04R2430/25
摘要： An adaptive signal processing system eliminates noise from input signals while retaining desired signal content, such as speech. The resulting low noise output signal delivers improved clarity and intelligibility. The low noise output signal also improves the performance of subsequent signal processing systems, including speech recognition systems. An adaptive beamformer in the signal processing system consistently updates beamforming signal weights in response to changing microphone signal conditions. The adaptive weights emphasize the contribution of high energy microphone signals to the beamformed output signal. In addition, adaptive noise cancellation logic removes residual noise from the beamformed output signal based on a noise estimate derived from the microphone input signals.
摘要翻译：自适应信号处理系统消除来自输入信号的噪声，同时保留期望的信号内容，例如语音。所产生的低噪声输出信号提供了更好的清晰度和清晰度。低噪声输出信号还提高了后续信号处理系统的性能，包括语音识别系统。信号处理系统中的自适应波束形成器响应于变化的麦克风信号状况持续更新波束成形信号权重。自适应权重强调高能麦克风信号对波束形成的输出信号的贡献。此外，自适应噪声消除逻辑基于从麦克风输入信号导出的噪声估计，从波束形成的输出信号中去除残余噪声。

76. 发明授权

US08194852B2 Low complexity echo compensation system 有权
标题翻译：低复杂度回波补偿系统
公开(公告)号：US08194852B2
公开(公告)日：2012-06-05
申请号：US11955862
申请日：2007-12-13
申请人： Markus Buck , Tim Haulick , Martin Rössler , Gerhard Uwe Schmidt , Walter Schnug
发明人： Markus Buck , Tim Haulick , Martin Rössler , Gerhard Uwe Schmidt , Walter Schnug
IPC分类号： H04M9/08
CPC分类号： H04M9/082
摘要： An echo reduction system includes a signal analysis filter that converts an input into sub-band signals. A signal down-sampling circuit down-samples the sub-band signals at a first down-sampling rate. An echo analysis filter converts a loudspeaker signal into echo sub-band signal that are further processed by an echo down-sampling circuit. The circuit down-samples the echo sub-band signals at a second down-sampling rate to generate down-sampled echo sub-band signals. An echo compensation filter folds the down-sampled echo sub-band signals with an estimated impulse response of a loudspeaker-room-input system. A second echo down-sampling circuit down-samples the folded down-sampled echo sub-band signals at a third down-sampling rate to generate estimated echo sub-band signals. The first down-sampling rate is equal to the product of the second and third down-sampling rates.
摘要翻译：回波减少系统包括将输入转换为子带信号的信号分析滤波器。信号下采样电路以第一下采样率对子带信号进行下采样。回波分析滤波器将扬声器信号转换成由回波下采样电路进一步处理的回波子带信号。电路以第二次下采样率对回波子带信号进行下采样以产生下采样的回波子带信号。回波补偿滤波器用扬声器室输入系统的估计的脉冲响应折叠下采样的回波子带信号。第二回波下采样电路以三次下采样率对折叠的下采样回波子带信号进行下采样，以产生估计的回波子带信号。第一个下采样率等于第二次和第三次下采样率的乘积。

77. 发明申请

US20120009878A1 Vehicle Communication System 有权
标题翻译：车辆通信系统
公开(公告)号：US20120009878A1
公开(公告)日：2012-01-12
申请号：US13240424
申请日：2011-09-22
申请人： Markus Buck , Tim Haulick , Gerhard Uwe Schmidt , Michael Tropp
发明人： Markus Buck , Tim Haulick , Gerhard Uwe Schmidt , Michael Tropp
IPC分类号： H04W88/00
CPC分类号： H04M1/6083 , H04M9/001 , H04M2250/02 , H04R2420/07 , H04R2499/13 , H04W4/04 , H04W88/02
摘要： A vehicle communication system detects the presence of a passenger wearable communication device. The system receives audio signals from multiple sources inside or outside of a vehicle. The system processes the signals before routing the signals to multiple destinations. The destinations may include wearable personal communication devices, front and/or rear speakers, and/or a remote mobile device.
摘要翻译：车辆通信系统检测乘客可穿戴通信设备的存在。该系统从车辆内部或外部的多个源接收音频信号。在将信号路由到多个目的地之前，系统处理信号。目的地可以包括穿戴式个人通信设备，前置和/或后置扬声器和/或远程移动设备。

78. 发明申请

US20110026732A1 System for Detecting and Reducing Noise via a Microphone Array 有权
标题翻译：通过麦克风阵列检测和降低噪声的系统
公开(公告)号：US20110026732A1
公开(公告)日：2011-02-03
申请号：US12843632
申请日：2010-07-26
申请人： Markus Buck , Tim Haulick
发明人： Markus Buck , Tim Haulick
IPC分类号： H04R3/00
CPC分类号： H04R29/005 , G10L21/0216 , G10L21/0232 , G10L2021/02166 , H04R3/005 , H04R2410/07 , H04R2430/20
摘要： A system for detecting noise in a signal received by a microphone array and a method for detecting noise in a signal received by a microphone array is disclosed. The system also provides for the reduction of noise in a signal received by a microphone array and a method for reducing noise in a signal received by a microphone array. The signal to noise ratio in handsfree systems may be improved, particularly in handsfree systems present in a vehicular environment.
摘要翻译：公开了一种用于检测由麦克风阵列接收的信号中的噪声的系统和用于检测由麦克风阵列接收的信号中的噪声的方法。该系统还提供了降低由麦克风阵列接收的信号中的噪声以及用于降低由麦克风阵列接收的信号中的噪声的方法。免提系统中的信噪比可以得到改善，特别是在车辆环境中的免提系统中。

79. 发明申请

US20100215184A1 Method for Determining a Set of Filter Coefficients for an Acoustic Echo Compensator 有权
标题翻译：用于确定声学回波补偿器的滤波器系数集的方法
公开(公告)号：US20100215184A1
公开(公告)日：2010-08-26
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
IPC分类号： H04B3/20
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。

80. 发明申请

US20090125311A1 VEHICULAR VOICE CONTROL SYSTEM 审中-公开
标题翻译：车用语音控制系统
公开(公告)号：US20090125311A1
公开(公告)日：2009-05-14
申请号：US11865930
申请日：2007-10-02
申请人： Tim Haulick , Markus Buck , Marcus Hennecke
发明人： Tim Haulick , Markus Buck , Marcus Hennecke
IPC分类号： G10L11/00
CPC分类号： B60R16/0373
摘要： A vehicular voice control system includes a first and a second microphone located on a vehicle external to a vehicle cabin. The microphones receive audio signals from an audio source external to the vehicle and generate microphone output signals. A signal processor processes the microphone output signals, generates a processed signal, and determines a location of the audio source. A speech recognition system receives the processed signal and obtains a recognition result. A controller controls one or more vehicular elements based on the recognition result and the determined location of the audio source.
摘要翻译：车辆语音控制系统包括位于车辆外部的车辆上的第一和第二麦克风。麦克风从车辆外部的音频源接收音频信号，并产生麦克风输出信号。信号处理器处理麦克风输出信号，产生经处理的信号，并确定音频源的位置。语音识别系统接收经处理的信号并获得识别结果。控制器基于识别结果和确定的音频源的位置来控制一个或多个车辆元件。

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