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公开(公告)号：US20060165019A1
公开(公告)日：2006-07-27
申请号：US10532093
申请日：2003-09-23
Applicant: Christophe Beaugeant , Renato Beluffi , Jager Bernd , Herbert Heiss , Norbert Seitter , Luca Prati
Inventor： Christophe Beaugeant , Renato Beluffi , Jager Bernd , Herbert Heiss , Norbert Seitter , Luca Prati
IPC: H04B3/20
Abstract: An efficient reduction for the time delay during echo correction in a telecommunications network is made possible by a method for reducing an echo in uplink data (19 to 22) that are issued from a terminal (2, 3) of a telecommunications network (6, 8). A copy (25) of downlink data is created from downlink data (13) that are to be transmitted from the telecommunications network (6, 8) toward the terminal (3). Said copy (25) of downlink data is converted (transcoder 18) and used for the reduction (10) of echo in uplink data (21), whereas downlink data (13) are transmitted (6) toward the terminal (2, 3).
Abstract translation: 通过用于减少从电信网络（6）的终端（2,3）发出的上行链路数据（19至22）中的回波的方法，使电信网络中的回波校正期间的时间延迟的有效减少成为可能， 8）。 从要从电信网络（6,8）发送到终端（3）的下行链路数据（13）创建下行链路数据的副本（25）。 所述下行链路数据的副本（25）被转换（代码转换器18），并用于上行链路数据（21）中的回波的减少（10），而下行链路数据（13）向终端（2,3）发送（6） 。
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公开(公告)号：US07023986B2
公开(公告)日：2006-04-04
申请号：US10149027
申请日：2000-12-08
Applicant: Pascal Scalart , Grégoire Le Tourneur , Franck Bouteille , Christophe Beaugeant
Inventor： Pascal Scalart , Grégoire Le Tourneur , Franck Bouteille , Christophe Beaugeant
IPC: H04M1/00
CPC classification number: H04M9/082
Abstract: A terminal in a communication system includes emitting and receiving transducers and an echo processor having an adaptive echo canceler that processes a residual echo output from the adaptive echo canceler.
Abstract translation: 通信系统中的终端包括发射和接收换能器以及具有自适应回波消除器的回波处理器，其处理来自自适应回波消除器的残留回波输出。
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公开(公告)号：US08903722B2
公开(公告)日：2014-12-02
申请号：US13219750
申请日：2011-08-29
Applicant: Marco Jeub , Christoph Nelke , Christian Herglotz , Peter Vary , Christophe Beaugeant
Inventor： Marco Jeub , Christoph Nelke , Christian Herglotz , Peter Vary , Christophe Beaugeant
CPC classification number: H04R3/005 , G10L19/03 , H04R29/006 , H04R2460/01 , H04R2499/11
Abstract: A method, system, and computer program product for managing noise in a noise reduction system, comprising: receiving a first signal at a first microphone; receiving a second signal at a second microphone; identifying noise estimation in the first signal and the second signal; identifying a transfer function of the noise reduction system using a ratio of a power spectral density of the second signal minus the noise estimation to a power spectral density of the first signal, wherein the noise estimation is removed from only the power spectral density of the second signal; and identifying a gain of the noise reduction system using the transfer function.
Abstract translation: 一种用于管理降噪系统中的噪声的方法，系统和计算机程序产品，包括：在第一麦克风处接收第一信号; 在第二麦克风处接收第二信号; 识别所述第一信号和所述第二信号中的噪声估计; 使用第二信号的功率谱密度减去噪声估计与第一信号的功率谱密度的比率来识别降噪系统的传递函数，其中，仅从第二信号的功率谱密度去除噪声估计 信号; 以及使用传递函数来识别降噪系统的增益。
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公开(公告)号：US20140334620A1
公开(公告)日：2014-11-13
申请号：US13892420
申请日：2013-05-13
Applicant: Christelle Yemdji , Ludovick Lepauloux , Christophe Beaugeant , Nicholas Evans
Inventor： Christelle Yemdji , Ludovick Lepauloux , Christophe Beaugeant , Nicholas Evans
IPC: H04M3/00
CPC classification number: H04M3/002 , G10L21/0232 , G10L2021/02082 , G10L2021/02161 , G10L2021/02165 , H04B3/234 , H04M9/082 , H04R3/02 , H04R2410/05 , H04R2499/11
Abstract: A method for processing an audio signal is described comprising receiving a first audio signal via a first receiving path comprising a first microphone; receiving a second audio signal via a second receiving path comprising a second microphone; and performing echo suppression of the first audio signal based on the first audio signal and the second audio signal.
Abstract translation: 描述了一种用于处理音频信号的方法，包括经由包括第一麦克风的第一接收路径接收第一音频信号; 经由包括第二麦克风的第二接收路径接收第二音频信号; 以及基于所述第一音频信号和所述第二音频信号执行所述第一音频信号的回波抑制。
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公开(公告)号：US20130054231A1
公开(公告)日：2013-02-28
申请号：US13219750
申请日：2011-08-29
Applicant: Marco Jeub , Christoph Nelke , Christian Herglotz , Peter Vary , Christophe Beaugeant
Inventor： Marco Jeub , Christoph Nelke , Christian Herglotz , Peter Vary , Christophe Beaugeant
CPC classification number: H04R3/005 , G10L19/03 , H04R29/006 , H04R2460/01 , H04R2499/11
Abstract: A method, system, and computer program product for managing noise in a noise reduction system, comprising: receiving a first signal at a first microphone; receiving a second signal at a second microphone; identifying noise estimation in the first signal and the second signal; identifying a transfer function of the noise reduction system using a ratio of a power spectral density of the second signal minus the noise estimation to a power spectral density of the first signal, wherein the noise estimation is removed from only the power spectral density of the second signal; and identifying a gain of the noise reduction system using the transfer function.
Abstract translation: 一种用于管理降噪系统中的噪声的方法，系统和计算机程序产品，包括：在第一麦克风处接收第一信号; 在第二麦克风处接收第二信号; 识别所述第一信号和所述第二信号中的噪声估计; 使用第二信号的功率谱密度减去噪声估计与第一信号的功率谱密度的比率来识别降噪系统的传递函数，其中，仅从第二信号的功率谱密度去除噪声估计 信号; 以及使用传递函数来识别降噪系统的增益。
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Patent Agency Ranking
公开(公告)号：US07146315B2
公开(公告)日：2006-12-05
申请号：US10231613
申请日：2002-08-30
Applicant: Radu Victor Balan , Justinian Rosca , Christophe Beaugeant
Inventor： Radu Victor Balan , Justinian Rosca , Christophe Beaugeant
IPC: G10L15/20
CPC classification number: G10L25/78 , G10L2021/02165
Abstract: A multichannel source activity detection system, e.g., a voice activity detection (VAD) system, and method that exploits spatial localization of a target audio source is provided. The method includes the steps of receiving a mixed sound signal by at least two microphones; Fast Fourier transforming each received mixed sound signal into the frequency domain; filtering the transformed signals to output a signal corresponding to a spatial signature of a source; summing an absolute value squared of the filtered signal over a predetermined range of frequencies; and comparing the sum to a threshold to determine if a voice is present. Additionally, the filtering step includes multiplying the transformed signals by an inverse of a noise spectral power matrix, a vector of channel transfer function ratios, and a source signal spectral power.
Abstract translation: 提供了多通道源活动检测系统，例如语音活动检测（VAD）系统和利用目标音频源的空间定位的方法。 该方法包括通过至少两个麦克风接收混合声音信号的步骤; 将每个接收的混合声音信号快速傅里叶变换到频域; 对经变换的信号进行滤波以输出与源的空间签名相对应的信号; 在预定的频率范围内对滤波信号的绝对值进行求和; 以及将所述和与阈值进行比较以确定是否存在语音。 另外，滤波步骤包括将经变换的信号乘以噪声频谱功率矩阵的倒数，信道传递函数比的向量和源信号频谱功率。
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公开(公告)号：US09768829B2
公开(公告)日：2017-09-19
申请号：US13676142
申请日：2012-11-14
Applicant: Christelle Yemdji , Nicholas Evans , Christophe Beaugeant , Ludovick Lepauloux
Inventor： Christelle Yemdji , Nicholas Evans , Christophe Beaugeant , Ludovick Lepauloux
Abstract: A method for processing audio signals is provided comprising outputting an audio signal; receiving the output audio signal via a first receiving path as a first received audio signal; receiving the output audio signal via a second receiving path as a second received audio signal; determining an echo suppression gain based on the first received audio signal and the second received audio signal; and filtering echo suppression of the audio signal based on the first received audio signal and the echo suppression gain.
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公开(公告)号：US20130301840A1
公开(公告)日：2013-11-14
申请号：US13676142
申请日：2012-11-14
Applicant: Christelle Yemdji , Nicholas Evans , Christophe Beaugeant , Ludovick Lepauloux
Inventor： Christelle Yemdji , Nicholas Evans , Christophe Beaugeant , Ludovick Lepauloux
IPC: H04B3/20
Abstract: A method for processing audio signals is provided comprising outputting an audio signal; receiving the output audio signal via a first receiving path as a first received audio signal; receiving the output audio signal via a second receiving path as a second received audio signal; determining an echo suppression gain based on the first received audio signal and the second received audio signal; and filtering echo suppression of the audio signal based on the first received audio signal and the echo suppression gain.
Abstract translation: 提供了一种用于处理音频信号的方法，包括：输出音频信号; 经由第一接收路径接收输出音频信号作为第一接收音频信号; 经由第二接收路径接收所述输出音频信号作为第二接收音频信号; 基于所述第一接收音频信号和所述第二接收音频信号确定回波抑制增益; 并且基于第一接收到的音频信号和回波抑制增益来滤波音频信号的回波抑制。
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公开(公告)号：US08406430B2
公开(公告)日：2013-03-26
申请号：US12622388
申请日：2009-11-19
Applicant: Christophe Beaugeant , Philippe Degry
Inventor： Christophe Beaugeant , Philippe Degry
IPC: H04B3/20
CPC classification number: H04M9/082
Abstract: An apparatus may include a noise estimation unit configured to determine a noise spectrum associated with a noise signal, and generate a filter based on the determined noise spectrum. The apparatus may also include a noise synthesis unit configured to generate a colored noise using the filter generated by the noise estimation unit. The apparatus may be incorporated in an echo canceller.
Abstract translation: 一种装置可以包括：噪声估计单元，被配置为确定与噪声信号相关联的噪声谱，并且基于所确定的噪声谱产生滤波器。 该装置还可以包括噪声合成单元，其被配置为使用由噪声估计单元生成的滤波器来产生彩色噪声。 该装置可以并入回波消除器中。
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公开(公告)号：US20110116644A1
公开(公告)日：2011-05-19
申请号：US12622388
申请日：2009-11-19
Applicant: Christophe BEAUGEANT , Philippe DEGRY
Inventor： Christophe BEAUGEANT , Philippe DEGRY
IPC: H04B3/20
CPC classification number: H04M9/082
Abstract: An apparatus may include a noise estimation unit configured to determine a noise spectrum associated with a noise signal, and generate a filter based on the determined noise spectrum. The apparatus may also include a noise synthesis unit configured to generate a colored noise using the filter generated by the noise estimation unit. The apparatus may be incorporated in an echo canceller.
Abstract translation: 一种装置可以包括：噪声估计单元，被配置为确定与噪声信号相关联的噪声谱，并且基于所确定的噪声谱产生滤波器。 该装置还可以包括噪声合成单元，其被配置为使用由噪声估计单元生成的滤波器来产生彩色噪声。 该装置可以并入回波消除器中。
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