公开(公告)号：US08873764B2

公开(公告)日：2014-10-28

申请号：US13272243

申请日：2011-10-13

申请人： Fabian Kuech ,  Markus Kallinger ,  Markus Schmidt ,  Meray Zourub ,  Marco Diatschuk ,  Oliver Moser

发明人： Fabian Kuech ,  Markus Kallinger ,  Markus Schmidt ,  Meray Zourub ,  Marco Diatschuk ,  Oliver Moser

IPC分类号： H04B3/20 ,  H04M9/08

CPC分类号： H04M9/082 ,  H04R3/02 ,  H04S2420/03 ,  H04S2420/11

摘要： An acoustic echo suppression unit according to an embodiment of the present invention includes and input interface for extracting a downmix signal from an input signal, the input signal including the downmix signal and parametric side information, wherein the downmix and the parametric side information together represent a multichannel signal, a calculator for calculating filter coefficients for an adaptive filter, wherein the calculator is adapted to determine the filter coefficients based on the downmix signal and a microphone signal or a signal derived from the microphone signal, and an adaptive filter adapted to filter the microphone signal or the signal derived from the microphone signal based on the filter coefficients to suppress an echo caused by the multichannel signal in the microphone signal.

摘要翻译： 根据本发明实施例的声学回声抑制单元包括用于从输入信号中提取降混信号的输入接口，该输入信号包括下混合信号和参数侧信息，其中下混合和参数侧信息一起表示一个 多通道信号，用于计算自适应滤波器的滤波器系数的计算器，其中所述计算器适于基于所述下混合信号和麦克风信号或从所述麦克风信号导出的信号来确定滤波器系数，以及自适应滤波器， 麦克风信号或基于滤波器系数从麦克风信号导出的信号，以抑制由麦克风信号中的多声道信号引起的回波。

公开(公告)号：US20120076308A1

公开(公告)日：2012-03-29

申请号：US13272243

申请日：2011-10-13

申请人： Fabian KUECH ,  Markus KALLINGER ,  Markus SCHMIDT ,  Meray ZOURUB ,  Marco DIATSCHUK ,  Oliver MOSER

发明人： Fabian KUECH ,  Markus KALLINGER ,  Markus SCHMIDT ,  Meray ZOURUB ,  Marco DIATSCHUK ,  Oliver MOSER

IPC分类号： H04R5/00 ,  H04B3/20

CPC分类号： H04M9/082 ,  H04R3/02 ,  H04S2420/03 ,  H04S2420/11

摘要： An acoustic echo suppression unit according to an embodiment of the present invention includes and input interface for extracting a downmix signal from an input signal, the input signal including the downmix signal and parametric side information, wherein the downmix and the parametric side information together represent a multichannel signal, a calculator for calculating filter coefficients for an adaptive filter, wherein the calculator is adapted to determine the filter coefficients based on the downmix signal and a microphone signal or a signal derived from the microphone signal, and an adaptive filter adapted to filter the microphone signal or the signal derived from the microphone signal based on the filter coefficients to suppress an echo caused by the multichannel signal in the microphone signal.

摘要翻译： 根据本发明实施例的声学回声抑制单元包括用于从输入信号中提取降混信号的输入接口，该输入信号包括下混合信号和参数侧信息，其中下混合和参数侧信息一起表示一个 多通道信号，用于计算自适应滤波器的滤波器系数的计算器，其中所述计算器适于基于所述下混合信号和麦克风信号或从所述麦克风信号导出的信号来确定滤波器系数，以及自适应滤波器， 麦克风信号或基于滤波器系数从麦克风信号导出的信号，以抑制由麦克风信号中的多声道信号引起的回波。

公开(公告)号：US20090080666A1

公开(公告)日：2009-03-26

申请号：US12055787

申请日：2008-03-26

申请人： Christian Uhle ,  Juergen Herre ,  Stefan Geyersberger ,  Falko Ridderbusch ,  Andreas Walter ,  Oliver Moser

发明人： Christian Uhle ,  Juergen Herre ,  Stefan Geyersberger ,  Falko Ridderbusch ,  Andreas Walter ,  Oliver Moser

IPC分类号： H04R5/04

CPC分类号： H04R5/04

摘要： An apparatus for extracting an ambient signal from an input audio signal comprises a gain-value determinator configured to determine a sequence of time-varying ambient signal gain values for a given frequency band of the time-frequency distribution of the input audio signal in dependence on the input audio signal. The apparatus comprises a weighter configured to weight one of the sub-band signals representing the given frequency band of the time-frequency-domain representation with the time-varying gain values, to obtain a weighted sub-band signal. The gain-value determinator is configured to obtain one or more quantitative feature-values describing one or more features of the input audio signal and to provide the gain-value as a function of the one or more quantitative feature values such that the gain values are quantitatively dependent on the quantitative values. The gain value determinator is configured to determine the gain values such that ambience components are emphasized over non-ambience components in the weighted sub-band signal.

摘要翻译： 一种用于从输入音频信号中提取环境信号的装置包括：增益值确定器，被配置为根据输入音频信号的时间 - 频率分布的给定频带来确定时变环境信号增益值的序列，依赖于 输入音频信号。 该装置包括被配置为将表示时间 - 频域表示的给定频带的子带信号中的一个与时变增益值加权的权重器，以获得加权子带信号。 增益值确定器被配置为获得描述输入音频信号的一个或多个特征的一个或多个定量特征值，并且将增益值提供为一个或多个定量特征值的函数，使得增益值为 定量依赖于定量值。 增益值确定器被配置为确定增益值，使得氛围分量在加权子带信号中的非环境分量上被强调。

公开(公告)号：US1244557A

公开(公告)日：1917-10-30

申请号：US15054217

申请日：1917-02-23

申请人： HARRY A BIRD ,  THOMAS J CAMP ,  SIMON GEIST ,  MORRIS BLOOM ,  THOMAS H TIDDY ,  OLIVER MOSER H ,  PRESTON A VOUGHT ,  SNYDER CHARLES P

发明人： SNYDER CHARLES P

CPC分类号： F16H61/0262

公开(公告)号：US1196820A

公开(公告)日：1916-09-05

申请号：US6755315

申请日：1915-12-18

申请人： HARRY A BIRD ,  THOMAS J CAMP ,  SIMON GEIST ,  MORRIS BLOOM ,  THOMAS H TIDDY ,  OLIVER MOSER H ,  PRESTON A VOUGHT ,  SNYDER CHARLES P

发明人： SNYDER CHARLES P

CPC分类号： F16H61/0262

公开(公告)号：US08588427B2

公开(公告)日：2013-11-19

申请号：US12055787

申请日：2008-03-26

申请人： Christian Uhle ,  Juergen Herre ,  Stefan Geyersberger ,  Falko Ridderbusch ,  Andreas Walter ,  Oliver Moser

发明人： Christian Uhle ,  Juergen Herre ,  Stefan Geyersberger ,  Falko Ridderbusch ,  Andreas Walter ,  Oliver Moser

IPC分类号： H04R5/00

CPC分类号： H04R5/04

摘要： An apparatus for extracting an ambient signal from an input audio signal comprises a gain-value determinator configured to determine a sequence of time-varying ambient signal gain values for a given frequency band of the time-frequency distribution of the input audio signal in dependence on the input audio signal. The apparatus comprises a weighter configured to weight one of the sub-band signals representing the given frequency band of the time-frequency-domain representation with the time-varying gain values, to obtain a weighted sub-band signal. The gain-value determinator is configured to obtain one or more quantitative feature-values describing one or more features of the input audio signal and to provide the gain-value as a function of the one or more quantitative feature values such that the gain values are quantitatively dependent on the quantitative values. The gain value determinator is configured to determine the gain values such that ambience components are emphasized over non-ambience components in the weighted sub-band signal.

摘要翻译： 一种用于从输入音频信号中提取环境信号的装置包括：增益值确定器，被配置为根据输入音频信号的时间 - 频率分布的给定频带来确定时变环境信号增益值的序列，依赖于 输入音频信号。 该装置包括被配置为将表示时间 - 频域表示的给定频带的子带信号中的一个与时变增益值加权的权重器，以获得加权子带信号。 增益值确定器被配置为获得描述输入音频信号的一个或多个特征的一个或多个定量特征值，并且将增益值提供为一个或多个定量特征值的函数，使得增益值为 定量依赖于定量值。 增益值确定器被配置为确定增益值，使得氛围分量在加权子带信号中的非环境分量上被强调。