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：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。

公开(公告)号：US20110191101A1

公开(公告)日：2011-08-04

申请号：US13019835

申请日：2011-02-02

申请人： Christian Uhle ,  Oliver Hellmuth ,  Bernhard Grill ,  Falko Ridderbusch

发明人： Christian Uhle ,  Oliver Hellmuth ,  Bernhard Grill ,  Falko Ridderbusch

IPC分类号： G10L19/00

CPC分类号： G10L21/0208 ,  G10L21/0216 ,  G10L25/30

摘要： An apparatus for processing an audio signal to obtain control information for a speech enhancement filter has a feature extractor for extracting at least one feature per frequency band of a plurality of frequency bands of a short-time spectral representation of a plurality of short-time spectral representations, where the at least one feature represents a spectral shape of the short-time spectral representation in the frequency band. The apparatus additionally has a feature combiner for combining the at least one feature for each frequency band using combination parameters to obtain the control information for the speech enhancement filter for a time portion of the audio signal. The feature combiner can use a neural network regression method, which is based on combination parameters determined in a training phase for the neural network.

摘要翻译： 用于处理音频信号以获得用于语音增强滤波器的控制信息的装置具有特征提取器，用于提取多个短时频谱的短时频谱表示的多个频带中的每个频带的至少一个特征 表示，其中至少一个特征表示频带中的短时间频谱表示的频谱形状。 该装置另外具有特征组合器，用于使用组合参数来组合每个频带的至少一个特征，以获得用于音频信号的时间部分的语音增强滤波器的控制信息。 特征组合器可以使用神经网络回归方法，其基于在神经网络的训练阶段中确定的组合参数。

公开(公告)号：US09064498B2

公开(公告)日：2015-06-23

申请号：US13019835

申请日：2011-02-02

申请人： Christian Uhle ,  Oliver Hellmuth ,  Bernhard Grill ,  Falko Ridderbusch

发明人： Christian Uhle ,  Oliver Hellmuth ,  Bernhard Grill ,  Falko Ridderbusch

IPC分类号： G10L19/02 ,  G10L21/0208 ,  G10L21/0216 ,  G10L25/30

CPC分类号： G10L21/0208 ,  G10L21/0216 ,  G10L25/30

摘要： An apparatus for processing an audio signal to obtain control information for a speech enhancement filter has a feature extractor for extracting at least one feature per frequency band of a plurality of frequency bands of a short-time spectral representation of a plurality of short-time spectral representations, where the at least one feature represents a spectral shape of the short-time spectral representation in the frequency band. The apparatus additionally has a feature combiner for combining the at least one feature for each frequency band using combination parameters to obtain the control information for the speech enhancement filter for a time portion of the audio signal. The feature combiner can use a neural network regression method, which is based on combination parameters determined in a training phase for the neural network.

摘要翻译： 用于处理音频信号以获得用于语音增强滤波器的控制信息的装置具有特征提取器，用于提取多个短时频谱的短时频谱表示的多个频带中的每个频带的至少一个特征 表示，其中至少一个特征表示频带中的短时间频谱表示的频谱形状。 该装置另外具有特征组合器，用于使用组合参数来组合每个频带的至少一个特征，以获得用于音频信号的时间部分的语音增强滤波器的控制信息。 特征组合器可以使用神经网络回归方法，其基于在神经网络的训练阶段中确定的组合参数。

公开(公告)号：US20100232619A1

公开(公告)日：2010-09-16

申请号：US12681809

申请日：2008-10-01

申请人： Christian Uhle ,  Oliver Hellmuth ,  Juergen Herre ,  Harald Popp ,  Thorsten Kastner

发明人： Christian Uhle ,  Oliver Hellmuth ,  Juergen Herre ,  Harald Popp ,  Thorsten Kastner

IPC分类号： H04B3/00

CPC分类号： H04S5/005 ,  G10L19/008 ,  G10L21/0364 ,  G10L25/78

摘要： In order to generate a multi-channel signal having a number of output channels greater than a number of input channels, a mixer is used for upmixing the input signal to form at least a direct channel signal and at least an ambience channel signal. A speech detector is provided for detecting a section of the input signal, the direct channel signal or the ambience channel signal in which speech portions occur. Based on this detection, a signal modifier modifies the input signal or the ambience channel signal in order to attenuate speech portions in the ambience channel signal, whereas such speech portions in the direct channel signal are attenuated to a lesser extent or not at all. A loudspeaker signal outputter then maps the direct channel signals and the ambience channel signals to loudspeaker signals which are associated to a defined reproduction scheme, such as, for example, a 5.1 scheme.

摘要翻译： 为了产生具有大于多个输入通道的输出通道数量的多通道信号，混频器用于将输入信号上混合以形成至少直接信道信号和至少一个环境信道信号。 提供语音检测器，用于检测语音部分发生的输入信号，直接信道信号或环境信道信号的一部分。 基于该检测，信号修改器修改输入信号或环境信道信号，以便衰减环境信道信号中的语音部分，而直接信道信号中的这种语音部分被衰减到较小程度，或根本不被衰减。 然后，扬声器信号输出器将直接信道信号和环境信道信号映射到与所定义的再现方案（例如5.1方案）相关联的扬声器信号。

公开(公告)号：US08731209B2

公开(公告)日：2014-05-20

申请号：US12681809

申请日：2008-10-01

申请人： Christian Uhle ,  Oliver Hellmuth ,  Juergen Herre ,  Harald Popp ,  Thorsten Kastner

发明人： Christian Uhle ,  Oliver Hellmuth ,  Juergen Herre ,  Harald Popp ,  Thorsten Kastner

IPC分类号： H04B3/00

CPC分类号： H04S5/005 ,  G10L19/008 ,  G10L21/0364 ,  G10L25/78

摘要： In order to generate a multi-channel signal having a number of output channels greater than a number of input channels, a mixer is used for upmixing the input signal to form at least a direct channel signal and at least an ambience channel signal. A speech detector is provided for detecting a section of the input signal, the direct channel signal or the ambience channel signal in which speech portions occur. Based on this detection, a signal modifier modifies the input signal or the ambience channel signal in order to attenuate speech portions in the ambience channel signal, whereas such speech portions in the direct channel signal are attenuated to a lesser extent or not at all. A loudspeaker signal outputter then maps the direct channel signals and the ambience channel signals to loudspeaker signals which are associated to a defined reproduction scheme, such as, for example, a 5.1 scheme.

摘要翻译： 为了产生具有大于多个输入通道的输出通道数量的多通道信号，混频器用于将输入信号上混合以形成至少直接信道信号和至少一个环境信道信号。 提供语音检测器，用于检测语音部分发生的输入信号，直接信道信号或环境信道信号的一部分。 基于该检测，信号修改器修改输入信号或环境信道信号，以便衰减环境信道信号中的语音部分，而直接信道信号中的这种语音部分被衰减到较小程度，或根本不被衰减。 然后，扬声器信号输出器将直接信道信号和环境信道信号映射到与所定义的再现方案（例如5.1方案）相关联的扬声器信号。

公开(公告)号：US08346565B2

公开(公告)日：2013-01-01

申请号：US12440058

申请日：2007-10-23

申请人： Christian Uhle ,  Juergen Herre ,  Andreas Walther ,  Oliver Hellmuth ,  Christiaan Janssen

发明人： Christian Uhle ,  Juergen Herre ,  Andreas Walther ,  Oliver Hellmuth ,  Christiaan Janssen

IPC分类号： G10L19/00 ,  G10L11/00 ,  H04R5/00 ,  H03G3/00

CPC分类号： H04S5/005 ,  G10L19/008 ,  G10L19/02 ,  H04S2420/03

摘要： An apparatus for generating an ambient signal from an audio signal includes a compressor for lossy compression of a representation of the audio signal so as to obtain a compressed representation of the audio signal describing a compressed audio signal. The apparatus for generating the ambient signal further includes a calculator for calculating a difference between the compressed representation of the audio signal and the representation of the audio signal so as to obtain a discrimination representation. The apparatus further includes a provider for providing the ambient signal using the discrimination representation. An apparatus for deriving a multi-channel audio signal from an audio signal includes an apparatus for generating an ambient signal from an audio signal, an apparatus for providing the audio signal as a front-loudspeaker signal and an apparatus for providing the ambient signal as a back-loudspeaker signal.

摘要翻译： 一种用于从音频信号产生环境信号的装置包括用于对音频信号的表示进行有损压缩的压缩器，以便获得描述压缩音频信号的音频信号的压缩表示。 用于生成环境信号的装置还包括用于计算音频信号的压缩表示和音频信号的表示之间的差的计算器，以便获得鉴别表示。 该装置还包括提供者，用于使用识别表示来提供环境信号。 用于从音频信号导出多声道音频信号的装置包括用于从音频信号产生环境信号的装置，用于提供音频信号作为前置扬声器信号的装置，以及用于将环境信号提供为 后置扬声器信号。

公开(公告)号：US20100030563A1

公开(公告)日：2010-02-04

申请号：US12440058

申请日：2007-10-23

申请人： Christian Uhle ,  Juergen Herre ,  Andreas Walther ,  Oliver Hellmuth ,  Christiaan Janssen

发明人： Christian Uhle ,  Juergen Herre ,  Andreas Walther ,  Oliver Hellmuth ,  Christiaan Janssen

IPC分类号： G10L21/00

CPC分类号： H04S5/005 ,  G10L19/008 ,  G10L19/02 ,  H04S2420/03

摘要： An apparatus for generating an ambient signal from an audio signal includes a compressor for lossy compression of a representation of the audio signal so as to obtain a compressed representation of the audio signal describing a compressed audio signal. The apparatus for generating the ambient signal further includes a calculator for calculating a difference between the compressed representation of the audio signal and the representation of the audio signal so as to obtain a discrimination representation. The apparatus further includes a provider for providing the ambient signal using the discrimination representation. An apparatus for deriving a multi-channel audio signal from an audio signal includes an apparatus for generating an ambient signal from an audio signal, an apparatus for providing the audio signal as a front-loudspeaker signal and an apparatus for providing the ambient signal as a back-loudspeaker signal.

摘要翻译： 一种用于从音频信号产生环境信号的装置包括用于对音频信号的表示进行有损压缩的压缩器，以便获得描述压缩音频信号的音频信号的压缩表示。 用于生成环境信号的装置还包括用于计算音频信号的压缩表示和音频信号的表示之间的差的计算器，以便获得鉴别表示。 该装置还包括提供者，用于使用识别表示来提供环境信号。 用于从音频信号导出多声道音频信号的装置包括用于从音频信号产生环境信号的装置，用于提供音频信号作为前置扬声器信号的装置，以及用于将环境信号提供为 后置扬声器信号。

公开(公告)号：US08175730B2

公开(公告)日：2012-05-08

申请号：US12495138

申请日：2009-06-30

申请人： Christian Dittmar ,  Christian Uhle ,  Jürgen Herre

发明人： Christian Dittmar ,  Christian Uhle ,  Jürgen Herre

IPC分类号： G06F17/26 ,  G06F17/00 ,  G06F17/14 ,  G10L15/00 ,  G10L15/02 ,  G10L15/06

CPC分类号： G10L25/48

摘要： In order to analyze an information signal, a significant short-time spectrum is extracted from the information signal, the means for extracting being configured to extract such short-time spectra which come closer to a specific characteristic than other short-time spectra of the information signal. The short-time spectra extracted are then decomposed into component signals using ICA analysis, a component signal spectrum representing a profile spectrum of a tone source which generates a tone corresponding to the characteristic sought for. From a sequence of short-time spectra of the information signal and from the profile spectra determined, an amplitude envelope is eventually calculated for each profile spectrum, the amplitude envelope indicating how a profile spectrum of a tone source all in all changes over time. The profile spectra and all the amplitude envelopes associated therewith provide a description of the information signal which may be evaluated further, for example for transcription purposes in the case of a music signal.

摘要翻译： 为了分析信息信号，从信息信号中提取出显着的短时间频谱，提取装置被配置为提取比信息的其他短时间频谱更接近特定特征的短时频谱 信号。 然后，使用ICA分析将所提取的短时光谱分解为分量信号，分量信号谱表示产生与所寻求特性对应的色调的色调源的谱图。 从信息信号的短时光谱序列和所确定的谱图谱中，最终针对每个谱图计算幅度包络，幅度包络指示音源的谱图谱随时间的变化。 轮廓谱和与其相关联的所有振幅包络提供可以进一步评估的信息信号的描述，例如在音乐信号的情况下用于转录目的。

公开(公告)号：US07565213B2

公开(公告)日：2009-07-21

申请号：US11123474

申请日：2005-05-05

申请人： Christian Dittmar ,  Christian Uhle ,  Jürgen Herre

发明人： Christian Dittmar ,  Christian Uhle ,  Jürgen Herre

IPC分类号： G06F17/26 ,  G06F17/00 ,  G06F17/14 ,  G10L15/00 ,  G10L15/02 ,  G10L15/06

CPC分类号： G10L25/48

摘要： A significant short-time spectrum is extracted from an information signal, the means for extracting being configured to extract such short-time spectra which come closer to a specific characteristic than others. The short-time spectra extracted are then decomposed into component signals using ICA analysis, a component signal spectrum representing a profile spectrum of a tone source which generates a tone corresponding to the characteristic sought. From a sequence of short-time spectra of the information signal and from the profile spectra determined, an amplitude envelope is calculated for each profile spectrum to indicate how a tone source profile spectrum changes over time. The profile spectra and all the amplitude envelopes associated therewith provide a description of the information signal which may be evaluated further, for example for transcription purposes in the case of a music signal.

摘要翻译： 从信息信号中提取出显着的短时频谱，提取装置被配置为提取比其他信号更接近特定特征的短时光谱。 然后，使用ICA分析将所提取的短时频谱分解为分量信号，分量信号谱表示产生与所寻求特征对应的色调的色调源的谱图。 根据信息信号的短时间序列和所确定的谱图谱，计算每个谱图的幅度包络，以指示色调谱图谱随时间的变化。 轮廓谱和与其相关联的所有振幅包络提供可以进一步评估的信息信号的描述，例如在音乐信号的情况下用于转录目的。