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1. 发明申请

WO2007081916A3 SYSTEM AND METHOD FOR UTILIZING INTER-MICROPHONE LEVEL DIFFERENCES FOR SPEECH ENHANCEMENT 审中-公开
标题翻译：用于语音增强的内部麦克风等级差异的系统和方法
公开(公告)号：WO2007081916A3
公开(公告)日：2007-12-21
申请号：PCT/US2007000463
申请日：2007-01-05
申请人： AUDIENCE INC , AVENDANO CARLOS , SANTOS PETER
发明人： AVENDANO CARLOS , SANTOS PETER
IPC分类号： H04R25/00
CPC分类号： H04R3/002 , G10L21/0208 , H04R1/406 , H04R3/005 , H04R2410/01 , H04R2430/20 , H04R2499/11
摘要： Systems and methods for utilizing inter-microphone level differences to attenuate noise and enhance speech are provided. In exemplary embodiments, energy estimates of acoustic signals received by a primary microphone and a secondary microphone are determined in order to determine an inter-microphone level difference (ILD). This ILD in combination with a noise estimate based only on a primary microphone acoustic signal allow a filter estimate to be derived. In some embodiments, the derived filter estimate may be smoothed. The filter estimate is then applied to the acoustic signal from the primary microphone to generate a speech estimate.
摘要翻译：提供了利用麦克风间差异来衰减噪声和增强语音的系统和方法。在示例性实施例中，确定由主麦克风和次麦克风接收的声信号的能量估计，以便确定麦克风间级差（ILD）。该ILD与仅基于主麦克风声信号的噪声估计结合使得能够导出滤波器估计。在一些实施例中，导出的滤波器估计可以被平滑。然后将滤波器估计值应用于来自主麦克风的声信号以产生语音估计。

2. 发明申请

WO2011068901A1 AUDIO ZOOM 审中-公开
标题翻译：音频变焦
公开(公告)号：WO2011068901A1
公开(公告)日：2011-06-09
申请号：PCT/US2010/058600
申请日：2010-12-01
申请人： AUDIENCE, INC. , AVENDANO, Carlos , SOLBACH, Ludger
发明人： AVENDANO, Carlos , SOLBACH, Ludger
IPC分类号： H04R3/00
CPC分类号： H04R3/005 , H04M1/03 , H04R2430/20 , H04R2430/21
摘要： An audio equivalent of a video zoom feature for video recording and communication applications, as well as video post production processes. The audio zoom may operate in conjunction with a video zoom feature or independently. The audio zoom may be achieved by controlling reverberation effects of a signal, controlling a gain of the signal, as well as controlling the width of a directional beam from which is used to select the particular audio component to focus on. The audio zoom may operate in response to user input, such as a user selection of a particular direction, or automatically based on a current environment or other factors.
摘要翻译：与视频录制和通信应用的视频缩放功能的音频等同物，以及视频后期制作过程。音频变焦可以与视频缩放功能一起使用或独立操作。可以通过控制信号的混响效应，控制信号的增益以及控制用于选择特定音频分量来聚焦的定向波束的宽度来实现音频变焦。音频变焦可以响应于诸如用户对特定方向的选择或者基于当前环境或其他因素的用户输入来操作。

3. 发明申请

WO2011137258A1 MULTI-MICROPHONE ROBUST NOISE SUPPRESSION 审中-公开
标题翻译：多麦克风强力噪声抑制
公开(公告)号：WO2011137258A1
公开(公告)日：2011-11-03
申请号：PCT/US2011/034373
申请日：2011-04-28
申请人： AUDIENCE, INC. , EVERY, Mark , AVENDANO, Carlos , SOLBACH, Ludger , JIANG, Ye , MURGIA, Carlo
发明人： EVERY, Mark , AVENDANO, Carlos , SOLBACH, Ludger , JIANG, Ye , MURGIA, Carlo
IPC分类号： G10L21/02
CPC分类号： H04R3/002 , G10L21/0208 , G10L21/0232 , G10L2021/02082 , G10L2021/02166
摘要： A robust noise reduction system may concurrently reduce noise and echo components in an acoustic signal while limiting the level of speech distortion. The system may receive acoustic signals from two or more microphones in a close-talk, hand-held or other configuration. The received acoustic signals are transformed to cochlea domain sub-band signals and echo and noise components may be subtracted from the sub-band signals. Features in the acoustic sub-band signals are identified and used to generate a multiplicative mask. The multiplicative mask is applied to the noise subtracted sub-band signals and the sub-band signals are reconstructed in the time domain.
摘要翻译：鲁棒的降噪系统可以同时降低声信号中的噪声和回波分量，同时限制语音失真的水平。系统可以以紧密通话，手持式或其他配置从两个或更多个麦克风接收声信号。接收到的声信号被变换为耳蜗域子带信号，并且可以从子带信号中减去回波和噪声分量。识别声学子带信号中的特征并用于产生乘法掩模。将乘法掩码应用于噪声减去的子带信号，并且在时域中重构子带信号。

4. 发明申请

WO2011094232A1 ADAPTIVE NOISE REDUCTION USING LEVEL CUES 审中-公开
标题翻译：自适应噪音减少使用水平
公开(公告)号：WO2011094232A1
公开(公告)日：2011-08-04
申请号：PCT/US2011/022462
申请日：2011-01-25
申请人： AUDIENCE, INC. , MURGIA, Carlo , AVENDANO, Carlos , YOUNES, Karim , EVERY, Mark , JIANG, Ye
发明人： MURGIA, Carlo , AVENDANO, Carlos , YOUNES, Karim , EVERY, Mark , JIANG, Ye
IPC分类号： A61F11/06
CPC分类号： G10K11/16 , H04R3/005
摘要： An array of microphones utilizes two sets of two microphones for noise suppression. A primary microphone and secondary microphone of the three microphones may be positioned closely spaced to each other to provide acoustic signals used to achieve noise cancellation. A tertiary microphone may be spaced with respect to either the primary microphone or the secondary microphone in a spread-microphone configuration for deriving level cues from audio signals provided by tertiary and the primary or secondary microphone. The level cues are expressed via an inter-microphone level difference (ILD) which is used to determine one or more cluster tracking control signals. The ILD based cluster tracking signals are used to control the adaptation of null-processing noise cancellation modules. A noise cancelled primary acoustic signal and ILD based cluster tracking control signals are used during post filtering to adaptively generate a mask to be applied against a speech estimate signal.
摘要翻译：一组麦克风使用两组麦克风进行噪声抑制。三个麦克风的主麦克风和次麦克风可以彼此紧密地定位，以提供用于实现噪声消除的声信号。第三麦克风可以在扩展麦克风配置中相对于主麦克风或辅助麦克风间隔开，以从由三级麦克风和主麦克风或辅助麦克风提供的音频信号导出电平提示。通过用于确定一个或多个集群跟踪控制信号的麦克风间级差（ILD）来表示电平提示。基于ILD的群集跟踪信号用于控制空处理噪声消除模块的适应。在后滤波期间使用噪声消除的主声信号和基于ILD的群集跟踪控制信号来自适应地生成针对语音估计信号应用的掩码。

5. 发明申请

WO2010077361A1 SYSTEMS AND METHODS FOR RECONSTRUCTING DECOMPOSED AUDIO SIGNALS 审中-公开
标题翻译：用于重构分解音频信号的系统和方法
公开(公告)号：WO2010077361A1
公开(公告)日：2010-07-08
申请号：PCT/US2009/006754
申请日：2009-12-30
申请人： AUDIENCE, INC. , AVENDANO, Carlos , SOLBACH, Ludger
发明人： AVENDANO, Carlos , SOLBACH, Ludger
IPC分类号： G10L19/00
CPC分类号： G10L19/0204 , G10L25/18
摘要： Systems and methods for reconstructing decomposed audio signals are presented. In exemplary embodiments, a decomposed audio signal is received. The decomposed audio signal may include a plurality of sub-band signals having successively shifted group delays as a function of frequency from a filter bank. The plurality of sub-band signals may then be grouped into two or more groups. A delay function may be applied to at least one of the two or more groups. Subsequently, the groups may be combined to reconstruct the audio signal, which may be outputted accordingly.
摘要翻译：提出了重建分解音频信号的系统和方法。在示例性实施例中，接收分解的音频信号。分解的音频信号可以包括具有作为来自滤波器组的频率的函数的连续移位的组延迟的多个子带信号。然后可以将多个子带信号分组为两个或更多个组。延迟功能可以应用于两个或更多个组中的至少一个。随后，可以组合组以重建可相应地输出的音频信号。

6. 发明申请

WO2008045476A3 SYSTEM AND METHOD FOR UTILIZING OMNI-DIRECTIONAL MICROPHONES FOR SPEECH ENHANCEMENT 审中-公开
标题翻译：用于语音增强的OMNI-DIRECTIONAL MICROPHONES的系统和方法
公开(公告)号：WO2008045476A3
公开(公告)日：2008-07-24
申请号：PCT/US2007021654
申请日：2007-10-09
申请人： AUDIENCE INC , AVENDANO CARLOS
发明人： AVENDANO CARLOS
IPC分类号： H04R25/00
CPC分类号： H04R5/027 , H04R3/005
摘要： Systems and methods for utilizing inter-microphone level differences (ILD) to attenuate noise and enhance speech are provided. In exemplary embodiments, primary and secondary acoustic signals are received by omni-directional microphones, and converted into primary and secondary electric signals. A differential microphone array module processes the electric signals to determine a cardioid primary signal and a cardioid secondary signal. The cardioid signals are filtered through a frequency analysis module which takes the signals and mimics a cochlea implementation (i.e., cochlear domain). Energy levels of the signals are then computed, and the results are processed by an ILD module using a non-linear combination to obtain the ILD. In exemplary embodiments, the non-linear combination comprises dividing the energy level associated with the primary microphone by the energy level associated with the secondary microphone. The ILD is utilized by a noise reduction system to enhance the speech of the primary acoustic signal.
摘要翻译：提供了利用麦克风间差分（ILD）来衰减噪声和增强语音的系统和方法。在示例性实施例中，一次和二次声信号由全向麦克风接收，并被转换成一次和二次电信号。差分麦克风阵列模块处理电信号以确定心形主信号和心二次信号。心脏信号通过频率分析模块进行滤波，频率分析模块接收信号并模拟耳蜗实现（即，耳蜗域）。然后计算信号的能级，并且使用非线性组合由ILD模块处理结果以获得ILD。在示例性实施例中，非线性组合包括将与主麦克风相关联的能级除以与辅助麦克风相关联的能级。噪声降低系统利用ILD来增强主声信号的语音。

7. 发明申请

WO2012009047A1 MONAURAL NOISE SUPPRESSION BASED ON COMPUTATIONAL AUDITORY SCENE ANALYSIS 审中-公开
标题翻译：基于计算机语音场景分析的单声道噪声抑制
公开(公告)号：WO2012009047A1
公开(公告)日：2012-01-19
申请号：PCT/US2011/037250
申请日：2011-05-19
申请人： AUDIENCE, INC. , AVENDANO, Carlos , LAROCHE, Jean , GOODWIN, Michael, M. , SOLBACH, Ludger
发明人： AVENDANO, Carlos , LAROCHE, Jean , GOODWIN, Michael, M. , SOLBACH, Ludger
IPC分类号： H04B15/00
CPC分类号： G10L21/0208 , G10L21/0272
摘要： The present technology provides a robust noise suppression system which may concurrently reduce noise and echo components in an acoustic signal while limiting the level of speech distortion. An acoustic signal may be received and transformed to cochlear domain sub-band signals. Features such as pitch may be identified and tracked within the sub-band signals. Initial speech and noise models may be then be estimated at least in part from a probability analysis based on the tracked pitch sources. Speech and noise models may be resolved from the initial speech and noise models and noise reduction may be performed on the sub-band signals and an acoustic signal may be reconstructed from the noise-reduced sub-band signals.
摘要翻译：本技术提供了鲁棒的噪声抑制系统，其可以在限制语音失真水平的同时降低声信号中的噪声和回声分量。可以接收声信号并将其变换为耳蜗域子带信号。可以在子带信号内识别和跟踪诸如音调的特征。可以至少部分地基于跟踪的音调源的概率分析来估计初始语音和噪声模型。可以从初始语音和噪声模型中解析语音和噪声模型，并且可以对子带信号执行噪声降低，并且可以从减少噪声的子带信号重建声学信号。

8. 发明申请

WO2011133405A1 METHOD FOR JOINTLY OPTIMIZING NOISE REDUCTION AND VOICE QUALITY IN A MONO OR MULTI-MICROPHONE SYSTEM 审中-公开
标题翻译：在单声道或多麦克风系统中优化噪声降低和语音质量的方法
公开(公告)号：WO2011133405A1
公开(公告)日：2011-10-27
申请号：PCT/US2011/032578
申请日：2011-04-14
申请人： AUDIENCE, INC. , EVERY, Mark , AVENDANO, Carlos
发明人： EVERY, Mark , AVENDANO, Carlos
IPC分类号： H04B15/00
CPC分类号： G10L21/0232 , G10L21/0208 , G10L25/18 , G10L2021/02087 , H04R3/002
摘要： The present technology provides adaptive noise reduction of an acoustic signal using a sophisticated level of control to balance the tradeoff between speech loss distortion and noise reduction. The energy level of a noise component in a sub-band signal of the acoustic signal is reduced based on an estimated signal-to-noise ratio of the sub-band signal, and further on an estimated threshold level of speech distortion in the sub-band signal. In embodiments, the energy level of the noise component in the sub-band signal may be reduced to no less than a residual noise target level. Such a target level may be defined as a level at which the noise component ceases to be perceptible.
摘要翻译：本技术使用复杂的控制水平来提供声信号的自适应降噪，以平衡语音丢失失真和噪声降低之间的权衡。基于子带信号的估计信噪比减小声信号的子带信号中的噪声分量的能级，并且还基于子带信号的估计的语音失真阈值水平，频带信号。在实施例中，子带信号中的噪声分量的能级可以减小到不小于残余噪声目标电平。这样的目标水平可以被定义为噪声分量不再可察觉的水平。

9. 发明申请

WO2008045476A2 SYSTEM AND METHOD FOR UTILIZING OMNI-DIRECTIONAL MICROPHONES FOR SPEECH ENHANCEMENT 审中-公开
标题翻译：用于增强语音的全向麦克风的系统和方法
公开(公告)号：WO2008045476A2
公开(公告)日：2008-04-17
申请号：PCT/US2007/021654
申请日：2007-10-09
申请人： AUDIENCE, INC. , AVENDANO, Carlos
发明人： AVENDANO, Carlos
IPC分类号： H04R25/00
CPC分类号： H04R5/027 , H04R3/005
摘要： Systems and methods for utilizing inter-microphone level differences (ILD) to attenuate noise and enhance speech are provided. In exemplary embodiments, primary and secondary acoustic signals are received by omni-directional microphones, and converted into primary and secondary electric signals. A differential microphone array module processes the electric signals to determine a cardioid primary signal and a cardioid secondary signal. The cardioid signals are filtered through a frequency analysis module which takes the signals and mimics a cochlea implementation (i.e., cochlear domain). Energy levels of the signals are then computed, and the results are processed by an ILD module using a non-linear combination to obtain the ILD. In exemplary embodiments, the non-linear combination comprises dividing the energy level associated with the primary microphone by the energy level associated with the secondary microphone. The ILD is utilized by a noise reduction system to enhance the speech of the primary acoustic signal.
摘要翻译：提供了利用麦克风间电平差（ILD）来衰减噪声并增强语音的系统和方法。在示例性实施例中，初级和次级声学信号由全向麦克风接收，并被转换为初级和次级电信号。差分麦克风阵列模块处理电信号以确定心形主信号和心形次级信号。心音信号通过频率分析模块进行滤波，频率分析模块接收信号并模仿耳蜗实施（即耳蜗区域）。然后计算信号的能量水平，并通过ILD模块使用非线性组合来处理结果以获得ILD。在示例性实施例中，非线性组合包括将与主要麦克风关联的能量水平除以与次要麦克风关联的能量水平。 ILD被降噪系统利用来增强主要声音信号的语音。

10. 发明申请

WO2007081916A2 SYSTEM AND METHOD FOR UTILIZING INTER-MICROPHONE LEVEL DIFFERENCES FOR SPEECH ENHANCEMENT 审中-公开
标题翻译：利用用于增强语音的内部麦克风电平差异的系统和方法
公开(公告)号：WO2007081916A2
公开(公告)日：2007-07-19
申请号：PCT/US2007/000463
申请日：2007-01-05
申请人： AUDIENCE, INC. , AVENDANO, Carlos , SANTOS, Peter
发明人： AVENDANO, Carlos , SANTOS, Peter
IPC分类号： H04R3/00 , H04R1/02
CPC分类号： H04R3/002 , G10L21/0208 , H04R1/406 , H04R3/005 , H04R2410/01 , H04R2430/20 , H04R2499/11
摘要： Systems and methods for utilizing inter-microphone level differences to attenuate noise and enhance speech are provided. In exemplary embodiments, energy estimates of acoustic signals received by a primary microphone and a secondary microphone are determined in order to determine an inter-microphone level difference (ILD). This ILD in combination with a noise estimate based only on a primary microphone acoustic signal allow a filter estimate to be derived. In some embodiments, the derived filter estimate may be smoothed. The filter estimate is then applied to the acoustic signal from the primary microphone to generate a speech estimate.
摘要翻译：提供了利用麦克风间电平差异来衰减噪声并增强语音的系统和方法。在示例性实施例中，确定由主麦克风和次麦克风接收的声学信号的能量估计，以确定麦克风间水平差（ILD）。这种ILD与仅基于主要麦克风声学信号的噪声估计结合允许导出滤波器估计。在一些实施例中，导出的滤波器估计可以被平滑。然后将滤波器估计应用于来自主麦克风的声学信号以生成语音估计。

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