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公开(公告)号：US20070258603A1
公开(公告)日：2007-11-08
申请号：US11744465
申请日：2007-05-04
IPC分类号： H03G7/00
CPC分类号： H03G5/165
摘要： A frequency band of an audio input signal is analyzed to determine if a transient is present. When transients are detected, modifications are made to the intensity levels corresponding to the frequency band for a brief time period.
摘要翻译： 分析音频输入信号的频带以确定是否存在瞬态。 当检测到瞬变时，对短暂的时间段对应于频带的强度水平进行修改。
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公开(公告)号：US09496850B2
公开(公告)日：2016-11-15
申请号：US11834608
申请日：2007-08-06
申请人： Jean-Marc Jot , Martin Walsh , Jean Laroche , Mark Phillips , Michael Chorn , Michael M. Goodwin
发明人： Jean-Marc Jot , Martin Walsh , Jean Laroche , Mark Phillips , Michael Chorn , Michael M. Goodwin
CPC分类号： G10L19/0204 , G10L19/26 , H03H17/0266 , H04S2420/01
摘要： A digital signal is processed by splitting it into at least two frequency subbands and the two subband signals are downsampled. A filter is applied in at least one of the subband signals. At least one of the phase and magnitude of the subband filtered signals is matched in the transition frequency band between the two subbands.
摘要翻译： 通过将数字信号分成至少两个频率子带并对两个子带信号进行下采样来处理数字信号。 在至少一个子带信号中应用滤波器。 子带滤波信号的相位和幅度中的至少一个在两个子带之间的转换频带中匹配。
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3.发明申请公开(公告)号：US20130231925A1
公开(公告)日：2013-09-05
申请号：US13859186
申请日：2013-04-09
IPC分类号： G10L21/0208
CPC分类号： G10L21/0208 , G10L21/0272
摘要： The present technology provides a robust noise suppression system that may concurrently reduce noise and echo components in an acoustic signal while limiting the level of speech distortion. A time-domain acoustic signal may be received and be transformed to frequency-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. An acoustic signal may be reconstructed from the noise-reduced sub-band signals.
摘要翻译： 本技术提供了一种强大的噪声抑制系统，其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。 可以接收时域声信号并将其变换到频域子带信号。 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。 语音和噪声模型可以从初始语音和噪声模型中解决，并且可以对子带信号执行噪声降低。 可以从噪声降低的子带信号重构声信号。
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公开(公告)号：US08521529B2
公开(公告)日：2013-08-27
申请号：US10907851
申请日：2005-04-18
申请人： Michael M. Goodwin , Jean Laroche
发明人： Michael M. Goodwin , Jean Laroche
IPC分类号： G10L15/06
CPC分类号： G10L15/04 , G10L15/12 , G10L25/48 , G11B27/105 , G11B27/28
摘要： An input signal is converted to a feature-space representation. The feature-space representation is projected onto a discriminant subspace using a linear discriminant analysis transform to enhance the separation of feature clusters. Dynamic programming is used to find global changes to derive optimal cluster boundaries. The cluster boundaries are used to identify the segments of the audio signal.
摘要翻译： 输入信号被转换为特征空间表示。 使用线性判别分析变换将特征空间表示投影到判别子空间上，以增强特征簇的分离。 动态编程用于查找全局变化以导出最佳集群边界。 簇边界用于识别音频信号的段。
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公开(公告)号：US08750538B2
公开(公告)日：2014-06-10
申请号：US11744465
申请日：2007-05-04
CPC分类号： H03G5/165
摘要： A frequency band of an audio input signal is analyzed to determine if a transient is present. When transients are detected, modifications are made to the intensity levels corresponding to the frequency band for a brief time period.
摘要翻译： 分析音频输入信号的频带以确定是否存在瞬态。 当检测到瞬变时，对短暂的时间段对应于频带的强度水平进行修改。
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6.发明授权公开(公告)号：US08447596B2
公开(公告)日：2013-05-21
申请号：US12860043
申请日：2010-08-20
IPC分类号： G10L21/02
CPC分类号： G10L21/0208 , G10L21/0272
摘要： The present technology provides a robust noise suppression system that 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. An acoustic signal may be reconstructed from the noise-reduced sub-band signals.
摘要翻译： 本技术提供了一种强大的噪声抑制系统，其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。 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。 语音和噪声模型可以从初始语音和噪声模型中解决，并且可以对子带信号执行噪声降低。 可以从噪声降低的子带信号重构声信号。
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公开(公告)号：US08345899B2
公开(公告)日：2013-01-01
申请号：US12047285
申请日：2008-03-12
IPC分类号： H04R5/02
CPC分类号： H04S1/002 , G10L19/008 , H04S3/008
摘要： A frequency domain method for phase-amplitude matrixed surround decoding of 2-channel stereo recordings and soundtracks, based on spatial analysis of 2-D or 3-D directional cues in the recording and re-synthesis of these cues for reproduction on any headphone or loudspeaker playback system.
摘要翻译： 一种用于2声道立体声录音和声轨的相位幅度矩阵环绕解码的频域方法，基于在任何耳机上再现的这些线索的记录和重新合成中的2D或3D方向提示的空间分析， 扬声器播放系统。
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8.发明申请公开(公告)号：US20120010881A1
公开(公告)日：2012-01-12
申请号：US12860043
申请日：2010-08-20
IPC分类号： G10L21/02
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，并且可以从噪声降低的子带信号重构声信号。
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9.发明授权Method and apparatus for transient detection and non-distortion time scaling 有权用于瞬态检测和非失真时间缩放的方法和装置公开(公告)号：US06766300B1
公开(公告)日：2004-07-20
申请号：US09378377
申请日：1999-08-20
申请人： Jean Laroche
发明人： Jean Laroche
IPC分类号： G01L1900
CPC分类号： G10L21/01 , G10H1/40 , G10H2210/385
摘要： A method and apparatus for transient detection and time-scaling an audio signal detects transients and scales only intervals located between transients to avoid artifacts. In one embodiment, the transient detection process compares frequency characteristic energy between succeeding windows of the audio signal and calculates values of an energy curve where the energy increases. Transients are detected at maxima of the energy curve.
摘要翻译： 用于瞬态检测和时间缩放音频信号的方法和装置检测瞬变并仅缩放位于瞬态之间的间隔，以避免伪影。 在一个实施例中，瞬态检测过程比较音频信号的后续窗口之间的频率特性能量并计算能量增加的能量曲线的值。 在能量曲线的最大值处检测瞬态。
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公开(公告)号：US06405163B1
公开(公告)日：2002-06-11
申请号：US09405941
申请日：1999-09-27
申请人： Jean Laroche
发明人： Jean Laroche
IPC分类号： G10L1100
CPC分类号： H04S5/005 , H04S3/008 , H04S2400/05
摘要： A method and apparatus for removing or amplifying voice or other signals panned to the center of a stereo recording utilizes frequency domain techniques to calculate a frequency dependent gain factor based on the difference between the frequency domain spectra of the stereo channels.
摘要翻译： 用于去除或放大平移到立体声记录中心的语音或其他信号的方法和装置利用频域技术来基于立体声通道的频域频谱之间的差来计算频率相关增益因子。
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