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1. 发明申请

US20070258603A1 METHOD FOR ENHANCING AUDIO SIGNALS 有权
标题翻译：增强音频信号的方法
公开(公告)号：US20070258603A1
公开(公告)日：2007-11-08
申请号：US11744465
申请日：2007-05-04
申请人： Carlos Avendano , Jean Laroche , Michael M. Goodwin
发明人： Carlos Avendano , Jean Laroche , Michael M. Goodwin
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。

2. 发明授权

US06766300B1 Method and apparatus for transient detection and non-distortion time scaling 有权
标题翻译：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。

3. 发明授权

US06405163B1 Process for removing voice from stereo recordings 有权
标题翻译：从立体声录音中删除语音的过程
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。

4. 发明授权

US6084170A Optimal looping for wavetable synthesis 有权
标题翻译：波形合成的最佳循环
公开(公告)号：US6084170A
公开(公告)日：2000-07-04
申请号：US393442
申请日：1999-09-08
申请人： Jean Laroche
发明人： Jean Laroche
IPC分类号： G10H7/02 , G10H7/00 , G11C7/00
CPC分类号： G10H7/02
摘要： In accordance with the present invention, a method and apparatus are provided wherein loop discontinuities are eliminated. In the case of amplitude discontinuities, the harmonic amplitudes contained in the loop are progressively scaled over the duration of the loop, so that for each harmonic the loop end amplitude matches the loop beginning amplitude. In the case of phase discontinuities, the harmonic phases are progressively shifted over the duration of the loop, so that for each harmonic the loop end phase matches the loop beginning phase. Shifting the phase is accomplished by slightly altering the frequency of the harmonics to produce the desired amount of phase-shift at the loop end. In accordance with the present invention, the method also provides a technique to select loop begin and end points to minimize the amount of phase adjustment.
摘要翻译：根据本发明，提供了一种消除循环不连续性的方法和装置。在幅度不连续的情况下，循环中包含的谐波振幅在循环的持续时间内逐渐缩放，因此对于每个谐波，环路端振幅与环路起始幅度相匹配。在相位不连续的情况下，谐波相位在环路的持续时间内逐渐移动，因此对于每个谐波，环路端相位与环路开始相位匹配。通过稍微改变谐波的频率以在环路端产生期望量的相移来实现转换相位。根据本发明，该方法还提供一种选择循环开始和结束点以最小化相位调整量的技术。

5. 发明授权

US6049766A Time-domain time/pitch scaling of speech or audio signals with transient handling 失效
标题翻译：具有瞬态处理的语音或音频信号的时域时间/音调缩放
公开(公告)号：US6049766A
公开(公告)日：2000-04-11
申请号：US745929
申请日：1996-11-07
申请人： Jean Laroche
发明人： Jean Laroche
IPC分类号： G10L21/04 , G10L3/02 , G10L9/00
CPC分类号： G10L21/01
摘要： Method and apparatus for time-scaling and/or pitch shifting by discarding and/or repeating segments of a signal. The signal is stored as a series of samples in a memory where it is readable by one or more read pointers. Periodicity of segments of the signal is determined by evaluating normalized cross-correlation over a range of possible periods. Transients are detected by monitoring changes in rms signal value. To achieve time compression or time stretching, a segment is skipped/discarded whenever a maximum time-discrepancy between the current output and an ideal output is reached or a high periodicity is detected, a jump of the optimal length would not make this time discrepancy too high, and no transient is present in the segment to be skipped/discarded.
摘要翻译：用于通过丢弃和/或重复信号段来对时间缩放和/或音调移位的方法和装置。该信号作为一系列样本存储在存储器中，其可被一个或多个读指针读取。信号的段的周期性通过在可能的周期的范围内评估归一化的互相关来确定。通过监测有效值信号值的变化检测瞬态。为了实现时间压缩或时间延伸，每当达到当前输出和理想输出之间的最大时间差异或检测到高周期性时，跳过/丢弃一个段，最佳长度的跳跃也不会使此时间差异高，并且在要跳过/丢弃的段中不存在瞬态。

6. 发明授权

US09496850B2 Alias-free subband processing 有权
标题翻译：无别名的子带处理
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
IPC分类号： G10L19/00 , G10L21/00 , H03H17/02 , G10L19/02
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。

7. 发明授权

US08767969B1 Process for removing voice from stereo recordings 有权
标题翻译：从立体声录音中删除语音的过程
公开(公告)号：US08767969B1
公开(公告)日：2014-07-01
申请号：US10415770
申请日：2000-09-27
申请人： Jean Laroche , Tyler Brown , Alan Peevers , Robert Sussman , Mark Dolson
发明人： Jean Laroche , Tyler Brown , Alan Peevers , Robert Sussman , Mark Dolson
IPC分类号： H04R5/00 , H04S3/02
CPC分类号： H04S3/02 , H04S3/008 , H04S5/005 , H04S2400/05
摘要： A system (200) for processing a sound signal (212) that allows dynamic customization of perceived spatial positions and sound qualities of sound components associated with the sound signal (212). The system provides apparatus for processing a sound signal (212) that includes an input to receive the sound signal (212), a sound unmixer (204) coupled to the input to receive the sound signal (212) and unmix at least one sound stream (216) from the sound signal (212) based on at least one unmixing instruction (214), and an output coupled to the sound unmixer (214) to output the at least one sound stream (216).
摘要翻译：一种用于处理声音信号（212）的系统（200），所述声音信号允许对所述声音信号（212）相关联的声音分量的感知空间位置和声音质量的动态定制。该系统提供用于处理声音信号（212）的装置，该声音信号包括用于接收声音信号的输入端（212），耦合到该输入端以接收声音信号的声音混合器（204），并且混合至少一个声音流（214），基于至少一个解混合指令（214）从所述声音信号（212）输出信号（216），以及耦合到所述声音混合器（214）以输出所述至少一个声音流（216）的输出。

8. 发明申请

US20130231925A1 Monaural Noise Suppression Based on Computational Auditory Scene Analysis 有权
标题翻译：基于计算听觉场景分析的单声道噪声抑制
公开(公告)号：US20130231925A1
公开(公告)日：2013-09-05
申请号：US13859186
申请日：2013-04-09
申请人： Carlos Avendano , Jean Laroche , Michael M. Goodwin , Ludger Solbach
发明人： Carlos Avendano , Jean Laroche , Michael M. Goodwin , Ludger Solbach
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。

9. 发明授权

US08447045B1 Multi-microphone active noise cancellation system 有权
标题翻译：多麦克风主动噪声消除系统
公开(公告)号：US08447045B1
公开(公告)日：2013-05-21
申请号：US12876861
申请日：2010-09-07
申请人： Jean Laroche
发明人： Jean Laroche
IPC分类号： A61F11/06 , G10K11/16
CPC分类号： A61F11/14 , A61F2011/145 , G10K11/178 , G10K2210/1081 , G10K2210/30232 , G10K2210/3055 , G10K2210/3219
摘要： The present technology provides systems and methods for robust feedforward active noise cancellation which can overcome or substantially alleviate problems associated with the diverse and dynamic nature of the surrounding acoustic environment. A multi-faceted analysis decouples the background noise within the earpiece from the acoustic wave (e.g. the anti-noise and desired audio) generated by an audio transducer within the earpiece. A difference signal is formed utilizing monitoring signals captured by array of monitoring microphones within the earpiece. The difference signal is formed such that contributions due to the acoustic wave generated by the audio transducer are selectively attenuated. As a result, the difference signal indicates an acoustic energy level of the background noise within the earpiece.
摘要翻译：本技术提供用于稳健的前馈有源噪声消除的系统和方法，其可以克服或基本上减轻与周围声环境的多种和动态特性相关的问题。多面分析将耳机内的背景噪声与由耳机内的音频换能器产生的声波（例如抗噪声和期望音频）分离。使用由耳机内的监视麦克风阵列捕获的监视信号形成差分信号。差分信号形成为使得由音频换能器产生的声波引起的贡献被选择性地衰减。结果，差信号表示耳机内的背景噪声的声能级。

10. 发明授权

US06526325B1 Pitch-Preserved digital audio playback synchronized to asynchronous clock 有权
标题翻译：音节保留的数字音频播放与异步时钟同步
公开(公告)号：US06526325B1
公开(公告)日：2003-02-25
申请号：US09418860
申请日：1999-10-15
申请人： Robert Sussman , Jean Laroche , Mark Dolson
发明人： Robert Sussman , Jean Laroche , Mark Dolson
IPC分类号： G06F1700
CPC分类号： G10H1/0033 , G10H2240/325 , G10H2250/235 , G10L19/09 , G10L21/04
摘要： A method and apparatus for synchronizing audio to an asynchronous clock while preserving pitch utilizes a phase-vocoder to implement time-scaling without pitch-shifting.
摘要翻译：用于将音频同步到异步时钟同时保持音调的方法和装置利用相位声码器来实现无间距移位的时间缩放。

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