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1. 发明授权

US09473866B2 System and method for tracking sound pitch across an audio signal using harmonic envelope 有权
公开(公告)号：US09473866B2
公开(公告)日：2016-10-18
申请号：US14089729
申请日：2013-11-25
申请人： THE INTELLISIS CORPORATION
发明人： David C. Bradley , Rodney Gateau , Daniel S. Goldin , Robert N. Hilton , Nicholas K. Fisher
IPC分类号： G06F15/00 , G10L25/00 , G10L19/00 , G10L21/00 , G10L25/90 , G10L19/12 , G10L21/04 , H04R29/00
CPC分类号： H04R29/00 , G10L25/90 , G10L2025/906
摘要： A system and method may be configured to analyze audio information derived from an audio signal. The system and method may track sound pitch across the audio signal. The tracking of pitch across the audio signal may take into account change in pitch by determining at individual time sample windows in the signal duration an estimated pitch and a representation of harmonic envelope at the estimated pitch. The estimated pitch and the representation of harmonic envelope may then be implemented to determine an estimated pitch for another time sample window in the signal duration with an enhanced accuracy and/or precision.

2. 发明申请

US20160099012A1 ESTIMATING PITCH USING SYMMETRY CHARACTERISTICS 有权
标题翻译：使用对称特征估计点
公开(公告)号：US20160099012A1
公开(公告)日：2016-04-07
申请号：US14969022
申请日：2015-12-15
申请人： The Intellisis Corporation
发明人： David C. Bradley , Yao Huang Morin , Sean O'Connor
IPC分类号： G10L25/90 , G10L25/06
CPC分类号： G10L25/90 , G10L21/0264 , G10L25/00 , G10L25/06 , G10L25/15 , G10L2025/906
摘要： An estimate of a pitch of a signal may be computed by using correlations of frequency portions of a frequency representation of the signal. An initial pitch estimate may be obtained and frequency portions of the frequency representation may be identified using multiples of the initial pitch estimate. Correlations of the frequency portions may be computed, and a score for the initial pitch estimate may be determined using the correlations. A second pitch estimate may be determined using the first score, and the process may be repeated.
摘要翻译：可以通过使用信号的频率表示的频率部分的相关性来计算信号的音调的估计。可以获得初始音调估计，并且可以使用初始音调估计的倍数来识别频率表示的频率部分。可以计算频率部分的相关性，并且可以使用相关性来确定初始音调估计的得分。可以使用第一分数来确定第二音调估计，并且可以重复该过程。

3. 发明授权

US09485597B2 System and method of processing a sound signal including transforming the sound signal into a frequency-chirp domain 有权
公开(公告)号：US09485597B2
公开(公告)日：2016-11-01
申请号：US14040418
申请日：2013-09-27
申请人： THE INTELLISIS CORPORATION
发明人： David C. Bradley , Daniel S. Goldin , Robert N. Hilton , Nicholas K. Fisher , Rodney Gateau , Derrick R. Roos , Eric Wiewiora
IPC分类号： G10L15/00 , G10L15/06 , G10L13/00 , G10L13/08 , G10L21/00 , G10L25/00 , G10L19/02 , G10L25/90 , G10L21/02 , G10L15/20 , G10L17/00 , G06F17/27 , H04R29/00 , G10L25/03 , G10L25/27 , H04R3/02 , H04B15/00 , G10L15/02 , G10L17/02 , G10L21/0208 , G10L25/51 , G10L25/93 , G10L25/15 , G10L21/0232
CPC分类号： H04R29/00 , G10L15/02 , G10L17/02 , G10L21/0208 , G10L21/0232 , G10L25/03 , G10L25/15 , G10L25/27 , G10L25/51 , G10L25/90 , G10L25/93 , G10L2025/906
摘要： A system and method may be configured to process an audio signal. The system and method may track pitch, chirp rate, and/or harmonic envelope across the audio signal, may reconstruct sound represented in the audio signal, and/or may segment or classify the audio signal. A transform may be performed on the audio signal to place the audio signal in a frequency chirp domain that enhances the sound parameter tracking, reconstruction, and/or classification.

4. 发明申请

US20160232925A1 ESTIMATING PITCH USING PEAK-TO-PEAK DISTANCES 有权
标题翻译：估计使用峰值到峰值的距离
公开(公告)号：US20160232925A1
公开(公告)日：2016-08-11
申请号：US14969038
申请日：2015-12-15
申请人： The Intellisis Corporation
发明人： David C. Bradley , Yao Huang Morin , Ellisha Marongelli
IPC分类号： G10L25/90 , G10L25/18
CPC分类号： G10L25/90 , G10L25/18
摘要： An estimate of a pitch of a signal may be computed by using peak-to-peak distances in a frequency representation of the signal. A frequency representation of the signal may be computed, peaks in the frequency representation may be identified, for example, by identifying peaks larger than a threshold value. Peak-to-peak distances may be determined using the locations in frequency of the peaks. The pitch of the signal may be estimated by, for example, estimating cumulative distribution function of the peak-to-peak distances or computing a histogram of the peak-to-peak distances.
摘要翻译：可以通过在信号的频率表示中使用峰 - 峰距离来计算信号的音调的估计。可以计算信号的频率表示，例如，可以通过识别大于阈值的峰值来识别频率表示中的峰值。可以使用峰值频率中的位置来确定峰间距离。可以通过例如估计峰 - 峰距离的累积分布函数或计算峰 - 峰距离的直方图来估计信号的间距。

5. 发明申请

US20160232919A1 ESTIMATION OF NOISE CHARACTERISTICS 有权
标题翻译：噪声特征估计
公开(公告)号：US20160232919A1
公开(公告)日：2016-08-11
申请号：US14860999
申请日：2015-09-22
申请人： The Intellisis Corporation
发明人： David C. Bradley
IPC分类号： G10L21/0332 , G10L21/0264 , G10L21/0232
CPC分类号： G10L21/0216 , G10L21/0264
摘要： Devices, systems and methods are disclosed for estimating characteristics of noise included in one-dimensional data. For example, a number of data points associated with noise below each of a plurality of thresholds may be determined to calculate a cumulative distribution function. A probability density function may be derived from the cumulative distribution function. A variance may be calculated from the cumulative distribution function and/or the probability density function. The noise may be modeled using the variance and other characteristics determined from the cumulative distribution function and/or the probability density function.
摘要翻译：公开了用于估计包括在一维数据中的噪声特性的装置，系统和方法。例如，可以确定与多个阈值中的每一个以下的噪声相关联的多个数据点，以计算累积分布函数。可以从累积分布函数导出概率密度函数。可以从累积分布函数和/或概率密度函数计算方差。可以使用从累积分布函数和/或概率密度函数确定的方差和其他特征来建模噪声。

6. 发明授权

US09177561B2 Systems and methods for reconstructing an audio signal from transformed audio information 有权
公开(公告)号：US09177561B2
公开(公告)日：2015-11-03
申请号：US14593238
申请日：2015-01-09
申请人： The Intellisis Corporation
发明人： David C. Bradley , Daniel S. Goldin , Robert N. Hilton , Nicholas K. Fisher , Rodney Gateau
IPC分类号： G10L19/00 , G10L21/0208 , G10L21/00 , G10L13/00 , G10L21/0232 , G10L25/90 , G10L25/93 , G10L25/45 , H04R29/00
CPC分类号： G10L19/00 , G10L13/00 , G10L21/00 , G10L21/0208 , G10L21/0232 , G10L25/45 , G10L25/90 , G10L25/93 , H03G5/005 , H03G5/165 , H04R29/00
摘要： A system and method may be configured to reconstruct an audio signal from transformed audio information. The audio signal may be resynthesized based on individual harmonics and corresponding pitches determined from the transformed audio information. Noise may be subtracted from the transformed audio information by interpolating across peak points and across trough points of harmonic pitch paths through the transformed audio information, and subtracting values associated with the trough point interpolations from values associated with the peak point interpolations. Noise between harmonics of the sound may be suppressed in the transformed audio information by centering functions at individual harmonics in the transformed audio information, the functions serving to suppress noise between the harmonics.

7. 发明授权

US09058820B1 Identifying speech portions of a sound model using various statistics thereof 有权
标题翻译：使用其各种统计信息识别声音模型的语音部分
公开(公告)号：US09058820B1
公开(公告)日：2015-06-16
申请号：US13899264
申请日：2013-05-21
申请人： The Intellisis Corporation
发明人： Massimo Mascaro , David C. Bradley
IPC分类号： G10L19/00 , G10L21/0272 , G10L15/187 , G10L15/26
CPC分类号： G10L25/93 , G10L15/187 , G10L15/26 , G10L15/265 , G10L21/0208 , G10L21/12 , G10L21/14
摘要： Speech portions of a sound model may be identified using various statistics associated with the sound model for voice enhancement of noisy audio signals. A spectral motion transform may be performed on an input signal to obtain a linear fit in time of a sound model of the input signal. Statistics may be extracted from the linear fit of the sound model of the input signal. Speech portions of the linear fit of the sound model of the input signal may be identified by detecting a presence of harmonics as a function of time in the linear fit of the sound model of the input signal based on individual ones of the extracted statistics. An output signal may be provided that conveys audio comprising a reconstructed speech component of the input signal with a noise component of the input signal being suppressed.
摘要翻译：可以使用与用于噪声音频信号的语音增强的声音模型相关联的各种统计来识别声音模型的语音部分。可以对输入信号执行频谱运动变换，以在输入信号的声音模型的时间内获得线性拟合。可以从输入信号的声音模型的线性拟合中提取统计量。输入信号的声音模型的线性拟合的语音部分可以通过基于所提取的统计中的各个来检测在输入信号的声音模型的线性拟合中作为时间的函数的谐波的存在来识别。可以提供输出信号，该输出信号传送包括输入信号的重构语音分量的音频，其中输入信号的噪声分量被抑制。

8. 发明申请

US20160232924A1 ESTIMATING FRACTIONAL CHIRP RATE WITH MULTIPLE FREQUENCY REPRESENTATIONS 有权
标题翻译：用多个频率表示估计分数
公开(公告)号：US20160232924A1
公开(公告)日：2016-08-11
申请号：US14969036
申请日：2015-12-15
申请人： The Intellisis Corporation
发明人： David C. Bradley , Yao Huang Morin , Janis Intoy , Sean O'Connor , Nick Hilton , Massimo Mascaro
IPC分类号： G10L25/90 , G10L17/26 , G10L25/06 , G10L25/18 , G10L21/0308 , G10L17/02 , G10L15/18
CPC分类号： G10L25/90 , G10L15/02 , G10L17/02 , G10L21/0208 , G10L25/03 , G10L25/06 , G10L25/18 , G10L25/27 , G10L25/51
摘要： An estimate of a fractional chirp rate of a signal may be computed by using multiple frequency representations of the signal. A first frequency representation may be computed using a first fractional chirp rate and a first score may be computed using the first frequency representation that indicates a match between the first fractional chirp rate and a fractional chirp rate of the signal. A second frequency representation may be computed using a second fractional chirp rate and a second score may be computed using the second frequency representation that indicates a match between the second fractional chirp rate and the fractional chirp rate of the signal. The fractional chirp rate of the signal may be estimated using the first score and the second score, for example, by selecting a fractional chirp rate corresponding to a highest score.
摘要翻译：可以通过使用信号的多个频率表示来计算信号的分数啁啾率的估计。可以使用第一分数啁啾率来计算第一频率表示，并且可以使用指示第一分数啁啾率和信号的分数啁啾率之间的匹配的第一频率表示来计算第一分数。可以使用第二分数啁啾率来计算第二频率表示，并且可以使用指示第二分数啁啾率和信号的分数啁啾率之间的匹配的第二频率表示来计算第二分数。可以使用第一分数和第二分数来估计信号的分数啁啾率，例如通过选择对应于最高分数的分数啁啾率。

9. 发明申请

US20160232917A1 HARMONIC FEATURE PROCESSING FOR REDUCING NOISE 有权
标题翻译：用于减少噪声的谐波特征处理
公开(公告)号：US20160232917A1
公开(公告)日：2016-08-11
申请号：US15016801
申请日：2016-02-05
申请人： The Intellisis Corporation
发明人： David C. Bradley , Yao Huang Morin
IPC分类号： G10L21/0232 , G10L21/0388 , G10L25/90 , G10L21/0264 , G10L15/20
CPC分类号： G10L21/038 , G10L15/02 , G10L17/02 , G10L21/0205 , G10L21/0208 , G10L21/0232 , G10L21/0264 , G10L21/0388 , G10L25/18 , G10L25/90
摘要： Devices, systems and methods are disclosed for reducing noise in input data by performing a hysteresis operation followed by a lateral excitation smoothing operation. For example, an audio signal may be represented as a sequence of feature vectors. A row of the sequence of feature vectors may, for example, be associated with the same harmonic of the audio signal at different points in time. To determine portions of the row that correspond to the harmonic being present, the system may compare an amplitude to a low threshold and a high threshold and select a series of data points that are above the low threshold and include at least one data point above the high threshold. The system may iteratively perform a spreading technique, spreading a center value of a center data point in a kernel to neighboring data points in the kernel, to further reduce noise.
摘要翻译：公开了用于通过执行滞后操作，随后进行横向激励平滑操作来减少输入数据中的噪声的装置，系统和方法。例如，音频信号可以表示为特征向量序列。特征向量序列的一行可以例如在不同的时间点与音频信号的相同谐波相关联。为了确定与存在的谐波相对应的行的部分，系统可以将幅度与低阈值和高阈值进行比较，并且选择高于低阈值的一系列数据点，并且包括至少一个数据点高门槛。系统可以迭代地执行扩展技术，将内核中的中心数据点的中心值扩展到内核中的相邻数据点，以进一步减少噪声。

10. 发明申请

US20160232906A1 DETERMINING FEATURES OF HARMONIC SIGNALS 有权
标题翻译：确定谐波信号的特征
公开(公告)号：US20160232906A1
公开(公告)日：2016-08-11
申请号：US14969029
申请日：2015-12-15
申请人： The Intellisis Corporation
发明人： David C. Bradley , Yao Huang Morin , Massimo Mascaro , Janis I. Intoy , Sean O'Connor , Ellisha Marongelli , Nick Hilton
IPC分类号： G10L19/038 , G10L17/26 , G10L25/45 , G10L17/02
CPC分类号： G10L25/90 , G10L15/02 , G10L17/02 , G10L21/02
摘要： Features that may be computed from a harmonic signal include a fractional chirp rate, a pitch, and amplitudes of the harmonics. A fractional chirp rate may be estimated, for example, by computing scores corresponding to different fractional chirp rates and selecting a highest score. A first pitch may be computed from a frequency representation that is computed using the estimated fractional chirp rate, for example, by using peak-to-peak distances in the frequency distribution. A second pitch may be computed using the first pitch, and a frequency representation of the signal, for example, by using correlations of portions of the frequency representation. Amplitudes of harmonics of the signal may be determined using the estimated fractional chirp rate and second pitch. Any of the estimated fractional chirp rate, second pitch, and harmonic amplitudes may be used for further processing, such as speech recognition, speaker verification, speaker identification, or signal reconstruction.
摘要翻译：可以从谐波信号计算的特征包括分数啁啾率，音调和谐波的振幅。可以例如通过计算对应于不同分数啁啾率的分数并选择最高分数来估计分数啁啾率。可以从使用估计的分数啁啾率计算的频率表示来计算第一音调，例如通过使用频率分布中的峰 - 峰距离。可以使用第一音调和例如通过使用频率表示的部分的相关性来对信号进行频率表示来计算第二音高。可以使用估计的分数啁啾率和第二音调来确定信号的谐波幅度。任何估计的分数啁啾率，第二音调和谐波幅度都可用于进一步处理，例如语音识别，说话人验证，说话者识别或信号重构。

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