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1. 发明授权

US07242762B2 Monitoring and control of an adaptive filter in a communication system 有权
标题翻译：监测和控制通信系统中的自适应滤波器
公开(公告)号：US07242762B2
公开(公告)日：2007-07-10
申请号：US10178427
申请日：2002-06-24
申请人： Perry P. He , Roger A. Smith , Lucio F. C. Pessoa , Roman A. Dyba
发明人： Perry P. He , Roger A. Smith , Lucio F. C. Pessoa , Roman A. Dyba
IPC分类号： H04M9/08
CPC分类号： H04B3/23
摘要： A communication system having an echo canceller is disclosed. One embodiment of the echo canceller includes an adaptive filter used to provide an estimate of reflected echo which is removed from the send signal. The echo canceller may also include a near-end talker signal detector which may be used to prevent the adaptive filter from adapting when a near-end talker signal is present. The echo canceller may also include a nonlinear processor used to further reduce any residual echo and to preserve background noise. The echo canceller may also include a monitor and control unit which may be used to monitor the filter coefficients and gain of the adaptive filter to maintain stability of the echo canceller, estimate pure delay, detect a tone, and inject a training signal. The echo canceller may also include a nonadaptive filter used to reduce the length of the adaptive filter.
摘要翻译：公开了一种具有回波消除器的通信系统。回波消除器的一个实施例包括用于提供从发送信号中去除的反射回波的估计的自适应滤波器。回波消除器还可以包括近端讲话者信号检测器，其可以用于在存在近端讲话者信号时防止自适应滤波器适应。回波消除器还可以包括非线性处理器，用于进一步减少任何残留回波并保留背景噪声。回波消除器还可以包括监视器和控制单元，其可以用于监视滤波器系数和自适应滤波器的增益以保持回声消除器的稳定性，估计纯延迟，检测音调以及注入训练信号。回波消除器还可以包括用于减小自适应滤波器的长度的非自适应滤波器。

2. 发明授权

US07016488B2 Method and apparatus for non-linear processing of an audio signal 有权
公开(公告)号：US07016488B2
公开(公告)日：2006-03-21
申请号：US10178597
申请日：2002-06-24
申请人： Perry P. He , Roger A. Smith , Lucio F. C. Pessoa , Roman A. Dyba
发明人： Perry P. He , Roger A. Smith , Lucio F. C. Pessoa , Roman A. Dyba
IPC分类号： H04M9/08
CPC分类号： H04B3/23
摘要： A communication system having an echo canceller is disclosed. One embodiment of the echo canceller includes an adaptive filter used to provide an estimate of reflected echo which is removed from the send signal. The echo canceller may also include a near-end talker signal detector which may be used to prevent the adaptive filter from adapting when a near-end talker signal is present. The echo canceller may also include a nonlinear processor used to further reduce any residual echo and to preserve background noise. The echo canceller may also include a monitor and control unit which may be used to monitor the filter coefficients and gain of the adaptive filter to maintain stability of the echo canceller, estimate pure delay, detect a tone, and inject a training signal. The echo canceller may also include a nonadaptive filter used to reduce the length of the adaptive filter.

3. 发明授权

US08139760B2 Estimating delay of an echo path in a communication system 有权
标题翻译：估计通信系统中回波路径的延迟
公开(公告)号：US08139760B2
公开(公告)日：2012-03-20
申请号：US11711327
申请日：2007-02-27
申请人： Roman A. Dyba , Perry P. He
发明人： Roman A. Dyba , Perry P. He
IPC分类号： H04M9/08
CPC分类号： H04B3/237 , H04M3/002
摘要： Methods and corresponding systems for reducing an echo signal include assigning a subsegment delay to each of a plurality of subsegment adaptive filters. A send signal and a delayed receive signal are coupled to each of the subsegment adaptive filters, wherein the delayed receive signal is delayed according to a respective subsegment delay. A set of filter coefficients in each of the subsegment adaptive filters are adapted, in parallel, to correspond to a respective subsegment impulse response of a connected system. Each set of filter coefficients is analyzed to produce a pure delay, and the pure delay is used to delay the receive signal for a main adaptive filter. An echo signal replica is produced using the main adaptive filter and an error signal. The echo signal replica is subtracted from the send signal to produce the error signal.
摘要翻译：用于减少回波信号的方法和相应的系统包括将子段延迟分配给多个子段自适应滤波器中的每一个。发送信号和延迟的接收信号被耦合到每个子段自适应滤波器，其中延迟的接收信号根据相应的子段延迟被延迟。每个子段自适应滤波器中的一组滤波器系数并行地适应于对应于所连接系统的相应子段脉冲响应。分析每组滤波器系数以产生纯延迟，纯延迟用于延迟主自适应滤波器的接收信号。使用主自适应滤波器和误差信号产生回波信号副本。从发送信号中减去回波信号副本以产生误差信号。

4. 发明授权

US07639671B2 Allocating processing resources for multiple instances of a software component 有权
标题翻译：为软件组件的多个实例分配处理资源
公开(公告)号：US07639671B2
公开(公告)日：2009-12-29
申请号：US11369737
申请日：2006-03-07
申请人： Brad L. Zwernemann , Roman A. Dyba , Perry P. He , Lucio F. C. Pessoa
发明人： Brad L. Zwernemann , Roman A. Dyba , Perry P. He , Lucio F. C. Pessoa
IPC分类号： H04L12/66
CPC分类号： G06F9/4881 , G06Q30/04
摘要： Methods and corresponding systems for allocating processing resources for a number of instances (N) of a software component include determining an average processing cost (μ) and a variance (σ2) for the software component. Then a processing cost for the software component is estimated as a function of N, the average processing cost (μ), and the variance (σ2), and processing resources are allocated in response to the estimated processing cost. The software component can be partitioned into a number of blocks (L), wherein the L blocks include a required block and one or more optional blocks. In some embodiments in response to a total estimated processing cost exceeding an available processing value, selected optional blocks can be disabled to reduce the total estimated processing cost to a value equal to or less than the available processing value. The optional blocks can be prioritized and disabled in order of priority.
摘要翻译：用于为软件组件的多个实例（N）分配处理资源的方法和相应系统包括确定软件组件的平均处理成本（μ）和方差（sigma2）。然后，根据估计的处理成本，估计软件组件的处理成本作为N的函数，平均处理成本（μ）和方差（sigma2），并且分配处理资源。软件组件可以被划分成多个块（L），其中L块包括所需块和一个或多个可选块。在一些实施例中，响应于总估计处理成本超过可用处理值，可以禁用所选择的可选块以将总估计处理成本减小到等于或小于可用处理值的值。可以按优先顺序优先选择和禁用可选块。

5. 发明授权

US08290141B2 Techniques for comfort noise generation in a communication system 有权
标题翻译：在通信系统中产生舒适噪声的技术
公开(公告)号：US08290141B2
公开(公告)日：2012-10-16
申请号：US12105870
申请日：2008-04-18
申请人： Roman A. Dyba , Perry P. He , Brad L. Zwernemann
发明人： Roman A. Dyba , Perry P. He , Brad L. Zwernemann
IPC分类号： H04M9/08
CPC分类号： G10L19/012
摘要： A technique of operating a communication device includes dividing a frequency band associated with a background noise signal into respective sub-bands. Respective individual level estimates for each of the respective sub-bands are then determined. A total level estimate for the background noise signal is determined. Finally, a comfort noise signal (whose characteristics are based on the respective individual level estimates and the total level estimate) is provided.
摘要翻译：操作通信设备的技术包括将与背景噪声信号相关联的频带划分成相应的子带。然后确定每个各个子带的各个级别估计。确定背景噪声信号的总电平估计。最后，提供舒适噪声信号（其特征基于相应的个体水平估计和总水平估计）。

6. 发明申请

US20080205633A1 Estimating delay of an echo path in a communication system 有权
标题翻译：估计通信系统中回波路径的延迟
公开(公告)号：US20080205633A1
公开(公告)日：2008-08-28
申请号：US11711327
申请日：2007-02-27
申请人： Roman A. Dyba , Perry P. He
发明人： Roman A. Dyba , Perry P. He
IPC分类号： H04M9/08
CPC分类号： H04B3/237 , H04M3/002
摘要： Methods and corresponding systems for reducing an echo signal include assigning a subsegment delay to each of a plurality of subsegment adaptive filters. A send signal and a delayed receive signal are coupled to each of the subsegment adaptive filters, wherein the delayed receive signal is delayed according to a respective subsegment delay. A set of filter coefficients in each of the subsegment adaptive filters are adapted, in parallel, to correspond to a respective subsegment impulse response of a connected system. Each set of filter coefficients is analyzed to produce a pure delay, and the pure delay is used to delay the receive signal for a main adaptive filter. An echo signal replica is produced using the main adaptive filter and an error signal. The echo signal replica is subtracted from the send signal to produce the error signal.
摘要翻译：用于减少回波信号的方法和相应的系统包括将子段延迟分配给多个子段自适应滤波器中的每一个。发送信号和延迟的接收信号被耦合到每个子段自适应滤波器，其中延迟的接收信号根据相应的子段延迟被延迟。每个子段自适应滤波器中的一组滤波器系数并行地适应于对应于所连接系统的相应子段脉冲响应。分析每组滤波器系数以产生纯延迟，纯延迟用于延迟主自适应滤波器的接收信号。使用主自适应滤波器和误差信号产生回波信号副本。从发送信号中减去回波信号副本以产生误差信号。

7. 发明授权

US07215765B2 Method and apparatus for pure delay estimation in a communication system 有权
标题翻译：通信系统中纯延迟估计的方法和装置
公开(公告)号：US07215765B2
公开(公告)日：2007-05-08
申请号：US10178154
申请日：2002-06-24
申请人： Roman A. Dyba , Perry P. He , Lucio F. C. Pessoa
发明人： Roman A. Dyba , Perry P. He , Lucio F. C. Pessoa
IPC分类号： H04M9/08
CPC分类号： H04B3/23
摘要： A communication system having an echo canceller is disclosed. One embodiment of the echo canceller includes an adaptive filter used to provide an estimate of reflected echo which is removed from the send signal. The echo canceller may also include a near-end talker signal detector which may be used to prevent the adaptive filter from adapting when a near-end talker signal is present. The echo canceller may also include a nonlinear processor used to further reduce any residual echo and to preserve background noise. The echo canceller may also include a monitor and control unit which may be used to monitor the filter coefficients and gain of the adaptive filter to maintain stability of the echo canceller, estimate pure delay, detect a tone, and inject a training signal. The echo canceller may also include a nonadaptive filter used to reduce the length of the adaptive filter.
摘要翻译：公开了一种具有回波消除器的通信系统。回波消除器的一个实施例包括用于提供从发送信号中去除的反射回波的估计的自适应滤波器。回波消除器还可以包括近端讲话者信号检测器，其可以用于在存在近端讲话者信号时防止自适应滤波器适应。回波消除器还可以包括非线性处理器，用于进一步减少任何残留回波并保留背景噪声。回波消除器还可以包括监视器和控制单元，其可以用于监视滤波器系数和自适应滤波器的增益以保持回声消除器的稳定性，估计纯延迟，检测音调以及注入训练信号。回波消除器还可以包括用于减小自适应滤波器的长度的非自适应滤波器。

8. 发明授权

US08300802B2 Adaptive filter for use in echo reduction 有权
标题翻译：用于回波减少的自适应滤波器
公开(公告)号：US08300802B2
公开(公告)日：2012-10-30
申请号：US11897872
申请日：2007-08-31
申请人： Hongyang Deng , Roman A. Dyba , Perry P. He
发明人： Hongyang Deng , Roman A. Dyba , Perry P. He
IPC分类号： H04M9/00
CPC分类号： H04B3/23
摘要： Methods and corresponding systems in an adaptive filter include calculating a signal estimator output using filter coefficients, and calculating an error signal. Next, a coefficient threshold is determined. Thereafter, for each filter coefficient, a first step size is assigned to filter coefficients with a magnitude less than the coefficient threshold, and a second step size is assigned to filter coefficients with a magnitude greater than or equal to the coefficient threshold. Finally, the filter coefficients are updated using the first and second step sizes and the error signal. The coefficient threshold can be selected as the average of the magnitudes of the filter coefficients. Alternatively, the coefficient threshold can be selected as the Mth largest of the filter coefficients ranked in order of magnitude. In one embodiment, the first step size can be less than one and the second step size can be greater than one.
摘要翻译：自适应滤波器中的方法和相应系统包括使用滤波器系数计算信号估计器输出，并计算误差信号。接下来，确定系数阈值。此后，对于每个滤波器系数，分配具有小于系数阈值的幅度的滤波系数的第一步长，并且将第二步长分配给具有大于或等于系数阈值的幅度的滤波系数。最后，使用第一和第二步长和误差信号来更新滤波器系数。可以将系数阈值选择为滤波器系数的幅度的平均值。或者，可以选择系数阈值作为按量级排列的第M个最大的滤波器系数。在一个实施例中，第一步长可以小于1，而第二步长可以大于1。

9. 发明申请

US20090265169A1 Techniques for Comfort Noise Generation in a Communication System 有权
标题翻译：通信系统中舒适噪声生成技术
公开(公告)号：US20090265169A1
公开(公告)日：2009-10-22
申请号：US12105870
申请日：2008-04-18
申请人： Roman A. Dyba , Perry P. He , Brad L. Zwernemann
发明人： Roman A. Dyba , Perry P. He , Brad L. Zwernemann
IPC分类号： G10L15/20
CPC分类号： G10L19/012
摘要： A technique of operating a communication device includes dividing a frequency band associated with a background noise signal into respective sub-bands. Respective individual level estimates for each of the respective sub-bands are then determined. A total level estimate for the background noise signal is determined. Finally, a comfort noise signal (whose characteristics are based on the respective individual level estimates and the total level estimate) is provided.
摘要翻译：操作通信设备的技术包括将与背景噪声信号相关联的频带划分成相应的子带。然后确定每个各个子带的各个级别估计。确定背景噪声信号的总电平估计。最后，提供舒适噪声信号（其特征基于相应的个体水平估计和总水平估计）。

10. 发明授权

US07599432B2 Method and apparatus for dynamically inserting gain in an adaptive filter system 有权
标题翻译：在自适应滤波系统中动态插入增益的方法和装置
公开(公告)号：US07599432B2
公开(公告)日：2009-10-06
申请号：US10730449
申请日：2003-12-08
申请人： Lucio F. C. Pessoa , Roman A. Dyba , Perry P. He , Ahsan Ul Aziz
发明人： Lucio F. C. Pessoa , Roman A. Dyba , Perry P. He , Ahsan Ul Aziz
IPC分类号： H03H7/40 , H04B3/20 , H04M9/08
CPC分类号： H04B3/235 , H03H21/0012 , H03H21/0067 , H03H2021/0078
摘要： A method and apparatus for dynamically inserting gain in an adaptive filter is taught. This selective insertion of gain may be used to allow an adaptive filter to converge more quickly and/or to overcome inherent limitations of the adaptive filter. An echo canceller (e.g. 20 and 22 in FIG. 1) is just one possible use for an adaptive filter having a shorter convergence time. However, virtually all uses of an adaptive filter can benefit from a shorter convergence time and/or improved filtering performance.
摘要翻译：教导了一种在自适应滤波器中动态插入增益的方法和装置。增益的这种选择性插入可以用于允许自适应滤波器更快地收敛和/或克服自适应滤波器的固有限制。回声消除器（例如，图1中的20和22）仅仅是具有较短收敛时间的自适应滤波器的一种可能的用途。然而，自适应滤波器的几乎所有用途都可以从更短的收敛时间和/或改进的滤波性能中受益。

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