Techniques for Implementing Adaptation Control of an Echo Canceller to Facilitate Detection of In-Band Signals
    1.
    发明申请
    Techniques for Implementing Adaptation Control of an Echo Canceller to Facilitate Detection of In-Band Signals 有权
    用于实现回波消除器的适应控制以便于检测带内信号的技术

    公开(公告)号:US20110261949A1

    公开(公告)日:2011-10-27

    申请号:US12768366

    申请日:2010-04-27

    IPC分类号: H04M9/08

    CPC分类号: H04B3/23

    摘要: A technique for detecting in-band signaling tones in a communication system includes performing a first adaptation of an adaptive filter of an echo canceller in response to detection of a far-end harmonic signal. In this case, the adaptive filter provides an echo estimation signal. The technique also includes subtracting the echo estimation signal from a near-end signal that includes one or more in-band signaling tones to provide an error signal. The technique further includes detecting, using a tone detector, the one or more in-band signaling tones in the error signal.

    摘要翻译: 用于检测通信系统中的带内信令音的技术包括:响应于远端谐波信号的检测,执行回波消除器的自适应滤波器的第一自适应。 在这种情况下,自适应滤波器提供回波估计信号。 该技术还包括从包括一个或多个带内信令音调的近端信号中减去回波估计信号以提供误差信号。 该技术还包括使用音调检测器检测误差信号中的一个或多个带内信令音调。

    Techniques for Updating Filter Coefficients of an Adaptive Filter
    2.
    发明申请
    Techniques for Updating Filter Coefficients of an Adaptive Filter 有权
    更新自适应滤波器滤波器系数的技术

    公开(公告)号:US20110261948A1

    公开(公告)日:2011-10-27

    申请号:US12768275

    申请日:2010-04-27

    IPC分类号: H04M9/08

    CPC分类号: H04B3/23

    摘要: A technique for updating filter coefficients of an adaptive filter includes filtering a signal with an adaptive filter, whose filter coefficients are grouped into filter blocks. In this case a number of the filter blocks is less than or equal to a number of the filter coefficients. During each update period, the filter coefficients for less than all of the filter blocks are updated based on a network echo path impulse response.

    摘要翻译: 用于更新自适应滤波器的滤波器系数的技术包括用自适应滤波器对信号进行滤波,滤波器系数被分组成滤波器块。 在这种情况下,多个滤波器块小于或等于滤波器系数的数量。 在每个更新周期期间,基于网络回波路径脉冲响应更新小于所有滤波器块的滤波器系数。

    METHOD AND APPARATUS HAVING ECHO CANCELLATION AND TONE DETECTION FOR A VOICE/TONE COMPOSITE SIGNAL
    3.
    发明申请
    METHOD AND APPARATUS HAVING ECHO CANCELLATION AND TONE DETECTION FOR A VOICE/TONE COMPOSITE SIGNAL 审中-公开
    具有声音/音调复合信号的ECHO取消和音调检测的方法和装置

    公开(公告)号:US20110013766A1

    公开(公告)日:2011-01-20

    申请号:US12503345

    申请日:2009-07-15

    IPC分类号: H04M9/08

    CPC分类号: H04M9/082 H04Q1/453

    摘要: A system includes receive and send inputs, an adaptive filter, a combiner, a non-linear processor, and a tone detector. The receive input receives a first signal having first voice and first tone information. The send input receives a second signal having echo information, second tone information, and second voice information. The adaptive filter has an input coupled to the receive input, and an output. The combiner has a first input coupled to the send input, a second input coupled to the output of the adaptive filter, and an output providing an intermediate signal. The nonlinear processor has an input coupled to the output of the combiner and an output for providing an output signal for obtaining the second voice. The tone detector is coupled to the output of the combiner and detects the second tone in the intermediate signal prior to the intermediate signal being processed by the nonlinear processor.

    摘要翻译: 系统包括接收和发送输入,自适应滤波器,组合器,非线性处理器和音调检测器。 接收输入接收具有第一语音和第一音调信息的第一信号。 发送输入接收具有回波信息,第二音调信息和第二语音信息的第二信号。 自适应滤波器具有耦合到接收输入的输入和输出。 组合器具有耦合到发送输入的第一输入,耦合到自适应滤波器的输出的第二输入和提供中间信号的输出。 非线性处理器具有耦合到组合器的输出的输入和用于提供用于获得第二语音的输出信号的输出。 音调检测器耦合到组合器的输出,并且在由非线性处理器处理中间信号之前检测中间信号中的第二音调。

    Selective tone event detector and method therefor
    4.
    发明授权
    Selective tone event detector and method therefor 有权
    选择性色调事件检测器及其方法

    公开(公告)号:US07844048B2

    公开(公告)日:2010-11-30

    申请号:US10795700

    申请日:2004-03-08

    IPC分类号: H04M3/00

    CPC分类号: H04Q1/457 H04M11/066

    摘要: In one embodiment, a tone event detector first determines whether the presence of a tone is indicated on the input signal, and then, based on this determination, selectively determines whether a tone has been detected on the input signal. For example, in one embodiment, tone detection is performed only when the presence of a tone is first indicated, such that if the presence of a tone is not indicated, tone detection need not be performed. This may help reduce complexity of a tone event detector since a simplified method may be used to indicate the presence of a tone, and the more complex algorithms for tone detection may be enabled only when needed. Also, in one embodiment, detection of a tone includes generating one or more tone characteristics corresponding to the detected tone which may then be used to determine whether the detected tone corresponds to a valid tone event.

    摘要翻译: 在一个实施例中,音调事件检测器首先确定在输入信号上是否指示音调的存在,然后基于该确定,选择性地确定是否在输入信号上检测到音调。 例如,在一个实施例中,仅当首先指示音调的存在时才执行音调检测,使得如果没有指示音调的存在,则不需要执行音调检测。 这可能有助于降低音调事件检测器的复杂性,因为可以使用简化的方法来指示音调的存在,并且可以仅在需要时才启用用于音调检测的更复杂的算法。 此外,在一个实施例中,音调的检测包括产生与检测到的音调相对应的一个或多个音调特性,然后可以使用它们来确定检测到的音调是否对应于有效音调事件。

    Techniques for updating filter coefficients of an adaptive filter
    5.
    发明授权
    Techniques for updating filter coefficients of an adaptive filter 有权
    用于更新自适应滤波器的滤波器系数的技术

    公开(公告)号:US08693677B2

    公开(公告)日:2014-04-08

    申请号:US12768275

    申请日:2010-04-27

    CPC分类号: H04B3/23

    摘要: A technique for updating filter coefficients of an adaptive filter includes filtering a signal with an adaptive filter, whose filter coefficients are grouped into filter blocks. In this case a number of the filter blocks is less than or equal to a number of the filter coefficients. During each update period, the filter coefficients for less than all of the filter blocks are updated based on a network echo path impulse response.

    摘要翻译: 用于更新自适应滤波器的滤波器系数的技术包括用自适应滤波器对信号进行滤波,滤波器系数被分组成滤波器块。 在这种情况下,多个滤波器块小于或等于滤波器系数的数量。 在每个更新周期期间,基于网络回波路径脉冲响应更新小于所有滤波器块的滤波器系数。

    Techniques for implementing adaptation control of an echo canceller to facilitate detection of in-band signals
    6.
    发明授权
    Techniques for implementing adaptation control of an echo canceller to facilitate detection of in-band signals 有权
    用于实现回波消除器的自适应控制以便于检测带内信号的技术

    公开(公告)号:US08787561B2

    公开(公告)日:2014-07-22

    申请号:US12768366

    申请日:2010-04-27

    IPC分类号: H04M9/08

    CPC分类号: H04B3/23

    摘要: A technique for detecting in-band signaling tones in a communication system includes performing a first adaptation of an adaptive filter of an echo canceller in response to detection of a far-end harmonic signal. In this case, the adaptive filter provides an echo estimation signal. The technique also includes subtracting the echo estimation signal from a near-end signal that includes one or more in-band signaling tones to provide an error signal. The technique further includes detecting, using a tone detector, the one or more in-band signaling tones in the error signal.

    摘要翻译: 用于检测通信系统中的带内信令音的技术包括:响应于远端谐波信号的检测,执行回波消除器的自适应滤波器的第一自适应。 在这种情况下,自适应滤波器提供回波估计信号。 该技术还包括从包括一个或多个带内信令音调的近端信号中减去回波估计信号以提供误差信号。 该技术还包括使用音调检测器检测误差信号中的一个或多个带内信令音调。

    System and method for control logic code reordering based on stochastic execution time information
    7.
    发明授权
    System and method for control logic code reordering based on stochastic execution time information 有权
    基于随机执行时间信息的控制逻辑代码重新排序的系统和方法

    公开(公告)号:US07818720B2

    公开(公告)日:2010-10-19

    申请号:US11338252

    申请日:2006-01-24

    IPC分类号: G06F9/44

    CPC分类号: G06F8/443

    摘要: A method, computer program product, and data processing system for performing automated optimization of a control processing flow containing Boolean conditional expressions is disclosed. Each conditional expression is profiled using a representative set of test vectors to determine the probabilities of individual conditions and combinations of conditions in the expression. Next, the expression is restructured or reordered, including selective computation of subexpressions, based on the probability information, so as to maximize the probability of a short-circuit termination of evaluation of the expression and/or to minimize the statistical execution time of the expression. This process is performed for all Boolean conditional expressions related to the control processing flow.

    摘要翻译: 公开了一种用于执行包含布尔条件表达式的控制处理流的自动优化的方法,计算机程序产品和数据处理系统。 每个条件表达式使用代表性的一组测试向量进行分析,以确定表达式中各个条件和条件组合的概率。 接下来,表达式被重构或重排序,包括基于概率信息的子表达的选择性计算,以便最大化表达式的评估的短路终止的概率和/或最小化表达式的统计执行时间 。 对与控制处理流程相关的所有布尔条件表达式执行此过程。