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公开(公告)号：US08103011B2
公开(公告)日：2012-01-24
申请号：US11669549
申请日：2007-01-31
摘要： Signal detectors are described herein. By way of example, a system for detecting signals can include a microphone signal detector, a loudspeaker signal detector, a signal discriminator and a decision component. When the microphone signal detector detects the presence of a microphone signal, the loudspeaker signal detector detects the presence of a loudspeaker signal and the signal discriminator determines that near-end speech dominates loudspeaker echo, the decision component can confirm the presence of doubletalk. When the microphone signal detector detects the presence of a microphone signal and the signal discriminator determines that near-end speech dominates loudspeaker echo, the decision component confirms the presence of near-end signal.
摘要翻译： 这里描述了信号检测器。 作为示例，用于检测信号的系统可以包括麦克风信号检测器，扬声器信号检测器，信号鉴别器和决定部件。 当麦克风信号检测器检测到麦克风信号的存在时，扬声器信号检测器检测到扬声器信号的存在，并且信号鉴别器确定近端语音主导扬声器回波，判定部件可以确认双音节的存在。 当麦克风信号检测器检测到麦克风信号的存在并且信号鉴别器确定近端语音主导扬声器回波时，决定部件确认近端信号的存在。
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2.发明申请公开(公告)号：US20110013781A1
公开(公告)日：2011-01-20
申请号：US12890075
申请日：2010-09-24
IPC分类号： H04B3/20
CPC分类号： H04M9/082
摘要： A regression-based residual echo suppression (RES) system and process for suppressing the portion of the microphone signal corresponding to a playback of a speaker audio signal that was not suppressed by an acoustic echo canceller (AEC). In general, a prescribed regression technique is used between a prescribed spectral attribute of multiple past and present, fixed-length, periods (e.g., frames) of the speaker signal and the same spectral attribute of a current period (e.g., frame) of the echo residual in the output of the AEC. This automatically takes into consideration the correlation between the time periods of the speaker signal. The parameters of the regression can be easily tracked using adaptive methods. Multiple applications of RES can be used to produce better results and this system and process can be applied to stereo-RES as well.
摘要翻译： 基于回归的残差回波抑制（RES）系统和用于抑制对应于未被声学回声消除器（AEC）抑制的扬声器音频信号的重放的麦克风信号的部分的处理。 通常，在多个过去和现在，固定长度的扬声器信号的周期（例如，帧）和当前周期（例如，帧）的相同频谱属性之间使用规定的回归技术 AEC输出中的回波残差。 这自动考虑了扬声器信号的时间段之间的相关性。 可以使用自适应方法轻松跟踪回归的参数。 RES的多个应用可以用于产生更好的结果，并且该系统和过程也可以应用于立体声RES。
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公开(公告)号：US08014519B2
公开(公告)日：2011-09-06
申请号：US11695426
申请日：2007-04-02
IPC分类号： H04M9/08
CPC分类号： H04M9/082
摘要： Cross-correlation based echo canceller controllers are described herein. By way of example, a system for controlling an echo canceller having one or more adaptive filters can include one or more adaptive filter controllers each corresponding to one of the one or more adaptive filters and each configured to halt adaptation of its corresponding adaptive filter according to the cross-correlation of its corresponding corrupted signal and its corresponding error signal of its corresponding adaptive filter.
摘要翻译： 本文描述了基于互相关的回声消除器控制器。 作为示例，用于控制具有一个或多个自适应滤波器的回波消除器的系统可以包括一个或多个自适应滤波器控制器，每个自适应滤波器控制器对应于一个或多个自适应滤波器中的一个自适应滤波器，并且每个被配置为根据 其相应的损坏信号的互相关及其对应的自适应滤波器的相应误差信号。
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公开(公告)号：US08019075B2
公开(公告)日：2011-09-13
申请号：US11695447
申请日：2007-04-02
IPC分类号： H04M9/08
CPC分类号： H04M9/082
摘要： Hybrid echo canceller controllers are described herein. By way of example, a system for controlling an echo canceller can include a cross-correlator, a discriminator and an echo canceller controller. The cross-correlator can be configured to produce a cross-correlation based output that facilitates controlling the echo canceller by cross-correlating two signals associated with the echo canceller. The discriminator can be configured to produce a discriminator output that discriminates between near-end signal and echo in a corrupted signal. The echo canceller controller can be configured to control the echo canceller according to the cross-correlation based output and the discriminator output.
摘要翻译： 本文描述了混合回波消除器控制器。 作为示例，用于控制回波消除器的系统可以包括交叉相关器，鉴别器和回声消除器控制器。 互相关器可以被配置为产生基于互相关的输出，其有助于通过将与回波消除器相关联的两个信号相互关联来控制回波消除器。 鉴别器可以被配置为产生鉴别器输出，其鉴别受损信号中的近端信号和回波。 回波消除器控制器可以被配置为根据基于互相关的输出和鉴别器输出来控制回波消除器。
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公开(公告)号：US08081753B2
公开(公告)日：2011-12-20
申请号：US11695440
申请日：2007-04-02
IPC分类号： H04M9/08
CPC分类号： H04M9/082
摘要： Hybrid echo canceller controllers are described herein. By way of example, a system for controlling an echo canceller can include a signal indicator and an echo canceller controller. The signal indicator can be configured to indicate periods of near-end signal and to indicate periods of echo only with echo-path change in the corrupted signal based at least in part on cross-correlation between two signals associated with the echo canceller. The echo canceller controller can be configured to control the echo canceller according to indications from the signal indicator.
摘要翻译： 本文描述了混合回波消除器控制器。 作为示例，用于控制回波消除器的系统可以包括信号指示器和回波消除器控制器。 信号指示器可以被配置为指示近端信号的周期，并且至少部分地基于与回波消除器相关联的两个信号之间的互相关，仅指示被破坏的信号中的回波路径改变的回波周期。 回波消除器控制器可以被配置为根据来自信号指示器的指示来控制回波消除器。
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公开(公告)号：US07925007B2
公开(公告)日：2011-04-12
申请号：US11150017
申请日：2005-06-10
申请人： Jack W. Stokes, III , John Platt
发明人： Jack W. Stokes, III , John Platt
IPC分类号： H04M9/08
CPC分类号： H04M9/082
摘要： An echo cancellation technique that can process multi-input microphone signals with only a small increase in the overall CPU consumption compared to implementing the algorithm for a single channel microphone signal. Furthermore, the invention provides an architecture that provides for echo cancellation for multiple applications in parallel with only a small increase in CPU consumption compared to a single instance of echo cancellation with a single microphone input and multi-output channel playback.
摘要翻译： 与实现单通道麦克风信号的算法相比，可以处理多输入麦克风信号的回声消除技术与总体CPU消耗相比只有小的增加。 此外，本发明提供了一种架构，其与单个麦克风输入和多输出通道重放的单个回声消除实例相比，仅仅与CPU消耗的小的增加并行地提供多个应用的回波消除。
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公开(公告)号：US08275120B2
公开(公告)日：2012-09-25
申请号：US11421052
申请日：2006-05-30
IPC分类号： H04M9/08
CPC分类号： H04S7/305 , H04B3/23 , H04S2420/07
摘要： An acoustic echo cancellation technique. The present adaptive acoustic echo cancellation technique employs a plurality of acoustic echo cancellation filters which use different adaptation techniques which may employ different parameters such as step size, to improve both the adaptation algorithm convergence time and misadjustment over previously known acoustic echo cancellation techniques.
摘要翻译： 声回波消除技术。 本自适应声学回声消除技术采用多个声学回波消除滤波器，其使用不同的适应技术，其可以采用诸如步长之类的不同参数，以改善先前已知的声学回声消除技术的自适应算法收敛时间和误调整。
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公开(公告)号：US08213598B2
公开(公告)日：2012-07-03
申请号：US12037088
申请日：2008-02-26
IPC分类号： H04M9/08
摘要： Harmonic distortion residual echo suppression (HDRES) technique embodiments are presented which act to suppress the residual echo remaining after a near-end microphone signal has undergone AEC, including harmonic distortion in the signal that was caused by the speaker audio signal playback. In general, an AEC module is employed which suppresses some parts of the speaker audio signal found in a near-end microphone signal and generates an AEC output signal. A HDRES module then inputs the AEC output signal and the speaker audio signal, and suppresses at least a portion of a residual part of the speaker audio signal that was left unsuppressed by the AEC module. This includes at least a portion of the harmonic distortion exhibited in the AEC output signal.
摘要翻译： 提出了谐波失真残差回波抑制（HDRES）技术实施例，其用于抑制近端麦克风信号已经经历AEC之后剩余的残余回声，包括由扬声器音频信号回放引起的信号中的谐波失真。 通常，使用AEC模块，其抑制在近端麦克风信号中发现的扬声器音频信号的一些部分，并产生AEC输出信号。 然后，HDRES模块输入AEC输出信号和扬声器音频信号，并且抑制扬声器音频信号的残留部分的至少一部分，其被AEC模块未被压缩。 这包括在AEC输出信号中呈现的谐波失真的至少一部分。
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公开(公告)号：US20090214048A1
公开(公告)日：2009-08-27
申请号：US12037088
申请日：2008-02-26
IPC分类号： H04B3/20
摘要： Harmonic distortion residual echo suppression (HDRES) technique embodiments are presented which act to suppress the residual echo remaining after a near-end microphone signal has undergone AEC, including harmonic distortion in the signal that was caused by the speaker audio signal playback. In general, an AEC module is employed which suppresses some parts of the speaker audio signal found in a near-end microphone signal and generates an AEC output signal. A HDRES module then inputs the AEC output signal and the speaker audio signal, and suppresses at least a portion of a residual part of the speaker audio signal that was left unsuppressed by the AEC module. This includes at least a portion of the harmonic distortion exhibited in the AEC output signal.
摘要翻译： 提出了谐波失真残差回波抑制（HDRES）技术实施例，其用于抑制近端麦克风信号已经经历AEC之后剩余的残余回声，包括由扬声器音频信号回放引起的信号中的谐波失真。 通常，使用AEC模块，其抑制在近端麦克风信号中发现的扬声器音频信号的一些部分，并产生AEC输出信号。 然后，HDRES模块输入AEC输出信号和扬声器音频信号，并且抑制扬声器音频信号的残留部分的至少一部分，其被AEC模块未被压缩。 这包括在AEC输出信号中呈现的谐波失真的至少一部分。
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公开(公告)号：US08290181B2
公开(公告)日：2012-10-16
申请号：US11084608
申请日：2005-03-19
CPC分类号： H04R3/005 , H03G3/301 , H03G3/3089 , H04R3/02 , H04R2410/00 , H04R2430/01
摘要： A system level automatic gain control (“System AGC”) automatically initializes and controls analog microphone gain in an environment where multiple independent applications simultaneously receive an input from a single analog microphone or microphone array. In one embodiment, the System AGC also prevents those applications from acting to separately control the gain by intercepting external gain control commands and responding to the corresponding application with a corresponding digital gain applied to the input signal from the microphone. Consequently, the System AGC avoids problems relating to oscillations and instability in the microphone gain resulting from multiple applications trying to simultaneously control the gain while preventing each application from adversely affecting the quality of another application's audio capture signal. Further, in one embodiment, the System AGC also acts to maximize the signal to noise (SNR) ratio of the microphone without introducing clipping as a function of a sampled background environment.
摘要翻译： 在多个独立应用程序同时从单个模拟麦克风或麦克风阵列接收输入的环境中，系统级自动增益控制（系统AGC）自动初始化和控制模拟麦克风增益。 在一个实施例中，系统AGC还防止这些应用通过截取外部增益控制命令来单独地控制增益，并且以对应于来自麦克风的输入信号的相应数字增益作出响应。 因此，系统AGC避免了与多个应用程序尝试同时控制增益相关的麦克风增益的振荡和不稳定性问题，同时防止每个应用程序不利地影响另一应用程序的音频捕获信号的质量。 此外，在一个实施例中，系统AGC还用于使麦克风的信噪比（SNR）最大化，而不会引入作为采样的背景环境的函数的削波。
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