公开(公告)号：US09426279B2

公开(公告)日：2016-08-23

申请号：US14160467

申请日：2014-01-21

Applicant: CONEXANT SYSTEMS, INC.

Inventor： Youhong Lu ,  Trausti Thormundsson ,  Yair Kerner ,  Ragnar H. Jonsson

IPC: H04M9/08 ,  H04M3/00

CPC classification number: H04M3/002 ,  H04M9/082

Abstract: Traditionally, echo cancellation has employed linear adaptive filters to cancel echoes in a two way communication system. The rate of adaptation is often dynamic and varies over time. Disclosed are novel rates of adaptation that perform well in the presence of background noise, during double talk and with echo path changes. Additionally, the echo or residual echo can further be suppressed with non-linear processing performed using joint frequency-time domain processing.

Abstract translation: 传统上，回波消除采用线性自适应滤波器来消除双向通信系统中的回波。 适应率通常是动态的，随时间而变化。 公开了在双重通话期间和具有回波路径改变的情况下，在背景噪声的存在下表现良好的适应性适应性。 此外，通过使用联合频域处理执行的非线性处理，可进一步抑制回波或残留回波。

公开(公告)号：US09407992B2

公开(公告)日：2016-08-02

申请号：US14105765

申请日：2013-12-13

Applicant: Conexant Systems, Inc.

Inventor： Chris X. Gao ,  Govind Kannan ,  Youhong Lu ,  Trausti Thormundsson ,  Vilhjalmur S. Thorvaldsson

IPC: H04R3/00 ,  H04R3/02

CPC classification number: H04R3/02

Abstract: A method for continuously estimating reverberation decay comprising receiving a sequence of audio data samples. Determining whether a plateau is present in the sequence of audio data samples. Generating one or more reverberation parameters from the sequence of audio data samples if it is determined that the plateau is present.

Abstract translation: 一种用于连续估计混响衰减的方法，包括接收音频数据样本序列。 确定音频数据样本序列中是否存在平台。 如果确定高原存在，则从音频数据样本序列生成一个或多个混响参数。

公开(公告)号：US09473865B2

公开(公告)日：2016-10-18

申请号：US13783074

申请日：2013-03-01

Applicant: Conexant Systems, Inc.

Inventor： Trausti Thormundsson ,  Ragnar H. Jonsson ,  Youhong Lu ,  Govind Kannan ,  Sverrir Olafsson

IPC: G10K11/16 ,  H04R29/00 ,  G01S15/02 ,  G01S15/52 ,  H04S7/00

CPC classification number: H04R29/00 ,  G01S15/025 ,  G01S15/526 ,  H04R2499/13 ,  H04S7/00 ,  H04S2400/13

Abstract: A system for detecting motion comprising a first speaker, a first microphone separated from the first speaker by a distance D1, a sound generator, an echo parameter measurement device and an echo parameter monitor, wherein the echo parameter monitor stores two or more sequential echo parameters and generates a motion indicator if the two or more sequential echo parameters indicate a change in an acoustic echo path that exceeds a predetermined threshold.

Abstract translation: 一种用于检测运动的系统，包括第一扬声器，从第一扬声器分离距离D1的第一麦克风，声音发生器，回波参数测量装置和回波参数监视器，其中回波参数监视器存储两个或更多个顺序回波参数 并且如果所述两个或更多个顺序回波参数指示声学​​回声路径中的变化超过预定阈值，则生成运动指示器。

公开(公告)号：US20140169575A1

公开(公告)日：2014-06-19

申请号：US14105765

申请日：2013-12-13

Applicant: Conexant Systems, Inc.

Inventor： Chris X. Gao ,  Govind Kannan ,  Youhong Lu ,  Trausti Thormundsson ,  Vilhjalmur S. Thorvaldsson

IPC: H04R3/00

CPC classification number: H04R3/02

Abstract: A method for continuously estimating reverberation decay comprising receiving a sequence of audio data samples. Determining whether a plateau is present in the sequence of audio data samples. Generating one or more reverberation parameters from the sequence of audio data samples if it is determined that the plateau is present.

Abstract translation: 一种用于连续估计混响衰减的方法，包括接收音频数据样本序列。 确定音频数据样本序列中是否存在平台。 如果确定平台存在，则从音频数据样本序列生成一个或多个混响参数。

公开(公告)号：US20150341501A1

公开(公告)日：2015-11-26

申请号：US14727799

申请日：2015-06-01

Applicant: Conexant Systems, Inc.

Inventor： Youhong Lu ,  Trausti Thormundsson

IPC: H04M9/08 ,  H04B3/23 ,  G10K11/16

CPC classification number: H04M9/082 ,  G10K11/16 ,  G10K2210/505 ,  H04B3/23

Abstract: Presented is a method and associated system for suppression of linear and nonlinear echo. The method includes dividing an input signal into several frequency bands in each of a several of time frames. The input signal may include an echo signal. The method further includes multiplying the input signal in each of the several frequency bands by a corresponding echo suppression signal. Calculating the corresponding echo suppression signal may include estimating a power of the echo signal in a particular frequency band as a sum of several component echo powers, each of the several component echo powers due to an excitation from a far-end signal in a corresponding one of the several frequency bands. Calculating the corresponding echo suppression signal may further include subtracting the power of the echo signal in the particular frequency band from a power of the input signal in the particular frequency hand.

Abstract translation: 提出了一种用于抑制线性和非线性回波的方法和相关系统。 该方法包括在几个时间帧的每一个中将输入信号划分成多个频带。 输入信号可以包括回波信号。 该方法还包括将相应的回波抑制信号乘以多个频带中的每一个中的输入信号。 计算相应的回波抑制信号可以包括：将特定频带内的回波信号的功率估计为若干分量回波功率之和，由于对应的一个远端信号的激励导致的几个分量回波功率中的每一个 的几个频带。 计算相应的回波抑制信号还可以包括从特定频率手中的输入信号的功率减去特定频带中的回波信号的功率。

公开(公告)号：US20140133649A1

公开(公告)日：2014-05-15

申请号：US14160467

申请日：2014-01-21

Applicant: CONEXANT SYSTEMS, INC.

Inventor： Youhong Lu ,  Trausti Thormundsson ,  Yair Kerner ,  Ragnar H. Jonsson

IPC: H04M3/00

CPC classification number: H04M3/002 ,  H04M9/082

Abstract: Traditionally, echo cancellation has employed linear adaptive filters to cancel echoes in a two way communication system. The rate of adaptation is often dynamic and varies over time. Disclosed are novel rates of adaptation that perform well in the presence of background noise, during double talk and with echo path changes. Additionally, the echo or residual echo can further be suppressed with non-linear processing performed using joint frequency-time domain processing.

Abstract translation: 传统上，回波消除采用线性自适应滤波器来消除双向通信系统中的回波。 适应率通常是动态的，随时间而变化。 公开了在双重通话期间和具有回波路径改变的情况下，在背景噪声的存在下表现良好的适应性适应性。 此外，通过使用联合频域处理执行的非线性处理，可进一步抑制回波或残留回波。

公开(公告)号：US20140016794A1

公开(公告)日：2014-01-16

申请号：US13941350

申请日：2013-07-12

Applicant: Conexant Systems, Inc.

Inventor： Youhong Lu ,  Trausti Thormundsson ,  Chris Gao

IPC: H04R3/00

CPC classification number: H04R3/002 ,  H04R1/342 ,  H04R1/345 ,  H04R3/02 ,  H04R2430/03

Abstract: An audio processing system comprising two or more microphones and an echo cancellation system configured to apply a fast converging adaptive filtering algorithm to low frequency bands of a first microphone signal to generate first synthesized echo signal components and an adaptive filtering algorithm to high frequency bands of the first microphone signal to generate second synthesized echo signal components and to apply the first synthesized echo signal components and the second synthesized echo signal components to the first microphone signal to cancel an echo signal of the first microphone signal. An echo estimate and suppression system is configured to receive the first synthesized echo signal components and the second synthesized echo signal components and to apply them to estimate powers of echo signals in one or more additional microphones.

Abstract translation: 一种音频处理系统，包括两个或多个麦克风和回声消除系统，该系统被配置为对第一麦克风信号的低频带应用快速收敛自适应滤波算法，以产生第一合成回波信号分量和自适应滤波算法到高频带 第一麦克风信号以产生第二合成回波信号分量并将第一合成回波信号分量和第二合成回波信号分量应用于第一麦克风信号以消除第一麦克风信号的回波信号。 回波估计和抑制系统被配置为接收第一合成回波信号分量和第二合成回波信号分量，并将其应用于估计一个或多个附加麦克风中的回波信号的功率。