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：US20140249812A1

公开(公告)日：2014-09-04

申请号：US14197149

申请日：2014-03-04

Applicant: Conexant Systems, Inc.

Inventor： Sahar E. Bou-Ghazale ,  Trausti Thormundsson ,  Willie B. Wu

IPC: G10L25/84 ,  G10L25/87

CPC classification number: G10L25/84

Abstract: A system for audio processing comprising an initial background statistical model system configured to generate an initial background statistical model using a predetermined sample size of audio data. A parameter computation system configured to generate parametric data for the audio data including cepstral and energy parameters. A background statistics computation system configured to generate preliminary background statistics for determining whether speech has been detected. A first speech detection system configured to determine whether speech was present in the initial sample of audio data. An adaptive background statistical model system configured to provide an adaptive background statistical model for use in continuous processing of audio data for speech detection. A parameter computation system configured to calculate cepstral parameters, energy parameters and other suitable parameters for speech detection. A speech/non-speech classification system configured to classify individual frames as speech frames or non-speech frames, based on the computed parameters and the adaptive background statistical model data. A background statistics update system configured to update the background statistical model based on detected speech and non-speech frames. A second speech detection system configured to perform speech detection processing and to generate a suitable indicator for use in processing audio data that is determined to include speech signals.

Abstract translation: 一种用于音频处理的系统，包括初始背景统计模型系统，其被配置为使用音频数据的预定样本大小来生成初始背景统计模型。 参数计算系统，被配置为产生包括倒谱和能量参数的音频数据的参数数据。 背景统计计算系统，被配置为生成用于确定是否已经检测到语音的初步背景统计。 第一语音检测系统，被配置为确定音频数据的初始采样中是否存在语音。 一种自适应背景统计模型系统，被配置为提供用于语音检测的音频数据的连续处理中的自适应背景统计模型。 一种参数计算系统，被配置为计算语音检测的倒谱参数，能量参数和其他合适的参数。 一种语音/非语音分类系统，被配置为基于所计算的参数和自适应背景统计模型数据将各个帧分类为语音帧或非语音帧。 背景统计更新系统，被配置为基于检测到的语音和非语音帧来更新背景统计模型。 第二语音检测系统，被配置为执行语音检测处理并且生成用于处理被确定为包括语音信号的音频数据的合适的指示符。

公开(公告)号：US09654894B2

公开(公告)日：2017-05-16

申请号：US14507662

申请日：2014-10-06

Applicant: Conexant Systems, Inc.

Inventor： Francesco Nesta ,  Trausti Thormundsson ,  Willie Wu

IPC: H04R5/00 ,  H04S7/00 ,  H04R3/00 ,  G10L21/0208 ,  G10L21/0272 ,  G10L21/0216

CPC classification number: H04R3/005 ,  G10L21/0208 ,  G10L21/0272 ,  G10L2021/02161 ,  G10L2021/02166 ,  H04R2430/03 ,  H04S7/305 ,  H04S2400/15 ,  H04S2420/07

Abstract: A selective audio source enhancement system includes a processor and a memory, and a pre-processing unit configured to receive audio data including a target audio signal, and to perform sub-band domain decomposition of the audio data to generate buffered outputs. In addition, the system includes a target source detection unit configured to receive the buffered outputs, and to generate a target presence probability corresponding to the target audio signal, as well as a spatial filter estimation unit configured to receive the target presence probability, and to transform frames buffered in each sub-band into a higher resolution frequency-domain. The system also includes a spectral filtering unit configured to retrieve a multichannel image of the target audio signal and noise signals associated with the target audio signal, and an audio synthesis unit configured to extract an enhanced mono signal corresponding to the target audio signal from the multichannel image.

公开(公告)号：US09564144B2

公开(公告)日：2017-02-07

申请号：US14809137

申请日：2015-07-24

Applicant: CONEXANT SYSTEMS, INC.

Inventor： Francesco Nesta ,  Trausti Thormundsson

IPC: H04R3/00 ,  G10L19/02 ,  G10L19/26 ,  G10L19/008

CPC classification number: G10L19/26 ,  G10L19/008 ,  G10L19/02 ,  G10L21/0216 ,  G10L2021/02166 ,  H04R3/005 ,  H04R2430/03

Abstract: A system for processing audio data comprising a linear demixing system configured to receive a plurality of sub-band audio channels and to generate an audio output and a noise output. A spatial likelihood system coupled to the linear demixing system, the spatial likelihood system configured to receive the audio output and the noise output and to generate a spatial likelihood function. A sequential Gaussian mixture model system coupled to the spatial likelihood system, the sequential Gaussian mixture model system configured to generate a plurality of model parameters. A Bayesian probability estimator system configured to receive the plurality of model parameters and a speech/noise presence probability and to generate a noise power spectral density and spectral gains. A spectral filtering system configured to receive the spectral gains and to apply the spectral gains to noisy input mixtures.

Abstract translation: 一种用于处理音频数据的系统，包括被配置为接收多个子带音频通道并产生音频输出和噪声输出的线性分层系统。 耦合到线性分层系统的空间似然系统，被配置为接收音频输出和噪声输出并产生空间似然函数的空间似然系统。 耦合到空间似然系统的连续高斯混合模型系统，被配置为生成多个模型参数的顺序高斯混合模型系统。 贝叶斯概率估计器系统，被配置为接收多个模型参数和语音/噪声存在概率，并产生噪声功率谱密度和频谱增益。 频谱滤波系统，被配置为接收频谱增益并将频谱增益应用于噪声输入混合。

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：US20150117649A1

公开(公告)日：2015-04-30

申请号：US14507662

申请日：2014-10-06

Applicant: Conexant Systems, Inc.

Inventor： Francesco Nesta ,  Trausti Thormundsson ,  Willie Wu

IPC: H04R5/04

CPC classification number: H04R3/005 ,  G10L21/0208 ,  G10L21/0272 ,  G10L2021/02161 ,  G10L2021/02166 ,  H04R2430/03 ,  H04S7/305 ,  H04S2400/15 ,  H04S2420/07

Abstract: A selective audio source enhancement system includes a processor and a memory, and a pre-processing unit configured to receive audio data including a target audio signal, and to perform sub-band domain decomposition of the audio data to generate buffered outputs. In addition, the system includes a target source detection unit configured to receive the buffered outputs, and to generate a target presence probability corresponding to the target audio signal, as well as a spatial filter estimation unit configured to receive the target presence probability, and to transform frames buffered in each sub-band into a higher resolution frequency-domain. The system also includes a spectral filtering unit configured to retrieve a multichannel image of the target audio signal and noise signals associated with the target audio signal, and an audio synthesis unit configured to extract an enhanced mono signal corresponding to the target audio signal from the multichannel image.

Abstract translation: 选择性音频源增强系统包括处理器和存储器，以及预处理单元，其被配置为接收包括目标音频信号的音频数据，并且执行音频数据的子带域分解以产生缓冲输出。 此外，该系统包括：目标源检测单元，被配置为接收缓冲的输出，并且生成与目标音频信号相对应的目标存在概率;以及空间滤波器估计单元，被配置为接收目标存在概率，并且 将每个子带中缓冲的帧转换成更高分辨率的频域。 该系统还包括频谱滤波单元，被配置为检索目标音频信号的多声道图像和与目标音频信号相关联的噪声信号，以及音频合成单元，被配置为从多声道提取对应于目标音频信号的增强单声道信号 图片。

公开(公告)号：US20170206908A1

公开(公告)日：2017-07-20

申请号：US15088073

申请日：2016-03-31

Applicant: CONEXANT SYSTEMS, INC.

Inventor： Francesco Nesta ,  Trausti Thormundsson

IPC: G10L19/025 ,  G10L19/008 ,  G10L19/26

CPC classification number: G10L19/025 ,  G10L19/008 ,  G10L19/26 ,  G10L21/0232 ,  G10L21/028

Abstract: Methods for processing a multichannel audio signal that includes transient noise signals are provided. The method includes buffering the multichannel audio signal in a subband domain, and estimating the subband frames for transient noise likelihood. A probability of transient noise for the buffered subband frames is determined and a multichannel spatial filter is applied to decompose the subband frames to transient attenuated target source and noise estimation cancelled of the target source signal. A spectral filter is applied to the target source frame to enhance the target source frame and the subband frames that are determined to have a probability of the transient noise greater than a first threshold and a probability of target source less than a second threshold are muted.

公开(公告)号：US20170148438A1

公开(公告)日：2017-05-25

申请号：US15356401

申请日：2016-11-18

Applicant: CONEXANT SYSTEMS, INC.

Inventor： Randall Deetz ,  Trausti Thormundsson ,  Stuart Whitfield Hutson ,  Thorarinn Sveinsson ,  Yair Kerner

IPC: G10L15/22 ,  H04L29/06 ,  H04M7/00 ,  G10L15/18 ,  G06F3/16

CPC classification number: G10L15/22 ,  G06F3/165 ,  G10L15/1815 ,  G10L2015/223 ,  G10L2015/228 ,  H04L65/403 ,  H04M3/568 ,  H04M7/006

Abstract: Systems and methods provide input and output mode control for audio processing on a user device. Audio processing may be configured by monitoring audio activity on a device having at least one microphone and a digital audio processing unit, collecting information from the monitoring of the activity, including an identification of at least one application utilizing audio processing, and determining a context for the audio processing, the context including at least one context resource having associated metadata. An audio configuration is determined based on the application and determined context, and an action is performed to control the audio processing mode. User controls providing addition mode control may be displayed automatically based on a current application and determined context.

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：US20150372650A1

公开(公告)日：2015-12-24

申请号：US14842775

申请日：2015-09-01

Applicant: CONEXANT SYSTEMS, INC.

Inventor： Trausti Thormundsson ,  Ragnar H. Jonsson ,  Vilhjalmur S. Thorvaldsson ,  James Walter Wihardja

IPC: H03F1/32 ,  H03F3/187 ,  G10K11/16

CPC classification number: H03F1/3247 ,  G10K11/16 ,  H03F1/26 ,  H03F3/187 ,  H03F2200/372 ,  H03F2200/411 ,  H03F2200/516 ,  H03F2200/78 ,  H03G3/3026 ,  H03G3/3089 ,  H03G5/005 ,  H03G5/165 ,  H03G5/18 ,  H03G7/002 ,  H03G7/08 ,  H03G11/008

Abstract: An audio driver equipped with a distortion compensation unit corrects for detected distortion and includes a digital to analog converter (DAC), an amplifier, and an output driver that drives a loudspeaker. Between the output driver and the loudspeaker, the audio driver can include a series resistor and a differential amplifier to measure the voltage across the resistor. A distortion detection unit can use the detected voltage to determine whether distortion, such as rub and buzz distortion is present. The distortion detection unit can comprise an analog to digital converter (ADC) to digitize the voltage data, an FFT to transform the voltage data into frequency information, a root-mean-square (RMS) module that measures the energy at each frequency, and an analysis module which looks for the distortion signature in the energy spectrum.

Abstract translation: 配备有失真补偿单元的音频驱动器校正检测到的失真，并包括驱动扬声器的数模转换器（DAC），放大器和输出驱动器。 在输出驱动器和扬声器之间，音频驱动器可以包括串联电阻器和差分放大器，以测量电阻器两端的电压。 失真检测单元可以使用检测到的电压来确定是否存在诸如摩擦和嗡嗡声失真的失真。 失真检测单元可以包括用于数字化电压数据的模数转换器（ADC），将电压数据转换成频率信息的FFT，测量每个频率处的能量的均方根（RMS）模块，以及 在能谱中寻找失真特征的分析模块。