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    Echo cancellation and suppression in electronic device
    1.
    发明授权
    Echo cancellation and suppression in electronic device 有权

    公开(公告)号：US10339954B2

    公开(公告)日：2019-07-02

    申请号：US16208451

    申请日：2018-12-03

    Applicant: MOTOROLA MOBILITY LLC

    Inventor： Pratik M. Kamdar ,  Jincheng Wu ,  Joel A. Clark ,  Malay Gupta ,  Plamen A. Ivanov

    IPC: H04R3/00 ,  G10L21/00 ,  G10L21/0232 ,  G10L21/0272 ,  G10L25/84 ,  G10L25/21 ,  G10L21/0316 ,  G10L21/0208

    Abstract: A method includes obtaining, by a processor, an audio echo signal and an audio desired signal from an acoustic echo correction stage of an electronic device, and converting the echo signal and the desired signal to the frequency domain. The method further includes grouping, by the processor, frequency bin results of respective frequency domain converted echo and desired signals into respective echo and desired sub-bands. A sub-band suppressor gain is estimated based on an estimated sub-band energy for the echo and desired sub-bands. The method further includes modulating the frequency domain converted desired signal to compensate for residual echo, the modulating based, at least in part, on the estimated sub-band suppressor gain, and the modulating producing a compensated frequency domain converted echo signal. The method also includes converting the compensated frequency domain converted desired signal into time domain converted audio output signal.

    Electronic Apparatus Having Microphones with Controllable Front-Side Gain and Rear-Side Gain
    2.
    发明申请
    Electronic Apparatus Having Microphones with Controllable Front-Side Gain and Rear-Side Gain 有权
    具有可控的前侧增益和后侧增益的麦克风的电子设备

    公开(公告)号：US20130021503A1

    公开(公告)日：2013-01-24

    申请号：US13626551

    申请日：2012-09-25

    Applicant: Motorola Mobility LLC

    Inventor： Robert A. Zurek ,  Kevin J. Bastyr ,  Joel A. Clark ,  Plamen A. Ivanov

    IPC: H04R3/00 ,  H04N5/232 ,  H04N5/225

    CPC classification number: H04R1/406 ,  H04R2201/401 ,  H04R2430/01 ,  H04R2499/11

    Abstract: An electronic apparatus is provided that has a rear-side and a front-side, a first microphone that generates a first signal, and a second microphone that generates a second signal. An automated balance controller generates a balancing signal based on a proximity sensor signal. A processor processes the first and second signals to generate at least one beamformed audio signal, where an audio level difference between a front-side gain and a rear-side gain of the beamformed audio signal is controlled during processing based on the balancing signal.

    Abstract translation: 提供一种电子设备，其具有后侧和前侧，产生第一信号的第一麦克风和产生第二信号的第二麦克风。 自动平衡控制器基于接近传感器信号产生平衡信号。 A处理器处理第一和第二信号以产生至少一个波束形成的音频信号，其中基于平衡信号在处理期间控制波束形成的音频信号的前侧增益和后侧增益之间的音频电平差。

    Pre-selectable and dynamic configurable multistage echo control system for large range level of acoustic echo
    3.
    发明授权
    Pre-selectable and dynamic configurable multistage echo control system for large range level of acoustic echo 有权

    公开(公告)号：US10446169B1

    公开(公告)日：2019-10-15

    申请号：US15935204

    申请日：2018-03-26

    Applicant: MOTOROLA MOBILITY LLC

    Inventor： Pratik M. Kamdar ,  Jincheng Wu ,  Joel A. Clark

    IPC: G10L21/0208 ,  G10K11/16

    Abstract: A method for controlling echo of a voice recognition system includes receiving at least two audio input signals corresponding to sound sensed by at least two microphones in a physical space. A first audio input signal of the at least two audio input signals is received on a primary channel, and each remaining audio input signal is received through a respective secondary channel. The method includes selecting, by a processor, based on an echo power level of a speaker in the physical space, a subset of echo control functions (ECFs) from among a plurality of ECFs of a multistage echo control system. Each ECF modifies the at least two audio input signals to reduce echo. The method includes generating a corresponding number of audio output signals by processing the signals received on the primary and secondary channels through the selected subset of ECFs, and outputting the audio output signals.

    Method and Apparatus for Mitigating False Accepts of Trigger Phrases
    4.
    发明申请
    Method and Apparatus for Mitigating False Accepts of Trigger Phrases 有权
    用于减轻触发短语错误接受的方法和装置

    公开(公告)号：US20150039310A1

    公开(公告)日：2015-02-05

    申请号：US14050594

    申请日：2013-10-10

    Applicant: Motorola Mobility LLC

    Inventor： Joel A. Clark ,  Tenkasi V. Rambadran ,  Mark A. Jasiuk

    IPC: G10L15/06

    CPC classification number: G10L15/063 ,  G10L15/20 ,  G10L15/22 ,  G10L2025/783

    Abstract: An electronic device includes a microphone that receives an audio signal, and a processor that is electrically coupled to the microphone. The processor detects a trigger phrase in the received audio signal and measure characteristics of the detected trigger phrase. Based on the measured characteristics of the detected trigger phrase, the processor determines whether the detected trigger phrase is valid.

    Abstract translation: 电子设备包括接收音频信号的麦克风和电耦合到麦克风的处理器。 处理器检测所接收的音频信号中的触发短语并测量检测到的触发短语的特征。 基于检测到的触发短语的测量特性，处理器确定检测到的触发短语是否有效。

    Apparatus and Method for Power Efficient Signal Conditioning for a Voice Recognition System
    5.
    发明申请
    Apparatus and Method for Power Efficient Signal Conditioning for a Voice Recognition System 审中-公开
    用于语音识别系统的高效信号调理的装置和方法

    公开(公告)号：US20140278393A1

    公开(公告)日：2014-09-18

    申请号：US13955186

    申请日：2013-07-31

    Applicant: Motorola Mobility LLC

    Inventor： Plamen A. Ivanov ,  Kevin J. Bastry ,  Joel A. Clark ,  Mark A. Jasiuk ,  Tenkasi V. Ramabadran ,  Jincheng Wu

    IPC: G10L15/20

    CPC classification number: G10L15/20 ,  G10L15/28 ,  G10L21/0202 ,  G10L21/0216 ,  G10L21/0364 ,  G10L25/21 ,  G10L2021/02161

    Abstract: A disclosed method includes monitoring an audio signal energy level while having a plurality of signal processing components deactivated and activating at least one signal processing component in response to a detected change in the audio signal energy level. The method may include activating and running a voice activity detector on the audio signal in response to the detected change where the voice activity detector is the at least one signal processing component. The method may further include activating and running the noise suppressor only if a noise estimator determines that noise suppression is required. The method may activate and runs a noise type classifier to determine the noise type based on information received from the noise estimator and may select a noise suppressor algorithm, from a group of available noise suppressor algorithms, where the selected noise suppressor algorithm is the most power consumption efficient.

    Abstract translation: 所公开的方法包括：监测音频信号能级，同时响应于检测到的音频信号能量级的变化，使多个信号处理组件被去激活并激活至少一个信号处理组件。 该方法可以包括响应于检测到的改变而激活和运行音频信号上的语音活动检测器，其中语音活动检测器是至少一个信号处理组件。 该方法还可以包括仅当噪声估计器确定需要噪声抑制时激活和运行噪声抑制器。 该方法可以激活和运行噪声类型分类器，以基于从噪声估计器接收的信息来确定噪声类型，并且可以从一组可用的噪声抑制器算法中选择噪声抑制算法，其中所选择的噪声抑制器算法是最大功率 消费高效。

    Method and Apparatus for Adjusting Trigger Parameters for Voice Recognition Processing Based on Noise Characteristics
    6.
    发明申请
    Method and Apparatus for Adjusting Trigger Parameters for Voice Recognition Processing Based on Noise Characteristics 审中-公开
    基于噪声特性调整语音识别处理触发参数的方法和装置

    公开(公告)号：US20140278389A1

    公开(公告)日：2014-09-18

    申请号：US14142177

    申请日：2013-12-27

    Applicant: Motorola Mobility LLC

    Inventor： Robert A. Zurek ,  Joel A. Clark ,  Pratik M. Kamdar ,  Snehitha Singaraju

    IPC: G10L15/22

    CPC classification number: G10L15/20

    Abstract: A method and apparatus for adjusting a trigger parameter related to voice recognition processing includes receiving into the device an acoustic signal comprising a speech signal, which is provided to a voice recognition module, and comprising noise. The method further includes determining a noise profile for the acoustic signal, wherein the noise profile identifies a noise level for the noise and identifies a noise type for the noise based on a frequency spectrum for the noise, and adjusting the voice recognition module based on the noise profile by adjusting a trigger parameter related to voice recognition processing.

    Abstract translation: 一种用于调整与语音识别处理相关的触发参数的方法和装置，包括：将包括提供给语音识别模块的语音信号和包含噪声的声音信号接收到该设备中。 所述方法还包括确定所述声信号的噪声分布，其中所述噪声分布识别所述噪声的噪声水平，并且基于所述噪声的频谱识别所述噪声的噪声类型，以及基于所述噪声分布调整所述语音识别模块 通过调整与语音识别处理相关的触发参数来进行噪声分析。

    Reducing noise in audio signals
    7.
    发明授权
    Reducing noise in audio signals 有权

    公开(公告)号：US10455319B1

    公开(公告)日：2019-10-22

    申请号：US16039094

    申请日：2018-07-18

    Applicant: MOTOROLA MOBILITY LLC

    Inventor： Jincheng Wu ,  Joel A. Clark ,  Malay Gupta ,  Plamen A. Ivanov

    IPC: H04R3/04 ,  G10L21/0232 ,  H04R1/22 ,  H04R29/00 ,  G10L21/0216

    Abstract: A method, a system, and a computer program product reducing noise in audio received by at least one microphone. The method includes determining, from an audio signal received by at least one primary microphone of an electronic device, whether a user that is proximate to the electronic device is currently speaking. The method further includes, in response to determining that a user is not currently speaking, receiving a first audio using a first microphone subset from among a plurality of microphones and receiving at least one second audio using at least one second microphone subset from among the plurality of microphones. The method further includes generating a composite signal from the first audio and the second audio. The method further includes collectively processing the audio signal and the composite signal to generate a modified audio signal having a reduced level of noise.

    Echo cancellation and suppression in electronic device
    8.
    发明授权
    Echo cancellation and suppression in electronic device 有权

    公开(公告)号：US10192567B1

    公开(公告)日：2019-01-29

    申请号：US15921555

    申请日：2018-03-14

    Applicant: MOTOROLA MOBILITY LLC

    Inventor： Pratik M. Kamdar ,  Jincheng Wu ,  Joel A. Clark ,  Malay Gupta ,  Plamen A. Ivanov

    IPC: H04R3/00 ,  G10L21/02 ,  H04B3/20 ,  G10L21/0232 ,  G10L25/84 ,  G10L25/21 ,  G10L21/0316 ,  G10L21/0272 ,  G10L21/0208

    Abstract: A portable device performs echo cancellation and echo suppression. An audio echo signal and an audio desired signal are obtained from an acoustic echo correction stage of the portable device. The echo and desired signals are converted to the frequency domain. Frequency bin results of the respective frequency domain converted echo and desired signals are grouped into echo and desired sub-bands. A sub-band suppressor gain is estimated based on the estimated sub-band energy for the echo and desired sub-bands. The frequency domain converted echo signal is modulated based at least in part on the estimated sub-band suppressor gain to compensate for residual echo. The compensated frequency domain converted echo signal is time domain converted into an audio output signal. The audio output signal is processed by a selected one of a voice recognition engine and a communication module transmitter.

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