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.

公开(公告)号：US20140350924A1

公开(公告)日：2014-11-27

申请号：US14164354

申请日：2014-01-27

Applicant: Motorola Mobility LLC

Inventor： Robert A. Zurek ,  Adrian M. Schuster ,  Fu-Lin Shau ,  Jincheng Wu

IPC: G10L15/22

CPC classification number: G10L15/22 ,  B60N2/002 ,  G06F3/013 ,  G06K9/00255 ,  G06K9/00335 ,  G06K9/00597 ,  G06K9/00604 ,  G06K9/00832 ,  G10L15/20 ,  G10L15/24 ,  G10L15/25 ,  G10L15/26 ,  G10L21/0208 ,  G10L25/78 ,  G10L2015/223 ,  G10L2015/227 ,  G10L2021/02166 ,  H04R2430/20 ,  H04R2460/07 ,  H04R2499/11

Abstract: A device performs a method for using image data to aid voice recognition. The method includes the device capturing image data of a vicinity of the device and adjusting, based on the image data, a set of parameters for voice recognition performed by the device. The set of parameters for the device performing voice recognition include, but are not limited to: a trigger threshold of a trigger for voice recognition; a set of beamforming parameters; a database for voice recognition; and/or an algorithm for voice recognition, wherein the algorithm can include using noise suppression or using acoustic beamforming.

Abstract translation: 设备执行使用图像数据来辅助语音识别的方法。 该方法包括：设备捕获设备附近的图像数据，并且基于图像数据调整由该设备执行的语音识别的一组参数。 执行语音识别的设备的参数集合包括但不限于：用于语音识别的触发的触发阈值; 一组波束成形参数; 用于语音识别的数据库; 和/或用于语音识别的算法，其中所述算法可以包括使用噪声抑制或使用声波波束形成。

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。

公开(公告)号：US20140274218A1

公开(公告)日：2014-09-18

申请号：US14204533

申请日：2014-03-11

Applicant: Motorola Mobility LLC

Inventor： Sanjay N. Kadiwala ,  Joseph C. Dwyer ,  Jincheng Wu

IPC: G10K11/16 ,  H04M1/60

CPC classification number: G10L15/22 ,  G10K11/341 ,  G10K2200/10 ,  G10L15/02 ,  G10L15/08 ,  G10L21/0208 ,  G10L2015/088 ,  G10L2015/223 ,  G10L2021/02082 ,  G10L2021/02166 ,  H04M1/6041 ,  H04M9/082 ,  H04R3/005 ,  H04R29/005 ,  H04R2203/12 ,  H04R2430/20 ,  H04R2499/11

Abstract: A method includes cycling through a plurality of microphone and speaker combinations in a mobile device in response to the mobile device being placed in speakerphone mode. The mobile device includes a plurality of microphones and at least one speaker. The method obtains acoustic echo data from an echo canceller for each microphone and speaker combination, calculates an acoustic isolation value for each combination and then selects a microphone and speaker combination based on the acoustic isolation value. The method may also include determining an echo spectrum for each microphone and speaker combination using the obtained acoustic echo data, and select an echo control profile based on a characteristic of the echo spectrum. The echo control profile is selected to further improve acoustic isolation for the selected microphone and speaker combination.

Abstract translation: 一种方法包括响应于移动设备被放置在扬声器电话模式，循环通过移动设备中的多个麦克风和扬声器组合。 移动设备包括多个麦克风和至少一个扬声器。 该方法从每个麦克风和扬声器组合的回波消除器获得声学回波数据，计算每个组合的声学隔离值，然后基于声学隔离值选择麦克风和扬声器组合。 该方法还可以包括使用获得的声学回波数据确定每个麦克风和扬声器组合的回波频谱，并且基于回波频谱的特性来选择回波控制曲线。 选择回波控制曲线以进一步改善所选麦克风和扬声器组合的隔音。

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.

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.

公开(公告)号：US10733990B2

公开(公告)日：2020-08-04

申请号：US15884353

申请日：2018-01-30

Applicant: MOTOROLA MOBILITY LLC

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

IPC: G10L15/00 ,  G10L15/22 ,  G10L15/08

Abstract: A method, a system, and a computer program product for preventing initiation of a voice recognition session. The method includes monitoring at least one audio output channel for at least one audio trigger phrase that initiates a voice recognition session. The method further includes in response to detecting the at least one audio trigger phrase on the at least one audio output channel, setting a logic state of at least one output trigger detector of the at least one audio output channel to a first state. The method further includes gating a logic state of at least one input trigger detector of at least one audio input channel to the first state for a time period and preventing initiation of a voice recognition session by the at least one audio trigger phrase on the at least one audio input channel while the logic state is the first state.

公开(公告)号：US10665234B2

公开(公告)日：2020-05-26

申请号：US15883368

申请日：2018-01-30

Applicant: MOTOROLA MOBILITY LLC

Inventor： Robert A. Zurek ,  Pratik M. Kamdar ,  Jincheng Wu ,  Joel Clark ,  Plamen Ivanov

IPC: G10L15/22 ,  G06F3/16 ,  G10L17/22 ,  H04R1/40 ,  H04R3/00

Abstract: A method, a system, and a computer program product for detecting an audio trigger phrase at a particular audio input channel and initiating a voice recognition session. The method includes capturing audio content by a plurality of microphone pairs of an audio capturing device, wherein each microphone pair of the plurality of microphone pairs is associated with an audio input channel of a plurality of audio input channels of the audio capturing device. The method further includes simultaneously monitoring, by a processor of the audio capturing device, audio content on each of the audio input channels. The method further includes: independently detecting, by the processor, an audio trigger phrase on at least one audio input channel of the plurality of audio input channels; and in response to detecting the audio trigger phrase, commencing a voice recognition session using the at least one audio input channel as an audio source.

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.

公开(公告)号：US20140270202A1

公开(公告)日：2014-09-18

申请号：US13955183

申请日：2013-07-31

Applicant: Motorola Mobility LLC

Inventor： Plamen A Ivanov ,  Kevin J Bastyr ,  Joel A Clark ,  Rivanaldo S Oliveira ,  Snehitha Singaraju ,  Jincheng Wu

IPC: H04R29/00 ,  G10L15/00

CPC classification number: H04R29/005 ,  G01N29/44 ,  G10K11/178 ,  G10L21/02 ,  H04M1/03 ,  H04M1/6041 ,  H04M2250/12 ,  H04R3/005 ,  H04R29/004 ,  H04R2430/20 ,  H04R2499/11

Abstract: A method includes detecting a surface in proximity to a mobile device using sensor data and determining an acoustic reflectivity or acoustic absorptivity of the surface using the sensor data. The method may further compensate for the acoustic reflectivity or acoustic absorptivity by controlling a configurable group of microphones of the mobile device. Compensating for the surface acoustic reflectivity or acoustic absorptivity may include beamforming the outputs of the configurable group of microphones to obtain one of an omnidirectional beamform pattern or a directional beamform pattern. An apparatus that performs the method include a configurable group of microphones, a signal conditioner, and a surface compensator. The surface compensator is operative to detect a surface in proximity to the apparatus and determine a surface acoustic reflectivity or acoustic absorptivity.

Abstract translation: 一种方法包括使用传感器数据检测靠近移动设备的表面，并使用传感器数据确定表面的声反射率或声吸收率。 该方法可以通过控制移动设备的可配置的麦克风组来进一步补偿声反射率或声吸收率。 对表面声反射率或声吸收率的补偿可以包括波束成形麦克风的可配置组的输出，以获得全向波束形图案或定向波束形图案之一。 执行该方法的装置包括可配置的麦克风组，信号调节器和表面补偿器。 表面补偿器可操作以检测靠近设备的表面，并确定表面声反射率或声吸收率。