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公开(公告)号：US10789935B2
公开(公告)日：2020-09-29
申请号：US16242257
申请日：2019-01-08
Applicant: Cisco Technology, Inc.
Inventor： Feng Bao , David William Nolan Robison , Tor A. Sundsbarm
IPC: G10K11/178 , H04R1/10
Abstract: In one example, a headset obtains a first audio signal including a user audio signal from a first microphone on the headset and a second audio signal including the user audio signal from a second microphone on the headset. The headset derives a first candidate signal from the first audio signal and a second candidate signal from the second audio signal. Based on the first audio signal and the second audio signal, the headset determines that a mechanical touch noise is present in one of the first audio signal and the second audio signal. In response to determining that the mechanical touch noise is present in one of the first audio signal and the second audio signal, the headset selects an output audio signal from a plurality of candidate signals including the first candidate signal and the second candidate signal. Headset provides the output audio signal to a receiver device.
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公开(公告)号：US20150201278A1
公开(公告)日：2015-07-16
申请号：US14154975
申请日：2014-01-14
Applicant: CISCO TECHNOLOGY, INC.
Inventor： Feng Bao , Subrahmanyam Kunapuli , Fei Yang , Tor Sundsbarm
CPC classification number: H04R3/005 , H04M3/568 , H04M2203/509 , H04N7/15
Abstract: A processing system can include tracking microphone array(s), audio-tracking circuitry configured to detect a location of audio sources from audio signals from the array(s), and processing circuitry. The processing circuitry can be configured to: identify a first microphone that has a strongest signal strength; estimate a location of an active speaker based on at least an output of the audio-tracking circuitry; determine whether a second microphone for the active speaker is affected by an acoustic obstacle based on the location of the active speaker and a location of the first microphone that has the strongest signal strength; estimate attenuation for microphones based on a comparison of actual signal strengths of the microphones with estimated signal strengths of the microphones that are estimated based on microphone signals of the second microphone for the active speaker; and modify the attenuation based on an estimated location of the acoustic obstacle.
Abstract translation: 处理系统可以包括跟踪麦克风阵列，被配置为从来自阵列的音频信号和处理电路检测音频源的位置的音频跟踪电路。 处理电路可以被配置为：识别具有最强信号强度的第一麦克风; 至少基于音频跟踪电路的输出来估计有源扬声器的位置; 基于有源扬声器的位置和具有最强信号强度的第一麦克风的位置，确定主动扬声器的第二麦克风是否受到声学障碍物的影响; 基于麦克风的实际信号强度与基于用于主动扬声器的第二麦克风的麦克风信号估计的麦克风的估计信号强度进行比较来估计麦克风的衰减; 并且基于声学障碍物的估计位置来修改衰减。
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公开(公告)号：US20200219479A1
公开(公告)日：2020-07-09
申请号：US16242257
申请日：2019-01-08
Applicant: Cisco Technology, Inc.
Inventor： Feng Bao , David William Nolan Robison , Tor A. Sundsbarm
IPC: G10K11/178 , H04R1/10
Abstract: In one example, a headset obtains a first audio signal including a user audio signal from a first microphone on the headset and a second audio signal including the user audio signal from a second microphone on the headset. The headset derives a first candidate signal from the first audio signal and a second candidate signal from the second audio signal. Based on the first audio signal and the second audio signal, the headset determines that a mechanical touch noise is present in one of the first audio signal and the second audio signal. In response to determining that the mechanical touch noise is present in one of the first audio signal and the second audio signal, the headset selects an output audio signal from a plurality of candidate signals including the first candidate signal and the second candidate signal. Headset provides the output audio signal to a receiver device.
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公开(公告)号：US10051353B2
公开(公告)日：2018-08-14
申请号：US15454212
申请日：2017-03-09
Applicant: Cisco Technology, Inc.
Inventor： David William Nolan Robison , Kevin Lee Hughes , Feng Bao , Stephen Lee Ijams , Victor Manuel Sanchez , David M. Sanguinet
CPC classification number: H04R1/2857 , H04R1/342 , H04R1/406 , H04R19/016
Abstract: Presented herein is an audio endpoint for telecommunication operations, sometimes referred to herein as a “telecommunications audio endpoint” or, more, simply as an “audio endpoint.” According to at least one example, the audio endpoint presented herein includes a base, a speaker, a speaker waveguide, a microphone waveguide, and two or more microphones. The base is configured to engage a support surface (i.e., a table) and the speaker is configured to emit sounds (i.e., fire) in a direction of the base. The speaker waveguide is disposed between the speaker and the microphone waveguide, while the microphone waveguide is disposed between the speaker waveguide and the base. The two or more microphones are disposed within the microphone waveguide and are proximate to the base. In general, the speaker waveguide is configured to guide sounds output by the speaker in general radially (outward) directions.
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5.发明授权Acoustic echo cancellation for microphone array with dynamically changing beam forming 有权用于具有动态变化的波束形成的麦克风阵列的声学回波消除公开(公告)号：US09549079B2
公开(公告)日：2017-01-17
申请号：US14018635
申请日：2013-09-05
Applicant: Cisco Technology, Inc.
Inventor： Feng Bao , Subrahmanyam Venkata Kunapuli , Fei Yang , Xiangyu Bao , Tor A. Sundsbarm
CPC classification number: H04M9/082 , G10K11/346
Abstract: Acoustic echo cancellation is improved by receiving a speaker signal that is used to produce audio in a room, and receiving audio signals that capture audio from an array of microphones in the room, including an acoustic echo from the speakers. To cancel the acoustic echo, one adaptive filter is associated with a corresponding subspace in the room. Each of the audio signals is assigned to at least one of the adaptive filters, and a set of coefficients is iteratively determined for each of the adaptive filters. The coefficients for an adaptive filter are determined by selecting each of the audio signals assigned to that adaptive filter and adapting the filter to remove an acoustic echo from each of the selected audio signals. At each iteration, a different audio signal is selected from the audio signals assigned to the adaptive filter in order to determine the set of coefficients.
Abstract translation: 通过接收用于在房间中产生音频的扬声器信号以及接收从房间中的麦克风阵列捕获音频的音频信号（包括来自扬声器的声学回声）来改善声学回声消除。 为了消除声学回声，一个自适应滤波器与房间中相应的子空间相关联。 每个音频信号被分配给至少一个自适应滤波器，并且针对每个自适应滤波器迭代地确定一组系数。 用于自适应滤波器的系数通过选择分配给该自适应滤波器的每个音频信号并且适配滤波器以从每个所选择的音频信号中去除声学回声来确定。 在每次迭代中，从分配给自适应滤波器的音频信号中选择不同的音频信号，以便确定该系数集合。
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Patent Agency Ranking
6.发明申请Acoustic Echo Cancellation for Microphone Array with Dynamically Changing Beam Forming 有权具有动态变化的波束形成的麦克风阵列的声学回声消除公开(公告)号：US20150063579A1
公开(公告)日：2015-03-05
申请号：US14018635
申请日：2013-09-05
Applicant: Cisco Technology, Inc.
Inventor： Feng Bao , Subrahmanyam Venkata Kunapuli , Fei Yang , Xiangyu Bao , Tor A. Sundsbarm
IPC: G10K11/16
CPC classification number: H04M9/082 , G10K11/346
Abstract: Acoustic echo cancellation is improved by receiving a speaker signal that is used to produce audio in a room, and receiving audio signals that capture audio from an array of microphones in the room, including an acoustic echo from the speakers. To cancel the acoustic echo, one adaptive filter is associated with a corresponding subspace in the room. Each of the audio signals is assigned to at least one of the adaptive filters, and a set of coefficients is iteratively determined for each of the adaptive filters. The coefficients for an adaptive filter are determined by selecting each of the audio signals assigned to that adaptive filter and adapting the filter to remove an acoustic echo from each of the selected audio signals. At each iteration, a different audio signal is selected from the audio signals assigned to the adaptive filter in order to determine the set of coefficients.
Abstract translation: 通过接收用于在房间中产生音频的扬声器信号以及接收从房间中的麦克风阵列捕获音频的音频信号（包括来自扬声器的声学回声）来改善声学回声消除。 为了消除声学回声，一个自适应滤波器与房间中相应的子空间相关联。 每个音频信号被分配给至少一个自适应滤波器，并且针对每个自适应滤波器迭代地确定一组系数。 用于自适应滤波器的系数通过选择分配给该自适应滤波器的每个音频信号并且适配滤波器以从每个所选择的音频信号中去除声学回声来确定。 在每次迭代中，从分配给自适应滤波器的音频信号中选择不同的音频信号，以便确定该系数集合。
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公开(公告)号：US20190166257A1
公开(公告)日：2019-05-30
申请号：US15827457
申请日：2017-11-30
Applicant: Cisco Technology, Inc.
Inventor： David William Nolan Robison , Kevin Lee Hughes , Feng Bao
IPC: H04M9/08 , G10L21/0208 , H04R1/08 , H04R1/22 , H04R1/28
Abstract: Presented herein is an audio endpoint for telecommunication operations with increased echo rejection. According to one example, the audio endpoint includes a housing body, an upper speaker assembly, a lower speaker assembly, and at least one microphone assembly. The upper speaker assembly is disposed near a top portion of the housing body and has an effective frequency range above a first frequency. The lower speaker assembly is disposed near a bottom portion of the housing body and has an effective frequency range below a second frequency. The microphone assembly includes a first microphone element and a second microphone element. The first microphone element is above the second microphone element so that they are vertically aligned. The first microphone element has an effective frequency range below the first frequency and the second microphone element has an effective frequency range above the second frequency.
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8.发明授权Whiteboard activity noise detection system for immersive telepresence systems 有权用于沉浸式远程呈现系统的白板活动噪声检测系统公开(公告)号：US09426373B2
公开(公告)日：2016-08-23
申请号：US14096885
申请日：2013-12-04
Applicant: Cisco Technology, Inc.
Inventor： Feng Bao , Subrahmanyam Venkata Kunapuli , Fei Yang , Tor Sundsbarm , David Paul Wunsch Desrosiers , Olin Daniel Williford, Jr. , David Michael Sanguinet
CPC classification number: H04N5/23296 , H04N5/232
Abstract: In one embodiment, a method includes obtaining a first signal from a first microphone, and determining when the first signal is indicative of activity on a first surface. The method also includes controlling a camera to focus on the first surface when it is determined that the first signal indicates the activity on the first surface. In such an embodiment, the first microphone and the camera may be part of a collaboration system, and the first surface may be a surface of a whiteboard.
Abstract translation: 在一个实施例中，一种方法包括从第一麦克风获取第一信号，以及确定第一信号何时指示第一表面上的活动。 当确定第一信号指示第一表面上的活动时，该方法还包括控制相机聚焦在第一表面上。 在这样的实施例中，第一麦克风和相机可以是协作系统的一部分，并且第一表面可以是白板的表面。
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9.发明申请ACOUSTIC ECHO CANCELLATION FOR AUDIO SYSTEM WITH BRING YOUR OWN DEVICES (BYOD) 审中-公开音响系统取消您自己的设备（BYOD）公开(公告)号：US20160205262A1
公开(公告)日：2016-07-14
申请号：US15073799
申请日：2016-03-18
Applicant: Cisco Technology, Inc.
Inventor： Feng Bao , Subrahmanyam Venkata Kunapuli , Fei Yang , Tor A. Sundsbarm
IPC: H04M9/08 , G10K11/178 , H04R3/02 , H04M3/56 , H04R3/00
CPC classification number: H04M9/082 , G10K11/178 , G10K2210/108 , G10K2210/3018 , G10K2210/3023 , H04M3/568 , H04M2203/509 , H04M2207/18 , H04R3/005 , H04R3/02 , H04R2499/11 , H04W88/02
Abstract: A controller for the conference session generates a speaker signal for speakers in a conference room. The controller correlates the speaker signal with network timing information and generates speaker timing information. The controller transmits the correlated speaker signal and timing information to a mobile device participating in the conference session. The mobile device generates an echo cancelled microphone signal from a microphone of the mobile device, and transmits the echo cancelled signal back to the controller. The controller also receives array microphone signals associated with an array of microphones at known positions in the room. The controller estimates a relative location of the mobile device within the conference room. The controller dynamically selects as audio output corresponding to the mobile device location either the echo cancelled microphone signal from the mobile device or an echo cancelled array microphone signal associated with the relative location of the mobile device.
Abstract translation: 用于会议会话的控制器为会议室中的扬声器生成扬声器信号。 控制器将扬声器信号与网络定时信息相关联，并产生扬声器定时信息。 控制器将相关的扬声器信号和定时信息发送到参与会议会话的移动设备。 移动设备从移动设备的麦克风产生回声消除的麦克风信号，并将回声消除的信号发送回控制器。 控制器还接收与房间中已知位置处的麦克风阵列相关联的阵列麦克风信号。 控制器估计移动设备在会议室内的相对位置。 控制器动态地选择与移动设备位置相对应的音频输出，即来自移动设备的回波消除的麦克风信号或与移动设备的相对位置相关联的回波消除的阵列麦克风信号。
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10.发明申请System and Method for Clock Synchronization of Acoustic Echo Canceller (AEC) with Different Sampling Clocks for Speakers and Microphones 有权用于扬声器和麦克风的不同采样时钟的声学回声消除器（AEC）的时钟同步的系统和方法公开(公告)号：US20140112466A1
公开(公告)日：2014-04-24
申请号：US13657908
申请日：2012-10-23
Applicant: CISCO TECHNOLOGY, INC.
Inventor： Feng Bao , J. William Mauchly , Subrahmanyam Kunapuli , Xiangyu Bao
CPC classification number: H04R1/2869 , H04M9/082
Abstract: Clock synchronization for an acoustic echo canceller (AEC) with a speaker and a microphone connected over a digital link may be provided. A clock difference may be estimated by analyzing the speaker signal and the microphone signal in the digital domain. The clock synchronization may be combined in both hardware and software. This synchronization may be performed in two stages, first with coarse synchronization in hardware, then fine synchronization in software with, for example, a re-sampler.
Abstract translation: 可以提供具有通过数字链路连接的扬声器和麦克风的声学回声消除器（AEC）的时钟同步。 可以通过分析数字域中的扬声器信号和麦克风信号来估计时钟差。 时钟同步可以在硬件和软件两者中组合。 该同步可以分两个阶段执行，首先是硬件中的粗略同步，然后在软件中与例如重新采样器进行精细同步。
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