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公开(公告)号：US11303998B1
公开(公告)日：2022-04-12
申请号：US17171124
申请日：2021-02-09
Applicant: Cisco Technology, Inc.
Inventor： Feng Bao , Jian Zou , Faisal Haq
Abstract: Disclosed herein are techniques for determining a wearing position of a boomless headset. An earpiece of the boomless headset can include at least one local talker (LT) microphone and a reference microphone. The LT microphone(s) are disposed substantially in a first end of the earpiece closest to a mouth of a LT when the LT wears the earpiece. The reference microphone is disposed substantially in a second end of the earpiece, furthest from the mouth of the LT when the LT wears the earpiece. A signal strength measurement (SSM) for a local talker audio signal to the LT microphone(s) and a SSM for a signal to the reference microphone are obtained. Signal processing logic can determine whether the earpiece is worn at an incorrect ear based on whether a difference between the SSM for the LT microphone(s) and the SSM for the reference microphone is below a predetermined threshold.
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公开(公告)号：US10771887B2
公开(公告)日：2020-09-08
申请号：US16229693
申请日：2018-12-21
Applicant: Cisco Technology, Inc.
Inventor： Feng Bao , David William Nolan Robison , Jian Zou , Tor Sundsbarm
Abstract: In one example, a headset obtains, from a first microphone on the headset, a first audio signal including a user audio signal and an anisotropic background audio signal. The headset obtains, from a second microphone on the headset, a second audio signal including the user audio signal and the anisotropic background audio signal. The headset extracts, from the first audio signal and the second audio signal, using a first adaptive filter, a reference audio signal including the anisotropic background audio signal. Based on the reference signal, the headset cancels, using a second adaptive filter, the anisotropic background audio signal from a third audio signal derived from the first and second audio signals to produce an output audio signal. The headset provides the output audio signal to a receiver device.
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公开(公告)号：US10313786B1
公开(公告)日：2019-06-04
申请号：US16010774
申请日：2018-06-18
Applicant: Cisco Technology, Inc.
Inventor： Feng Bao , David William Nolan Robison , Tor A. Sundsbarm , Fei Yang
IPC: H04R3/00 , G10L21/0232 , H04R1/40
Abstract: A device including an array of bidirectional microphones optimizes the echo rejection of the bidirectional microphones. The microphone array receives audio from an audio source and generates audio signals from each of the bidirectional microphones. The device forms audio beams from combinations of the audio signals generated from the microphone array. Each audio beam captures audio from either its positive polarity zone or its negative polarity zone. The device determines a direction of the audio source and selects a perpendicular audio beam pair based on the direction of the audio source. The perpendicular audio beam pair includes a primary audio beam aimed toward the direction of the audio source and a secondary beam perpendicular to the primary audio beam. The device generates an output signal by combining the primary audio beam with the secondary audio beam based on polarity zone the audio is captured for each audio beam.
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公开(公告)号：US09451360B2
公开(公告)日：2016-09-20
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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15.发明授权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：US09025762B2
公开(公告)日：2015-05-05
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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Patent Agency Ranking
16.发明申请Acoustic Echo Cancellation for Audio System with Bring Your Own Devices (BYOD) 有权带有自己的设备（BYOD）的音频系统的回声消除公开(公告)号：US20150050967A1
公开(公告)日：2015-02-19
申请号：US13967687
申请日：2013-08-15
Applicant: Cisco Technology, Inc
Inventor： Feng Bao , Subrahmanyam Venkata Kunapuli , Fei Yang , Tor A. Sundsbarm
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 receives at least one audio signal to generate a speaker signal. 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 removes acoustic echo from the array microphone signals, and estimates a relative location of the mobile device. The controller dynamically selects as audio output corresponding to the mobile device location either (a) the array microphone signal, or (b) the echo cancelled microphone signal from the mobile device.
Abstract translation: 用于会议会话的控制器接收至少一个音频信号以产生扬声器信号。 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。 控制器从阵列麦克风信号中去除声学回波，并估计移动设备的相对位置。 控制器动态地选择与移动设备位置相对应的音频输出（a）阵列麦克风信号，或（b）来自移动设备的回声消除的麦克风信号。
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公开(公告)号：US10863035B2
公开(公告)日：2020-12-08
申请号：US15827457
申请日：2017-11-30
Applicant: Cisco Technology, Inc.
Inventor： David William Nolan Robison , Kevin Lee Hughes , Feng Bao
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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公开(公告)号：US20180167706A1
公开(公告)日：2018-06-14
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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公开(公告)号：US09894213B2
公开(公告)日：2018-02-13
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
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.
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20.发明授权Acoustic echo cancellation for audio system with bring your own devices (BYOD) 有权音频系统的声学回声消除带有您自己的设备（BYOD）公开(公告)号：US09319532B2
公开(公告)日：2016-04-19
申请号：US13967687
申请日：2013-08-15
Applicant: Cisco Technology, Inc.
Inventor： Feng Bao , Subrahmanyam Venkata Kunapuli , Fei Yang , Tor A. Sundsbarm
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 receives at least one audio signal to generate a speaker signal. 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 removes acoustic echo from the array microphone signals, and estimates a relative location of the mobile device. The controller dynamically selects as audio output corresponding to the mobile device location either (a) the array microphone signal, or (b) the echo cancelled microphone signal from the mobile device.
Abstract translation: 用于会议会话的控制器接收至少一个音频信号以产生扬声器信号。 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。 控制器从阵列麦克风信号中去除声学回波，并估计移动设备的相对位置。 控制器动态地选择与移动设备位置相对应的音频输出（a）阵列麦克风信号，或（b）来自移动设备的回声消除的麦克风信号。
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