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

IPC: H04N7/15 ,  H04N5/232

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。

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

IPC: H04R3/00 ,  H04R3/04

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。

公开(公告)号：US20150156395A1

公开(公告)日：2015-06-04

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

IPC: H04N5/232

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。

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

IPC: A61F11/06 ,  H04R1/10 ,  H04R3/02 ,  H04R3/04

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.

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

IPC: H04R3/00 ,  H04M3/56 ,  H04N7/15

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。