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21.发明授权公开(公告)号：US09686605B2
公开(公告)日：2017-06-20
申请号：US14282633
申请日：2014-05-20
Applicant: Cisco Technology, Inc.
Inventor： Haohai Sun
CPC classification number: H04R1/32 , G06K9/00228 , H04R3/005
Abstract: A video conference endpoint detects a face and determines a face angle of the detected face relative to a reference direction based on images captured with a camera. The endpoint determines an angle of arrival of sound (i.e., a sound angle) received at a microphone array that transduces the sound relative to the reference direction based on the transduced sound and a sound speed parameter indicative of a speed of sound in air. The endpoint compares the face angle against the sound angle, and adjusts the sound speed parameter so as to reduce the angle difference if the compare indicates an angle difference greater than zero between the face and sound angles.
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公开(公告)号：US20170171396A1
公开(公告)日：2017-06-15
申请号：US15357015
申请日：2016-11-21
Applicant: Cisco Technology, Inc.
Inventor： Haohai Sun
CPC classification number: H04M9/082 , H04B3/235 , H04M2203/509 , H04R3/005 , H04R2430/20
Abstract: A system and method for joint acoustic echo control and adaptive array processing, comprising the decomposition of a captured sound field into N sub-sound fields, applying linear echo cancellation to each sub-sound field, selecting L sub-sound fields from the N sub-sound fields, performing L channel adaptive array processing utilizing the L selected sub-sound fields, and applying non-linear audio echo cancellation.
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公开(公告)号：US09485574B2
公开(公告)日：2016-11-01
申请号：US14934409
申请日：2015-11-06
Applicant: Cisco Technology, Inc.
Inventor： Haohai Sun , Espen Moberg
CPC classification number: H04R3/005 , H04R1/326 , H04R1/406 , H04R2430/25
Abstract: Systems, processes, devices, apparatuses, algorithms and computer readable medium for suppressing spatial interference using a dual microphone array for receiving, from a first microphone and a second microphone that are separated by a predefined distance, and that are configured to receive source signals, respective first and second microphone signals based on received source signals. A phase difference between the first and the second microphone signals is calculated based on the predefined distance. An angular distance between directions of arrival of the source signals and a desired capture direction is calculated based on the phase difference. Directional-filter coefficients are calculated based on the angular distance. Undesired source signals are filtered from an output based on the directional-filter coefficients.
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Patent Agency Ranking
公开(公告)号：US20160066092A1
公开(公告)日：2016-03-03
申请号：US14934409
申请日：2015-11-06
Applicant: Cisco Technology, Inc.
Inventor： Haohai Sun , Espen Moberg
CPC classification number: H04R3/005 , H04R1/326 , H04R1/406 , H04R2430/25
Abstract: Systems, processes, devices, apparatuses, algorithms and computer readable medium for suppressing spatial interference using a dual microphone array for receiving, from a first microphone and a second microphone that are separated by a predefined distance, and that are configured to receive source signals, respective first and second microphone signals based on received source signals. A phase difference between the first and the second microphone signals is calculated based on the predefined distance. An angular distance between directions of arrival of the source signals and a desired capture direction is calculated based on the phase difference. Directional-filter coefficients are calculated based on the angular distance. Undesired source signals are filtered from an output based on the directional-filter coefficients.
Abstract translation: 用于使用双麦克风阵列抑制空间干扰的系统，过程，设备，装置，算法和计算机可读介质，用于从分离预定距离的第一麦克风和第二麦克风接收并配置为接收源信号， 基于所接收的源信号的相应的第一和第二麦克风信号。 基于预定距离计算第一和第二麦克风信号之间的相位差。 基于相位差计算源信号到达方向与期望捕获方向之间的角距离。 基于角距离计算方向滤波器系数。 基于方向滤波器系数，从输出滤波不期望的源信号。
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公开(公告)号：US09210499B2
公开(公告)日：2015-12-08
申请号：US13713357
申请日：2012-12-13
Applicant: CISCO TECHNOLOGY, INC.
Inventor： Haohai Sun , Espen Moberg
CPC classification number: H04R3/005 , H04R1/326 , H04R1/406 , H04R2430/25
Abstract: Systems, processes, devices, apparatuses, algorithms and computer readable medium for suppressing spatial interference using a dual microphone array for receiving, from a first microphone and a second microphone that are separated by a predefined distance, and that are configured to receive source signals, respective first and second microphone signals based on received source signals. A phase difference between the first and the second microphone signals is calculated based on the predefined distance. An angular distance between directions of arrival of the source signals and a desired capture direction is calculated based on the phase difference. Directional-filter coefficients are calculated based on the angular distance. Undesired source signals are filtered from an output based on the directional-filter coefficients.
Abstract translation: 用于使用双麦克风阵列抑制空间干扰的系统，过程，设备，装置，算法和计算机可读介质，用于从分离预定距离的第一麦克风和第二麦克风接收并配置为接收源信号， 基于所接收的源信号的相应的第一和第二麦克风信号。 基于预定距离计算第一和第二麦克风信号之间的相位差。 基于相位差计算源信号到达方向与期望捕获方向之间的角距离。 基于角距离计算方向滤波器系数。 基于方向滤波器系数，从输出滤波不期望的源信号。
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26.发明申请Determination, Display, and Adjustment of Best Sound Source Placement Region Relative to Microphone 有权最佳声源放置区域相对于麦克风的确定，显示和调整公开(公告)号：US20150350769A1
公开(公告)日：2015-12-03
申请号：US14294667
申请日：2014-06-03
Applicant: Cisco Technology, Inc.
Inventor： Haohai Sun , Bjørn Winsvold , Per Waagø , Amund Holmboe Basmo , Øystein Bredvei
CPC classification number: H04R1/326 , G06K9/00221 , H04L12/1827 , H04M3/56 , H04M2203/509 , H04N5/23206 , H04N5/23212 , H04N5/23219 , H04N5/23222 , H04N5/23293 , H04N5/23296 , H04N5/772 , H04N7/142 , H04N7/147 , H04N7/15 , H04R3/005 , H04R27/00 , H04R29/007 , H04R2201/40
Abstract: A video conference endpoint determines a position of a best audio pick-up region for placement of a sound source relative to a microphone having a receive pattern configured to capture sound signals from the best region. The endpoint captures an image of a scene that encompasses the best region and displays the image of the scene. The endpoint generates an image representative of the best region and displays the generated image representative of the best region as an overlay of the scene image.
Abstract translation: 视频会议端点确定用于放置声源的最佳音频拾取区域相对于具有被配置为从最佳区域捕获声音信号的接收模式的麦克风的位置。 端点捕获包含最佳区域的场景的图像，并显示场景的图像。 端点产生表示最佳区域的图像，并将表示最佳区域的生成图像显示为场景图像的叠加。
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27.发明申请Precise Tracking of Sound Angle of Arrival at a Microphone Array under Air Temperature Variation 有权在空气温度变化下精确跟踪麦克风阵列到达的声角公开(公告)号：US20150341719A1
公开(公告)日：2015-11-26
申请号：US14282633
申请日：2014-05-20
Applicant: Cisco Technology, Inc.
Inventor： Haohai Sun
CPC classification number: H04R1/32 , G06K9/00228 , H04R3/005
Abstract: A video conference endpoint detects a face and determines a face angle of the detected face relative to a reference direction based on images captured with a camera. The endpoint determines an angle of arrival of sound (i.e., a sound angle) received at a microphone array that transduces the sound relative to the reference direction based on the transduced sound and a sound speed parameter indicative of a speed of sound in air. The endpoint compares the face angle against the sound angle, and adjusts the sound speed parameter so as to reduce the angle difference if the compare indicates an angle difference greater than zero between the face and sound angles.
Abstract translation: 视频会议端点根据摄像机拍摄的图像检测脸部并确定检测到的脸部相对于参考方向的脸部角度。 端点确定在麦克风阵列处接收到的声音的到达角度（即，声角），该麦克风阵列基于转换的声音和指示空气中的声速的声速参数来相对于参考方向转换声音。 端点将面角与声角进行比较，并调整声速参数，以便在比较表示在角度和角度之间大于零的角度差时减小角度差异。
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公开(公告)号：US20150109404A1
公开(公告)日：2015-04-23
申请号：US14083684
申请日：2013-11-19
Applicant: CISCO TECHNOLOGY, INC.
Inventor： Haohai Sun , Bjorn Winsvold
IPC: H04N7/15
CPC classification number: H04N7/15
Abstract: Presented herein are techniques for controlling the level of ultrasound pairing signals generated in a teleconferencing environment. The levels of ultrasound pairing signals transmitted in a meeting room are adjusted automatically based on the ultrasound signal levels received at one or more of the sound receiving devices that can communicate with a teleconferencing endpoint in the meeting room.
Abstract translation: 这里提出的是用于控制在电话会议环境中产生的超声配对信号的水平的技术。 基于在一个或多个能够与会议室中的电话会议端点进行通信的声音接收装置中接收到的超声信号电平，自动调整在会议室中发送的超声配对信号的电平。
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