公开(公告)号：US09225937B2

公开(公告)日：2015-12-29

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。

公开(公告)号：US20150271593A1

公开(公告)日：2015-09-24

申请号：US14218217

申请日：2014-03-18

Applicant: Cisco Technology, Inc.

Inventor： Haohai Sun ,  Espen Moberg ,  Bjørn Winsvold

IPC: H04R1/40 ,  H04R3/00 ,  G10L19/008 ,  H04N7/15

CPC classification number: H04R1/406 ,  G10L19/008 ,  H04N7/15 ,  H04R3/005 ,  H04R2201/405 ,  H04R2430/21 ,  H04R2499/15

Abstract: A telepresence video conference endpoint device includes spaced-apart microphone arrays each configured to transduce sound into corresponding sound signals. A processor receives the sound signals from the arrays and determines a direction-of-arrival (DOA) of sound at each array based on the set of sound signals from that array, determines if each array is blocked or unblocked based on the DOA determined for that array, selects an array among the arrays based on whether each array is determined to be blocked or unblocked, and perform subsequent sound processing based on one or more of the sound signals from the selected array.

Abstract translation: 远程呈现视频会议端点设备包括间隔开的麦克风阵列，每个配置用于将声音转换成对应的声音信号。 处理器从阵列接收声音信号，并且基于来自该阵列的声音信号的集合确定每个阵列处的声音到达方向（DOA），基于为每个阵列确定的DOA确定每个阵列是否被阻塞或解除阻塞 该阵列基于每个阵列是否被确定为阻塞或解除阻塞来选择阵列中的阵列，并且基于来自所选阵列的一个或多个声音信号执行后续的声音处理。

公开(公告)号：US20140169576A1

公开(公告)日：2014-06-19

申请号：US13713357

申请日：2012-12-13

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Haohai Sun ,  Espen Moberg

IPC: H04R1/32

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。

公开(公告)号：US20200275199A1

公开(公告)日：2020-08-27

申请号：US15930841

申请日：2020-05-13

Applicant: Cisco Technology, Inc.

Inventor： Gisle Langen Enstad ,  Haohai Sun ,  Johan Ludvig Nielsen

IPC: H04R3/00 ,  H04R3/04 ,  H04R1/40

Abstract: A microphone array includes one or more front-facing microphones disposed on a front surface of the collaboration endpoint and a plurality of secondary microphones disposed on a second surface of the collaboration endpoint. The sound signals received at each of the one or more front-facing microphones and the plurality of secondary microphones are converted into microphone signals. When the sound signals have a frequency below a threshold frequency, an output signal is generated from microphone signals generated by the one or more front-facing microphones and the plurality of secondary microphones. When the sound signals have a frequency at or above a threshold frequency, an output signal is generated from microphone signals generated by only the one or more front-facing microphones.

公开(公告)号：US10389885B2

公开(公告)日：2019-08-20

申请号：US15421704

申请日：2017-02-01

Applicant: Cisco Technology, Inc.

Inventor： Haohai Sun ,  Johan Ludvig Nielsen

IPC: H04M9/08 ,  G10L21/0208 ,  G10L21/0216

Abstract: A loudspeaker is driven with a loudspeaker signal to generate sound, and sound is converted to one or more microphone signals with one or more microphones. The microphone signals are concurrently transformed into far-field beam signals and near-field beam signals. The far-field beam signals and the near-field beam signals are concurrently processed to produce one or more far-field output signals and one or more near-field output signals, respectively. Echo is detected and canceled in the far-field beam signals and in the near-field beam signals. When the echo is not detected above a threshold, the one or more far-field output signals are outputted. When the echo is detected above the threshold, the one or more near-field output signals are outputted. A signal based on the one or more output signals is transmitted.

公开(公告)号：US20190139554A1

公开(公告)日：2019-05-09

申请号：US15807806

申请日：2017-11-09

Applicant: Cisco Technology, Inc.

Inventor： Haohai Sun

IPC: G10L19/008 ,  H04S1/00 ,  H04S7/00

Abstract: A method and apparatus for providing binaural audio for a headset is provided. In one embodiment, a method includes encoding audio signals to provide binaural audio to a headset. The method includes receiving audio signals from a microphone array comprising a first plurality of elements and applying far-field array processing to the audio signals to generate a first plurality of channels. The channels can be beam channels and each channel is associated with a particular beam angle. The method further includes selecting a second plurality of channels from the first plurality of channels that is a subset of the first plurality of channels. The method includes encoding the audio signals from the selected second plurality of channels with information associated with the particular beam angle for each of the selected second plurality of channels. The encoded audio signals are configured to provide binaural audio to a headset.

公开(公告)号：US20180359562A1

公开(公告)日：2018-12-13

申请号：US15620169

申请日：2017-06-12

Applicant: Cisco Technology, Inc.

Inventor： Rune Skramstad ,  Haohai Sun

IPC: H04R3/00 ,  H04R1/40 ,  H04R1/30 ,  H04R3/04 ,  G10L21/0208 ,  H03G5/16

CPC classification number: H04R3/005 ,  H04R1/30 ,  H04R1/406 ,  H04R2201/401 ,  H04R2430/03

Abstract: The disclosed technology relates to a microphone array. The array comprises a plurality of microphones with each microphone having a horn portion. Each microphone of the array further comprises an instrument disposed at a distal end of the horn portion. Each instrument of the array is configured to convert sound waves into an electrical signal. The microphone array further comprises a beamforming signal processing circuit electrically coupled to each instrument and configured to create a plurality of beam signals based on respective electrical signals.

公开(公告)号：US10136217B2

公开(公告)日：2018-11-20

申请号：US15785545

申请日：2017-10-17

Applicant: Cisco Technology, Inc.

Inventor： Haohai Sun

IPC: H04B3/20 ,  H04R3/00 ,  H04R29/00

Abstract: At a microphone array, a soundfield is detected to produce a set of microphone signals each from a corresponding microphone in the microphone array. The set of microphone signals represents the soundfield. The detected soundfield is decomposed into a set of sub-soundfield signals based on the set of microphone signals. Each sub-soundfield signal is processed, such that each sub-soundfield signal is separately dereverberated using other ones of the sub-soundfield signals to remove reverberation from the sub-soundfield signal, to produce a set of processed sub-soundfield signals. The set of processed sub-sound field signals are mixed into a mixed output signal.

公开(公告)号：US10129409B2

公开(公告)日：2018-11-13

申请号：US15357015

申请日：2016-11-21

Applicant: Cisco Technology, Inc.

Inventor： Haohai Sun

IPC: H04M9/08 ,  H04B3/23 ,  H04R3/00

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.

公开(公告)号：US20180220007A1

公开(公告)日：2018-08-02

申请号：US15421704

申请日：2017-02-01

Applicant: Cisco Technology, Inc.

Inventor： Haohai Sun ,  Johan Ludvig Nielsen

IPC: H04M9/08 ,  G10L21/02

CPC classification number: H04M9/082 ,  G10L21/0208 ,  G10L2021/02082 ,  G10L2021/02166

Abstract: A loudspeaker is driven with a loudspeaker signal to generate sound, and sound is converted to one or more microphone signals with one or more microphones. The microphone signals are concurrently transformed into far-field beam signals and near-field beam signals. The far-field beam signals and the near-field beam signals are concurrently processed to produce one or more far-field output signals and one or more near-field output signals, respectively. Echo is detected and canceled in the far-field beam signals and in the near-field beam signals. When the echo is not detected above a threshold, the one or more far-field output signals are outputted. When the echo is detected above the threshold, the one or more near-field output signals are outputted. A signal based on the one or more output signals is transmitted.