公开(公告)号：US10446170B1

公开(公告)日：2019-10-15

申请号：US16012565

申请日：2018-06-19

Applicant: Cisco Technology, Inc.

Inventor： Eric Chen ,  Asbjørn Therkelsen ,  Espen Moberg ,  Wei-Lien Hsu

IPC: G10L21/0216 ,  G10L25/30 ,  G06F17/18 ,  G06N7/00 ,  G06N20/00

Abstract: This disclosure relates to solutions for eliminating undesired audio artifacts, such as background noises, on an audio channel. A process for implementing the technology can include receiving a set of audio segments, analyzing the segments using a first ML model to identify a first probability of unwanted background noises in the segments, and if the first probability exceeds a threshold, analyzing the segments using a second ML model to determine a second probability that the one or more background features exist in the segments. In some aspects, the process can include attenuating audio artifacts in the segments, if the second probability exceeds a second threshold. In some implementations, dynamic time stretching and shrinking can be applied to the noise attenuation. Systems and machine-readable media are also provided.

公开(公告)号：US10757240B1

公开(公告)日：2020-08-25

申请号：US16506314

申请日：2019-07-09

Applicant: Cisco Technology, Inc.

Inventor： Knut Inge Hvidsten ,  Espen Moberg

IPC: H04M1/60 ,  H04W84/22 ,  H04W76/14 ,  G06F3/16 ,  H04W4/02 ,  H04R3/02 ,  G06F3/01

Abstract: In one example, a first headset establishes a connection with a second headset that is associated with a target participant. The first headset obtains, via the connection, a first audio signal corresponding to speech of the target participant. Based on the first audio signal, one or more parameters associated with a position or a movement of a head of a user of the first headset, one or more head-related transfer functions associated with a shape of the head of the user, and a layout of the environment of the first headset, the first headset modifies the first audio signal to produce a first modified audio signal that corresponds to the speech of the target participant that would be present at the head of the user in absence of the first headset and the noise generated in the environment.

公开(公告)号：US20200344545A1

公开(公告)日：2020-10-29

申请号：US16394328

申请日：2019-04-25

Applicant: Cisco Technology, Inc.

Inventor： Knut Inge Hvidsten ,  Espen Moberg

IPC: H04R3/00 ,  G10L21/0208 ,  G10L21/0272

Abstract: In one example, a headset may obtain, from a first microphone that is configured at a first location relative to an audio source, a first audio signal having a first audio level. The headset may further obtain, from a second microphone that is configured at a second location relative to the audio source, a second audio signal having a second audio level. The second location may be a greater distance from the audio source than the first location. The headset may determine a target audio level based on the second audio level. The headset may adjust the first audio signal to the target audio level to produce an adjusted first audio signal, and output the adjusted first audio signal.

公开(公告)号：US09226062B2

公开(公告)日：2015-12-29

申请号：US14218217

申请日：2014-03-18

Applicant: Cisco Technology, Inc.

Inventor： Haohai Sun ,  Espen Moberg ,  Bjørn Winsvold

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

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：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：US20200043509A1

公开(公告)日：2020-02-06

申请号：US16598059

申请日：2019-10-10

Applicant: Cisco Technology, Inc.

Inventor： Eric Chen ,  Asbjørn Therkelsen ,  Espen Moberg ,  Wei-Lien Hsu

IPC: G10L21/0216 ,  G10L25/30 ,  G06F17/18 ,  G06N7/00 ,  G06N20/00

Abstract: This disclosure relates to solutions for eliminating undesired audio artifacts, such as background noises, on an audio channel. A process for implementing the technology can include receiving a set of audio segments, analyzing the segments using a first ML model to identify a first probability of unwanted background noises in the segments, and if the first probability exceeds a threshold, analyzing the segments using a second ML model to determine a second probability that the one or more background features exist in the segments. In some aspects, the process can include attenuating audio artifacts in the segments, if the second probability exceeds a second threshold. In some implementations, dynamic time stretching and shrinking can be applied to the noise attenuation. Systems and machine-readable media are also provided.

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

IPC: H04R3/00 ,  H04R1/32 ,  H04R1/40

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.

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

IPC: H04R3/00 ,  H04R1/40

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：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

IPC: H04R3/00 ,  H04R1/32 ,  H04R1/40

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。