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    Adaptive noise cancellation for multiple audio endpoints in a shared space
    2.
    再颁专利
    Adaptive noise cancellation for multiple audio endpoints in a shared space 有权

    公开(公告)号：USRE49462E1

    公开(公告)日：2023-03-14

    申请号：US17325875

    申请日：2021-05-20

    Applicant: Cisco Technology, Inc.

    Inventor： Lennart Burenius ,  Oystein Birkenes

    IPC: G10L21/0232 ,  H04R3/04 ,  G10L21/0208 ,  H04R1/40 ,  H04R1/10

    Abstract: Techniques for adaptive noise cancellation for multiple audio endpoints in a shared space are described. According to one example, a method includes detecting, by a first audio endpoint, one or more audio endpoints co-located with the first audio endpoint at a first location. A selected audio endpoint of the one or more audio endpoints is identified as a target noise source. The method includes obtaining, from the selected audio endpoint, a loudspeaker reference signal associated with a loudspeaker of the selected audio endpoint and removing the loudspeaker reference signal from a microphone signal associated with a microphone of the first audio endpoint. The method also includes providing the microphone signal from the first audio endpoint to at least one of a voice user interface (VUI) or a second audio endpoint, wherein the second audio endpoint is located remotely from the first location.

    Adaptive noise cancellation for multiple audio endpoints in a shared space
    4.
    发明授权
    Adaptive noise cancellation for multiple audio endpoints in a shared space 有权

    公开(公告)号：US10297266B1

    公开(公告)日：2019-05-21

    申请号：US16009652

    申请日：2018-06-15

    Applicant: Cisco Technology, Inc.

    Inventor： Lennart Burenius ,  Oystein Birkenes

    IPC: G10L21/0232 ,  H04R3/04 ,  H04R1/40 ,  G10L21/0208

    Abstract: Techniques for adaptive noise cancellation for multiple audio endpoints in a shared space are described. According to one example, a method includes detecting, by a first audio endpoint, one or more audio endpoints co-located with the first audio endpoint at a first location. A selected audio endpoint of the one or more audio endpoints is identified as a target noise source. The method includes obtaining, from the selected audio endpoint, a loudspeaker reference signal associated with a loudspeaker of the selected audio endpoint and removing the loudspeaker reference signal from a microphone signal associated with a microphone of the first audio endpoint. The method also includes providing the microphone signal from the first audio endpoint to at least one of a voice user interface (VUI) or a second audio endpoint, wherein the second audio endpoint is located remotely from the first location.

    Automatically determining relative locations of collaboration endpoints within a building
    5.
    发明授权
    Automatically determining relative locations of collaboration endpoints within a building 有权
    自动确定建筑物内协作端点的相对位置

    公开(公告)号：US09451414B1

    公开(公告)日：2016-09-20

    申请号：US14861382

    申请日：2015-09-22

    Applicant: Cisco Technology, Inc.

    Inventor： Oystein Birkenes ,  Bjorn Winsvold

    IPC: H04W4/04 ,  G06Q10/10

    CPC classification number: H04W4/043 ,  G06Q10/1095 ,  H04L67/18 ,  H04W4/021 ,  H04W88/02

    Abstract: Techniques are presented herein for a server to automatically determine the locations of collaboration endpoints and user devices throughout a building, and then provide the user devices with directions to the endpoints. The server collects air pressure and GPS readings from the user devices over a period of time. The readings may be collected from user devices that are paired or unpaired with endpoints at the time of the readings. Over a period of time, the plurality of readings may be used by the server to calculate user device offsets, endpoint offsets, floor level offsets, and endpoint relative orientations within the building. The server may then, in response to a notification of an upcoming meeting, provide the user device with directions to the meeting based on the collected readings.

    Abstract translation: 这里给出了一种服务器技术来自动确定整个建筑物中的协作端点和用户设备的位置，然后向用户设备提供到端点的指导。 服务器在一段时间内从用户设备收集气压和GPS读数。 读数可以从读取时与端点配对或不配对的用户设备收集。 在一段时间内，服务器可以使用多个读数来计算建筑物内的用户设备偏移，端点偏移，楼层偏移和端点相对方向。 服务器然后可以响应于即将到来的会议的通知，基于收集的读数向用户设备提供指示会议的指示。

    AUTOMATICALLY DETERMINING RELATIVE LOCATIONS OF COLLABORATION ENDPOINTS WITHIN A BUILDING
    7.
    发明申请
    AUTOMATICALLY DETERMINING RELATIVE LOCATIONS OF COLLABORATION ENDPOINTS WITHIN A BUILDING 审中-公开

    公开(公告)号：US20170086032A1

    公开(公告)日：2017-03-23

    申请号：US15249674

    申请日：2016-08-29

    Applicant: Cisco Technology, Inc.

    Inventor： Oystein Birkenes ,  Bjorn Winsvold

    IPC: H04W4/04 ,  H04W4/02 ,  H04L29/08

    CPC classification number: H04W4/043 ,  G06Q10/1095 ,  H04L67/18 ,  H04W4/021 ,  H04W88/02

    Abstract: Techniques are presented herein for a server to automatically determine the locations of collaboration endpoints and user devices throughout a building, and then provide the user devices with directions to the endpoints. The server collects air pressure and GPS readings from the user devices over a period of time. The readings may be collected from user devices that are paired or unpaired with endpoints at the time of the readings. Over a period of time, the plurality of readings may be used by the server to calculate user device offsets, endpoint offsets, floor level offsets, and endpoint relative orientations within the building. The server may then, in response to a notification of an upcoming meeting, provide the user device with directions to the meeting based on the collected readings.

    Ultrasonic echo canceler-based technique to detect participant presence at a video conference endpoint
    10.
    发明授权
    Ultrasonic echo canceler-based technique to detect participant presence at a video conference endpoint 有权
    基于超声波回波消除器的技术来检测视频会议端点的参与者存在

    公开(公告)号：US09319633B1

    公开(公告)日：2016-04-19

    申请号：US14662691

    申请日：2015-03-19

    Applicant: Cisco Technology, Inc.

    Inventor： Oystein Birkenes ,  Lennart Burenius ,  Kristian Tangeland

    IPC: H04N7/14 ,  H04N7/15 ,  H04L29/06 ,  G10L17/22 ,  G10L25/21

    CPC classification number: H04N7/15 ,  G01S15/04 ,  G01S15/523 ,  H04L65/4038 ,  H04L65/80 ,  H04N7/142

    Abstract: A loudspeaker transmits an ultrasonic signal into a spatial region. A microphone transduces ultrasonic sound, including an echo of the transmitted ultrasonic signal, received from the spatial region into a received ultrasonic signal. A controller transforms the ultrasonic signal and the received ultrasonic signal into respective time-frequency domains that cover respective ultrasound frequency ranges. The controller computes an error signal, representative of an estimate of an echo-free received ultrasonic signal, based on the transformed ultrasonic signal and the transformed received ultrasonic signal. The controller computes power estimates of the error signal over time, and detects a change in people presence in the spatial region based on a change in the power estimates of the error signal over time.

    Abstract translation: 扬声器将超声波信号发送到空间区域。 麦克风将从空间区域接收的包括发送的超声信号的回波的超声波转换为接收的超声波信号。 控制器将超声波信号和接收到的超声波信号变换成覆盖各个超声频率范围的各个时域。 控制器基于变换的超声波信号和经变换的接收到的超声信号，计算代表无回波接收的超声波信号的估计的误差信号。 控制器随时间计算误差信号的功率估计，并且基于随时间的误差信号的功率估计值的变化来检测人员在空间区域中的存在的变化。

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