公开(公告)号：US09025764B2

公开(公告)日：2015-05-05

申请号：US14100907

申请日：2013-12-09

Applicant: Polycom, Inc.

Inventor： Peter L. Chu ,  Wayne Dunlap

IPC: H04M9/08 ,  H04M3/00 ,  H04M1/60

CPC classification number: H04M3/002 ,  H04M1/6033 ,  H04M3/2236 ,  H04M3/568 ,  H04M9/085

Abstract: Audio from a near-end that has been acoustically coupled at the far-end and returned to the near-end unit is detected and suppressed at the near-end of a conference. First and second energy outputs for separate bands are determined for the near-end audio being sent from the near-end unit and for the far-end audio being received at the near-end unit. The near-end unit compares the first and second energy outputs to one another for each of the bands over a time delay range and detects the return of the sent near-end audio in the received far-end audio based on the comparison. The comparison can use a cross-correlation to find an estimated time delay used for further analysis of the near and far-end energies. The near-end unit suppresses any detected return by muting or reducing what far-end audio is output at its loudspeaker.

Abstract translation: 来自远端的声耦合并返回到近端单元的近端的音频在会议的近端被检测和抑制。 确定用于单独频带的第一和第二能量输出用于从近端单元发送的近端音频以及在近端单元处接收的远端音频。 近端单元在时间延迟范围内针对每个频带将第一和第二能量输出彼此进行比较，并且基于该比较来检测所接收的远端音频中所发送的近端音频的返回。 比较可以使用互相关来找到用于进一步分析近端和远端能量的估计时间延迟。 近端单元通过静音抑制任何检测到的返回，或者减少在其扬声器处输出远端音频。

公开(公告)号：US20140072143A1

公开(公告)日：2014-03-13

申请号：US13865008

申请日：2013-04-17

Applicant: Polycom, Inc.

Inventor： Yibo Liu ,  Peter L. Chu ,  Jeff Rodman

IPC: G06F3/16

CPC classification number: G06F3/165 ,  H03G3/345

Abstract: Methods and systems for cancelation of table noise in a speaker system used for video or audio conferencing are disclosed. Table noise is cancelled in one embodiment by providing a signal or a message whenever a key is depressed on a keyboard or a mouse is clicked. When the key depression signal or message is received, the system evaluates whether speech is occurring. If speech is not occurring, then the microphone in the system is muted. However, if speech is occurring, the microphone is not muted for a period of time to allow the speech to be transmitted to the far end. This allows the conference to be continued in the presence of keyboard sounds if speech is occurring at the same time but also silences the keyboard sounds if speech is not occurring.

Abstract translation: 公开了用于视频或音频会议的扬声器系统中用于消除表噪声的方法和系统。 在一个实施例中，通过在键盘上按下键或点击鼠标时提供信号或消息来消除表噪声。 当接收到按键抑制信号或消息时，系统评估是否发生语音。 如果没有发生语音，则系统中的麦克风静音。 然而，如果发生语音，则麦克风不会被静音一段时间，以允许语音被发送到远端。 这样就可以在出现语音的同时存在键盘声音的情况下继续进行会议，但是如果没有发生语音，则会使键盘声音静音。

公开(公告)号：US20210136490A1

公开(公告)日：2021-05-06

申请号：US17085581

申请日：2020-10-30

Applicant: Polycom, Inc.

Inventor： Kwan K. Truong ,  Peter L. Chu ,  Steven L. Potts ,  Eric Elias

IPC: H04R3/00 ,  G10L21/0208 ,  G10L21/0216 ,  H04R3/04 ,  H04R5/027 ,  H04R5/04

Abstract: The amount of far-field noise transmitted by a primary communication device in an open-plan office environment is reduced by defining an acoustic perimeter of reference microphones around the primary device. Reference microphones generate a reference audio input including far-field noise in the proximity of the primary device. The primary device generates a main audio input including the voice of the primary speaker as well as background noise. Reference audio input is compared to main audio input to identify the background noise portion of the main audio signal. A noise reduction algorithm suppresses the identified background noise in the main audio signal. The one or more reference microphones defining the acoustic perimeter may be included in separate microphone devices placed in proximity to the main desktop phone, microphones within other nearby desktop telephone devices, or a combination of both types of devices.

公开(公告)号：US10750282B2

公开(公告)日：2020-08-18

申请号：US16723517

申请日：2019-12-20

Applicant: Polycom, Inc.

Inventor： Kwan K. Truong ,  Peter L. Chu ,  Steven L. Potts ,  Eric Elias

IPC: H04R3/00 ,  G10L21/0208 ,  G10L21/0216 ,  H04R3/04 ,  H04R5/027 ,  H04R5/04 ,  H04R27/00

Abstract: The amount of far-field noise transmitted by a primary communication device in an open-plan office environment is reduced by defining an acoustic perimeter of reference microphones around the primary device. Reference microphones generate a reference audio input including far-field noise in the proximity of the primary device. The primary device generates a main audio input including the voice of the primary speaker as well as background noise. Reference audio input is compared to main audio input to identify the background noise portion of the main audio signal. A noise reduction algorithm suppresses the identified background noise in the main audio signal. The one or more reference microphones defining the acoustic perimeter may be included in separate microphone devices placed in proximity to the main desktop phone, microphones within other nearby desktop telephone devices, or a combination of both types of devices.

公开(公告)号：US10567875B2

公开(公告)日：2020-02-18

申请号：US16376890

申请日：2019-04-05

Applicant: Polycom, Inc.

Inventor： Kwan K. Truong ,  Peter L. Chu ,  Steven L. Potts ,  Eric Elias

IPC: H04R3/04 ,  H04R3/00 ,  H04R5/04 ,  G10L21/0216 ,  H04R5/027

Abstract: The amount of far-field noise transmitted by a primary communication device in an open-plan office environment is reduced by defining an acoustic perimeter of reference microphones around the primary device. Reference microphones generate a reference audio input including far-field noise in the proximity of the primary device. The primary device generates a main audio input including the voice of the primary speaker as well as background noise. Reference audio input is compared to main audio input to identify the background noise portion of the main audio signal. A noise reduction algorithm suppresses the identified background noise in the main audio signal. The one or more reference microphones defining the acoustic perimeter may be included in separate microphone devices placed in proximity to the main desktop phone, microphones within other nearby desktop telephone devices, or a combination of both types of devices.

公开(公告)号：US20200029154A1

公开(公告)日：2020-01-23

申请号：US16376890

申请日：2019-04-05

Applicant: Polycom, Inc.

Inventor： Kwan K. Truong ,  Peter L. Chu ,  Steven L. Potts ,  Eric Elias

IPC: H04R3/04 ,  H04R3/00 ,  H04R5/04 ,  H04R5/027 ,  G10L21/0216

Abstract: The amount of far-field noise transmitted by a primary communication device in an open-plan office environment is reduced by defining an acoustic perimeter of reference microphones around the primary device. Reference microphones generate a reference audio input including far-field noise in the proximity of the primary device. The primary device generates a main audio input including the voice of the primary speaker as well as background noise. Reference audio input is compared to main audio input to identify the background noise portion of the main audio signal. A noise reduction algorithm suppresses the identified background noise in the main audio signal. The one or more reference microphones defining the acoustic perimeter may be included in separate microphone devices placed in proximity to the main desktop phone, microphones within other nearby desktop telephone devices, or a combination of both types of devices.

公开(公告)号：US10462424B2

公开(公告)日：2019-10-29

申请号：US16105894

申请日：2018-08-20

Applicant: Polycom, Inc.

Inventor： Peter L. Chu ,  Yibo Liu

IPC: H04N7/14 ,  H04N7/15 ,  H04M3/56 ,  G06F3/16

Abstract: A videoconferencing system has a videoconferencing unit that use portable devices as peripherals for the system. The portable devices obtain near-end audio and send the audio to the videoconferencing unit via a wireless connection. In turn, the videoconferencing unit sends the near-end audio from the loudest portable device along with near-end video to the far-end. The portable devices can control the videoconferencing unit and can initially establish the videoconference by connecting with the far-end and then transferring operations to the videoconferencing unit. To deal with acoustic coupling between the unit's loudspeaker and the portable device's microphone, the unit uses an echo canceller that is compensated for differences in the clocks used in the A/D and D/A converters of the loudspeaker and microphone.

公开(公告)号：US10447970B1

公开(公告)日：2019-10-15

申请号：US16200099

申请日：2018-11-26

Applicant: Polycom, Inc.

Inventor： Peter L. Chu

IPC: H04N7/14 ,  H04N7/15 ,  H04R5/027 ,  H04R1/32 ,  H04R5/04

Abstract: A system for matching audio-to-video spatial presence in a teleconference, which includes capturing video stream with a camera of a teleconferencing unit at a local endpoint. The teleconferencing unit has a first end and a second end, and a camera located midway between. The system determines a visual stage based on the video stream, and captures audio using microphones on both sides of the camera. The system determines a sound stage based on the audio captured by the microphones, and matches the sound stage to the visual stage, based on the direction of a sound source relative the parameters of the visual stage. The visual stage and matching sound stage can by output for rendering by one or more devices at a second endpoint.

公开(公告)号：US20150208035A1

公开(公告)日：2015-07-23

申请号：US14673491

申请日：2015-03-30

Applicant: Polycom, Inc.

Inventor： Peter L. Chu ,  Yibo Liu

IPC: H04N7/15 ,  H04N7/14

CPC classification number: H04N7/15 ,  G06F3/165 ,  H04M3/568 ,  H04N7/142

Abstract: A videoconferencing system has a videoconferencing unit that use portable devices as peripherals for the system. The portable devices obtain near-end audio and send the audio to the videoconferencing unit via a wireless connection. In turn, the videoconferencing unit sends the near-end audio from the loudest portable device along with near-end video to the far-end. The portable devices can control the videoconferencing unit and can initially establish the videoconference by connecting with the far-end and then transferring operations to the videoconferencing unit. To deal with acoustic coupling between the unit's loudspeaker and the portable device's microphone, the unit uses an echo canceller that is compensated for differences in the clocks used in the A/D and D/A converters of the loudspeaker and microphone.

Abstract translation: 视频会议系统具有视频会议单元，其使用便携式设备作为系统的外围设备。 便携式设备获得近端音频，并通过无线连接将音频发送到视频会议单元。 反过来，视频会议单元将最接近便携式设备的近端音频和近端视频一起发送到远端。 便携式设备可以控制视频会议单元，并且可以通过与远端连接然后将操作传送到视频会议单元来最初建立视频会议。 为了处理单元的扬声器和便携式设备的麦克风之间的声耦合，该单元使用回波消除器，其补偿扬声器和麦克风的A / D和D / A转换器中使用的时钟的差异。

公开(公告)号：US11153531B2

公开(公告)日：2021-10-19

申请号：US16931169

申请日：2020-07-16

Applicant: Polycom, Inc.

Inventor： Peter L. Chu ,  Yibo Liu

IPC: H04N7/14 ,  H04N7/15 ,  H04M3/56 ,  G06F3/16

Abstract: A videoconferencing system has a videoconferencing unit that use portable devices as peripherals for the system. The portable devices obtain near-end audio and send the audio to the videoconferencing unit via a wireless connection. In turn, the videoconferencing unit sends the near-end audio from the loudest portable device along with near-end video to the far-end. The portable devices can control the videoconferencing unit and can initially establish the videoconference by connecting with the far-end and then transferring operations to the videoconferencing unit. To deal with acoustic coupling between the unit's loudspeaker and the portable device's microphone, the unit uses an echo canceller that is compensated for differences in the clocks used in the A/D and D/A converters of the loudspeaker and microphone.