公开(公告)号：US09392221B2

公开(公告)日：2016-07-12

申请号：US13786260

申请日：2013-03-05

Applicant: Polycom, Inc.

Inventor： Jinwei Feng ,  Peter Chu ,  Wayne Dunlap ,  Jonathan Gallmeier

IPC: H04N7/15 ,  H04N7/14

CPC classification number: H04N7/15 ,  H04N7/142 ,  H04N7/147

Abstract: A videoconferencing apparatus automatically tracks speakers in a room and dynamically switches between a controlled, people-view camera and a fixed, room-view camera. When no one is speaking, the apparatus shows the room view to the far-end. When there is a dominant speaker in the room, the apparatus directs the people-view camera at the dominant speaker and switches from the room-view camera to the people-view camera. When there is a new speaker in the room, the apparatus switches to the room-view camera first, directs the people-view camera at the new speaker, and then switches to the people-view camera directed at the new speaker. When there are two near-end speakers engaged in a conversation, the apparatus tracks and zooms-in the people-view camera so that both speakers are in view.

公开(公告)号：US20140098950A1

公开(公告)日：2014-04-10

申请号：US14100907

申请日：2013-12-09

Applicant: Polycom, Inc.

Inventor： Peter L. Chu ,  Wayne Dunlap

IPC: H04M3/00

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：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：US20130271559A1

公开(公告)日：2013-10-17

申请号：US13786260

申请日：2013-03-05

Applicant: Polycom, Inc.

Inventor： Jinwei Feng ,  Peter Chu ,  Wayne Dunlap ,  Jonathan Gallmeier

IPC: H04N7/15

CPC classification number: H04N7/15 ,  H04N7/142 ,  H04N7/147

Abstract: A videoconferencing apparatus automatically tracks speakers in a room and dynamically switches between a controlled, people-view camera and a fixed, room-view camera. When no one is speaking, the apparatus shows the room view to the far-end. When there is a dominant speaker in the room, the apparatus directs the people-view camera at the dominant speaker and switches from the room-view camera to the people-view camera. When there is a new speaker in the room, the apparatus switches to the room-view camera first, directs the people-view camera at the new speaker, and then switches to the people-view camera directed at the new speaker. When there are two near-end speakers engaged in a conversation, the apparatus tracks and zooms-in the people-view camera so that both speakers are in view.

Abstract translation: 视频会议设备自动跟踪房间中的扬声器，并在受控的人民摄像机和固定的室内摄像机之间动态切换。 当没有人在说话的时候，设备会显示到远端的房间视图。 当房间中有主导扬声器时，设备将人物摄像机引导到主扬声器，并从室内摄像机切换到人民摄像机。 当房间里有一个新的扬声器时，设备首先切换到室内摄像机，将人物摄像机引导到新的扬声器，然后切换到指向新扬声器的人物摄像机。 当有两个近端扬声器进行通话时，该设备将跟踪和放大人民摄像机，以便两个扬声器都在视野中。