公开(公告)号：US09565369B2

公开(公告)日：2017-02-07

申请号：US14627493

申请日：2015-02-20

Applicant: Cisco Technology, Inc.

Inventor： J. William Mauchly

IPC: H04N7/14 ,  H04N5/262 ,  H04N7/15

CPC classification number: H04N5/2628 ,  H04N7/15

Abstract: Techniques are provided for dynamically adapting the view from a conference endpoint that includes a presentation apparatus, such as a whiteboard. A first signal is received that includes a video signal derived from a video camera that is viewing a room during a conference session in which a person is presenting information on a presentation apparatus. During the video conference, switching is performed between the first signal and a second signal representing content being displayed on the presentation apparatus during the conference session for output and transmission to other conference endpoints of the conference session. The determination as to whether to supply the first signal (for a normal view of the conference room) or the second signal may be based on a position determination of the presenter or may be instead be based on an external view selection command received from another conference endpoint participating in the conference session.

Abstract translation: 提供了技术来动态地适应来自包括诸如白板的呈现装置的会议端点的视图。 接收到第一信号，其包括从在呈现装置上呈现信息的会议期间正在观看房间的摄像机导出的视频信号。 在视频会议期间，在会议期间，在第一信号和第二信号之间进行表示在演示装置上显示的内容的输出和传送到会议会议的其它会议端点的切换。 关于是否提供第一信号（用于会议室的正常视图）或第二信号的确定可以基于演示者的位置确定，或者可以是基于从另一个会议接收到的外部视图选择命令 端点参加会议。

公开(公告)号：US09392226B2

公开(公告)日：2016-07-12

申请号：US14524305

申请日：2014-10-27

Applicant: Cisco Technology, Inc.

Inventor： Dihong Tian ,  J. William Mauchly ,  Joseph T. Friel

IPC: H04N7/14 ,  H04N7/15

CPC classification number: H04N7/152 ,  H04N7/147 ,  H04N7/15

Abstract: Techniques are provided for establishing a videoconference session between participants at different endpoints, where each endpoint includes at least one computing device and one or more displays. A plurality of video streams is received at an endpoint, and each video stream is classified as at least one of a people view and a data view. The classified views are analyzed to determine one or more regions of interest for each of the classified views, where at least one region of interest has a size smaller than a size of the classified view. Synthesized views of at least some of the video streams are generated, wherein the synthesized views include at least one view including a region of interest, and views including the synthesized views are rendered at one or more displays of an endpoint device.

Abstract translation: 提供了用于在不同端点的参与者之间建立视频会议会话的技术，其中每个端点包括至少一个计算设备和一个或多个显示器。 在端点处接收多个视频流，并且将每个视频流分类为人视图和数据视图中的至少一个。 分析分类视图以确定每个分类视图的一个或多个感兴趣区域，其中至少一个感兴趣区域的尺寸小于分类视图的尺寸。 生成至少一些视频流的合成视图，其中合成视图包括至少一个包括感兴趣区域的视图，并且包括合成视图的视图在端点设备的一个或多个显示处呈现。

公开(公告)号：US08854412B2

公开(公告)日：2014-10-07

申请号：US13624058

申请日：2012-09-21

Applicant: Cisco Technology, Inc.

Inventor： Dihong Tian ,  J. William Mauchly ,  Joseph T. Friel

IPC: H04N7/14

CPC classification number: H04N7/15 ,  G06T5/008 ,  G06T2207/10016 ,  G06T2207/10144 ,  G06T2207/20012 ,  G06T2207/20208

Abstract: Video frames are captured at one or more cameras during a video conference session, where each video frame includes a digital image with a plurality of pixels. Depth values associated with each pixel are determined in at least one video frame, where each depth value represents a distance of a portion of the digital image represented by at least one corresponding pixel from the one or more cameras that capture the at least one video frame. Luminance values of pixels are adjusted within captured video frames based upon the depth values determined for the pixels so as to achieve relighting of the video frames as the video frames are displayed during the video conference session.

Abstract translation: 在视频会议期间，在一个或多个摄像机处捕获视频帧，其中每个视频帧包括具有多个像素的数字图像。 在至少一个视频帧中确定与每个像素相关联的深度值，其中每个深度值表示由至少一个对应像素表示的数字图像的一部分的距离，该距离来自一个或多个拍摄至少一个视频帧的相机 。 基于为像素确定的深度值，在捕获的视频帧内调整像素的亮度值，以便在视频会议期间显示视频帧时实现视频帧的重新点亮。

公开(公告)号：US20140085398A1

公开(公告)日：2014-03-27

申请号：US13624058

申请日：2012-09-21

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Dihong Tian ,  J. William Mauchly ,  Joseph T. Friel

IPC: H04N7/14

CPC classification number: H04N7/15 ,  G06T5/008 ,  G06T2207/10016 ,  G06T2207/10144 ,  G06T2207/20012 ,  G06T2207/20208

Abstract: Video frames are captured at one or more cameras during a video conference session, where each video frame includes a digital image with a plurality of pixels. Depth values associated with each pixel are determined in at least one video frame, where each depth value represents a distance of a portion of the digital image represented by at least one corresponding pixel from the one or more cameras that capture the at least one video frame. Luminance values of pixels are adjusted within captured video frames based upon the depth values determined for the pixels so as to achieve relighting of the video frames as the video frames are displayed during the video conference session.

Abstract translation: 在视频会议期间，在一个或多个摄像机处捕获视频帧，其中每个视频帧包括具有多个像素的数字图像。 在至少一个视频帧中确定与每个像素相关联的深度值，其中每个深度值表示由至少一个对应像素表示的数字图像的一部分的距离，该距离来自一个或多个拍摄至少一个视频帧的相机 。 基于为像素确定的深度值，在捕获的视频帧内调整像素的亮度值，以便在视频会议期间显示视频帧时实现视频帧的重新点亮。

公开(公告)号：US09148625B2

公开(公告)日：2015-09-29

申请号：US13624246

申请日：2012-09-21

Applicant: Cisco Technology, Inc.

Inventor： Aaron Kleinsteiber ,  J. William Mauchly ,  Jonathan Yang

IPC: H04N7/14 ,  H04N7/15

CPC classification number: H04N7/15

Abstract: A method for transition control in a videoconference comprises receiving a plurality of video streams from a plurality of cameras, displaying a first video stream of the plurality of video streams, detecting a stream selection event for display of a second video stream of the plurality of video streams, determining a transition category for a transition from the first video stream to the second video stream, and selecting a display transition based on the transition category for displaying the transition from the first video stream to the second video stream.

Abstract translation: 一种用于视频会议中的转换控制的方法包括从多个摄像机接收多个视频流，显示多个视频流的第一视频流，检测用于显示多个视频的第二视频流的流选择事件 确定用于从第一视频流到第二视频流的转换的转换类别，以及基于用于显示从第一视频流到第二视频流的转换的转换类别来选择显示转移。

公开(公告)号：US20130136185A1

公开(公告)日：2013-05-30

申请号：US13749588

申请日：2013-01-24

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Dihong Tian ,  J. William Mauchly ,  Joseph T. Friel ,  Wen-hsiung Chen

IPC: H04N7/26

CPC classification number: H04N19/00569 ,  H04N19/23 ,  H04N19/50 ,  H04N19/537 ,  H04N19/553 ,  H04N19/573 ,  H04N19/61

Abstract: A video coder includes a forward coder and a reconstruction module determining a motion compensated predicted picture from one or more previously decoded pictures in a multi-picture store. The reconstruction module includes a reference picture predictor that uses only previously decoded pictures to determine one or more predicted reference pictures. The predicted reference picture(s) are used for motion compensated prediction. The reference picture predictor may include optical flow analysis that uses a current decoded picture and that may use one or more previously decoded pictures together with affine motion analysis and image warping to determine at least a portion of at least one of the reference pictures.

Abstract translation: 视频编码器包括前向编码器和重构模块，其从多图像存储器中的一个或多个先前解码的图像确定运动补偿预测图像。 重建模块包括参考图像预测器，其仅使用先前解码的图像来确定一个或多个预测参考图像。 预测的参考图像用于运动补偿预测。 参考图像预测器可以包括使用当前解码图像的光流分析，并且可以使用一个或多个先前解码的图像以及仿射运动分析和图像扭曲来确定至少一个参考图片的至少一部分。

公开(公告)号：US20150042748A1

公开(公告)日：2015-02-12

申请号：US14524305

申请日：2014-10-27

Applicant: Cisco Technology, Inc.

Inventor： Dihong Tian ,  J. William Mauchly ,  Joseph T. Friel

IPC: H04N7/15

CPC classification number: H04N7/152 ,  H04N7/147 ,  H04N7/15

Abstract: Techniques are provided for establishing a videoconference session between participants at different endpoints, where each endpoint includes at least one computing device and one or more displays. A plurality of video streams is received at an endpoint, and each video stream is classified as at least one of a people view and a data view. The classified views are analyzed to determine one or more regions of interest for each of the classified views, where at least one region of interest has a size smaller than a size of the classified view. Synthesized views of at least some of the video streams are generated, wherein the synthesized views include at least one view including a region of interest, and views including the synthesized views are rendered at one or more displays of an endpoint device.

Abstract translation: 提供了用于在不同端点的参与者之间建立视频会议会话的技术，其中每个端点包括至少一个计算设备和一个或多个显示器。 在端点处接收多个视频流，并且将每个视频流分类为人视图和数据视图中的至少一个。 分析分类视图以确定每个分类视图的一个或多个感兴趣区域，其中至少一个感兴趣区域的尺寸小于分类视图的尺寸。 生成至少一些视频流的合成视图，其中合成视图包括至少一个包括感兴趣区域的视图，并且包括合成视图的视图在端点设备的一个或多个显示处呈现。

公开(公告)号：US08644384B2

公开(公告)日：2014-02-04

申请号：US13749588

申请日：2013-01-24

Applicant: Cisco Technology, Inc.

Inventor： Dihong Tian ,  J. William Mauchly ,  Joseph T. Friel ,  Wen-hsiung Chen

IPC: H04N11/02

CPC classification number: H04N19/00569 ,  H04N19/23 ,  H04N19/50 ,  H04N19/537 ,  H04N19/553 ,  H04N19/573 ,  H04N19/61

Abstract: A video coder includes a forward coder and a reconstruction module determining a motion compensated predicted picture from one or more previously decoded pictures in a multi-picture store. The reconstruction module includes a reference picture predictor that uses only previously decoded pictures to determine one or more predicted reference pictures. The predicted reference picture(s) are used for motion compensated prediction. The reference picture predictor may include optical flow analysis that uses a current decoded picture and that may use one or more previously decoded pictures together with affine motion analysis and image warping to determine at least a portion of at least one of the reference pictures.

Abstract translation: 视频编码器包括前向编码器和重构模块，其从多图像存储器中的一个或多个先前解码的图像确定运动补偿预测图像。 重建模块包括参考图像预测器，其仅使用先前解码的图像来确定一个或多个预测参考图像。 预测的参考图像用于运动补偿预测。 参考图像预测器可以包括使用当前解码图像的光流分析，并且可以使用一个或多个先前解码的图像以及仿射运动分析和图像扭曲来确定至少一个参考图片的至少一部分。

公开(公告)号：US09025762B2

公开(公告)日：2015-05-05

申请号：US13657908

申请日：2012-10-23

Applicant: Cisco Technology, Inc.

Inventor： Feng Bao ,  J. William Mauchly ,  Subrahmanyam Kunapuli ,  Xiangyu Bao

IPC: H04M9/08 ,  H04R1/28

CPC classification number: H04R1/2869 ,  H04M9/082

Abstract: Clock synchronization for an acoustic echo canceller (AEC) with a speaker and a microphone connected over a digital link may be provided. A clock difference may be estimated by analyzing the speaker signal and the microphone signal in the digital domain. The clock synchronization may be combined in both hardware and software. This synchronization may be performed in two stages, first with coarse synchronization in hardware, then fine synchronization in software with, for example, a re-sampler.

Abstract translation: 可以提供具有通过数字链路连接的扬声器和麦克风的声学回声消除器（AEC）的时钟同步。 可以通过分析数字域中的扬声器信号和麦克风信号来估计时钟差。 时钟同步可以在硬件和软件两者中组合。 该同步可以分两个阶段执行，首先是硬件中的粗略同步，然后在软件中与例如重新采样器进行精细同步。

公开(公告)号：US20150172562A1

公开(公告)日：2015-06-18

申请号：US14627493

申请日：2015-02-20

Applicant: CISCO TECHNOLOGY, INC.

Inventor： J. William Mauchly

IPC: H04N5/262 ,  H04N7/15

CPC classification number: H04N5/2628 ,  H04N7/15

Abstract: Techniques are provided for dynamically adapting the view from a conference endpoint that includes a presentation apparatus, such as a whiteboard. A first signal is received that includes a video signal derived from a video camera that is viewing a room during a conference session in which a person is presenting information on a presentation apparatus. During the video conference, switching is performed between the first signal and a second signal representing content being displayed on the presentation apparatus during the conference session for output and transmission to other conference endpoints of the conference session. The determination as to whether to supply the first signal (for a normal view of the conference room) or the second signal may be based on a position determination of the presenter or may be instead be based on an external view selection command received from another conference endpoint participating in the conference session.

Abstract translation: 提供了技术来动态地适应来自包括诸如白板的呈现装置的会议端点的视图。 接收到第一信号，其包括从在呈现装置上呈现信息的会议期间正在观看房间的摄像机导出的视频信号。 在视频会议期间，在会议期间，在第一信号和第二信号之间进行表示在演示装置上显示的内容的输出和传送到会议会议的其它会议端点的切换。 关于是否提供第一信号（用于会议室的正常视图）或第二信号的确定可以基于演示者的位置确定，或者可以是基于从另一个会议接收到的外部视图选择命令 端点参加会议。