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21. 发明授权

US08713105B2 Method and apparatus for transcoding and transrating in distributed video systems 有权
标题翻译：在分布式视频系统中转码和转换的方法和装置
公开(公告)号：US08713105B2
公开(公告)日：2014-04-29
申请号：US11324864
申请日：2006-01-03
申请人： Thiyagesan Ramalingam , Francis Paul Viggiano , Nermin Ismail , Walter Friedrich , Duanpei Wu , Shantanu Sarkar
发明人： Thiyagesan Ramalingam , Francis Paul Viggiano , Nermin Ismail , Walter Friedrich , Duanpei Wu , Shantanu Sarkar
IPC分类号： G06F15/16 , H04N7/26 , H04N7/15
CPC分类号： H04L29/06455 , H04L12/1822 , H04L12/1827 , H04N7/15 , H04N19/12 , H04N19/40
摘要： Disclosed are video conferencing systems, devices, architectures, and methods for transcoding, transrating, and the like, to facilitate video streaming in a distributed arrangement. An exemplary translator in accordance with embodiments can include: an input configured to receive a first video stream in a first format, the first video stream being from a first media switch, the first media switch being associated with a first stream group having one or more first endpoints; and an output configured to provide a second video stream in a second format, the second video stream being sent to a second media switch, the second media switch being associated with a second stream group having one or more second endpoints, whereby the translator is configured to convert from the first to the second format. Further, the translator can be configured as a logical endpoint where a first interface having an input/output pair uses the first format and a second interface having another input/output pair uses the second format. The two formats may differ in at least one characteristic.
摘要翻译：公开了用于转码，转换等的视频会议系统，设备，架构和方法，以便于分布式布置中的视频流传输。根据实施例的示例性翻译器可以包括：被配置为以第一格式接收第一视频流的输入，所述第一视频流来自第一媒体交换机，所述第一媒体交换机与具有一个或多个第一个端点; 以及被配置为以第二格式提供第二视频流的输出，所述第二视频流被发送到第二媒体交换机，所述第二媒体交换机与具有一个或多个第二端点的第二流组相关联，由此所述翻译器被配置从第一种格式转换成第二种格式。此外，翻译器可以被配置为逻辑端点，其中具有输入/输出对的第一接口使用第一格式，并且具有另一输入/输出对的第二接口使用第二格式。这两种格式在至少一个特征上可能不同。

22. 发明授权

US08659636B2 System and method for performing distributed video conferencing 有权
标题翻译：用于执行分布式视频会议的系统和方法
公开(公告)号：US08659636B2
公开(公告)日：2014-02-25
申请号：US10680918
申请日：2003-10-08
申请人： Scott S. Firestone , Walter R. Friedrich , Nermin M. Ismail , Keith A. Lantz , Shantanu Sarkar , Luke K. Surazski , Duanpei Wu
发明人： Scott S. Firestone , Walter R. Friedrich , Nermin M. Ismail , Keith A. Lantz , Shantanu Sarkar , Luke K. Surazski , Duanpei Wu
IPC分类号： H04N7/14
CPC分类号： H04N7/14 , H04L12/1822 , H04L65/4046 , H04L65/605 , H04M3/567 , H04M2207/20 , H04N7/15
摘要： A method for executing a video conference is provided that includes receiving one or more audio streams associated with a video conference from one or more end points and determining an active speaker associated with one of the end points. Audio information associated with the active speaker may be received at one or more media switches. One or more video streams may be suppressed except for a selected video stream associated with the active speaker, the selected video stream propagating to one or more of the media switches during the video conference. The selected video stream may be replicated such that it may be communicated to one or more of the end points associated with a selected one of the media switches.
摘要翻译：提供一种用于执行视频会议的方法，其包括从一个或多个端点接收与视频会议相关联的一个或多个音频流，并且确定与所述终点中的一个相关联的活动扬声器。可以在一个或多个媒体交换机处接收与主动扬声器相关联的音频信息。除了与活动扬声器相关联的所选视频流之外，可以抑制一个或多个视频流，所选择的视频流在视频会议期间传播到一个或多个媒体交换机。可以复制所选择的视频流，使得其可以被传送到与所选择的一个媒体交换机相关联的一个或多个终点。

23. 发明申请

US20130106984A1 TECHNIQUES FOR PERFORMING KEY FRAME REQUESTS IN MEDIA SERVERS AND ENDPOINT DEVICES 有权
标题翻译：在媒体服务器和端点设备中执行关键帧请求的技术
公开(公告)号：US20130106984A1
公开(公告)日：2013-05-02
申请号：US13287155
申请日：2011-11-02
申请人： Duanpei Wu , Kavitha Velusamy
发明人： Duanpei Wu , Kavitha Velusamy
IPC分类号： H04N7/15
CPC分类号： H04N7/15
摘要： Techniques are provided for sending and receiving key frames and key frame request messages. At a video conference bridge, a key frame request message is received from a first endpoint device. The key frame request message comprises a request for a key frame from a second endpoint device. When a prior key frame request message is received before the key frame request message, a key frame request time value is determined that corresponds to an amount of time between receiving the key frame request message and receiving the prior key frame request message. This value is compared to a threshold time value. When the key frame request time is greater than the threshold time, a key frame request forwarding message is generated, and the key frame request forwarding message is sent to the second endpoint device to request the key frame from the second endpoint device.
摘要翻译：提供了发送和接收关键帧和关键帧请求消息的技术。在视频会议桥上，从第一端点设备接收关键帧请求消息。关键帧请求消息包括对来自第二端点设备的关键帧的请求。当在关键帧请求消息之前接收到先前的关键帧请求消息时，确定对应于接收到关键帧请求消息和接收先前关键帧请求消息之间的时间量的关键帧请求时间值。该值与阈值时间值进行比较。当关键帧请求时间大于阈值时间时，生成关键帧请求转发消息，并将关键帧请求转发消息发送到第二终端设备，从第二终端设备请求关键帧。

24. 发明授权

US08340078B1 System for concealing missing audio waveforms 有权
标题翻译：隐藏丢失音频波形的系统
公开(公告)号：US08340078B1
公开(公告)日：2012-12-25
申请号：US11644062
申请日：2006-12-21
申请人： Duanpei Wu , Luke K. Surazski
发明人： Duanpei Wu , Luke K. Surazski
IPC分类号： H04L12/66 , G10L11/04 , G10L11/06
CPC分类号： G10L25/90 , G10L19/005 , G10L21/047
摘要： In one embodiment, a method can include: (i) establishing an internet protocol (IP) connection; (ii) forming a buffered version of a plurality of voice frame slices from received audio packets; and (iii) when an erasure is detected, performing a packet loss concealment (PLC) to provide a synthesized speech signal for the erasure, where the PLC can include: (a) identifying first and second pitches from the buffered version of the plurality of voice frame slices; and (b) forming the synthesized speech signal by using the first and second pitches, and more if needed, followed by an overlay-add (OLA).
摘要翻译：在一个实施例中，一种方法可以包括：（i）建立因特网协议（IP）连接; （ii）从接收到的音频分组形成多个语音帧片段的缓冲版本; 和（iii）当检测到擦除时，执行分组丢失隐藏（PLC）以提供用于擦除的合成语音信号，其中PLC可以包括：（a）从缓冲版本中识别第一和第二间距语音片段; 和（b）通过使用第一和第二音调形成合成的语音信号，如果需要，则更多，然后是叠加（OLA）。

25. 发明申请

US20080068449A1 METHOD AND APPARATUS FOR USING FAR END CAMERA CONTROL (FECC) MESSAGES TO IMPLEMENT PARTICIPANT AND LAYOUT SELECTION IN A MULTIPOINT VIDEOCONFERENCE 有权
标题翻译：使用终端相机控制（FECC）消息在多点视频中实现参与者和布局选择的方法和装置
公开(公告)号：US20080068449A1
公开(公告)日：2008-03-20
申请号：US11948031
申请日：2007-11-30
申请人： Duanpei Wu , Nermin Ismail , Shantanu Sarkar , Walter Friedrich
发明人： Duanpei Wu , Nermin Ismail , Shantanu Sarkar , Walter Friedrich
IPC分类号： H04N7/14
CPC分类号： H04N7/152
摘要： A method, an apparatus and a medium encoded with instructions for providing layout selection, participant selection, and/or participant-to-participant far end camera control of the selected participant for use in a continuous presence multipoint videoconference. The method includes receiving one or more far end camera control messages over a packet network from a first participant of a multipoint videoconference; maintaining an indication of a far end camera control mode for the first participant, the mode being one of a set of modes; and depending on the far end camera control mode and on controls possible, carrying out a control according to one ore more the camera control messages.
摘要翻译：一种编码有指令的方法，装置和介质，所述指令用于提供所选参与者的布局选择，参与者选择和/或参与者至参与者远端相机控制，以用于连续存在多点视频会议。该方法包括从多点视频会议的第一参与者通过分组网络接收一个或多个远端相机控制消息; 保持第一参与者的远端相机控制模式的指示，该模式是一组模式之一; 并且根据远端摄像机控制模式和可控的控制方式，根据摄像机控制消息一次进行控制。

26. 发明申请

US20070280194A1 Marking Keyframes For A Communication Session 有权
标题翻译：标记通信会话的关键帧
公开(公告)号：US20070280194A1
公开(公告)日：2007-12-06
申请号：US11421622
申请日：2006-06-01
申请人： Duanpei Wu , Walter R. Friedrich , Shantanu Sarkar , Steven G. Fry
发明人： Duanpei Wu , Walter R. Friedrich , Shantanu Sarkar , Steven G. Fry
IPC分类号： H04L12/28
CPC分类号： H04L12/66
摘要： Marking a keyframe of a media stream in a communication system involves one or more entry media switches in communication with one or more endpoints. An entry media switch receives a media stream from an endpoint, where the media stream comprises a sequence of packets with a keyframe. The keyframe is detected and marked with a keyframe indicator. The keyframe indicator is operable to notify a downstream device of the keyframe. An output media stream is outputted.
摘要翻译：在通信系统中标记媒体流的关键帧涉及与一个或多个端点通信的一个或多个入口媒体交换机。入口介质交换机从端点接收媒体流，其中媒体流包括具有关键帧的分组序列。检测到关键帧并用关键帧指示器标记。关键帧指示器可操作以向下游设备通知关键帧。输出输出媒体流。

27. 发明申请

US20050078170A1 System and method for performing distributed video conferencing 有权
公开(公告)号：US20050078170A1
公开(公告)日：2005-04-14
申请号：US10680918
申请日：2003-10-08
申请人： Scott Firestone , Walter Friedrich , Nermin Ismail , Keith Lantz , Shantanu Sarkar , Luke Surazski , Duanpei Wu
发明人： Scott Firestone , Walter Friedrich , Nermin Ismail , Keith Lantz , Shantanu Sarkar , Luke Surazski , Duanpei Wu
IPC分类号： H04N7/15 , H04N7/14
CPC分类号： H04N7/14 , H04L12/1822 , H04L65/4046 , H04L65/605 , H04M3/567 , H04M2207/20 , H04N7/15
摘要： A method for executing a video conference is provided that includes receiving one or more audio streams associated with a video conference from one or more end points and determining an active speaker associated with one of the end points. Audio information associated with the active speaker may be received at one or more media switches. One or more video streams may be suppressed except for a selected video stream associated with the active speaker, the selected video stream propagating to one or more of the media switches during the video conference. The selected video stream may be replicated such that it may be communicated to one or more of the end points associated with a selected one of the media switches.

28. 发明授权

US08760490B2 Techniques for a rate-adaptive video conference bridge 有权
标题翻译：速率自适应视频会议桥的技术
公开(公告)号：US08760490B2
公开(公告)日：2014-06-24
申请号：US13307521
申请日：2011-11-30
申请人： Duanpei Wu , Jing Li , Shih-cheng Stan Yang , Herbert M. Wildfeuer , Anand Oswal
发明人： Duanpei Wu , Jing Li , Shih-cheng Stan Yang , Herbert M. Wildfeuer , Anand Oswal
IPC分类号： H04N7/15
CPC分类号： H04N7/15 , H04N21/23439 , H04N21/23655
摘要： A rate adaptive video conference bridge and related techniques are provided. At a video conference bridge, a source video stream is received from a source endpoint device in a network. The source video stream is encoded using a first encoder unit and second encoder unit to generate respective first and second encoded video streams. A determination is made whether to decrease or increase a bit rate of the source video stream based on network condition information. If the bit rate is to be decreased, the first encoder unit is instructed to send the first encoded video stream to a destination endpoint device. If the bit rate is to be increased, the second encoder unit is instructed to send the second encoded video stream to the destination endpoint device.
摘要翻译：提供了速率自适应视频会议桥和相关技术。在视频会议桥上，从网络中的源端点设备接收源视频流。使用第一编码器单元和第二编码器单元对源视频流进行编码，以生成相应的第一和第二编码视频流。根据网络条件信息确定是否减少或增加源视频流的比特率。如果要降低比特率，则指示第一编码器单元将第一编码视频流发送到目的地端点设备。如果要提高比特率，则指示第二编码器单元将第二编码视频流发送到目的地端点设备。

29. 发明授权

US08619118B2 System and method for video conferencing 有权
标题翻译：视频会议的系统和方法
公开(公告)号：US08619118B2
公开(公告)日：2013-12-31
申请号：US13471288
申请日：2012-05-14
申请人： Duanpei Wu , Shantanu Sarkar , Nermin M. Ismail
发明人： Duanpei Wu , Shantanu Sarkar , Nermin M. Ismail
IPC分类号： H04N7/14
CPC分类号： H04N7/14 , H04N7/15
摘要： In one embodiment, an apparatus includes a first module that causes the first endpoint to receive a current speaker's video stream if the first endpoint is not the current speaker and to receive a last speaker's video stream if the first endpoint is the current speaker. The apparatus includes a second module that causes the second endpoint to receive a continuous presence, current speaker video stream if the second endpoint is not the current speaker and to receive a continuous presence, last speaker video stream if the second endpoint is the current speaker. The continuous presence, current speaker video stream comprises two or more video streams, one of which includes at least a portion of the current speaker's video stream. The continuous presence, last speaker video stream comprises two or more video streams, one of which includes at least a portion of a last speaker's video stream.
摘要翻译：在一个实施例中，一种装置包括第一模块，如果第一端点不是当前的扬声器，则使第一端点接收当前扬声器的视频流，并且如果第一端点是当前的扬声器则接收最后的说话者的视频流。如果第二端点是当前的说话者，该装置包括使第二端点接收连续存在的第二模块，如果第二端点不是当前的扬声器并且接收连续存在，则最后的扬声器视频流。连续存在的当前扬声器视频流包括两个或更多个视频流，其中之一包括当前说话者的视频流的至少一部分。连续存在的最后扬声器视频流包括两个或更多个视频流，其中之一包括最后一个扬声器的视频流的至少一部分。

30. 发明授权

US08576272B2 Method and apparatus for using far end camera control (FECC) messages to implement participant and layout selection in a multipoint videoconference 有权
标题翻译：在多点视频会议中使用远端相机控制（FECC）消息来实现参与者和布局选择的方法和装置
公开(公告)号：US08576272B2
公开(公告)日：2013-11-05
申请号：US13102332
申请日：2011-05-06
申请人： Duanpei Wu , Nermin M. Ismail , Shantanu Sarkar , Walter R. Friedrich
发明人： Duanpei Wu , Nermin M. Ismail , Shantanu Sarkar , Walter R. Friedrich
IPC分类号： H04N7/14
CPC分类号： H04N7/152
摘要： A method, an apparatus and a medium encoded with instructions for providing layout selection, participant selection, and/or participant-to-participant far end camera control of the selected participant for use in a continuous presence multipoint videoconference. The method includes receiving one or more far end camera control messages over a packet network from a first participant of a multipoint videoconference; maintaining an indication of a far end camera control mode for the first participant, the mode being one of a set of modes; and depending on the far end camera control mode and on controls possible, carrying out a control according to one ore more the camera control messages.
摘要翻译：一种编码有指令的方法，装置和介质，所述指令用于提供所选参与者的布局选择，参与者选择和/或参与者至参与者远端相机控制，以用于连续存在多点视频会议。该方法包括从多点视频会议的第一参与者通过分组网络接收一个或多个远端相机控制消息; 保持第一参与者的远端相机控制模式的指示，该模式是一组模式之一; 并且根据远端摄像机控制模式和可控的控制方式，根据摄像机控制消息一次进行控制。

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