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1. 发明申请

US20080056154A1 Measurement of round-trip delay over a network 有权
标题翻译：测量网络上的往返延迟
公开(公告)号：US20080056154A1
公开(公告)日：2008-03-06
申请号：US11516933
申请日：2006-09-06
申请人： Scott Firestone , Randall B. Baird , Wing Cheong Chau , Shantanu Sarkar
发明人： Scott Firestone , Randall B. Baird , Wing Cheong Chau , Shantanu Sarkar
IPC分类号： H04J1/16 , H04L12/66
CPC分类号： H04L12/66
摘要： In one embodiment, a first audio waveform is produced at a first side of a network connection and then encoded and sent by a first endpoint device to a second endpoint device at a second side of the network connection. A second audio waveform is then detected after being played out by the first endpoint device, the second audio waveform having been produced at the second side of the network connection in response to the second endpoint device playing out the first audio waveform. A round-trip delay is then calculating based on a time period measured from output of the first audio waveform to detection of the second audio waveform. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure.
摘要翻译：在一个实施例中，在网络连接的第一侧产生第一音频波形，然后由第一端点设备编码并发送到网络连接的第二侧的第二端点设备。然后在由第一端点设备播放之后检测第二音频波形，响应于第二端点设备播放第一音频波形，已经在网络连接的第二侧产生了第二音频波形。然后基于从第一音频波形的输出测量到第二音频波形的检测的时间周期来计算往返延迟。要强调的是，该摘要被提供以符合要求抽象的规则，允许搜索者或其他读者快速确定技术公开内容的主题。

2. 发明授权

US07916653B2 Measurement of round-trip delay over a network 有权
标题翻译：测量网络上的往返延迟
公开(公告)号：US07916653B2
公开(公告)日：2011-03-29
申请号：US11516933
申请日：2006-09-06
申请人： Scott Firestone , Randall B. Baird , Wing Cheong Chau , Shantanu Sarkar
发明人： Scott Firestone , Randall B. Baird , Wing Cheong Chau , Shantanu Sarkar
IPC分类号： G01R31/08 , H04L12/66
CPC分类号： H04L12/66
摘要： In one embodiment, a first audio waveform is produced at a first side of a network connection and then encoded and sent by a first endpoint device to a second endpoint device at a second side of the network connection. A second audio waveform is then detected after being played out by the first endpoint device, the second audio waveform having been produced at the second side of the network connection in response to the second endpoint device playing out the first audio waveform. A round-trip delay is then calculating based on a time period measured from output of the first audio waveform to detection of the second audio waveform. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure.
摘要翻译：在一个实施例中，在网络连接的第一侧产生第一音频波形，然后由第一端点设备编码并发送到网络连接的第二侧的第二端点设备。然后在由第一端点设备播放之后检测第二音频波形，响应于第二端点设备播放第一音频波形，已经在网络连接的第二侧产生了第二音频波形。然后基于从第一音频波形的输出测量到第二音频波形的检测的时间周期来计算往返延迟。要强调的是，该摘要被提供以符合要求抽象的规则，允许搜索者或其他读者快速确定技术公开内容的主题。

3. 发明申请

US20080117937A1 Lip synchronization for audio/video transmissions over a network 有权
标题翻译：通过网络进行音频/视频传输的唇形同步
公开(公告)号：US20080117937A1
公开(公告)日：2008-05-22
申请号：US11603849
申请日：2006-11-22
申请人： Scott Firestone , Madhavi Kadiyala , Randall B. Baird , Manjunath S. Bangalore , Shantanu Sarkar
发明人： Scott Firestone , Madhavi Kadiyala , Randall B. Baird , Manjunath S. Bangalore , Shantanu Sarkar
IPC分类号： H04J3/06
CPC分类号： H04N21/4347 , H04N5/04 , H04N5/4401 , H04N21/23406 , H04N21/23412 , H04N21/2365 , H04N21/4305 , H04N21/4307 , H04N21/4341 , H04N21/44004 , H04N21/44012 , H04N21/64723 , H04N21/8547
摘要： In one embodiment, a system includes a video mixer coupled with an audio mixer for exchange of information that includes a first set of delay values respecting input audio streams received by the audio mixer from a plurality of source endpoints, and output audio streams sent from the audio mixer to a plurality of destination endpoints. The information further including a second set of delay values respecting the corresponding input video streams. The audio mixer calculates end-to-end video delays, and the video mixer calculates end-to-end audio delays. The audio mixer delays the output audio streams to equalize the end-to-end audio and video delays in the event that the end-to-end audio delays are less than the end-to-end video delays, and the video mixer delays the output video streams to equalize the end-to-end audio and video delays in the event that the end-to-end video delays are less than the end-to-end audio delays.
摘要翻译：在一个实施例中，系统包括与音频混合器耦合的视频混合器，用于交换信息，所述信息包括与多个源端点相关的音频混合器接收的输入音频流的第一组延迟值，以及输出从音频混合器到多个目的地端点。所述信息还包括相对于相应的输入视频流的第二组延迟值。音频混合器计算端到端视频延迟，视频混合器可以计算端到端的音频延迟。在端到端音频延迟小于端到端视频延迟的情况下，音频混合器延迟输出音频流以均衡端到端音频和视频延迟，并且视频混频器延迟输出视频流以在终端到终端视频延迟小于端到端音频延迟的情况下均衡端对端音频和视频延迟。

4. 发明授权

US07693190B2 Lip synchronization for audio/video transmissions over a network 有权
标题翻译：通过网络进行音频/视频传输的唇形同步
公开(公告)号：US07693190B2
公开(公告)日：2010-04-06
申请号：US11603849
申请日：2006-11-22
申请人： Scott Firestone , Madhavi Kadiyala , Randall B. Baird , Manjunath S. Bangalore , Shantanu Sarkar
发明人： Scott Firestone , Madhavi Kadiyala , Randall B. Baird , Manjunath S. Bangalore , Shantanu Sarkar
IPC分类号： H04J3/06
CPC分类号： H04N21/4347 , H04N5/04 , H04N5/4401 , H04N21/23406 , H04N21/23412 , H04N21/2365 , H04N21/4305 , H04N21/4307 , H04N21/4341 , H04N21/44004 , H04N21/44012 , H04N21/64723 , H04N21/8547
摘要： In one embodiment, a system includes a video mixer coupled with an audio mixer for exchange of information that includes a first set of delay values respecting input audio streams received by the audio mixer from a plurality of source endpoints, and output audio streams sent from the audio mixer to a plurality of destination endpoints. The information further including a second set of delay values respecting the corresponding input video streams. The audio mixer calculates end-to-end video delays, and the video mixer calculates end-to-end audio delays. The audio mixer delays the output audio streams to equalize the end-to-end audio and video delays in the event that the end-to-end audio delays are less than the end-to-end video delays, and the video mixer delays the output video streams to equalize the end-to-end audio and video delays in the event that the end-to-end video delays are less than the end-to-end audio delays.
摘要翻译：在一个实施例中，系统包括与音频混合器耦合的视频混合器，用于交换信息，所述信息包括与多个源端点相关的音频混合器接收的输入音频流的第一组延迟值，以及输出从音频混合器到多个目的地端点。所述信息还包括相对于相应的输入视频流的第二组延迟值。音频混合器计算端到端视频延迟，视频混合器可以计算端到端的音频延迟。在端到端音频延迟小于端到端视频延迟的情况下，音频混合器延迟输出音频流以均衡端到端音频和视频延迟，并且视频混频器延迟输出视频流以在终端到终端视频延迟小于端到端音频延迟的情况下均衡端对端音频和视频延迟。

5. 发明授权

US08208003B2 Minimizing fast video update requests in a video conferencing system 有权
标题翻译：最小化视频会议系统中的快速视频更新请求
公开(公告)号：US08208003B2
公开(公告)日：2012-06-26
申请号：US11728130
申请日：2007-03-23
申请人： Randall B. Baird , Ryan Knotts , Thiyagesan Ramalingam , Manjunath S. Bangalore , Shantanu Sarkar
发明人： Randall B. Baird , Ryan Knotts , Thiyagesan Ramalingam , Manjunath S. Bangalore , Shantanu Sarkar
IPC分类号： H04N7/15
CPC分类号： H04N7/15
摘要： In one embodiment, a method includes dropping an initial series of video frames received by a video conferencing system from a first endpoint that has entered a video conference session as a first participant. One or more fast video update (FVU) messages received by the video conferencing system from the first endpoint during an enabling time period are then discarded. A single FVU message is then to the first endpoint after the video conferencing system has become enabled with respect to the first endpoint. An I-frame received from the first endpoint in response to the single FVU message is then sent back to the first endpoint. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure.
摘要翻译：在一个实施例中，一种方法包括从已经作为第一参与者进入视频会议会话的第一端点丢弃由视频会议系统接收的初始系列视频帧。然后，丢弃在启用时段期间由视频会议系统从第一端点接收到的一个或多个快速视频更新（FVU）消息。在视频会议系统已经相对于第一端点启用之后，单个FVU消息到达第一端点。然后，响应于单个FVU消息从第一端点接收的I帧被发送回到第一端点。要强调的是，该摘要被提供以符合要求抽象的规则，允许搜索者或其他读者快速确定技术公开内容的主题。

6. 发明申请

US20080165245A1 Integration of audio conference bridge with video multipoint control unit 有权
标题翻译：音频会议桥与视频多点控制单元的集成
公开(公告)号：US20080165245A1
公开(公告)日：2008-07-10
申请号：US11652433
申请日：2007-01-10
申请人： Shantanu Sarkar , Randall B. Baird , Stuart Asbury Taylor
发明人： Shantanu Sarkar , Randall B. Baird , Stuart Asbury Taylor
IPC分类号： H04N7/14
CPC分类号： H04N7/152 , H04L12/1827 , H04L65/4038 , H04L65/4053 , H04L65/607 , H04M3/569
摘要： In one embodiment, a system includes a video multipoint control unit (MCU) and an audio conferencing bridge, the audio conferencing bridge being operable to receive audio streams from audio-only and video endpoints, and to negotiate video sessions between each of the video endpoints and the video MCU. In response to detecting when one of the video endpoints is an active speaker, the audio conferencing bridge transmitting a dummy audio stream over a dummy audio channel from the audio conferencing bridge to the video MCU. The dummy audio stream causes the video MCU to switch an image in a video output stream. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure.
摘要翻译：在一个实施例中，系统包括视频多点控制单元（MCU）和音频会议桥，音频会议桥可操作以从仅音频和视频端点接收音频流，以及协商每个视频端点之间的视频会话和视频MCU。响应于检测到其中一个视频端点是活动扬声器，音频会议桥将虚拟音频流从音频会议桥传输到视频MCU。虚拟音频流使视频MCU切换视频输出流中的图像。要强调的是，该摘要被提供以符合要求抽象的规则，允许搜索者或其他读者快速确定技术公开内容的主题。

7. 发明申请

US20080231687A1 Minimizing fast video update requests in a video conferencing system 有权
标题翻译：最小化视频会议系统中的快速视频更新请求
公开(公告)号：US20080231687A1
公开(公告)日：2008-09-25
申请号：US11728130
申请日：2007-03-23
申请人： Randall B. Baird , Ryan Knotts , Thiyagesan Ramalingam , Manjunath S. Bangalore , Shantanu Sarkar
发明人： Randall B. Baird , Ryan Knotts , Thiyagesan Ramalingam , Manjunath S. Bangalore , Shantanu Sarkar
IPC分类号： H04N7/14
CPC分类号： H04N7/15
摘要： In one embodiment, a method includes dropping an initial series of video frames received by a video conferencing system from a first endpoint that has entered a video conference session as a first participant. One or more fast video update (FVU) messages received by the video conferencing system from the first endpoint during an enabling time period are then discarded. A single FVU message is then to the first endpoint after the video conferencing system has become enabled with respect to the first endpoint. An I-frame received from the first endpoint in response to the single FVU message is then sent back to the first endpoint. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure.
摘要翻译：在一个实施例中，一种方法包括从已经作为第一参与者进入视频会议会话的第一端点丢弃由视频会议系统接收的初始系列视频帧。然后，丢弃在启用时段期间由视频会议系统从第一端点接收到的一个或多个快速视频更新（FVU）消息。在视频会议系统已经相对于第一端点启用之后，单个FVU消息到达第一端点。然后，响应于单个FVU消息从第一端点接收的I帧被发送回到第一端点。要强调的是，该摘要被提供以符合要求抽象的规则，允许搜索者或其他读者快速确定技术公开内容的主题。

8. 发明授权

US08149261B2 Integration of audio conference bridge with video multipoint control unit 有权
标题翻译：音频会议桥与视频多点控制单元的集成
公开(公告)号：US08149261B2
公开(公告)日：2012-04-03
申请号：US11652433
申请日：2007-01-10
申请人： Shantanu Sarkar , Randall B. Baird , Stuart Asbury Taylor
发明人： Shantanu Sarkar , Randall B. Baird , Stuart Asbury Taylor
IPC分类号： H04N7/14
CPC分类号： H04N7/152 , H04L12/1827 , H04L65/4038 , H04L65/4053 , H04L65/607 , H04M3/569
摘要： In one embodiment, a system includes a video multipoint control unit (MCU) and an audio conferencing bridge, the audio conferencing bridge being operable to receive audio streams from audio-only and video endpoints, and to negotiate video sessions between each of the video endpoints and the video MCU. In response to detecting when one of the video endpoints is an active speaker, the audio conferencing bridge transmitting a dummy audio stream over a dummy audio channel from the audio conferencing bridge to the video MCU. The dummy audio stream causes the video MCU to switch an image in a video output stream. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure.
摘要翻译：在一个实施例中，系统包括视频多点控制单元（MCU）和音频会议桥，音频会议桥可操作以从仅音频和视频端点接收音频流，以及协商每个视频端点之间的视频会话和视频MCU。响应于检测到其中一个视频端点是活动扬声器，音频会议桥将虚拟音频流从音频会议桥传输到视频MCU。虚拟音频流使视频MCU切换视频输出流中的图像。要强调的是，该摘要被提供以符合要求抽象的规则，允许搜索者或其他读者快速确定技术公开内容的主题。

9. 发明申请

US20050078171A1 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：US20050078171A1
公开(公告)日：2005-04-14
申请号：US10703859
申请日：2003-11-06
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.
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。

10. 发明申请

US20050248652A1 System and method for performing distributed video conferencing 有权
公开(公告)号：US20050248652A1
公开(公告)日：2005-11-10
申请号：US11180826
申请日：2005-07-12
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： H04L65/605 , H04L12/1822 , H04L65/4046 , H04M3/567 , H04N7/15 , H04N7/152
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.

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