System and method for performing distributed video conferencing
    7.
    发明授权
    System and method for performing distributed video conferencing 有权
    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

    IPC分类号: H04N7/14

    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。

    MPEG file format optimization for streaming
    8.
    发明授权
    MPEG file format optimization for streaming 有权
    用于流式传输的MPEG文件格式优化

    公开(公告)号:US06965646B1

    公开(公告)日:2005-11-15

    申请号:US09606419

    申请日:2000-06-28

    IPC分类号: H04N7/18 H04N7/24 H04N7/60

    CPC分类号: H04N21/6437 H04N21/236

    摘要: MPEG data is packetized and streamed using a two phase procedure. First, the system parses MPEG data and reformats it into RTP sized packets in preparation for conversion to an RTP stream. This reformatting phase is done prior to streaming and typically only performed once for each MPEG file and network type. After reformatting, the MPEG data is contained in a modified MPEG bitstream that includes annotations that inform a network server that the modified MPEG stream is specially reformatted to facilitate RTP packetization. In the second phase, a network server encapsulates the reformatted MPEG data within RTP packets and streams the data onto the network for real-time playback. As a result of reformatting the MPEG data prior to transmission, the real-time demands of an MPEG to RTP conversion are greatly reduced.

    摘要翻译: MPEG数据被打包并使用两相程序流式传输。 首先,系统解析MPEG数据并将其重新格式化为RTP大小的数据包,以准备转换为RTP流。 此重新格式化阶段在流式传输之前完成,通常只对每个MPEG文件和网络类型执行一次。 在重新格式化之后,MPEG数据被包含在修改的MPEG比特流中,该MPEG比特流包括通知网络服务器的特别重新格式化以便于RTP分组化的注释。 在第二阶段,网络服务器将重新格式化的MPEG数据封装在RTP分组中,并将数据流传输到网络上进行实时播放。 作为在传输之前重新格式化MPEG数据的结果,MPEG到RTP转换的实时需求大大降低。

    System and method for performing distributed video conferencing
    9.
    发明授权
    System and method for performing distributed video conferencing 有权
    用于执行分布式视频会议的系统和方法

    公开(公告)号:US07477282B2

    公开(公告)日:2009-01-13

    申请号:US11180826

    申请日:2005-07-12

    IPC分类号: H04N7/14 H04M3/42

    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。

    Authenticating an endpoint using a STUN server
    10.
    发明授权
    Authenticating an endpoint using a STUN server 有权
    使用STUN服务器验证端点

    公开(公告)号:US07908480B2

    公开(公告)日:2011-03-15

    申请号:US11087050

    申请日:2005-03-21

    CPC分类号: H04L63/08 H04L9/3271

    摘要: Authenticating an endpoint using a STUN server includes facilitating a communication session between a first endpoint and a second endpoint over a network. A challenge request is sent to the second endpoint. The challenge request attempts to authenticate the second endpoint and includes an identification. The identification is associated with an expected response identification. A response to the challenge request is received from the second endpoint. The response has an actual response identification. The received response is verified to establish whether the second endpoint is legitimate. The second endpoint is legitimate if the actual response identification includes the expected response identification.

    摘要翻译: 使用STUN服务器认证端点包括促进通过网络的第一端点和第二端点之间的通信会话。 挑战请求被发送到第二端点。 挑战请求尝试认证第二个端点并包含一个标识。 识别与预期响应标识相关联。 从第二端点接收到对质询请求的响应。 响应具有实际的响应标识。 验证接收到的响应以确定第二端点是否合法。 如果实际的响应标识包括预期的响应标识,则第二个端点是合法的。