Multimedia coordination system

专利名称：Multimedia coordination system发明人：Pavel Curtis,Michael D. Dixon,Ronald A.

Frederick,David A. Nichols

申请号：US10004114申请日：20011206公开号：US06772335B2公开日：20040803

专利附图：

摘要：In a network, a media coordination system provides secure multimedia

communication channels in a collaborative network environment. The media coordinationsystem provides automatic encryption, dynamic interconnection of streams of data, and

user interface elements that provide users with control over the ultimate destination oftheir audio and video data. The infrastructure of the system includes a plurality of clientworkstations that are connected to a central server using point-to-point networkconnections. The central server maintains a persistent virtual world of network placeswith objects located therein. Streams of audio and video data are coordinated betweenclient workstations operating in the persistent virtual world by a key manager objectusing channels, transmitters, and receivers. The client workstations multicast their audioand video data over the network to defined recipients after receiving a multicast addressand an encryption key for a specific multicast channel. In order to protect the privacy ofall communications and the integrity of the coordination system, each client workstationretains significant control over distribution and reception of audio and video data sincemulticast transmission is tied to specific user interface elements. The multimedia userinterface elements include cameras, speakers, microphones, and video panes. Since thecentral server only coordinates where audio and video data is broadcast for a particularinterface element, each client workstation ultimately controls the destination ofmultimedia data through selection of the element at the user interface.

申请人：XEROX CORPORATION

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