| 摘要 |
Multi-user communication of multimedia content in a client-server system is provided by dividing a client's scene into non-shared and shared parts. In one embodiment, the non-shared parts of the scene are organized into one or more MPEG-4 Group nodes. The shared parts of the scene are organized into one or more multi-user group nodes, each of which is an extension of an MPEG-4 Group node. In addition to the functionality provided by an MPEG-4 Group node, a multi-user group node provides boolean exposed fields that act as switches to control initiation of interaction, update control, privacy, and object accessibility.
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