| 摘要 |
The present invention teaches a system for providing digital data services to a client comprising: providing client-generic multicast data including a plurality of multicast groups to a data distribution system, wherein each multicast group includes at least one digital data service; re-formatting the client-generic multicast data in a fast transmission format; transmitting the fastally formatted client-generic multicast data to at least one distribution node; re-formatting the fastally formatted client-generic transmission in a format suitable for client-specific delivery to at least one client; receiving a client request for a selected multicast group at the at least one distribution node from a requesting client; at the at least one distribution node, routing the selected multicast group to the requesting client enabling the requesting client to access a selected digital data service from the multicast group and discard data contained within the selected multicast group not corresponding to the selected digital data service.
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