Multicast distribution of streaming multimedia content

Details Multicast distribution of streaming multimedia content Multicast distribution of streaming multimedia content

2008-01-29

2008-01-29

Ho, Duc (Department: 2619)

Multiplex communications

Channel assignment techniques

Messages addressed to multiple destinations

C370S401000, C370S352000, C370S390000

Reexamination Certificate

active

07324542

ABSTRACT:
For offering entertainment services by video streaming content to users, a video encoder creates the required .nsc file for each broadcast channel. This .nsc file is retrieved and stored on a server which notifies each set-top box in the field, via a multicast notifier of the availability of the new service. This notifier contains the multicast address and port to where the .nsc files are being streamed. Once the set-top box retrieves this notification, it attempts to join the dedicated multicast stream, download the .nsc files and store them locally in memory on the set-top box. When a user selects a broadcast channel from their lineup, the set-top box will access the local file to obtain the proper information about that particular ASF stream; hence, it will not have to do an HTTP retrieval.

REFERENCES:
patent: 2004/0090959 (2004-05-01), Cinghita et al.
patent: 2005/0097470 (2005-05-01), Dias et al.
Deering, S., Host Extensions for IP Multicasting, Stanford University Network Working Group, Aug. 1989.

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