Interactive video distribution systems – Video distribution system with upstream communication – Transmission network
Reexamination Certificate
2007-05-22
2007-05-22
Vu, Ngoc (Department: 2623)
Interactive video distribution systems
Video distribution system with upstream communication
Transmission network
C725S127000, C725S129000, C398S071000
Reexamination Certificate
active
10285205
ABSTRACT:
A Cable Television (CATV) digital return link system that provides dedicated, high-speed, full-duplex and point-to-point connections between users and the head end system is disclosed. The CATV digital return link system includes return path transmitters, intermediate hubs and a head end hub coupled to each other via a network of fiber optics cables. The return path transmitters are each coupled to a relatively large number of users via a local CATV-subtree. Signals from cable modems are transmitted via the local CATV-subtree to the return path transmitters for transmission to the head end. A number of users are individually and directly connected to the return path transmitters. Data from these directly connected users is transmitted to the head end via the network of fiber optics cables in conjunction with the RF data from the subtree. Likewise, data from the head end to these directly connected users is transmitted in the forward path direction using the digital return link system.
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Lawson Arthur Michael
Levinson Frank H.
Mostert Willem A.
Sage Gerald F.
Finisar Corporation
Vu Ngoc
Workman Nydegger
LandOfFree
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