Interactive video distribution systems – Video distribution system with upstream communication – Transmission network
Reexamination Certificate
2004-08-02
2011-10-04
Koenig, Andrew (Department: 2423)
Interactive video distribution systems
Video distribution system with upstream communication
Transmission network
C370S294000, C370S395620, C370S503000, C370S518000, C370S535000, C370S537000, C375S355000, C375S356000, C375S358000, C375S364000
Reexamination Certificate
active
08032916
ABSTRACT:
An optical signal return path system analog RF signals are sampled using a master clock frequency, and combined with digital data such as Ethernet data at a cable node. The cable node sends the combined signals on a return path over a fiber optic medium to the cable hub. The cable hub extracts an approximate in-frequency replicate of a master clock signal, and can use the replicate master clock signal to desample the digitized RF signals back to analog. The cable hub can further use the replicate of the master clock signal to serialize Ethernet data, and send the Ethernet data back to the cable node via an optical cable in the forward direction. Accordingly, a single master clock signal can be used on a CATV network for encoding/decoding, and transmitting a variety of data signals, which enhances the integrity and reliability of the data signals.
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Gordy Stephen Charles
Lawson Arthur Michael
Oyadomari Randy Ichiro
Featherstone Mark
Finisar Corporation
Koenig Andrew
Maschoff Gilmore & Israelsen
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