Interactive video distribution systems – Video distribution system with upstream communication – Server or headend
Reexamination Certificate
2007-06-12
2007-06-12
Miller, John (Department: 2623)
Interactive video distribution systems
Video distribution system with upstream communication
Server or headend
C725S129000, C725S144000, C398S072000
Reexamination Certificate
active
09923038
ABSTRACT:
In a hybrid fiber coax (HFC) cable system, data is communicated upstream from user terminals to a headend of the system to realize various interactive services. The user terminals generate analog modulated signals representing the user data, which populate different channels in a reverse passband of the system. In accordance with the invention, the analog modulated signals are transformed to the corresponding digital baseband signals containing the data. The resulting digital baseband signals are optically transmitted to the headend, thereby efficiently utilizing the limited capacity of the fiber optical portion of the HFC cable system.
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Chowdhury Sumaiya A.
Miller John
Straub Michael P.
Straub & Pokotylo
Time Warner Cable
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