Interactive video distribution systems – Video distribution system with upstream communication – Transmission network
Reexamination Certificate
2006-02-28
2006-02-28
Srivastava, Vivek (Department: 2617)
Interactive video distribution systems
Video distribution system with upstream communication
Transmission network
C715S252000, C715S252000, C715S252000
Reexamination Certificate
active
07007297
ABSTRACT:
A system is provided for combining conventional HFC plants with fiber-optic access systems (e.g., fiber-to-the-home or fiber-to-the-curb) that share a head-end and other equipment. A robust modulation format, such as QPSK, having a sufficient SNR to transmit information (e.g., data, digital audio and digital video) downstream to users' premises via a fiber-optic access system is used. Also, a method and apparatus is provided for converting a first modulation format for information received via a fiber-optic access system to a modulation format compatible with customer premises equipment.
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Srivastava Vivek
Ustaris Joseph G.
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