Interactive video distribution systems – Video distribution system with upstream communication – Transmission network
Reexamination Certificate
2002-10-29
2009-11-24
Huynh, Son P (Department: 2424)
Interactive video distribution systems
Video distribution system with upstream communication
Transmission network
C725S064000, C725S069000, C725S071000, C725S078000, C725S081000, C725S131000
Reexamination Certificate
active
07624419
ABSTRACT:
Information indicating which of channels is selected in a digital broadcasting receiver17is fed from a control signal transmitter16to a retransmitter14. A terrestrial wave digital broadcasting wave from a transmitting station is inputted to a channel selection filter6through an indoor receiving antenna1and an automatic gain controller4in the retransmitter14, and only a signal having a frequency component corresponding to the channel selected by the digital broadcasting receiver17is extracted, and is transmitted toward the digital broadcasting receiver17by a retransmission indoor antenna13through a variable gain amplifier7.
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Huynh Son P
Sanyo Electric Co,. Ltd.
Westerman Hattori Daniels & Adrian LLP
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