Television – Special applications – Manufacturing
Patent
1996-04-03
1999-11-09
Casler, Brian L.
Television
Special applications
Manufacturing
348 10, 348 6, H04N 710
Patent
active
059824131
ABSTRACT:
By transmitting an analog CATV signal output from a CATV-HE (CAble TeleVision-Head End) to an HDT (Host Digital Terminal), an analog transmission channel for transmitting the analog CATV signal to an ONU (Optical Network Unit) is included in a path housing a digital transmission channel for transmitting a digital service signal for individual distribution service to the ONU. Furthermore, a digital service signal for multicast service is modulated and converted into an analog service signal by a modulator in the HDT. Then, the converted signal is mixed with the analog CATV signal, and transmitted to the ONU. Accordingly, each of the ONUs is equipped with only a built-in modulator for modulating the digital service signal for individual distribution service.
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Hijikata Toshiyuki
Inoko Katsutoshi
Irie Toshio
Nakagaki Tatsuru
Suzuki Hiroyuki
Casler Brian L.
Din Luanne P.
Fujitsu Limited
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