Telecommunications – Interference signal transmission
Patent
1995-05-17
1997-10-14
Peng, John K.
Telecommunications
Interference signal transmission
455 61, 455 62, 348 10, 348 12, 348555, H04N 546, H04N 714
Patent
active
056781733
ABSTRACT:
The present invention is directed to a CATV system in which a broadcasting multiple signal including a plurality of types of broadcasting signals modulated by at least two different modulation techniques is sent to a CATV terminal device from a CATV broadcasting device. In the CATV terminal device, the broadcasting signal corresponding to a requested channel is selected from the sent broadcasting multiple signal. The selected broadcasting signal is sent to a plurality of types of demodulation means respectively corresponding to the modulation techniques. The modulation technique by which the broadcasting signal corresponding to the requested channel is modulated is judged on the basis of data representing the relationship between each of channels sent from the CATV broadcasting device and the modulation technique by which the broadcasting signal corresponding to the channel is modulated. An output of the demodulating means corresponding to the judged modulation technique is selected out of outputs of the plurality of types of demodulating means.
REFERENCES:
patent: 5083205 (1992-01-01), Arai
patent: 5355162 (1994-10-01), Yazolino et al.
Flynn Nathan J.
Peng John K.
Sanyo Electric Co,. Ltd.
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