Dual in-band/out-of-band CATV system

Details Dual in-band/out-of-band CATV system Dual in-band/out-of-band CATV system

1991-09-17

1993-10-26

Eisenzopf, Reinhard J.

Telecommunications

Audience survey or program distribution use accounting

455 62, 358 84, 358 86, H04B 1700

Patent

active

052573966

ABSTRACT:
A dual in-band/out-of-band CATV receiver includes a coupler that couples input signals to a tuner and decoder for demodulation and recovery of in-band data and to an FSK receiver for recovery of out-of-band data. The recovered data outputs of the decoder and of the FSK receiver are coupled to a data switch that has a common output that is coupled to a tuner/decoder microprocessor. The tuner/decoder microprocessor in turn supplies information to a switch microprocessor for controlling operation of the data switch to couple either in-band or out-of-band data to the tuner/decoder microprocessor. The data switch defaults to the in-band data position whenever a channel change occurs.

REFERENCES:
patent: 3869564 (1975-03-01), Colodny
patent: 4015074 (1977-03-01), Inoue et al.
patent: 4427995 (1984-01-01), Naito
patent: 4507680 (1985-03-01), Freeman
patent: 4523190 (1985-06-01), De Roo
patent: 4527194 (1985-07-01), Sirazi
patent: 4558464 (1985-12-01), O'Brien, Jr.
patent: 4677685 (1987-06-01), Kurisu
patent: 4716410 (1987-12-01), Nozaki
patent: 5091937 (1992-02-01), Kawasaki

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