Bilateral communications system for distributing commerical and

Details Bilateral communications system for distributing commerical and Bilateral communications system for distributing commerical and

1973-10-26

1976-01-20

Wilbur, Maynard R.

Telegraphy

Systems

Simplex-reversing periodic

178DIG13, 325 31, 325308, H04N 144

Patent

active

039340791

ABSTRACT:
A bilateral communications system, as for CATV application, distributes commercially available and premium video programming on a subscriber demand--directly accountable basis. At least the premium video programming is impressed on the cable in a frequency band and/or format not recoverable by a standard television receiver, absent receipt at a particular subscriber location of a reception-authorizing message from the system head end.
A central processor at the system head end sequentially polls cable subscribers under stored program control, permitting bilateral digital communications between the subscriber and the head end.

REFERENCES:
patent: 3668307 (1972-06-01), Face et al.
patent: 3733430 (1973-05-01), Thompson et al.
patent: 3757225 (1973-09-01), Ulicki
patent: 3777053 (1973-12-01), Wittig et al.
patent: 3790700 (1974-02-01), Callais et al.

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