Cable broadcasting system

Details Cable broadcasting system Cable broadcasting system

2005-05-31

2005-05-31

Grant, Chris (Department: 2611)

Interactive video distribution systems

Video distribution system with upstream communication

Transmission network

C725S148000, C725S130000, C725S127000

Reexamination Certificate

active

06901605

ABSTRACT:
In a cable broadcasting system of the invention capable of setting output or stop of broadcasting-signals from tap output terminals of a tap device in response to a command signal transmitted by a center equipment, when demand for output setting for many tap devices occurs, output setting of the corresponding tap devices can be surely carried out without increasing the load on each power supply device for supplying the tap devices in each district with electricity. When demand for setting tap output of plural tap device occurs, a head-end controller reads output setting data for all the tap devices which are the objects of tap output setting and transmits command signals in order to tap devices at a rate of one tap device per each district covered by a power supply device. The interval of transmission of command signals to one district is controlled to be longer than or equal to the time Δtn necessary for the tap device to which a command signal was previously transmitted to finish tap output setting operation.

REFERENCES:
patent: 4118669 (1978-10-01), Fung
patent: 4367557 (1983-01-01), Stern et al.
patent: 5953044 (1999-09-01), Kato et al.
patent: 6033101 (2000-03-01), Reddick et al.
patent: 6067440 (2000-05-01), Diefes
patent: 6130703 (2000-10-01), Spriester et al.
patent: 6453473 (2002-09-01), Watson, Jr.
patent: 6463588 (2002-10-01), Jenkins et al.

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