Control signal apparatus for CATV system
AssigneeVeripen, Inc.
InventorRobert W. Freund
Life of this patent
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AssigneeVeripen, Inc.
InventorRobert W. Freund
Estimating the term…
In a cable or CATV system consisting of a central station with a television transmitter connected via a television transmission cable to a plurality of remote stations each with a television receiver, there is provided apparatus for signalling between the central and remote stations. The apparatus includes at the central station pulse generating means for transmitting via the cable variable sets of packets of first frequency signals followed by a packet of second frequency signal. Each of the remote stations is assigned a specific set of the first frequency signals. In each remote station the packets of first frequency signals are converted to a set of first pulses and the packet of second frequency signal to a second pulse. Counting means count the first pulses of the set and if the count at the time the second pulse is received agrees with a count assigned to the remote station an indication is given.
In a cable television system having a central station with a television transmitter and a plurality of remote stations connected thereto via a television transmission cable, said remote stations having television receivers, apparatus for transmitting signals other than television signals between the central station and the remote stations comprising:
A control signal generator comprising first means for converting packets of first frequency signals to first pulses, second means for converting packets of second frequency signals to second pulses, a multiposition pulse counting means connected to said first means for accumulating counts of the first pulses, count decoder means connected to the more-significant positions of said pulse counting means and sampled by said second pulses for emitting an indication only when a predetermined count is accumulated by said pulse counting means, signal generating means connected to the lesser-significant positions of said pulse counting means and to said count decoder means for generating a control signal determined by the binary state of at least one of said lesser significant positions when said count decoder means is emitting an indication during the occurrence of one of the second pulses, and means responsive to the trailing edge of said second pulse for clearing the count accumulated by said pulse counting means.
Dependencies are inferred from the claim text.