Abstract: A cable television control apparatus includes a television channel access controller connected at a node of a cable television network between the network and at least one subscriber household. All available cable television channels, including premium channels, can be transmitted by the headend without scrambling. Each access controller receives channel selection signals, such as television tuner local oscillator signals, from within subscriber households. The controller detects the channel selection signal and identifies selected channels. A channel filtering system is tuned in accordance with the detected selection signal to pass only selected channels to subscribers while blocking all other channels.
Type:
Grant
Filed:
September 18, 1998
Date of Patent:
July 24, 2001
Assignee:
Watson Technologies
Inventors:
John C. Watson, Jr., Arthur W. Vemis, Mark H. Olinsky, William D. Sparks
Abstract: A cable television control apparatus includes a television channel access controller connected at a node of a cable television network between the network and at least one subscriber household. All available cable television channels, including premium channels, can be transmitted by the headend without scrambling. Each access controller receives channel selection signals, such as television tuner local oscillator signals, from within subscriber households. The controller detects the channel selection signal and identifies selected channels. A channel filtering system is tuned in accordance with the detected selection signal to pass only selected channels to subscribers while blocking all other channels.
Type:
Grant
Filed:
April 12, 1995
Date of Patent:
September 22, 1998
Assignee:
Watson Technologies
Inventors:
John C. Watson, Jr., Arthur W. Vemis, Mark H. Olinsky, William D. Sparks