Multichannel digital signal generation method and apparatus

Details Multichannel digital signal generation method and apparatus Multichannel digital signal generation method and apparatus

1998-05-18

2000-11-14

Barron, Jr., Gilberto

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

70871802, 327106, 332170, 348388, 348723, 370482, 380219, 380221, 455109, H03C 160, H04J 106, H04N 712

Patent

active

061483206

ABSTRACT:
A multichannel television access control system is disclosed wherein processing of the broadband signal is performed by gated coherent RF injection on a plurality of channels, thereby effecting selective descrambling of an arbitrary subset of channels in a channel group. The system provides for a closed loop injection signal phasor control so as to maintain substantially constant relationship between the television signals and the injected signals. The combined signals are supplied to subscribers enabling the use of their cable ready equipment.

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patent: 4349704 (1982-09-01), Gillis
patent: 4761798 (1988-08-01), Griswold, Jr. et al.
patent: 4845436 (1989-07-01), Kobayashi et al.
patent: 5121348 (1992-06-01), Dea et al.
patent: 5162763 (1992-11-01), Morris

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