Patents Assigned to Multichannel Communication Sciences, Inc.
  • Broadband television scrambling and descrambling system
    Patent number: 5864621
    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.
    Type: Grant
    Filed: June 12, 1996
    Date of Patent: January 26, 1999
    Assignee: Multichannel Communication Sciences, Inc.
    Inventor: Ron D. Katznelson
  • Simultaneous multichannel television access control system and method
    Patent number: 5754650
    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.
    Type: Grant
    Filed: May 3, 1995
    Date of Patent: May 19, 1998
    Assignee: Multichannel Communication Sciences, Inc.
    Inventor: Ron D. Katznelson
  • Multichannel television signal scrambling and descrambling system and method
    Patent number: 5430799
    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.
    Type: Grant
    Filed: April 25, 1994
    Date of Patent: July 4, 1995
    Assignee: Multichannel Communications Science, Inc.
    Inventor: Ron D. Katznelson