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Television broadcast system for selective transmission of viewer-chosen programs at viewer-requested times

DC CAFC
  • US 4,995,078 A
  • Filed: 10/10/1989
  • Issued: 02/19/1991
  • Est. Priority Date: 06/09/1988
  • Status: Expired due to Term
First Claim
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1. A method of operating a television transmission system using land lines for transmitting television programs for reception by a plurality of receivers coupled with land lines for viewing the programs on the receivers by viewers respectively associated therewith, the system including means for selectively preventing intelligible viewing of certain programs by certain receivers, said method comprising the steps of:

  • providing a collection of stored programs stored on a medium allowing selective reproduction and real-time transmission of said stored programs over the land lines;

    selecting a prospective chosen program from said collection for transmission at a requested time in response to a request therefor from a requesting viewer;

    transmitting said chosen program in real-time over the land lines at said requested time for reception by and viewing on a receiver associated with said requested viewer;

    preventing intelligible viewing of said chosen program at said requested time on receivers other than said receiver associated with said requesting viewer;

    identifying a section of the land lines having a subset of receivers operably coupled thereto wherein said subset includes a plurality of receivers less than the total number of receivers included in the system, and remaining portions of the land lines having a plurality of receivers other than said subset coupled thereto,transmitting said chosen program over said section of the land lines,identifying a juncture between said section and said remaining portion, andpreventing transmission of said chosen program beyond the juncture from said section to said remaining portion by use of a blocking device located at said juncture.

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