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Copy protection for analog video signals from computing devices

  • US 7,398,008 B2
  • Filed: 09/19/2002
  • Issued: 07/08/2008
  • Est. Priority Date: 09/19/2002
  • Status: Expired due to Fees
First Claim
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1. A method of processing a video signal from a computing device, the video signal including a first plurality of valid signal pulses, the method comprising the steps of:

  • generating a first plurality of invalid signal pulses onto the video signal;

    generating afirst pulse sequence identifier onto the video signal;

    transmitting the video signal to a display device;

    decoding the first pulse sequence identifier from the video signal to distinguish the first plurality of valid signal pulses and the first plurality of invalid signal pulses, and to determine the location of a second pulse sequence identifier embedded in the video signal; and

    generating an output video signal from the video signal based on only the first plurality of valid signal pulses.

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