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Video scrambling by segmenting video information lines

  • US 4,736,420 A
  • Filed: 09/19/1986
  • Issued: 04/05/1988
  • Est. Priority Date: 09/19/1986
  • Status: Expired due to Term
First Claim
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1. A system for scrambling a video signal having a plurality of horizontal lines, each of which includes a video information portion and a non-video information portion, comprisinga memory;

  • means for storing the video information portion of each video signal line in the memory; and

    means for forming scrambled horizontal lines by retrieving each of a plurality of said stored video information lines in a plurality of segments preceded by a non-video segment and separated by non-video segment(s);

    wherein the retrieval means includemeans for varying the respective durations of the retrieved video information segments in individual scrambled horizontal lines; and

    means for varying the total duration of the non-video segments for individual scrambled horizontal lines.

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