Asynchronous video event and transaction data multiplexing technique for surveillance systems

  • US 5,920,338 A
  • Filed: 11/04/1997
  • Issued: 07/06/1999
  • Est. Priority Date: 04/25/1994
  • Status: Expired due to Fees
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First Claim
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1. A system for providing verifiable surveillance data by selectively positioning digital data on a video image without obscuring the video image, comprising:

  • a) means for generating video signals of behavioral events corresponding to a desired transaction and marking the video signals with a sequence code from a sequence code source;

    b) means for storing the sequence coded video signals in a predetemined recording medium;

    c) means for generating digital signals representing data for said transaction, said digital signals including signals representing alphanumeric characters corresponding to the transaction, and marking the digital signal with a matching sequence code signal from an electronic system source common to the source in step a);

    d) means for storing the sequence coded digital signal in a recording medium different from said predetermined recording medium;

    e) means for retrieving selected stored video signals via its sequence code signal;

    f) means for retrieving selected stored digital signals via its sequence code signal;

    g) means for forming a composite vide-digital signal by selectively superimposing retrieved digital signals on the corresponding retrieved video signals of step e) wherein the digital signals overlie the corresponding behavioral event so as not to obscure the video signal;

    h) means for verifying that the video and digital signals have not been altered or otherwise tampered with; and

    i) means for displaying the composite video signal on a monitor.

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