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Method and apparatus for surveying a predetermined surveillance area

  • US 6,628,323 B1
  • Filed: 11/19/1999
  • Issued: 09/30/2003
  • Est. Priority Date: 06/04/1997
  • Status: Expired due to Fees
First Claim
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1. A process for surveying a given surveillance area, using a detection device, especially at least one video camera and/or microphone, comprising the steps of:

  • a) during a surveillance period, continuously determining a plurality of characteristic data sets from instantaneous signal segments of signals generated by the detection device by automatic signal analysis;

    b) continuously storing said plurality of characteristic data sets in a database;

    c) performing a statistical comparison between a characteristic data set of an instantaneous signal segment of a signal generated by the detection device and at least one decision area generated from said plurality of characteristic data sets stored in the database;

    d) generating an alarm signal if the statistical deviation calculated by the statistical comparison exceeds a statistically determined value range calculated from the plurality of characteristic data sets stored in the database.

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