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Indexing of audio/video data

  • US 5,321,396 A
  • Filed: 02/07/1991
  • Issued: 06/14/1994
  • Est. Priority Date: 02/07/1991
  • Status: Expired due to Fees
First Claim
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1. A system for providing for fast random access to a contiguous sequence of time-stamped data records of events in a specific physical environment, comprising:

  • a plurality of sensors, each monitoring a respective zone forming part of the physical environment, to detect the presence within respective ones of said zones of a person carrying a personal identifier in the form of a transmitter of signals to which said sensors are sensitive;

    means for interrogating said sensors at time intervals to construct sensor activity records specifying which identifiers were detected by each sensor during each of said intervals;

    means for processing the sensor activity records to produce time-stamped arrival/departure records specifying the period for which each person carrying an identifier is in a particular zone;

    means for producing at least audio and/or video time-stamped records of events taking place in each of the zones;

    means for specifying a search pattern incorporating parameters of a remembered event sought to be recalled or replayed, which parameters may include the time and/or date of the event, people involved, and/or location;

    means for scanning through the said list at high speed using the search pattern to arrive at each matching record of an event in which a specified person was, or a specified combination of people were present concurrently, in a specified zone;

    means for selecting one matching record and extracting from it the time-stamp information;

    means for issuing a command to play back to the user the audio and/or video recording corresponding to this time-stamp information, andmeans for presenting played back information to the user.

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