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Dual-step sound pattern matching

  • US 4,776,017 A
  • Filed: 04/30/1986
  • Issued: 10/04/1988
  • Est. Priority Date: 05/01/1985
  • Status: Expired due to Fees
First Claim
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1. A method for identifying an unknown sound having a registration mode and an identification mode, wherein, during the registration mode, said method comprising the steps of:

  • forming a time-dependent first pattern from a sound inputted to be registered; and

    storing said first pattern as a first reference pattern while adding a predetermined portion of said first pattern together to define a second reference pattern and storing said second reference pattern, whereby first and second reference patterns are stored for various sounds to be registered;

    during the identification mode, said method comprising the steps of;

    forming a time-dependent second pattern from an unknown sound inputted to be identified;

    adding a predetermined portion of said second pattern together to define a comparison pattern;

    comparing said comparison pattern with said stored second reference patterns, thereby selecting those second reference patterns which have at least a predetermined level of similarity with said comparison pattern; and

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