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Apparatus for detecting the number of beats

  • US 5,614,687 A
  • Filed: 12/15/1995
  • Issued: 03/25/1997
  • Est. Priority Date: 02/20/1995
  • Status: Expired due to Term
First Claim
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1. An apparatus for detecting the number of beats comprising:

  • extract means for extracting a predetermined frequency component from an input audio signal;

    level detecting means for generating a detection signal when detecting that a level of the predetermined frequency component extracted by said extract means is higher than a predetermined level;

    first time measuring means for measuring a predetermined period in response to said detection signal;

    means for prohibiting said level detecting means from generating said detection signal during measuring time of said first measuring means;

    second time measuring means for starting to measure time in response to said detection signal and, after that, terminating measuring of time in response to a detection signal newly generated from said level detecting means; and

    converting means for converting a period of time measured at termination of measuring of said second time measuring means into the number of beats per predetermined unit time regarded as a unit beat.

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