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Method and apparatus for synchronizing audio and video components of multimedia presentations by identifying beats in a music signal

  • US 7,301,092 B1
  • Filed: 04/01/2004
  • Issued: 11/27/2007
  • Est. Priority Date: 04/01/2004
  • Status: Active Grant
First Claim
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1. A computer-implemented method of detecting a fundamental beat frequency in a predetermined time interval of a music signal, comprising:

  • a) processing a music signal with the discrete wavelet transform to obtain a set of coefficients;

    b) processing a subset of the coefficients to obtain a plurality of candidate beat frequencies contained in the corresponding portion of the music signal;

    c) determining the harmonic relationships between the candidate beat frequencies;

    d) determining the fundamental beat frequency based upon the determined harmonic relationships; and

    e) storing information about the determined fundamental beat frequency in a memory for use in production of a multimedia composition.

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