×

Performance evaluator for use in a karaoke apparatus

  • US 5,557,056 A
  • Filed: 09/22/1994
  • Issued: 09/17/1996
  • Est. Priority Date: 09/23/1993
  • Status: Expired due to Fees
First Claim
Patent Images

1. A karaoke apparatus capable of evaluating the singing performance of a karaoke singer by measuring the incongruity between an accompanying music and the karaoke singer'"'"'s rendition to the accompanying music, which comprises:

  • a microphone for converting the singer'"'"'s rendition into an electrical voice signal;

    a first analog to digital converter (A/D) converter for converting the electrical voice signal into a digitized voice signal;

    an audiovisual equipment for producing the accompanying music;

    a second A/D converter for digitizing the accompanying music to produce a digitized accompaniment signal;

    a performance evaluator for measuring the difference between an energy distribution of the digitized voice signal and that of the digitized accompaniment signal to thereby evaluate the karaoke singer'"'"'s singing performance, wherein said performance evaluator includes;

    means for dividing the digitized voice signal and the digitized accompaniment signal into n groups, respectively, wherein each group contains a predetermined number of digitized subsignals, and calculating an energy for each of the n groups of the digitized voice and the accompaniment subsignals to produce n voice energies and n accompaniment energies, respectively;

    means for summing the n voice energies and the n accompaniment energies to produce a voice energy sum and an accompaniment energy sum, respectively;

    means for normalizing each of the n voice energies and each of the n accompaniment energies through the use of the voice energy sum and the accompaniment energy sum, respectively;

    means for producing an error rate by measuring the difference between each of the normalized n voice energies and each of the normalized n accompaniment energies; and

    means for calculating a score of the singer'"'"'s singing performance on a basis of the error rate.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×