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Audio waveform reproduction apparatus

  • US 6,721,711 B1
  • Filed: 10/18/2000
  • Issued: 04/13/2004
  • Est. Priority Date: 10/18/1999
  • Status: Expired due to Fees
First Claim
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1. An audio waveform reproduction apparatus, comprising:

  • a storage means for storing waveform data representing an audio waveform;

    a reproduction tempo information input means for inputting reproduction tempo information expressing a tempo for a time when the audio waveform is reproduced;

    a first time function production means for producing first information (TP) that is a time function based on the reproduction tempo information;

    a second time function production means for producing second information (PP) that is a time function based on time axis compression/expansion information (TR);

    a time axis compression/expansion information production means for comparing the first information and the second information and calculating the time axis compression/expansion information (TR) towards matching the temporal change of the second information with the temporal change of the first information; and

    a time axis compression/expansion processing means for subjecting the audio waveform to time axis compression/expansion processing based on the time axis compression/expansion information (TR) to produce a reproduction audio waveform;

    wherein the first information (TP) and the second information (PP) represent positions on a common axis.

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