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Audio signal processing apparatus and recording and/or reproducing apparatus for a tape-shaped recording medium

  • US 5,748,397 A
  • Filed: 02/14/1997
  • Issued: 05/05/1998
  • Est. Priority Date: 06/24/1994
  • Status: Expired due to Fees
First Claim
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1. A recording and/or reproducing apparatus for a tape-shaped recording medium, the apparatus comprising:

  • a recording and/or reproducing head for recording and/or reproducing analog signals on and/or from the tape-shaped recording medium;

    detecting means for detecting a variation in a transport speed of the tape-shaped recording medium relative to a rated transport speed and generating a cycle fluctuation coefficient; and

    compensating means connected to the detecting means and the recording and/or reproducing head for modifying the analog signals read out from or to be recorded on the tape-shaped recording medium by the head based on the cycle fluctuation coefficient from the detecting means so as to compensate for the variation in the transport speed of the tape-shaped recording medium relative to the rated transport speed and outputting compensated analog signals or supplying the compensated analog signals to the head,wherein the compensating means comprises;

    clock pulse generating means;

    A/D conversion means connected to the recording and/or reproducing head and the clock pulse generating means for converting the analog signals read from or to be recorded on the tape-shaped recording medium by the head into digital data in response to clock pulses from the clock pulse generating means; and

    signal converting means connected to the A/D conversion means and the detecting means for converting the digital data from the A/D conversion means to the compensated analog signals based on the cycle fluctuation coefficient so as to compensate for the variation in the transport speed of the tape-shaped recording medium relative to the rated transport speed, andwherein the signal converting means comprises;

    interpolation means connected to the A/D conversion means and the detecting means for performing interpolation processing on the digital data from the A/D conversion means and outputting interpolated digital signals based on the cycle fluctuation coefficient, whereby the interpolated digital signals represent a digital signal that would be obtained if the tape-shaped recording medium was transported at the rated transport speed; and

    D/A conversion means connected to the interpolation means for converting the interpolated digital signals from the interpolation means into the compensated analog signals.

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