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Coding apparatus for digital signal

  • US 5,264,846 A
  • Filed: 03/27/1992
  • Issued: 11/23/1993
  • Est. Priority Date: 03/30/1991
  • Status: Expired due to Term
First Claim
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1. An apparatus for compressing a digital input signal, the apparatus comprising:

  • a deriving mans for deriving from the digital input signal plural spectral components in the frequency domain, the spectral components being divided into blocks corresponding to critical bands;

    means for dividing one of the blocks of spectral components corresponding to critical bands in frequency into sub blocks;

    peak value determining means for determining a peak value for each sub block;

    comparing means for determining a difference in the peak values of the sub blocks; and

    block floating means for applying block floating processing to the sub blocks individually when the difference from the comparing means is above a fixed value.

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