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CODING OF SPARSE DIGITAL MEDIA SPECTRAL DATA

  • US 20080312758A1
  • Filed: 06/15/2007
  • Published: 12/18/2008
  • Est. Priority Date: 06/15/2007
  • Status: Active Grant
First Claim
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1. A method of compressively encoding audio signal data containing a time series of audio signal samples as a compressed data stream, the method comprising:

  • transforming successive blocks of the audio signal data into sets of spectral coefficients;

    quantizing the spectral coefficients;

    for at least a portion of the spectral coefficients in the sets, detecting any spectral peaks out of the spectral coefficients in the portion;

    encoding information to represent at least some of the spectral peaks in the compressed data stream using at least one three value combination of a length of a run of zero-valued spectral coefficients and levels of two spectral coefficients following the run.

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