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Selecting a coupling scheme for each subband for estimation of coupling parameters in a transform coder for high quality audio

  • US 6,591,241 B1
  • Filed: 09/08/2000
  • Issued: 07/08/2003
  • Est. Priority Date: 12/27/1997
  • Status: Expired due to Term
First Claim
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1. A method for computing coupling parameters in a digital audio encoder wherein frequency coefficient sub-bands in a coupling frequency range are arranged into coupling bands, comprising the steps of:

  • determining a power value for each sub-band in the frequency range, selecting a coupling scheme for each sub-band based on the corresponding power value, and grouping adjacent sub-bands having the same selected coupling scheme into coupling bands.

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