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Effective deployment of temporal noise shaping (TNS) filters

  • US 8,452,431 B2
  • Filed: 12/22/2009
  • Issued: 05/28/2013
  • Est. Priority Date: 03/29/2000
  • Status: Expired due to Term
First Claim
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1. A method comprising:

  • calculating a filter for each of a plurality of frequency bands;

    determining a distance between coefficients in adjacent frequency bands;

    clustering the filters into at least two groups based on energies in each of the frequency bands covered by the filters;

    merging the clustered filters with a shortest distance between coefficients; and

    processing audio signals using the merged filters.

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