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Device for perceptual weighting in audio encoding/decoding

  • US 8,260,620 B2
  • Filed: 02/07/2007
  • Issued: 09/04/2012
  • Est. Priority Date: 02/14/2006
  • Status: Expired due to Fees
First Claim
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1. A perceptual weighting device for coding/decoding of an audio signal in a given frequency band, said coding/decoding being effected in a plurality of adjacent sub-bands in said given frequency band, wherein said device includes, in at least one sub-band of the plurality of adjacent sub-bands, a perceptually weighted filter with gain compensation, said perceptually weighted filter with gain compensation being in the form of fac*Â

  • (z/γ

    1)/Â

    (z/γ

    2) where Â

    (z) represents a linear prediction filter, with 0≦

    γ

    2

    1 and 0≦

    γ

    1

    1, and fac represents a gain compensation factor which is a function of coefficients of said linear prediction filter Â

    (z), the gain compensation being adapted to realize spectral continuity between an output signal of said perceptually weighted filter with gain compensation and signals in sub-bands adjacent to said at least one sub-band, said gain compensation factor fac being given by;

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