Perceptual weighting device and method for efficient coding of wideband signals

Perceptual weighting device and method for efficient coding of wideband signals

CN
  • CN 1,127,055 C
  • Filed: 10/27/1999
  • Issued: 11/05/2003
  • Est. Priority Date: 10/27/1998
  • Status: Active Grant
First Claim
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1. perceptual weighting device, be used for a broadband acoustical signal is responded, produce the signal of a perceptual weighting, to reduce the difference between a weighting broadband acoustical signal and weighting broadband acoustical signal that is synthesized subsequently, described perceptual weighting device comprises:

  • A) a signal preemphasis filter responds to this broadband acoustical signal, is used to strengthen the high fdrequency component of this broadband acoustical signal, produces the signal of a pre-emphasis thus;

    B) a composite filter counter responds to this preemphasized signal, is used to produce the composite filter coefficient;

    WithC) perceptual weighting wave filter, this preemphasized signal and composite filter coefficient are responded, be used for coming this preemphasized signal is carried out filtering with respect to the composite filter coefficient, the signal of sensigenous weighting thus, the denominator of the transfer function of this perceptual weighting wave filter is fixed, and in a resonance peak zone this broadband acoustical signal is weighted and can separates with a spectral tilt to this broadband acoustical signal thus.

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