Method and device for noise filling

G - Physics – 10 – L

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G10L 19/02 (2006.01) G10L 21/02 (2006.01) H04B 1/66 (2006.01)

Patent

CA 2698031

A method for perceptual spectral decoding comprises decoding of spectral coefficients recovered from a binary flux into decoded spectral coefficients of an initial set of spectral coefficients. The initial set of spectral coefficients are spectrum filled. The spectrum filling comprises noise filling of spectral holes by setting spectral coefficients in the initial set of spectral coefficients not being decoded from the binary flux equal to elements derived from the decoded spectral coefficients. The set of reconstructed spectral coefficients of a frequency domain formed by the spectrum filling is converted into an audio signal of a time domain. A perceptual spectral decoder comprises a noise filler, operating according to the method for perceptual spectral decoding.

L'invention concerne un procédé de décodage spectral perceptuel qui consiste à décoder des coefficients spectraux récupérés à partir d'un flux binaire en coefficients spectraux décodés d'une série initiale de coefficients spectraux. La série initiale de coefficients spectraux représente un spectre rempli. Le remplissage de spectre consiste à remplir avec du bruit des trous spectraux en fixant les coefficients spectraux dans la série initiale de coefficients spectraux non décodés du flux binaire égaux aux éléments dérivés des coefficients spectraux décodés. La série de coefficients spectraux reconstitués d'un domaine de fréquence formé par le remplissage de spectre est convertie en un signal audio d'un domaine de temps. Un décodeur spectral perceptuel selon l'invention comprend un bruit de remplissage, qui fonctionne selon le procédé de décodage spectral perceptuel.

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