Systems, methods, and apparatus for anti-sparseness filtering

Details Systems, methods, and apparatus for anti-sparseness filtering Systems, methods, and apparatus for anti-sparseness filtering

G - Physics

10

L

G10L 21/02 (2006.01) G10L 19/12 (2006.01)

Patent

CA 2603246

A method and apparatus for generating a highband excitation signal (S120) including generating a spectrally extended signal by extending the spectrum of a signal (A400) that is based on an encoded lowband excitation signal (S50); and performing anti-sparseness filtering (600) of a signal that is based on the encoded lowband excitation signal. The highband excitation signal is based on the spectrally extended signal, and the highband excitation signal is based on a result of the anti-sparseness filtering.

Dans un mode de réalisation, l'invention porte sur un procédé de production d'un signal d'excitation de bande haute qui consiste à produire un signal de spectre étendu en étendant le spectre d'un signal basé sur un signal d'excitation de bande basse codé, et à effectuer un filtrage anti-dispersion d'un signal basé sur le signal d'excitation de bande basse codé. Selon le procédé de l'invention, le signal d'excitation de bande haute est basé sur le signal de spectre étendu, et le signal d'excitation de bande haute est basé sur un résultat du filtrage anti-dispersion.

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