Systems, methods, and apparatus for highband time warping

Details Systems, methods, and apparatus for highband time warping Systems, methods, and apparatus for highband time warping

G - Physics

10

L

G10L 21/04 (2006.01) G10L 21/02 (2006.01)

Patent

CA 2603231

In one embodiment, a method of signal processing includes encoding a low- frequency portion of a speech signal into at least an encoded narrowband excitation signal and a plurality of narrowband filter parameters; and generating a highband excitation signal based on a narrowband excitation signal. The narrowband excitation signal is based on the encoded narrowband excitation signal. The method also includes encoding a high-frequency portion of the speech signal into at least a plurality of highband filter parameters according to at least the highband excitation signal. The encoded narrowband excitation signal includes a time warping, and the method includes applying a time shift to the high-frequency portion based on information related to the time warping.

Dans un mode de réalisation, l'invention porte sur un procédé de traitement des signaux qui consiste à coder une partie basse fréquence d'un signal de parole en au moins un signal d'excitation de bande étroite codé et en une pluralité de paramètres de filtre de bande étroite, et à produire un signal d'excitation de bande haute sur la base d'un signal d'excitation de bande étroite. Le signal d'excitation de bande étroite est basé sur le signal d'excitation de bande étroite codé. Le procédé consiste également à coder une partie haute fréquence du signal de parole en au moins une pluralité de paramètres de filtre de bande haute en fonction du signal d'excitation de bande haute au moins. Le signal d'excitation de bande étroite codé comporte un alignement temporel et, selon le procédé de l'invention, on applique un décalage temporel à la partie haute fréquence sur la base d'informations liées à l'alignement temporel.

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