Systems, methods, and apparatus for wideband speech coding

Details Systems, methods, and apparatus for wideband speech coding Systems, methods, and apparatus for wideband speech coding

G - Physics

10

L

G10L 21/02 (2006.01) G10L 19/08 (2006.01)

Patent

CA 2603255

A wideband speech encoder according to one embodiment includes a narrowband encoder and a highband encoder. The narrowband encoder is configured to encode a narrowband portion of a wideband speech signal into a set of filter parameters and a corresponding encoded excitation signal. The highband encoder is configured to encode, according to a highband excitation signal, a highband portion of the wideband speech signal into a set of filter parameters. The highband encoder is configured to generate the highband excitation signal by applying a nonlinear function to a signal based on the encoded narrowband excitation signal to generate a spectrally extended signal.

L'invention concerne un codeur de la parole à bande large, qui comprend, selon un premier mode de réalisation, un codeur à bande étroite et un codeur à bande haute. Le codeur à bande étroite est configuré de manière à coder une section de bande étroite d'un signal vocal à bande large, en un jeu de paramètres de filtrage et un signal d'excitation codé correspondant. Le codeur à bande haute est configuré de sorte à coder, selon un signal d'excitation à bande haute, une section de bande haute du signal vocal à bande large, en un jeu de paramètres de filtrage. Le codeur à bande haute est configuré pour produire un signal d'excitation à bande haute, par application d'une fonction non linéaire à un signal, sur la base du signal d'excitation à bande étroite codé, afin de produire un signal à spectre étendu.

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