A method and an apparatus for processing a signal

G - Physics – 10 – L

Patent

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G10L 19/00 (2006.01) G11B 20/10 (2006.01) H03M 7/30 (2006.01) H04N 7/24 (2006.01)

Patent

CA 2705968

A method of processing a signal is disclosed. The present invention includes receiving extension information and at least one downmix signal of a first downmix signal decoded by a audio coding scheme and a second downmix signal decoded by a speech coding scheme; determining an extension base signal corresponding to a partial region of the downmix signal based on the extension information; and generating an extended downmix signal having a bandwidth extended by reconstructing a high frequency region signal using the extension base signal and the extension information. According to a signal processing method and apparatus of the present invention, signal corresponding to a partial frequency region of the downmix signal is used as the extension base signal. Therefore, the high frequency region of the downmix signal is reconstructed by using the extension base signal having variable bandwidth.

L'invention décrit un procédé de traitement d'un signal. Le procédé consiste à recevoir des informations d'extension et au moins un signal de mélange abaissé d'un premier signal de mélange abaissé décodé par un schéma de codage audio et un second signal de mélange abaissé décodé par un schéma de codage de parole; à déterminer un signal de base d'extension correspondant à une région partielle du signal de mélange abaissé selon les informations d'extension; et à générer un signal de mélange abaissé étendu munie d'une largeur de bande étendue par reconstruction d'un signal de région haute fréquence au moyen du signal de base d'extension et des informations d'extension. Selon un procédé et un appareil de traitement de signal de la présente invention, un signal correspondant à une région de fréquence partielle du signal de mélange abaissé est utilisé en tant que signal de base d'extension. En conséquence, la région haute fréquence du signal de mélange abaissé est reconstruite par utilisation du signal de base d'extension à largeur de bande variable.

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