G - Physics – 10 – L
Patent
G - Physics
10
L
G10L 19/12 (2006.01) G10L 21/02 (2006.01) H04W 88/02 (2009.01)
Patent
CA 2603187
In one embodiment, a method of generating a highband excitation signal includes harmonically extending the spectrum of a signal that is based on a lowband excitation signal; calculating a time-domain envelope of a signal that is based on the lowband excitation signal; and modulating a noise signal according to the time-domain envelope. The method also includes combining (A) a harmonically extended signal based on a result of the harmonically extending and (B) a modulated noise signal based on a result of the modulating. In this method, the highband excitation signal is based on a result of the combining.
Dans un mode de réalisation, l'invention concerne un procédé de génération d'un signal d'excitation en bande haute qui comporte les étapes consistant à: augmenter harmoniquement le spectre d'un signal basé sur un signal d'excitation en bande basse; calculer l'enveloppe du domaine temporel d'un signal basé sur le signal d'excitation en bande basse; moduler le signal de bruit selon l'enveloppe du domaine temporel; et combiner (A) le signal harmoniquement augmenté résultant de l'augmentation harmonique et (B) le signal de bruit modulé résultant de la modulation. Dans le procédé, le signal d'excitation en bande haute résulte de cette combinaison.
Kandhadai Ananthapadmanabhan A.
Vos Koen Bernard
Qualcomm Incorporated
Smart & Biggar
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