G - Physics – 10 – L
Patent
G - Physics
10
L
G10L 21/02 (2006.01)
Patent
CA 2475460
An audio signal is conveyed more efficiently by transmitting or recording a baseband of the signal with an estimated spectral envelope and a noise- blending parameter derived from a measure of the signal~s noise-like quality. The signal is reconstructed by translating spectral components of the baseband signal to frequencies outside the baseband, adjusting phase of the regenerated components to maintain phase coherency, adjusting spectral shape according to the estimated spectral envelope, and adding noise according to the noise- blending parameter. Preferably, the transmitted or recorded signal also includes an estimated temporal envelope that is used to adjust the temporal shape of the reconstructed signal.
Un signal audio est transporté plus efficacement par la transmission ou l'enregistrement d'une bande de base du signal avec une enveloppe spectrale estimée et un paramètre de mixage de bruits dérivé d'une mesure de la qualité de bruit du signal. Le signal est reconstitué par la transposition des composantes spectrales du signal de bande de base à des fréquences hors bande de base, l'ajustement des composantes régénérées pour maintenir la cohérence de phase, l'ajustement de la forme spectrale selon l'enveloppe spectrale estimée, et l'ajout de bruit selon le paramètre de mixage de bruit. De préférence, le signal transmis ou enregistré comprend également une enveloppe temporelle estimée qui est utilisée pour l'ajustement de la forme temporelle du signal reconstitué.
Truman Michael Mead
Vinton Mark Stuart
Dolby Laboratories Licensing Corporation
Smart & Biggar
LandOfFree
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