Upmixer, method and computer program for upmixing a downmix...

Details Upmixer, method and computer program for upmixing a downmix... Upmixer, method and computer program for upmixing a downmix...

G - Physics

10

L

G10L 19/00 (2006.01)

Patent

CA 2750451

An upmixer for upmixing a downmix audio signal into an upmixed audio signal describing one or more upmixed audio channels comprises a parameter applier configured to apply upmixing parameters to upmix the downmix audio signal in order to obtain the upmixed audio signal. The parameter applier is configured to apply a phase shift to the downmix audio signal to obtain a phase-shifted version of the downmix audio signal, while leaving a decorrelated signal unmodified by the phase shift. The parameter applier is further configured to combine the phase-shifted version of the downmix audio signal with the decorrelated signal to obtain the upmixed audio signal.

L'invention porte sur un mixeur multicanal pour effectuer un mixage multicanal d'un signal audio de mixage réduit (mono ou stéréo) en un signal audio multicanal décrivant un ou plusieurs canaux audio mixés multicanal, lequel mixeur multicanal comporte un applicateur de paramètres configuré pour appliquer des paramètres de mixage multicanal pour effectuer un mixage multicanal du signal audio de mixage réduit afin d'obtenir le signal audio mixé multicanal. L'applicateur de paramètres est configuré pour appliquer un déphasage au signal audio de mixage réduit pour obtenir une version déphasée du signal audio de mixage réduit, tout en laissant un signal non corrélé non modifié par le déphasage. L'applicateur de paramètres est en outre configuré pour combiner la version déphasée du signal audio de mixage réduit avec le signal non corrélé pour obtenir le signal audio mixé multicanal.

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