Enhanced method for signal shaping in multi-channel audio...

H - Electricity – 04 – S

Patent

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H04S 1/00 (2006.01) H04S 3/00 (2006.01)

Patent

CA 2646961

A reconstructed output channel, reconstructed with a multi-channel reconstructor using at least one downmix channel derived by downmixing a plurality of original channels and using a parameter representation including additional information on a temporal fine structure of an original channel can be generated using a generator (32) for generating a direct signal component (42) and a diffuse signal component (44) based on the downmix channel (38) is used. Only the direct signal component (42) is modified (34) such that the temporal (40) fine structure of the reconstructed output channel is fitting a desired temporal fine structure, indicated by the additional information on the temporal fine structure transmitted.

Selon la présente invention, il est possible de générer un canal de sortie reconstruit, reconstruit à l'aide d'un reconstructeur multicanal utilisant au moins un canal de mixage réducteur ("downmix") provenant du mixage réducteur d'une multitude de canaux d'origine et mettant en AEuvre une représentation paramétrique incluant des données supplémentaires concernant la structure temporelle fine d'un canal d'origine, ceci en utilisant un générateur (32) permettant de générer une composante (42) directe de signal et en utilisant également une composante (44) diffuse de signal basée sur le canal (38) de mixage réducteur. Seule la composante (42) directe de signal est modifiée (34), de sorte que la structure temporelle fine (40) du canal de sortie reconstruit corresponde à une structure temporelle fine souhaitée, indiquée par les données supplémentaires concernant la structure temporelle fine transmise.

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