Individual channel shaping for bcc schemes and the like

Details Individual channel shaping for bcc schemes and the like Individual channel shaping for bcc schemes and the like

G - Physics

10

L

G10L 19/02 (2006.01) G10L 19/00 (2006.01)

Patent

CA 2582485

At an audio encoder, cue codes are generated for one or more audio channels, wherein an envelope cue code is generated by characterizing a temporal envelope in an audio channel. At an audio decoder, E transmitted audio channel(s) are decoded to generate C playback audio channels, where C>=Eo1. Received cue codes include an envelope cue code corresponding to a characterized temporal envelope of an audio channel corresponding to the transmitted channel(s). One or more transmitted channel(s) are upmixed to generate one or more upmixed channels. One or more playback channels are synthesized by applying the cue codes to the one or more upmixedchannels, wherein the envelope cue code is applied to an upmixed channel or a synthesized signal to adjust a temporal envelope of the synthesized signal based on the characterized temporal envelope such that the adjusted temporal envelope substantially matches the characterized temporal envelope.

dans un codeur audio, des codes repères sont générés pour un ou plusieurs canaux sonores, avec création d'un code repère d'enveloppe obtenu par caractérisation d'une enveloppe temporelle dans un canal sonore. On décode le ou les canaux sonores E pour former des canaux sonores de lecture C, tel que C>=Eo1. Les codes repères reçus incluent un code repère d'enveloppe correspondant à l'enveloppe temporelle caractérisée d'un canal sonore correspondant au/aux canaux transmis. Un ou plusieurs canaux transmis sont mélangés vers le haut pour générer un ou plusieurs canaux mélangés vers le haut. On synthétise un ou plusieurs canaux de lecture en appliquant des codes repères au/aux codes mélangés vers le haut, le code repère d'enveloppe étant appliqué à un canal mélangé vers le haut ou à un signal synthétisé en fonction de l'enveloppe temporelle caractérisée de sorte que l'enveloppe temporelle ajustée correspond sensiblement à l'enveloppe temporelle caractérisée.

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