Apparatus and method for combining multiple parametrically...

G - Physics – 10 – L

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G10L 19/00 (2006.01) H04N 7/15 (2006.01)

Patent

CA 2656867

According to the present invention, multiple parametrically encoded audio signals can be efficiently combined using an audio signal generator (100), which generates an audio output signal (120) by combining the down-mix channels (110a, 112a) and the associated parameters (110b, 112b) of the audio signals directly within the parameter domain, i.e. without reconstructing or decoding the individual input audio signals prior to the generation of the audio output signal (120). This is achieved by direct mixing of the associated down-mix channels (110a, 112a) of the individual input signals. It is one key feature of the present invention that the combination of the down-mix channels (110a, 112a) is achieved by simple, computationally inexpensive arithmetic operations.

Selon la présente invention, de multiples signaux audio à codage paramétrique peuvent être combinés efficacement à l'aide d'un générateur de signal audio (100), qui génère un signal de sortie audio (120) en combinant les canaux mélangeurs abaisseurs (110a, 112a) et les paramètres associés (110b, 112b) des signaux audio directement dans le domaine paramétrique, c'est-à-dire sans reconstruire ni décoder les signaux audio d'entrée individuels avant la génération du signal de sortie audio (120). Ceci est réalisé en mélangeant directement les canaux mélangeurs abaisseurs associés (110a, 112a) des signaux d'entrée individuels. Une caractéristique essentielle de la présente invention est que la combinaison des canaux mélangeurs abaisseurs (110a, 112a) est obtenue par des opérations arithmétiques simples et peu coûteuses en termes de calcul.

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