A method and an apparatus of decoding an audio signal

G - Physics – 10 – L

Patent

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G10L 19/00 (2006.01)

Patent

CA 2699004

A method of decoding an audio signal is disclosed, The present invention includes the steps of receiving the audio signal having a plurality of channel signals including an ambient component signal and a source component signal, extracting the ambient component signal and the source component signal of each of the channels based on correlation between the channel signals, modifying the ambient component signal using surround effect information, and generating the audio signal including a plurality of channels using the modified ambient component signal and the source component signal. Accordingly, in an apparatus for decoding an audio signal and method thereof according to the present invention, an ambient component signal is extracted and modified based on correlation and the modified ambient and source component signals are outputted using different signal output units, respectively. Therefore, the present invention enhances a stereo effect of the audio signal. And, a signal output unit for outputting a ambient component signal is arranged to have an output direction different from that of another signal output unit for outputting a source component signal, whereby a listener can be provided with an audio signal of which ambient sound is enhanced.

Procédé de décodage d'un signal audio consistant: à recevoir le signal audio constitué d'une pluralité de signaux de canal dont un signal à composante ambiante et un signal à composante source; à extraire le signal à composante ambiante et le signal à composante source de chacun des canaux sur la base d'une corrélation entre les signaux de canal; à modifier le signal à composante ambiante au moyen d'informations sur l'effet surround; et à générer le signal audio comprenant une pluralité de canaux au moyen des signaux à composante ambiante et composante source modifiés. En conséquence, dans un dispositif de décodage de signal audio et selon le procédé correspondant, un signal à composante ambiante est extrait et modifié en fonction d'une corrélation et les signaux à composante ambiant et à composante source modifiés sont émis par des unités de sortie de signal différentes, respectivement. Ainsi, la présente invention a pour effet d'accentuer l'effet stéréo du signal audio. Par ailleurs, une unité d'émission de signal est agencée de manière à présenter une direction de sortie différente de celle d'une autre unité de sorte de signal pour la production d'un signal à composante source, si bien que l'auditeur peut recevoir un signal audio avec amélioration du son ambiant.

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