Apparatus and method for encoding/decoding signal

Details Apparatus and method for encoding/decoding signal Apparatus and method for encoding/decoding signal

G - Physics

10

L

G10L 19/00 (2006.01)

Patent

CA 2637722

An encoding method and apparatus and a decoding method and apparatus are provided. The decoding method includes extracting a three-dimensional (3D) down-mix signal and spatial information from an input bitstream, removing 3D effects from the 3D down-mix signal by performing a 3D rendering operation on the 3D down-mix signal, and generating a multi-channel signal using the spatial information and a down-mix signal obtained by the removal. Accordingly, it is possible to efficiently encode multi-channel signals with 3D effects and to adaptively restore and reproduce audio signals with optimum sound quality according to the characteristics of a reproduction environment.

La présente invention concerne un procédé et un appareil de codage et un procédé et un appareil de décodage. Le procédé de décodage consiste à extraire un signal de mélange-abaissement en trois dimensions (3D) et une information spatiale d'un flux de bits d'entrée, à retirer des effets 3D du signal de mélange-abaissement en effectuant une opération de rendu 3D sur ce signal de mélange-abaissement 3D et à générer un signal multicanal au moyen de l'information spatiale et d'un signal de mélange-abaissement obtenu par ce retrait. Par conséquent, il est possible de coder efficacement des signaux multicanaux avec des effets 3D et de restaurer et reproduire de manière adaptative des signaux audio avec une qualité de son optimale suivant des caractéristiques d'un environnement de reproduction.

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