Audio encoder

Details Audio encoder Audio encoder

H - Electricity

04

B

H04B 1/66 (2006.01) G10L 19/02 (2006.01)

Patent

CA 2296006

The invention concerns a audio encoder whereof the first coding stage (6) includes an coding hub (8) receiving a base audio signal (S0) and generating parameters (QS0) coding the base signal and an error signal (E0). A filter bank (9) breaks down the error signals into sub-bands. A second coding stage includes modules (CE0m) respectively coding the error signal sub-band components (E0m), generating parameters (QE0) coding said components. A multiplexer (5) receives the base signal coding parameters and the error signal sub-band components coding parameters, and forms an binary output flow (.PHI.).

Un premier étage de codage (6) inclut un noyau codeur (8) recevant un signal audio de base (S0) et produisant d'une part des paramètres (QS0) de codage du signal de base et d'autre part un signal d'erreur (E0). Un banc de filtres (9) décompose en sous-bandes le signal d'erreur. Un second étage de codage inclut des modules respectifs (CE0m) de codage des composantes en sous-bandes (E0m) du signal d'erreur, produisant des paramètres (QE0n) de codage desdites composantes. Un multiplexeur (5) reçoit les paramètres de codage du signal de base et les paramètres de codage des composantes en sous-bandes du signal d'erreur, et forme un flux binaire de sortie (.PHI.).

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