Methods for concealing errors in an audio data stream

H - Electricity – 04 – N

Patent

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Details

H04N 1/00 (2006.01) G10L 19/00 (2006.01) G11B 20/18 (2006.01) G11B 20/00 (2006.01) H04H 1/00 (2006.01)

Patent

CA 2276202

In a method for concealing errors in an audio data stream the occurrence of an error is detected in the audio data stream, audio data prior to the occurrence of the fault being intact audio data. Thereafter a spectral energy of a subgroup of the intact audio data is calculated. After forming a pattern for substitute data on the basis of the spectral energy calculated for the subgroup of the intact audio data, substitute data for erroneous or missing audio data which correspond to the subgroup are created on the basis of the pattern.

L'invention concerne un procédé de masquage des erreurs dans un courant de données audio, selon lequel l'apparition d'une erreur est détectée dans le courant de données audio, les données audio étant des données audio intactes avant l'apparition de l'erreur. Ensuite, une énergie spectrale d'un sous-groupe des données audio intactes est calculée. Après formation d'un modèle pour les données de remplacement, effectuée sur la base de l'énergie spectrale calculée pour le sous-groupe des données audio intactes, des données de remplacement sont produites sur la base du modèle pour remplacer des données audio erronées ou absentes, données de remplacement qui correspondent au sous-groupe.

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