H - Electricity – 03 – H
Patent
H - Electricity
03
H
H03H 17/02 (2006.01) G10L 19/02 (2006.01)
Patent
CA 2496665
The present invention proposes a new method for improving the performance of a real-valued filterbank based spectral envelope adjuster. By adaptively locking the gain values for adjacent channels dependent on the sign of the channels, as defined in the application, reduced aliasing is achieved. Furthermore, the grouping of the channels during gain-calculation, gives an improved energy estimate of the real valued subband signals in the filterbank.
L'invention concerne un nouveau procédé permettant d'améliorer la performance d'un dispositif de réglage d'enveloppe spectrale basé sur des bancs de filtres à valeur réelle. Afin de réduire le repliement, on verrouille de façon adaptative les valeurs de gain pour les voies adjacentes en fonction du signe des voies, tel qu'il est défini dans le descriptif. De plus, le regroupement des voies pendant le calcul du gain améliore l'estimation en énergie des signaux de sous-bande à valeur réelle du banc de filtres.
Kjoerling Kristofer
Villemoes Lars
Coding Technologies Ab
Dolby International Ab
Mccarthy Tetrault Llp
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