Double-talk and path change detection using a matrix of...

Details Double-talk and path change detection using a matrix of... Double-talk and path change detection using a matrix of...

H - Electricity

04

B

H04B 3/23 (2006.01)

Patent

CA 2402511

A process is described which generates matrix coefficients using zero-lag auto and cross-correlations from signals commonly found in echo canceller. Double- talk and path changes are then detected using matrix operations such as determinants, eigendecompositions, or singular value decompositions (SVDs). In a preferred embodiment, the determinant of the correlation-based matrix is compared against predetermined threshold values.

L'invention concerne un procédé permettant de générer des coefficients matriciels par autocorrélation de décalage nul et corrélation croisée de signaux couramment trouvés dans un annuleur d'écho. Ce procédé permet ensuite de détecter une émission simultanée de paroles et un changement de voie à l'aide d'opérations matricielles, telles que des déterminants, des décompositions propres ou des décompositions par valeur singulière (SVD). Dans un mode de réalisation préféré, le déterminant de la matrice associées à la corrélation est comparé à des valeurs limites prédéterminées.

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