A voice communication device, signal processing device and...

H - Electricity – 04 – M

Patent

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H04M 1/00 (2006.01)

Patent

CA 2696941

Signal processing device comprising: a signal analyser (7) for analysing a received signal into the subband domain; a first signal path (10) and a second signal path (11 ), the first signal path (10) being decoupled from the second signal path (11 ), whereby the first signal path (10) and the second signal path (11 ) are arranged to pass the received signal; only the first signal path (10) includes automatic gain control (3), the first signal path (10) further includes one or more speech metric functions (4, 5, 6) to determine estimated gain functions therein, the signal in the first signal path being passed from the automatic gain control (3) to the one or more speech metric functions (4, 5, 6) to enable determination of the estimated gain functions, the estimated gain functions determined by the one or more speech metric functions being combined to generate an overall gain function which is applied (9) to the signal (14) in the second signal path (11 ) to generate an enhanced signal; and a signal synthesiser (8) for synthesising the enhanced signal (12) into a fullband representation.

L'invention concerne un dispositif de traitement de signal comprenant : un analyseur de signal (7) pour analyser un signal reçu dans le domaine de sous-bande; un premier trajet de signal (10) et un second trajet de signal (11), le premier trajet de signal (10) étant découplé du second trajet de signal (11), le premier trajet de signal (10) et le second trajet de signal (11) étant agencés pour le passage du signal reçu; seul le premier trajet de signal (10) comporte une commande automatique de gain (3) ainsi qu'une ou plusieurs fonctions de métrique de parole (4, 5, 6) pour déterminer des fonctions de gain estimées dans celles-ci, le signal dans le premier trajet de signal étant transmis de la commande automatique de gain (3) à la ou aux fonctions de métrique de parole (4, 5, 6) pour permettre une détermination des fonctions de gain estimées, les fonctions de gain estimées déterminées par la ou les fonctions de métrique de parole étant combinées pour générer une fonction de gain globale appliquée (9) au signal (14) dans le second trajet de signal (11) pour générer un signal amélioré; et un dispositif de synthèse de signal (8) pour synthétiser le signal amélioré (12) dans une représentation en bande complète.

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