Acoustic voice activity detection (avad) for electronic systems

H - Electricity – 04 – R

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H04R 3/04 (2006.01)

Patent

CA 2741652

Acoustic Voice Activity Detection (AVAD) methods and systems are described. The AVAD methods and systems, including corresponding algorithms or programs, use microphones to generate virtual directional microphones which have very similar noise responses and very dissimilar speech responses. The ratio of the energies of the virtual microphones is then calculated over a given window size and the ratio can then be used with a variety of methods to generate a VAD signal. The virtual microphones can be constructed using either an adaptive or a fixed filter.

Linvention a pour objet des procédés et des systèmes de détection acoustique dactivité vocale (AVAD). Ces procédés et ces systèmes AVAD, notamment les algorithmes ou programmes correspondants, utilisent des microphones pour générer des microphones directionnels virtuels qui présentent des réponses de bruit très semblables et des réponses de paroles très différentes. Le rapport des énergies des microphones virtuels est ensuite calculé sur une taille de fenêtre donnée et le rapport peut alors être utilisé avec une variété de procédés pour générer un signal VAD. Les microphones virtuels peuvent être construits en utilisant un filtre adaptatif ou un filtre fixe.

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