Detecting voiced and unvoiced speech using both acoustic and...

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H04R 3/00 (2006.01) G10L 11/06 (2006.01) G10L 15/00 (2006.01) G10L 15/02 (2006.01) G10L 15/20 (2006.01) G10L 15/28 (2006.01) G10L 21/02 (2006.01)

Patent

CA 2448669

Systems and methods are provided for detecting voiced and unvoiced speech in acoustic signals having varying levels of background noise. The systems (Fig. 3) receive acoustic signals at two microphones (Mic 1, Mic 2), and generate difference parameters between the acoustic signals received at each of the two microphones (Mic 1, Mic 2). The difference parameters are representative of the relative difference in signal gain between portions of the receive acoustic signals. The systems identify information of the acoustic signals as unvoiced speech when the difference parameters exceed a first threshold, and identify information of the acoustic signals as voiced speech when the difference parameters exceed a second threshold. Further, embodiments of the systems include non-acoustic sensors (20) that receive physiological information to aid identifying voiced speech.

La présente invention concerne des systèmes et des procédés permettant de détecter des paroles voisées et non voisées dans des signaux acoustiques dont les niveaux de bruit de fond varient. Ces systèmes (fig. 3) reçoivent des signaux acoustiques au niveau de deux microphones (Mic 1, Mic 2), et génèrent des paramètres de différence entre les signaux acoustiques reçus au niveau de chacun des deux microphones (Mic 1, Mic 2). Ces paramètres de différence sont représentatifs de la différence relative du gain de signal entre des parties des signaux acoustiques reçus. Ces systèmes identifient des informations des signaux acoustiques comme de la parole non voisée lorsque les paramètres de différence dépassent un premier seuil, et ils identifient des informations des signaux acoustiques comme de la parole voisée lorsque les paramètres de différence dépassent un second seuil. D'autres modes de réalisation de ces systèmes comprennent des détecteurs (20) non acoustiques qui reçoivent des informations physiologiques destinées à aider à l'identification de la parole voisée.

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