Microphone and voice activity detection (vad) configurations...

G - Physics – 10 – L

Patent

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Details

G10L 11/02 (2006.01) G10L 11/06 (2006.01) G10L 21/02 (2006.01) H04R 1/40 (2006.01) H04R 1/46 (2006.01)

Patent

CA 2479758

Communication systems are described, including both portable handset and headset devices, which use a number of microphone configurations to receive acoustic signals of an environment. The microphone configurations include, for example, a two-microphone array including two unidirectional microphones, and a two-microphone array including one unidirectional microphone and one omnidirectional microphone. The communication systems also include Voice Activity Detection (VAD) devices to provide information of human voicing activity. Components of the communications systems receive the acoustic signals and voice activity signals and, in response, automatically generate control signals from data of the voice activity signals. Components of the communication systems use the control signals to automatically select a denoising method appropriate to data of frequency subbands of the acoustic signals. The selected denoising method is applied to the acoustic signals to generate denoised acoustic signals when the acoustic signal includes speech (101) and noise (102).

Cette invention concerne des systèmes de communication, dont des dispositifs portables combinés ou à casque d'écoute, faisant intervenir un certain nombre de configurations de microphone pour la réception de signaux acoustiques. Ces configurations de microphone comprennent, par exemple, un ensemble à double microphone constitué par deux microphones unidirectionnels, et un ensemble à double microphone constitué par un microphone unidirectionnel et un microphone omnidirectionnel. Ces systèmes de communication comprennent également des dispositif s de détection d'activité vocale (VAD) renseignant sur une activité vocale humaine. Des composants des systèmes de communication reçoivent les signaux acoustiques et les signaux d'activité vocale et, en réponse, génèrent automatiquement des signaux de commande à partir des données des signaux d'activité vocale. D'autres composants des systèmes de communication utilisent les signaux de commande pour sélectionner automatiquement un procédé de débruitage approprié pour les données des sous-bandes de fréquence des signaux acoustiques. On applique le procédé de débruitage retenu aux signaux acoustiques pour produire des signaux acoustiques lorsque le signal acoustique comprend des paroles (101) et du bruit (102).

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