Separation of target acoustic signals in a multi-transducer...

G - Physics – 10 – L

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G10L 21/02 (2006.01)

Patent

CA 2574713

The present invention provides a process (26) for separating a good quality information signal from a noisy acoustic environment (12). The separation process uses a set of a least two spaced-apart transducers (19, 20) to capture noise (13, 15) and information components (14). The transducer signals, which have both a noise and information component, are received into a separation process. The separation process generates one channel that is substantially only noise, and another channel that is a combination of noise and information. An identification process (30) is used to identify which channel has the information component. The noise signal is then used to set process characteristics that are applied to the combination signal to efficiently reduce or eliminate the noise component. In this way, the noise is effectively removed from the combination signal to generate a good qualify information signal. The information signal may be, for example, a speech signal, a seismic signal, a sonar signal, or other acoustic signal.

L'invention concerne un procédé de séparation d'un signal d'information de bonne qualité d'un environnement acoustique bruyant. Ce procédé de séparation fait intervenir un ensemble d'au moins deux transducteurs pour saisir les composantes de bruit et d'information. Les signaux de transducteurs, qui comportent à la fois une composante de bruit et une composante d'information, sont intégrés dans un procédé de séparation. Le procédé de séparation produit un premier canal qui ne contient sensiblement que la composante de bruit, et un autre canal qui combine la composante de bruit et la composante d'information. Un procédé d'identification est utilisé pour identifier lequel des canaux comporte la composante d'information. Le signal de bruit est ensuite utilisé pour établir les caractéristiques de processus qui sont appliquées au signal de combinaison pour réduire ou supprimer de manière efficace la composante de bruit. Le bruit est ainsi efficacement supprimé du signal de combinaison, ce qui permet d'obtenir un signal d'information de bonne qualité. Le signal d'information peut être, par exemple, un signal de parole, un signal sismique, un signal sonar, ou un autre signal acoustique.

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