System and method for distributed gain control for spectrum...

H - Electricity – 03 – H

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H03H 11/02 (2006.01) G10L 21/02 (2006.01) H03H 11/12 (2006.01) H04N 7/44 (2006.01) H04R 25/00 (2006.01) G10L 21/00 (2006.01)

Patent

CA 2492246

In accordance with an embodiment, the invention provides a spectral enhancement system that includes a plurality of distributed filters, a plurality of energy distribution units, and a weighted-averaging unit. At least one of the distributed filters receives a multi-frequency input signal. Each of the plurality of energy-detection units is coupled to an output of at least one filter and provides an energy-detection output signal. The weighted- averaging unit is coupled to each of the energy-detection units and provides a weighted-averaging signal to each of the filters responsive to the energy- detection output signals from each of the energy-detection units to implement distributed gain control. In an embodiment, the energy detection units are coupled to the outputs of the filters via a plurality of differentiator units, preferably double differentiation units.

L'invention porte dans l'une de ses exécutions sur un système d'amélioration spectrale comprenant plusieurs filtres répartis, plusieurs unités de détection d'énergie et une unité de calcul de moyennes pondérées. L'un au moins des filtres répartis reçoit un signal entrant à fréquences multiples. Chacune des unités de détection d'énergie est couplée à la sortie d'au moins un filtre et fournit un signal sortant de détection d'énergie. L'unité de calcul de moyennes pondérées, reliée à chacun des unités de détection d'énergie, fournit à chacun des filtres un signal de moyennes pondérées, en réponse au signal sortant de détection d'énergie de chacune des unités de détection d'énergie, afin de mettre en oeuvre la commande répartie de gain. Dans une exécution, les unités de détection d'énergie sont couplées aux sorties des filtres par l'intermédiaire de différentiateurs.

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