System and method for reducing uplink noise

G - Physics – 10 – L

Patent

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G10L 21/02 (2006.01) H04W 24/02 (2009.01) H04B 1/10 (2006.01)

Patent

CA 2611222

A system and method for reducing uplink noise in a mobile communications device, the system including: a noise estimator for estimating noise in proximity to the mobile communication device; an adjustable filter for receiving a signal from a microphone of the mobile communication device; an adjustable attenuation block for receiving a filtered signal from the adjustable filter; a controller configured to: monitor the estimated noise; and adjust the adjustable filter and adjustable attenuation block based on the estimated noise. In particular, the controller may be configured to adjust the adjustable filter by increasing the depth of the filtering for higher estimated noise levels and adjust the attenuation by increasing the attenuation for higher estimated noise levels.

Il s'agit d'un système et d'une méthode qui permettent de réduire le bruit de liaison montante dans un appareil de communications mobile. Le système comprend les éléments qui suivent. Un estimateur de bruit pour estimer le bruit aux alentours de l'appareil de communications mobile; un filtre réglable pour recevoir un signal du micro de l'appareil de communications mobile; un atténuateur réglable pour recevoir un signal filtré du filtre réglable; un contrôleur configuré pour contrôler le bruit estimé et pour régler le filtre réglable et l'atténuateur réglable, en fonction du bruit estimé. En particulier, le contrôleur peut être configuré pour régler le filtre réglable en augmentant la profondeur du filtrage pour l'obtention de niveaux de bruit estimés plus élevés et pour régler l'atténuation en augmentant l'atténuation pour obtenir des niveaux de bruit estimés plus élevés.

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