H - Electricity – 04 – M
Patent
H - Electricity
04
M
H04M 9/08 (2006.01)
Patent
CA 2356620
Adaptive gain control techniques provide correctly adjusted audio signal levels during the entirety of an Internet telephony conversation and are resilient to background noise and loudspeaker echo. Disclosed techniques can account for multiple near-end speakers, as well as changes in near-end environment. In an exemplary embodiment, an adaptive gain controller includes a gain control processor configured to adjust an analog gain for a microphone output signal based on measurements of the microphone output signal and on measurements of a loudspeaker input signal.
Des techniques de commande adaptative de gain permettent d'obtenir des niveaux de signaux correctement ajustés pendant toute la durée d'une conversation téléphonique Internet et sont résistants aux bruits de fond et aux échos de hauts-parleurs. Ces techniques permettent de multiples locuteurs de l'extrémité rapprochée comme des changements dans l'environnement de l'extrémité rapprochée. Dans un mode de réalisation, une commande adaptative de gain comprend un processeur de commande de gain conçu pour ajuster un gain analogue d'un signal de sortie de microphone basé sur des mesures du signal de sortie de microphone et sur des mesures d'un signal d'entrée de haut-parleur.
Eriksson Anders
Sorqvist Patrik
Sundqvist Jim
Svensson Tomas
Marks & Clerk
Telefonaktiebolaget Lm Ericsson
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