G - Physics – 10 – L
Patent
G - Physics
10
L
G10L 21/02 (2006.01) G10L 11/00 (2006.01) G10L 19/02 (2006.01)
Patent
CA 2401672
A communication system for processing a communication signal derived from speech and noise enhances the quality of the communication signal by providing a filter (50) dividing the communication signal into a plurality of frequency band signals representing the communication signal in a plurality of frequency bands. A calculator generates a likelihood signal having values representing the likelihoods that the communication signal is derived from speech (70). The calculator assigns weighting values (120) to the frequency band signals in response to the values of the likelihood signal. The calculator also alters the frequency band signals in response to the weighting values to generate weighted frequency band signals, and combines (160) the weighted frequency bands signals to generate a communication signal with enhanced quality (170).
Selon l'invention, un système de communication servant à traiter un signal de communication provenant de la parole et du bruit améliore la qualité du signal de communication en fournissant un filtre (50) qui divise le signal de communication en plusieurs signaux de bandes de fréquence représentant le signal de communication dans plusieurs bandes de fréquence. Un calculateur génère un signal de vraisemblance présentant des valeurs qui représentent les vraisemblances selon lesquelles le signal de communication est issu de la parole (70). Le calculateur attribue des valeurs de pondération (120) aux signaux de bandes de fréquence en réponse aux valeurs du signal de vraisemblance. Le calculateur modifie également les signaux de bandes de fréquence en réponse aux valeurs de pondération afin de générer des signaux de bandes de fréquence pondérés, et combine (160) les signaux de bandes de fréquence pondérés pour générer un signal de communication de qualité améliorée (170).
Chandran Ravi
Dunne Bruce E.
Marchok Daniel J.
Borden Ladner Gervais Llp
Tellabs Operations Inc.
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