Noise suppression

G - Physics – 10 – L

Patent

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G10L 21/02 (2006.01)

Patent

CA 2384963

A method of noise suppression to suppress noise in a signal containing background noise (314) in a communications path between a cellular communications network and a mobile terminal. The method comprises the steps of: estimating and up-dating a spectrum of the background noise (332, 334); using the background noise spectrum to suppress noise in the signal; generating an indication to indicate the operation of at least one of a discontinuous transmission unit (DTX) and a bad frame handling unit (BFI); and freezing estimating and up-dating of the spectrum of the background noise when the indication is present.

L'invention concerne un procédé de suppression du bruit permettant de supprimer le bruit dans un signal contenant un bruit de fond (314) dans une voie de communication entre un réseau de communications cellulaire et un terminal mobile. Le procédé consiste à estimer et à mettre à jour un spectre du bruit de fond (332, 334), à utiliser ce spectre afin de supprimer le bruit du signal, à générer une indication du fonctionnement d'au moins une unité de transmission discontinue (DTX) ou d'une unité de traitement de mauvaises trames (BFI), et à bloquer l'estimation et la mise à jour du spectre du bruit de fond lorsque l'indication est présente.

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