EP 2490218 B1 20190925 - Method for interference suppression
Title (en)
Method for interference suppression
Title (de)
Verfahren zur Interferenzunterdrückung
Title (fr)
Procédé pour supprimer l'interférence
Publication
Application
Priority
EP 11155047 A 20110218
Abstract (en)
[origin: EP2490218A1] In a method for interference suppression for a communication system as an indoor communication system or a handsfree telephony system or an automatic speech recognition system, at least one loudspeaker and at least one microphone are provided, particularly in a vehicle. A test signal is sent for determining system characteristics on the base of the test signal received by a microphone. The interference may be an ICC-system feedback component or the feedback signal of the audio component. The system characteristics detected by the test signal are used to determine interference model parameters in the form of frequency dependent coupling factors and frequency dependent decay factors and frequency dependent delay factors. Then, an estimated interference signal is formed on the base of the sub-band coupling factor times the magnitude square of a sub-band delayed loudspeaker signal plus a last interference signal level times a sub-band decay. The estimated interference signal is used to suppress the interference signal accordingly.
IPC 8 full level
G10L 21/0208 (2013.01)
CPC (source: EP)
G10L 21/0208 (2013.01)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
DOCDB simple family (application)
EP 11155047 A 20110218