Telephone set with background noise suppression function

Details Telephone set with background noise suppression function Telephone set with background noise suppression function

H - Electricity

04

M

H04M 1/74 (2006.01) H04R 3/00 (2006.01) G10L 21/02 (2006.01) H04M 1/19 (2006.01)

Patent

CA 2138698

A telephone set is provided with a first microphone at the position close to a speaker and a signal including remaining noise is outputted from the first microphone. Background noise is outputted from a second microphone. A noise elimination circuit estimates background noise reaching the ear of a receiver based on the background noise signal, the signal including the remaining noise, and a received voice signal from a transmitter. Also, the noise elimination circuit subtracts the estimated background noise from the received voice signal to supply the resultant signal to the speaker.

Poste téléphonique doté d'un premier microphone qui est placé près d'un haut-parleur et transmet un signal comprenant un bruit résiduel. Le bruit de fond est transmis par un deuxième microphone. Un circuit d'élimination de bruit estime, en fonction du signal de bruit de fond, le bruit de fond audible par un auditeur, le signal comprenant le bruit résiduel et un signal vocal reçu d'un émetteur. En outre, le circuit d'élimination de bruit retranche du signal vocal reçu le bruit de fond estimé afin de transmettre au haut-parleur le signal résultant.

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