Patent ID: 7062041

Claim:
Device for multichannel acoustic echo compensation for acoustic interfaces, which includes the following: a multichannel audio signal processing unit ( 1 ); a number, D, audio signal channels (LK 1 , . . . , LKD) going out from the multichannel audio signal processing unit ( 1 ); wherein each audio signal channel has a respective audio signal preprocessing unit (V 1 , . . . , VD) assigned to the respective audio channel; wherein at least one loudspeaker (L 1 , . . . , LD) is assigned to each respective audio signal channel; wherein one branch line (A 1 , . . . , AD) is branched off to a D-channel adaptive filter ( 2 ) from each audio signal channel between the particular assigned preprocessing unit (Vi, . . . , VD) and the particular assigned at least one loudspeaker (L 1 , . . . , LD); a microphone (M) connected to the adaptive filter ( 2 ); a microphone channel (MK) leading back from the adaptive filter to the multichannel audio signal processing unit ( 1 ); a channel combination device; wherein a preprocessing unit (V 1 , . . . , VD) is assigned to each audio channel; and wherein the channel-combination device ( 5 ) is arranged between the preprocessing units (V 1 , . . . , VD) and the loudspeakers such that in the channel-combination device ( 5 ), a number, C, of loudspeaker channels can be combined with fewer than the number, D, of audio signal channels.