Echo processing devices for single-channel or multichannel...

Details Echo processing devices for single-channel or multichannel... Echo processing devices for single-channel or multichannel...

2008-07-22

2008-07-22

Singh, Ramnandan (Department: 2614)

Telephonic communications

Echo cancellation or suppression

C379S406020

Reexamination Certificate

active

10519744

ABSTRACT:
An echo processing technique for attenuating echo components of a direct signal X1nin a return signal Y2n. A receive gain Grnand a send gain Genare calculated. The receive gain Grnis applied to the direct signal and an input signal X2nis produced and emitted into an echo generator system. The send gain Genis applied to an output signal Y1nfrom the echo generator system and the return signal Y2nis produced. A coupling variable COR is calculated which is characteristic of the acoustic coupling between the direct signal X1nor the input signal X2nand the output signal Y1n. The receive gain Grnand the send gain Genare calculated on the basis of the coupling variable.

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patent: 2 738 695 (1997-03-01), None
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