Device and method for carrying out multichannel acoustic...

Details Device and method for carrying out multichannel acoustic... Device and method for carrying out multichannel acoustic...

2006-06-13

2006-06-13

Harold, Jefferey F. (Department: 2646)

Telephonic communications

Echo cancellation or suppression

Using digital signal processing

C379S406080, C379S406040

Reexamination Certificate

active

07062041

ABSTRACT:
A multichannel full-duplex audio signal transmission system, comprising an adaptive filter (2) provided for multichannel acoustic echo cancellation. A channel combining device (5) is provided between the preprocessing units (V1, . . . VD) and loudspeakers (L1, . . . ,LD), in which several (C>D) loudspeakers can be connected to one and the same preprocessing unit and by means of which the remaining D-C preprocessing units can be separated from the loudspeakers (L1, . . , LD). The channel combining device permits an optimization of the convergence ratio of the adaptive adjustment of filter coefficients in said adaptive filter (2).

REFERENCES:
patent: 09-130306 (1997-05-01), None

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