Coefficient updating method for an adaptive filter

Details Coefficient updating method for an adaptive filter Coefficient updating method for an adaptive filter

1995-01-25

1997-09-16

Mai, Tan V.

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G06F 1710

Patent

active

056687478

ABSTRACT:
A coefficient updating method stops updating filter coefficients for a plurality of adaptive filters when a convergence condition is achieved. Active noise control within a system simulates an original noise signal with a simulated noise signal which is equal and opposite to the original noise signal. To detect feedback in such a system, a reference signal or "white noise" is generated by a speaker, transmitted through the system and received by a microphone. Coefficients of multiple filters such as an anti-feedback filter, a C filter, and a noise control filter are then updated to minimize adverse parameters such as original noise and feedback. Coefficient updating of the adaptive filters is stopped when a minimum average value is reached.

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patent: 5426597 (1995-06-01), Herchen, Jr. et al.
patent: 5428562 (1995-06-01), Gay
Widrow et al., Adaptive Signal Processing, Prentic Hall, Inc., 1985, ISBN No. 0-13-004029, pp. 20-21 & 288-301.

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