| 摘要 |
At first, adaptive filters 601, 602, . . . , 60K are operated by the initial numbers of taps memorized in the memory circuit 25, secondly operated by the approximate number of taps calculated in the calculation circuit of approximate numbers of taps 20 using respective coefficient values, the numbers of taps and the input signal obtained from adaptive filters 601, 602, . . . , 60K, and subsequently operated by the optimum number of taps calculated in the tap assignment control circuit 10 using respective coefficient values, the numbers of taps, the input signals and the reference signals obtained from adaptive filters 601, 602, . . . , 60K.
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