Patent ID: 9690751
Date: 2017-06-27
CPC Classifications: G06F,H03H,H04B,H04L

Claim:
1. A digital processing apparatus comprising: a first circuit that Fourier-transforms a time domain digital signal and generates N frequency domain signals, N being a natural number; a filter that processes the frequency domain signals in a frequency domain using N first factors; a second circuit that transforms the N frequency domain signals processed by the filter into a time domain digital signal; first calculator that calculates N first A factors using m second factors where N>m and m is a natural number; a second calculator including a divider that calculates respective ratios of N third factors and the N first A factors and a factor variable calculator that calculates N first B factors each varying in a stepwise fashion from 1 to corresponding ratios; a multiplier that calculates the N first factors by multiplying the first A factor and the first B factor together; and a controller that controls the first calculator and the second calculator in such a way that the second calculator calculates the first B factors based on the third factors after causing only the first calculator to operate with the first B factors being set to 1.