| 摘要 |
In a filter coefficient calculation device, a gain correction characteristic calculation section calculates impulse responses corresponding to a linear-phase filter having an inverse characteristic of a gain characteristic of a reproduction system, and calculates, a frequency characteristic of continuous-time impulse responses that include a peak value, the continuous-time impulse responses being impulse responses, clipped from the calculated impulse responses, whose number is identical to the preset number of filter taps. A phase correction characteristic calculation section calculates a phase correction characteristic by normalizing, a gain characteristic of the inverse characteristic, and a filter coefficient calculation section calculates, as filter coefficients of the reproduction characteristic correction filter, filter coefficients of a filter having a synthetic correction characteristic obtained by combining the gain correction characteristic with the phase correction characteristic. |
