| 摘要 |
PROBLEM TO BE SOLVED: To provide a design method of digital filters capable of easily forming a frequency characteristic close to a setting value with very few effect of adjacent bands without the need for changing the characteristic of the conventional filter single unit, in the digital filter being applied to a graphic equalizer or the like and for forming a composited output frequency characteristic by using a plurality of filter single body units. SOLUTION: In the design method, deconvolution is carried out by using a desired target frequency characteristic formed by a plurality of the filter single body units and respective frequency characteristics of the filter single units, coefficients of each of the filter single body units are set by using respective frequency characteristic setting values of the filter single body units obtained by the deconvolution, and the composited output frequency characteristic is formed on the basis of the coefficients. COPYRIGHT: (C)2005,JPO&NCIPI |
