| 摘要 |
<p>A lattice filter (201) determines a backward prediction error and a backward reflectance by using an input signal sequence. A tap coefficient calculating section (202) calculates a tap coefficient by using a reference signal and a backward prediction error signal sequence produced by the lattice filter. A tap coefficient converting section (203) defines a conversion matrix by using the backward reflectance determined by the lattice filter (201) and determines a tap coefficient applicable to a transversal filter by matrix operation using the tap coefficient determined by the tap coefficient calculating section (202) and the conversion matrix.</p> |
