METHOD OF CALCULATING PARCOR COEFFICIENT, AND ITS DEVICE, ITS PROGRAM AND ITS RECORDING MEDIUM

摘要

PROBLEM TO BE SOLVED: To provide a method of calculating PARCOR coefficient in which a PARCOR coefficient is obtained, not from relation of minimizing an average output Pm, but from reference for minimizing absolute values of amplitudes of a forward prediction error and a backward prediction error. SOLUTION: A device of calculation PARCOR coefficient for obtaining the PARCOR coefficient by increasing sequence orders, comprises: a weighting coefficient creation section for creating a weighting coefficient which suppresses more, as the amplitudes of the forward prediction error and the backward prediction error become larger; an inner product calculation section which calculates an inner product value of a forward prediction sample and a backward prediction sample, and which multiplies the weighting coefficient by the inner product value; an energy calculation section for multiplying each of energy values of the forward prediction error sample and the backward prediction error sample, by the weighting coefficient; and a dividing section for calculating the PARCOR coefficient by dividing the inner product value by which the weighting coefficient is multiplied, by a mean value of the energy value by which the weighting coefficient is multiplied. COPYRIGHT: (C)2008,JPO&INPIT