LINEAR PREDICTIVE COEFFICIENT INTERPOLATING DEVICE

摘要

PURPOSE:To provide a linear predictive coefficient interpolating device which can extremely reduce its calculation quantity even in a digital signal processor. CONSTITUTION:A linear predictive coefficient interpolating device is provided with a hyperbolic conversion part 61 which applies the hyperbolic conversion to a partial autocorrelation coefficient of a prescribed degree acquired from an input voice signal of a fixed time length, a linear interpolation part 62 which is connected to the part 61 and applies the linear interpolation to the hyperbolic conversion result of the part 61, and a hyperbolic reverse conversion part 63 which connected to the part 62 and applies the reverse conversion to the linear interpolation result of the part 62.