Abstract
FP15-0209-00
ABSTRACT
The purpose of the present invention is to estimate, with a small
amount of computation, a linear prediction synthesis filter after
conversion of an internal sampling frequency. A linear prediction
5 coefficient conversion device is a device that converts first linear
prediction coefficients calculated at a first sampling frequency to second
linear prediction coefficients at a second sampling frequency different
from the first sampling frequency, which includes a means for
calculating, on the real axis of the unit circle, a power spectrum
10 corresponding to the second linear prediction coefficients at the second
sampling frequency based on the first linear prediction coefficients or an
equivalent parameter, a means for calculating, on the real axis of the
unit circle, autocorrelation coefficients from the power spectrum, and a
means for converting the autocorrelation coefficients to the second
15 linear prediction coefficients at the second sampling frequency.
29
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