FUNDAMENTAL FREQUENCY TRAJECTORY MODEL PARAMETER EXTRACTION DEVICE, FUNDAMENTAL FREQUENCY TRAJECTORY MODEL PARAMETER EXTRACTION METHOD, PROGRAM, AND RECORDING MEDIUM

摘要

PROBLEM TO BE SOLVED: To appropriately perform modeling of a dynamic fluctuation itself and to correctly estimate a pitch string constituting a melody only from an F0 trajectory.

SOLUTION: An initial pitch target value creation section 2 creates the initial pitch target value series from the observation fundamental frequency time series extracted by a fundamental frequency extraction section 1. An inverted filter output value series-updating section 4 creates the inverted filter output value series and the specific parameter from the initial pitch target value time series and the observation fundamental frequency time series frame-divided by a frame division section 3. A pitch target value-updating section 5 creates the pitch target value time series from the inverted filter output value series and the observation fundamental frequency time series of all the frames. A convergence determination 6 determines whether the characteristic parameter and the pitch target value time series satisfy a prescribed standard or not, and when it is determined that prescribed standard is satisfied, a fundamental frequency trajectory parameter output section 7 outputs the characteristic parameter and the pitch target value time series.

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