REVERBERATION PREDICTION FILTER CALCULATION DEVICE, REVERBERATION SUPPRESSION DEVICE, REVERBERATION PREDICTION FILTER CALCULATION METHOD, REVERBERATION SUPPRESSING METHOD AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a technology for suppressing reverberation included in a musical signal. SOLUTION: A short time power spectrum sequence of a sound source signal is estimated by using a model (harmonic Generalized Method of Moments (GMM) with floor) in which a power spectrum floor that is a power spectrum for burying a gap of a power spectrum between harmonic components by the harmonic GMM is added to the harmonic GMM as the model of the short time power spectrum sequence of the sound source signal. At this time, a harmonic parameter of the harmonic GMM with a floor (a harmonic parameter with floor) is estimated, and as the harmonic parameter with a floor, for example, the harmonic parameter with a floor which gives a power spectrum for minimizing I-divergence for an energy spectrum of a temporary estimation value of a short time Fourier coefficient sequence of the sound source signal is determined. COPYRIGHT: (C)2011,JPO&INPIT