SOUND SOURCE SIGNAL ESTIMATION DEVICE, SOUND SOURCE SIGNAL ESTIMATION METHOD, AND PROGRAM

摘要

Provided is a sound source signal estimation technique capable of suppressing deterioration in sound quality by removing a crosstalk component in consideration of both an amplitude component and a phase component. βm, m'(ω) (1 ≤ m ≤ M, 1 ≤ m' ≤ M, m' ≠ m) is used as a coefficient that indicates the degree that a crosstalk component of a signal from an m'-th sound source is mixed in an m-th separation sound source signal ^Sm(f, ω). A crosstalk component removal unit includes: a coefficient calculation unit that, by solving a prescribed optimization problem with respect to a pair of m and m' which satisfy 1 ≤ m ≤ M, 1 ≤ m' ≤ M, and m' ≠ m, calculates the coefficient βm, m'(ω); and a crosstalk component removal signal calculation unit that, from the m-th separation sound source signal ^Sm(f, ω) (m = 1, ..., M), and using the coefficient βm, m'(ω), calculates an m-th estimation sound source signal ~Sm(f, ω) (m = 1, ..., M).