Reverberation removal device, reverberation removal method, reverberation removal program, recording medium

摘要

PPROBLEM TO BE SOLVED: To provide a reverberation removal apparatus, etc. capable of suppressing residual component remaining, immediately after a sound collection signal having a large amplitude and a terminal end portion of an object sound. PSOLUTION: The reverberation removal apparatus includes: a time-varying suppression coefficient output part for outputting a time-varying suppression coefficient λSBm/SB(t), depending on the changes in the power time envelope values eSBm/SB(t) of sound collection signals xSBm/SB(n), obtained by sampling sound collection signals of M channels(m) which are respectively observed by M sensors at a plurality of points of time; and a reverberation separating part for obtaining a reverberation removal signal ySBm/SB(n), by using the sound collection signal xSBm/SB(n) and the time-varying suppression coefficient λSBm/SB(t). PCOPYRIGHT: (C)2010,JPO&INPIT