WIENER FILTER DESIGN DEVICE, SPEECH ENHANCEMENT DEVICE, WIENER FILTER DESIGN METHOD AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a Wiener filter design device capable of designing a Wiener filter realizing speech enhancement that only aimed sound in a narrow range is collected.SOLUTION: The Wiener filter design device comprises: a sudden PSD estimation unit 203 which estimates power spectral density of sudden target sound on the basis of time change of spot power spectral density of an observation signal; and a Wiener filtering unit 204 which designs a Wiener filter using the power spectral density of sudden target sound.SELECTED DRAWING: Figure 4