SOUND FIELD COLLECTING/REPRODUCING DEVICE, METHOD AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a sound field collection reproduction technique for reproducing a sound field even if speakers configuring a speaker array have an arbitrary directivity.SOLUTION: A conversion filter 3 creates a filtered signal D-(ω) by applying a filter F-(ω) defined by a following formula to a spatiotemporal frequency region signal P-(ω) created based on a signal collected by a microphone array. A space frequency inverse conversion unit 4 converts the filtered signal D-(ω) into a frequency region signal by spatial inverse Fourier transformation. A frequency inverse conversion unit 5 converts the frequency region signal into a time-domain signal by inverse Fourier transformation.