SOUND SOURCE SEPARATION DEVICE

PROBLEM TO BE SOLVED: To provide a sound source separation device capable of reducing a delay time in performing sound source separation on-line while maintaining separation and extraction performance of a sound source.SOLUTION: A sound source separation device 1 includes: a separation matrix processing part 20 for converting observation signals x1(n), x2(n) output from microphones 10, 11 for collecting sounds propagated from a plurality of sound sources into a signal group of a frequency region, updating a separation matrix W(ω) on the basis of the signal group, and converting the updated separation matrix into a time series of filter coefficients ha(n) to output the filter coefficients ha(n); a filter coefficient conversion part 30 for partially removing a non-causal component included in the filter coefficient ha(n) to perform conversion into a filter coefficient h(n); and a separation part 40 for supplying the filter coefficient h(n) to filter groups 41 to 44, and generating a plurality of separation signals y1(n), y2(n) separated from the observation signals x1(n), x2(n) in correspondence with the separation matrix W(ω).SELECTED DRAWING: Figure 1 【課題】音源の分離・抽出性能を保ちつつ、オンラインで音源分離を行う際の遅延時間を低減可能な音源分離装置を提供する。【解決手段】音源分離装置１は、複数の音源から伝搬する音を収集するマイクロホン１０、１１から出力される観測信号ｘ１（ｎ）、ｘ２（ｎ）を周波数領域の信号群に変換し、この信号群に基づき分離行列Ｗ（ω）を更新し、更新後の分離行列を時系列のフィルタ係数ｈａ（ｎ）に変換して出力する分離行列処理部２０と、フィルタ係数ｈａ（ｎ）に含まれる非因果成分を部分的に除去してフィルタ係数ｈ（ｎ）に変換するフィルタ係数変換部３０と、このフィルタ係数ｈ（ｎ）をフィルタ群４１〜４４に供給し、分離行列Ｗ（ω）に対応して観測信号ｘ１（ｎ）、ｘ２（ｎ）から分離された複数の分離信号ｙ１（ｎ）、ｙ２（ｎ）を生成する分離部４０とを備えて構成される。【選択図】図１