第22回 ロボット聴覚特集 - 奥乃研究室 - 京都大学

ICA ICA K × LSIMO ICA , Matsuoka et al. Minimal Distortion Principle[17] ICA . ICA KLD FIR B l (z) , , .2.3 SIMO ICA BSS , , . , w(n) ([18]). SIMO [19, 20], y l (t) , k [21, 22]. , Null space ,, IIR ICA[23] , . Cardoso SIMO MultidimensionalICA (MICA) [24] MICA., FIR SIMO SIMO ICA 3 : SIMO-ICA 2 SIMO SIMO-ICA [9,10,11,12]. SIMO-ICA, 2 2 ICA fidelity controller (FC) 1 [11, 12]SIMO-ICA ICA y (ICA) (t) = [y (ICA)1 (t),y (ICA)2 (t)]=D−1∑n=0w (ICA) (n)x(t − n), (4), w (ICA) (n) ICA . FC, .y (FC) (t) = [y (FC)1 (t),y (FC)2 (t)]= x(t − D 2 ) − y (ICA)(t). (5), y FC (t) ICA , ICA .w FC (n) =Iδ(n − D 2 ) − w ICA(n). (6)δ(n) δ(0) = 1, δ(n) =0(n ̸= 0), (6) (5) .y FC (t) =D−1∑n=0w FC (n)x(t − n). (7)ICA , FC w (FC) (n) w (ICA) (n) , , “” . (5) , FC.[ ]0y (ICA) (t)+y (FC) (t) − x(t − D/2) = . (8)0 y (ICA) (t)+y (FC) (t) SIMO [ ∑ Ll=1 A kl(z)s l (t−D/2)] k1 (= x(t−D/2)). , D/2 ., (4) , (5) , . , [10]11