第22回 ロボット聴覚特集 - 奥乃研究室 - 京都大学

SIMO-ICA SIMO Figure 2(a)SIMO-ICA 2 BSS SIMO-ICA ICA 2 (Figure 2(b)) [17] ICA Y l (f,t) =B l (f)S l (f,t) +E l (f,t) (l =1, ··· ,L)( B l (f) E l (f,t) ICA) E l (f,t) – 0 () Y 1 (f,t) Y 2 (f,t) ICA BSS SIMO-ICA SIMO-ICA SIMO A kl (f)S l (f,t) SIMO SIMO-ICA 3.2 SIMO-ICA [10] ICA SIMO SIMO-ICA SIMO-ICA (FD-SIMO-ICA) FD-SIMO-ICA (L − 1) FDICA fidelity controller(FC) ICA FD-SIMO-ICA l ICA (l =1,...,L− 1) []Y (ICAl) (f,t) = Y (ICAl)k(f,t) = W (ICAl) (f) X (f,t)k1(6)UnknownKnownS1(f) X1(f)A11(f)A12(f)A21(f)A22(f)S2(f) X2(f)FD-SIMO-ICAICA1-+-+++Fidelity controllerTo beindependent(ICA1)Y1(ICA1)Y2YY(ICA2)1(ICA2)2To beindependent(f,t)(f,t)(f,t)(f,t)Figure 3: K = L =2 FD-SIMO-ICA W (ICAl) (f) =[W (ICAl)ij (f)] ij l FDICAFC L−1∑Y (ICAL) (f,t) =X (f,t) − Y (ICAl) (f,t) (7)l=1Y (ICAL) (f,t) L ICA L ICA ICA Y (ICAL) (f,t) W (ICAl) (f) (l =1, ··· ,L− 1) (− ∑ L−1l=1 Y (ICAl)(f,t)) (7) ICA ∑ Ll=1 Y (ICAl)(f,t) SIMO [ ∑ Ll=1 A kl(f)S l (f,t)] k1 (= X(f,t)) (6) (7) SIMO Y (ICAl) (f,t) =diag [ A(f)PlT ]Pl S (f,t) (8) P l (l =1,...,L) ∑ Ll=1 P l =[1] ij [10] (8) l SIMO A kl (f)S l (f,t)SIMO-ICA L = K =2ICA [] TY (ICA1)1 (f,t), Y (ICA1)2 (f,t)=[A 11 (f)S 1 (f,t), A 22 (f)S 2 (f,t)] T , (9)[] TY (ICA2)1 (f,t), Y (ICA2)2 (f,t)=[A 12 (f)S 2 (f,t), A 21 (f)S 1 (f,t)] T , (10)P 1 = IP 2 =[1] ij − I 25