第22回ロボット聴覚特集 - 奥乃研究室 - 京都大学

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q k Moore-Penrose D + ˆq i (f) = D+ r i (f)2πfc −1 , ˆq i(f) ← ˆq i(f)||ˆq i (f)||(16)4.1 3 BSS (16) 3.3 a i (f) ā i (f) permutation ā i (f) =[ā 1i (f),...,ā Mi (f)] T ā ji (f) [ā ji (f) ←|a ji (f)| exp j arg[a ]ji(f)/a Ji (f)]4fc −1 (17)d maxFigure 6: 3 6 4cm 8 J d max J scaling 1 ā i (f) ← ā i (f) / ||ā i (f)|| (18) ā i (f) (9) q k p 1 ,...,p M (14) ā ji (f) ≈ √ 1 [exp j π (p j − p J ) T ]q k,M 2 d max f [15] ā i C 1 ,...,C M C k c k |C k | C k c k ← ∑ā/|C k |, c k ← c k /||c k ||, (19)ā∈C kā ∈ C k c k J J =M∑J k , J k = ∑k=1ā∈C k||ā − c k || 2 . (20)Figure 7: f Π f Π f =argmin ΠM ∑k=1||ā Π(k) (f) − c k || 2 . (21)4.2 3 4 2 4.1 3 6 6 3 6 8 BSS 8 6 BSS 2GHz PentiumM PC 25 (16) 7 20
Table 1: 6 : SIR (dB)SIR 1 SIR 2 SIR 3 SIR 4 SIR 5 SIR 6 SIR −11.6 −9.0 −9.0 −6.6 −6.9 −2.5 −7.6SIR 19.2 21.2 25.4 21.0 20.5 16.2 20.670cm90cma120主要音源80cm445 cmb120270cm25cm80cmSquared distance10.80.60.40.2Squared distances from corresponding centroid11100 2 40.80.60.40.200 2 40.80.60.40.200 2 4Frequency (kHz)0.80.60.40.200 2 4Figure 9: 1 355 cmc170 ( 高さ170 cm)2.5cmMic. 3 Mic. 14cm2.5cm2.3cmMic. 43.5cm Mic. 2背景雑音マイクロホン80cm150cm80cm25cm25cm• 部屋の高さ: 250 cm • 残響時間 : RT 60= 130 ms• スピーカとマイクロホンの高さは120cm,ただしc170は170cmSquared distance10.80.60.40.2Squared distances from corresponding centroid11100 2 40.80.60.40.200 2 40.80.60.40.200 2 4Frequency (kHz)0.80.60.40.200 2 4Figure 8: 3 Figure 10: 3 ˆq i (f) 1 6 permutation permutation SIR: Signal-to-Interference Ratio 1 SIR 20dB4.2 8 6 3 9 4 4 ICA permutation 3.3 9 10 4 M 4 J k /|C k | 9 1 10 3 3 11 1 1 6 7 4 ICA 11 2) [15] 3) 4) 3 SIR 2 10 4 9 3 6 10dB SIR http://www.kecl.ntt.co.jp/icl/signal/sawada/demo/dominant/ 21
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第22回 ロボット聴覚特集 - 奥乃研究室 - 京都大学

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第22回ロボット聴覚特集 - 奥乃研究室 - 京都大学