From: Non-parallel dictionary learning for voice conversion using non-negative Tucker decomposition
 | Male-to-female | Female-to-male | Male-to-male | Female-to-female | Mean | ||||||
---|---|---|---|---|---|---|---|---|---|---|---|
 | M1\(\rightarrow \)F1 | M2\(\rightarrow \)F2 | M3\(\rightarrow \)F3 | F1\(\rightarrow \)M1 | F2\(\rightarrow \)M2 | F3\(\rightarrow \)M3 | M1\(\rightarrow \)M3 | M3\(\rightarrow \)M2 | F1\(\rightarrow \)F3 | F3\(\rightarrow \)F2 |  |
GMM | 6.67 | 7.35 | 6.76 | 6.60 | 6.97 | 7.04 | 6.41 | 7.36 | 6.42 | 7.21 | 6.88 ± 0.04 |
NMF | 6.24 | 6.62 | 6.32 | 6.14 | 6.34 | 6.23 | 6.20 | 6.68 | 6.11 | 6.08 | 6.30 ± 0.03 |
NTD | 6.12 | 6.50 | 6.31 | 6.04 | 6.23 | 6.08 | 6.05 | 6.66 | 5.99 | 5.86 | 6.19 ± 0.03 |