Table 1 Average STOI scores (%) comparisons of different clean speech states and basis vectors (\(\ddot{J} = 1,{\ddot{K}}=70\))

NMF-HMM, \({\overline{J}}=1\)(T-NMF)

65.00 (\(\pm \,{0.43}\))

69.29 (\(\pm \, 0.44)\)

72.71 (\(\pm \, 0.48\))

73.32 (\(\pm \, 0.49)\)

NMF-HMM, \({\overline{J}}=5\)

68.66 (\(\pm \,{0.42 }\))

71.93 (\(\pm \, 0.45)\)

73.94 (\(\pm \, 0.47\))

74.02 (\(\pm \, 0.49)\)

NMF-HMM, \({\overline{J}}=10\)

69.71 (\(\pm \,{ 0.42}\))

72.74 (\(\pm \, 0.45)\)

74.39 (\(\pm \, 0.47\))

74.37 (\(\pm \, 0.50)\)

NMF-HMM, \({\overline{J}}=20\)

71.14 (\(\pm \,{0.43 }\))

73.51 (\(\pm \, 0.45)\)

74.76 (\(\pm \, 0.48\))

74.87 (\(\pm \, 0.50)\)

NMF-HMM, \({\overline{J}}=40\)

71.81 (\(\pm \,{0.44 }\))

73.66 (\(\pm \, 0.45)\)

75.00 (\(\pm \, 0.48\))

74.73 (\(\pm \, 0.51)\)