Table 4 The average STOIs (%) with and without postfiltering for the typical DNN-based speech enhancement methods
SNR/dB | − 5 | 0 | 5 | 10 | Aver. | SNR/dB | − 5 | 0 | 5 | 10 | Aver. |
|---|---|---|---|---|---|---|---|---|---|---|---|
Noisy | 60.12 | 73.29 | 85.89 | 91.30 | 77.65 | Noisy | 60.12 | 73.29 | 85.89 | 91.30 | 77.65 |
CRN | 77.46 | 86.82 | 93.93 | 95.70 | 88.48 | DCN | 79.46 | 86.10 | 93.78 | 95.73 | 88.77 |
SPP-MMSE | 76.95 | 86.55 | 93.67 | 95.71 | 88.22 | SPP-MMSE | 78.92 | 85.61 | 93.59 | 95.79 | 88.48 |
SPP-proposed-1 | 75.28 | 84.70 | 92.76 | 95.46 | 87.05 | SPP-proposed-1 | 76.89 | 84.06 | 92.72 | 95.56 | 87.31 |
SPP-proposed-2 | 75.42 | 84.84 | 92.41 | 95.03 | 86.93 | SPP-proposed-2 | 77.56 | 84.28 | 92.17 | 95.37 | 87.34 |
SPP-proposed-3 | 75.51 | 85.65 | 93.62 | 95.83 | 87.65 | SPP-proposed-3 | 77.27 | 85.21 | 93.46 | 95.91 | 87.96 |
GRN | 79.52 | 87.93 | 94.23 | 95.71 | 89.35 | DARCN | 79.44 | 88.99 | 94.02 | 95.64 | 89.52 |
SPP-MMSE | 79.36 | 87.79 | 94.03 | 95.66 | 89.21 | SPP-MMSE | 79.26 | 88.92 | 93.89 | 95.63 | 89.43 |
SPP-proposed-1 | 77.34 | 85.94 | 93.15 | 95.60 | 88.01 | SPP-proposed-1 | 76.95 | 86.73 | 92.83 | 95.37 | 87.97 |
SPP-proposed-2 | 77.61 | 86.28 | 92.67 | 94.97 | 87.88 | SPP-proposed-2 | 77.54 | 86.41 | 91.51 | 93.75 | 87.30 |
SPP-proposed-3 | 77.94 | 87.06 | 94.08 | 95.86 | 88.74 | SPP-proposed-3 | 77.65 | 87.37 | 93.74 | 95.58 | 88.59 |