TABLE I:

Performance comparisons between different configurations of dense block, dilation, and attention in DCN. Boldface indicates the best score in a given condition.

Metric				STOI								PESQ								SNR
Test noise				Babble				Cafeteria				Babble				Cafeteria				Babble				Cafeteria
Test SNR (dB)				−5	0	5	Avg.	−5	0	5	Avg.	−5	0	5	Avg.	−5	0	5	Avg.	−5	0	5	Avg.	−5	0	5	Avg.
Mix. →	m ↓	Dil. ↓	Att. ↓	58.4	70.5	81.3	70.1	57.1	69.7	81.0	69.2	1.56	1.82	2.12	1.83	1.46	1.77	2.12	1.78	−5.0	0.0	5.0	0	−5.0	0.0	5.0	0.0
Causal	1	✕	✕	76.7	88.0	93.2	86.0	76.4	87.8	92.9	85.7	1.90	2.39	2.76	2.35	2.02	2.49	2.84	2.45	5.5	9.9	13.4	9.6	6.5	10.4	13.4	10.1
	2	✕	✕	81.6	91.3	95.0	89.3	80.5	90.2	94.3	88.3	2.13	2.70	3.08	2.64	2.17	2.68	3.05	2.63	7.4	11.5	14.7	11.2	7.7	11.4	14.4	11.2
	2	✓	✕	83.5	91.9	95.2	90.2	81.4	90.5	94.5	88.8	2.23	2.75	3.12	2.70	2.21	2.70	3.07	2.66	7.7	11.8	15.0	11.5	7.9	11.5	14.5	11.3
	2	✓	✓	84.9	92.2	95.3	90.8	82.1	90.7	94.6	89.1	2.30	2.77	3.14	2.74	2.23	2.71	3.08	2.67	8.2	12.0	15.1	11.8	8.2	11.7	14.7	11.5
	2	✕	✓	85.3	92.3	95.4	91.0	82.3	90.8	94.7	89.3	2.34	2.81	3.17	2.77	2.24	2.72	3.09	2.68	8.5	12.1	15.1	11.9	8.2	11.7	14.7	11.5
	1	✕	✓	83.9	91.8	95.2	90.3	81.0	90.3	94.5	88.6	2.23	2.72	3.09	2.68	2.15	2.62	3.01	2.59	7.9	11.8	15.0	11.6	7.9	11.5	14.5	11.3
Non-causal	3	✕	✕	84.7	92.5	95.7	90.9	83.1	91.4	95.0	89.8	2.37	2.88	3.22	2.82	2.34	2.82	3.16	2.77	8.2	12.2	15.2	11.9	8.3	11.8	14.7	11.6
	3	✓	✕	86.6	92.9	95.7	91.7	84.1	91.7	95.0	90.3	2.53	2.96	3.24	2.91	2.44	2.88	3.19	2.84	9.1	12.5	15.3	12.3	8.7	12.0	14.8	11.8
	3	✓	✓	87.9	93.5	96.0	92.4	85.0	92.0	95.2	90.8	2.61	3.02	3.32	2.98	2.47	2.91	3.24	2.87	9.6	12.9	15.7	12.7	8.9	12.2	15.0	12.0
	3	✕	✓	87.9	93.5	96.1	92.5	85.0	92.1	95.3	90.8	2.61	3.04	3.33	2.99	2.45	2.91	3.23	2.86	9.6	12.9	15.8	12.8	8.9	12.3	15.1	12.1
	1	✕	✓	83.7	91.5	95.2	90.1	80.1	89.8	94.3	88.1	2.24	2.71	3.09	2.68	2.13	2.59	2.98	2.57	8.3	12.0	15.2	11.8	7.8	11.4	14.6	11.3