Multichannel Speech Enhancement in Vehicle Environment Based on Interchannel Attention Mechanism

Table 1

Evaluation results of our proposed model compared with other methods on the same dataset. Four metrics and two SNRs are considered.

Method	# Mics	SDR		SI-SNR		PESQ		STOI
		−10 dB	−5 dB	−10 dB	−5 dB	−10 dB	−5 dB	−10 dB	−5 dB
Noise	2 linear	−6.72	0.34	−7.19	0.24	1.07	1.13	0.40	0.64
	4 linear	−5.93	0.11	−6.40	0.02	1.06	1.11	0.40	0.64
	2 × 2 dB	−6.72	0.32	−6.18	0.22	1.07	1.13	0.40	0.64
	4 dB	−6.89	0.68	−7.17	0.60	1.07	1.13	0.46	0.70
+NCC	2 linear	7.45	11.98	6.42	11.30	1.20	1.76	0.73	0.87
	4 linear	8.89	12.44	7.86	11.75	1.28	1.83	0.75	0.88
	2 × 2 dB	7.63	13.14	7.50	12.37	1.23	1.85	0.71	0.89
	4 dB	8.38	14.58	7.60	13.96	1.30	2.02	0.76	0.91
+ICD	2 linear	7.42	11.95	6.39	11.27	1.19	1.75	0.72	0.86
	4 linear	8.80	12.38	7.79	11.68	1.27	1.82	0.74	0.87
	2 × 2 dB	7.55	13.06	7.44	12.30	1.22	1.83	0.71	0.89
	4 dB	8.33	14.51	7.56	13.93	1.27	2.01	0.76	0.91
+MCS	2 linear	7.40	11.92	6.36	11.25	1.19	1.75	0.72	0.86
	4 linear	8.83	12.40	7.83	11.72	1.27	1.82	0.74	0.87
	2 × 2 dB	7.52	13.04	7.42	12.28	1.21	1.82	0.70	0.88
	4 dB	8.28	14.46	7.52	13.79	1.25	2.00	0.75	0.90
Proposed	2 linear	7.52	12.06	6.48	11.36	1.22	1.77	0.74	0.88
	4 linear	8.94	12.49	7.91	11.83	1.29	1.83	0.75	0.88
	2 × 2 dB	7.72	13.23	7.58	12.45	1.24	1.86	0.72	0.90
	4 dB	8.41	14.66	7.66	14.07	1.33	2.04	0.76	0.91

The best evaluation results are shown in bold, comparing the results of the four speech enhancement methods used in the four microphone arrays.