Table 2.

Comparison of recognition rates for the base classifiers when they are used within the proposed system (blue) with that of the same base classifiers when they are used independently (red) on utterances distorted with pink noise.

SNR (dB)	Success Recognition Rate of Base Classifiers (%)
	GMM-MFCC MLC			GMM-MFCC Supervector SVM			GMM-GFCC MLC			GMM-GFCC Supervector SVM
	Indep.	Two -Stage	$|\%\mathbf{\Delta }|$	Indep.	Two -Stage	$|\%\mathbf{\Delta }|$	Indep.	Two -Stage	$|\%\mathbf{\Delta }|$	Indep.	Two -Stage	$|\%\mathbf{\Delta }|$
−5	46.22	61.27	32.58	40.91	53.79	31.49	39.86	56.23	41.05	25.94	46.13	77.85
0	47.18	63.80	35.23	41.46	53.97	30.17	68.89	82.03	19.07	56.47	70.05	24.05
5	50.74	65.72	29.54	44.87	55.25	23.14	84.23	92.26	9.54	75.38	85.76	13.77
10	56.94	73.70	29.43	53.15	66.11	24.39	93.06	98.15	5.47	88.15	92.59	5.04
15	65.56	76.85	17.23	65.09	75.37	15.79	97.31	99.81	2.57	91.76	93.33	1.72
20	73.06	83.89	14.83	78.33	85.93	9.69	98.89	99.81	0.94	92.87	92.96	0.1
25	79.07	87.96	11.24	86.11	91.30	6.02	99.07	99.81	0.75	93.24	92.78	0.5
30	83.06	90.56	9.03	91.67	93.70	2.22	99.54	100	0.47	93.15	91.85	1.39
35	87.04	93.70	7.66	93.61	97.22	3.86	99.63	100	0.37	92.13	91.67	0.5
40	91.02	95.56	4.98	95.19	97.04	1.95	99.54	100	0.47	91.57	91.85	0.3
45	94.81	97.41	2.73	96.20	97.59	1.44	99.44	100	0.56	91.30	92.04	0.81
50	96.20	98.70	2.6	96.67	97.96	1.34	99.54	100	0.47	91.67	91.67	0.0
55	97.04	99.26	2.29	97.13	97.96	0.86	99.44	99.81	0.37	91.85	91.67	0.2
60	97.04	99.63	2.67	97.22	97.78	0.57	99.54	99.81	0.28	91.76	91.67	0.1
65	97.41	99.63	2.28	97.50	97.78	0.28	99.54	99.81	0.28	91.67	92.04	0.4