Quality Enhancement of Compressed Audio Based on Statistical Conversion

EURASIP Journal on Audio, Speech, and Music Processing

Table 3 Cepstral conversion results for the rock music signal.

Subband index	Cepstral order	Selected vectors per subband	Multiplier	Sorting information size (bits/coeff.)	Distance between source and target	Distance between resynthesized and target	Distance between resynthesized and target without sorting	Distance between resynthesized and target without sorting, without DCT
2	8	168	8	2.61	0.0182	0.0053	0.0137	0.0158
3	8	162	8	2.61	0.0259	0.0079	0.0194	0.0240
4	8	163	8	2.61	0.0222	0.0063	0.0153	0.0168
5	8	153	8	2.61	0.1255	0.0126	0.0455	0.0536
6	8	163	8	2.61	0.0733	0.0118	0.0333	0.0419
7	8	170	8	2.61	0.0252	0.0073	0.0190	0.0214
8	8	166	8	2.61	0.0439	0.0086	0.0253	0.0278
9	8	70	8	2.61	0.2489	0.0179	0.1955	1.1005
10	8	66	8	2.61	0.2208	0.0189	0.1367	1.3197
11	8	182	16	2.53	0.7676	0.0274	0.0973	0.1177
12	8	182	16	2.53	0.2695	0.0091	0.0433	0.0464
13	8	182	16	2.53	1.3958	0.0110	0.0905	0.0931
15	15	182	30	2.39	0.1161	0.0096	0.0391	0.0581
16	15	182	30	2.39	0.6692	0.0220	0.1137	0.1433
17	15	182	30	2.39	0.3000	0.0149	0.0458	0.0666