Table 5 Objective speech quality comparison among various methods
From: An efficient algebraic codebook search for ACELP speech coder
Methods | PESQ | MOS-LQO | |||||||
|---|---|---|---|---|---|---|---|---|---|
Mean | STD | Max. | Min. | Mean | STD | Max. | Min. | ||
G.729A | 3.8126 | 0.0838 | 3.9640 | 3.5150 | 3.9502 | 0.1026 | 4.1230 | 3.5670 | |
GPR | R = 1 | 3.8145 | 0.0757 | 4.0850 | 3.5640 | 3.9521 | 0.0883 | 4.2350 | 3.6410 |
R = 2 | 3.8324 | 0.0777 | 4.0490 | 3.5420 | 3.9725 | 0.0906 | 4.2010 | 3.6110 | |
R = 3 | 3.8376 | 0.0739 | 3.9830 | 3.5950 | 3.9786 | 0.0859 | 4.1370 | 3.6830 | |
R = 4 | 3.8382 | 0.0749 | 4.0350 | 3.5560 | 3.9793 | 0.0867 | 4.1880 | 3.6310 | |
IFPR | 3.8276 | 0.0761 | 4.0830 | 3.5820 | 3.9672 | 0.0884 | 4.2330 | 3.6650 | |
RCM | N = 1 | 3.7083 | 0.0807 | 3.9050 | 3.3230 | 3.8250 | 0.1026 | 4.0550 | 3.3030 |
N = 2 | 3.8064 | 0.0819 | 4.0770 | 3.5190 | 3.9423 | 0.0971 | 4.2280 | 3.5800 | |
N = 3 | 3.8256 | 0.0740 | 3.9880 | 3.5850 | 3.9651 | 0.0868 | 4.1420 | 3.6700 | |
N = 4 | 3.8331 | 0.0735 | 3.9710 | 3.5570 | 3.9735 | 0.0859 | 4.1240 | 3.6320 | |
Proposed method | N = 1 | 3.7083 | 0.0807 | 3.9050 | 3.3230 | 3.8250 | 0.1026 | 4.0550 | 3.3030 |
N = 2 | 3.7937 | 0.0775 | 4.0220 | 3.5120 | 3.9279 | 0.0927 | 4.1760 | 3.5700 | |
N = 3 | 3.8143 | 0.0766 | 4.0270 | 3.5640 | 3.9518 | 0.0906 | 4.1800 | 3.6410 | |
N = 4 | 3.8312 | 0.0682 | 4.0320 | 3.6100 | 3.9717 | 0.0791 | 4.1860 | 3.7020 | |