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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