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In the tables below you can find voice quality testing results obtained with the help of test files presented by www.signalogic.com and available for download from their web site.

Table 1

PESQ/Sevana, % Sevana PESQ Score Sevana Quality Score, % (ITU) PESQ Score English Language 1 Sample
100% 4.5 100 4.5 male.wav Original
Fs = 8 kHz
(128000 bps)
100% 4.5 100 4.5 female.wav
96,15% 2,78 51,11 2,673 male600.wav MELPe-Plus17
600 bps
(30 ms)
80,17% 2,86 56,29 2,293 female600.wav

Table 2

PESQ/Sevana, % Sevana MOS Score, % Sevana PESQ Score Sevana Quality Score, % (ITU) PESQ Score English Language 2 Sample
100% 5 4.5 100 4.5 ENG_M.wav Original
Fs = 8 kHz
(128000 bps)
100% 5 4.5 100 4.5 ENG_F.wav
101,15% 1,55 2,61 39,45 2,666 eng_m1.wav MELP
2400 bps
(22.5 msec)
84,02% 3,66 2,91 70,35 2,445 eng_f1.wav
110,42% 1,52 2,59 38,47 2,86 eng_m2.wav MELPe
2400 bps
(22.5 msec)
89,69% 3,0 2,88 62,36 2,583 eng_f2.wav
103,56% 1,61 2,33 24,88 2,413 eng_m3.wav MELPe
1200 bps
(67.5 msec)
83,56% 2,08 2,78 50,68 2,323 eng_f3.wav
101,14% 3,2 2,89 64,77 2,923 eng_m4.wav MELPe-Plus
2400 bps
(22.5 msec)
93,89% 2,96 2,88 61,86 2,704 eng_f4.wav
101,65% 3,54 2,91 68,79 2,958 eng_m5.wav MELPe-Plus
2700 bps
(20 msec)
94,93% 2,98 2,88 62,09 2,734 eng_f5.wav
112,23% 3,56 2,91 69,08 3,266 eng_m6.wav MELPe-Plus
4000 bps
(20 msec)
107,62% 2,54 2,86 56,89 3,078 eng_f6.wav
125,26% 2,45 2,85 55,7 3,57 eng_m7.wav MELPe-Plus17
600 bps
(30 msec)
116,19% 2,26 2,81 53,23 3,265 eng_f7.wav


Fig. 1. Voice quality comparison for English language

Table 3

PESQ/Sevana, % Sevana MOS Score, % Sevana PESQ Score Sevana Quality Score, % (ITU) PESQ Score Chinese Language Sample
100% 5 4.5 100 4.5 ch_m.wav Original
Fs = 8 kHz
(128000 bps)
100% 5 4.5 100 4.5 ch_f.wav
109,92% 1,48 2,53 34,22 2,781 ch_m1.wav MELP
2400 bps
(22.5 msec)
88,69% 3,29 2,9 65,75 2,572 ch_f1.wav
123,69% 1,48 2,49 31,86 3,08 ch_m2.wav MELPe
2400 bps
(22.5 msec)
97,84% 2,32 2,83 54,82 2,769 ch_f2.wav
126,76% 1,72 2,16 20,83 2,738 ch_m3.wav MELPe
1200 bps
(67.5 msec)
86,01% 3,01 2,88 62,5 2,477 ch_f3.wav
107,96% 3,16 2,89 64,24 3,12 ch_m4.wav MELPe-Plus
2400 bps
(22.5 msec)
95,10% 2,98 2,88 62,17 2,739 ch_f4.wav
108,10% 3,13/TD> 2,89 63,89 3,124 ch_m5.wav MELPe-Plus
2700 bps
(20 msec)
97,53% 3,01 2,88 62,48 2,809 ch_f5.wav
119,52% 3,74 2,92 71,35 3,49 ch_m6.wav MELPe-Plus
4000 bps
(20 msec)
109,86% 3,01 2,88 62,52 3,164 ch_f6.wav
130,42% 2,5 2,86 56,4 3,73 ch_m7.wav MELPe-Plus17
600 bps
(30 msec)
127,01% 2,42 2,84 55,38 3,607 ch_f7.wav


Fig. 2. Voice quality comparison for Chinese language

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