Table 5 Impairment factor values 
for WB and NB speech codecs, derived on the basis of WB-PESQ estimations. Values in the last column have been calculated according to (10) using the defined values of ITU-T Rec. G.113 [10].
for WB and NB speech codecs, derived on the basis of WB-PESQ estimations. Values in the last column have been calculated according to (10) using the defined values of ITU-T Rec. G.113 [From: Instrumental Estimation of E-Model Parameters for Wideband Speech Codecs
Band. | Codec | Bit-rate | Database no. | Average | Expected | |||||
|---|---|---|---|---|---|---|---|---|---|---|
(kbit/s) | 1 | 2 | 3 | 4 | 5 | 7 | from G.113 | |||
WB | Clean |
|
|
|
|
|
|
|
|
|
G.722 |
|
|
|
|
|
|
|
|
| |
G.722 |
|
|
|
|
|
|
|
|
| |
G.722 |
|
|
|
|
|
|
|
|
| |
G.722.1 |
|
|
|
|
|
|
|
|
| |
G.722.1 |
|
|
|
|
|
|
|
|
| |
G.722.2 |
|
|
|
|
|
|
|
|
| |
G.722.2 |
|
|
|
|
|
|
|
|
| |
G.722.2 |
|
|
|
|
|
|
|
|
| |
G.722.2 |
|
|
|
|
|
|
|
|
| |
G.722.2 |
|
|
|
|
|
|
|
|
| |
G.722.2 |
|
|
|
|
|
|
|
|
| |
G.722.2 |
|
|
|
|
|
|
|
|
| |
G.722.2 |
|
|
|
|
|
|
|
|
| |
G.722.2 |
|
|
|
|
|
|
|
|
| |
G.729EV |
|
|
|
|
|
|
|
| ||
G.729EV |
|
|
|
|
|
|
|
| ||
NB | G.711 |
|
|
|
|
|
|
|
|
|
G.726 |
|
|
|
|
|
|
|
|
| |
G.726 |
|
|
|
|
|
|
|
|
| |
G.726 |
|
|
|
|
|
|
|
|
| |
G.728 |
|
|
|
|
|
|
|
|
| |
G.729 |
|
|
|
|
|
|
|
|
| |
GSM-EFR |
|
|
|
|
|
|
|
|
| |
GSM-FR |
|
|
|
|
|
|
|
|
| |
G.729EV refers to the prepublished version of the ITU-T Rec. G.729.1 [7] standard.
G.729EV refers to the prepublished version of the ITU-T Rec. G.729.1 [