Table 2 Description of the 24 available noise suppression related degradation conditions.
From: Performance Study of Objective Speech Quality Measurement for Modern Wireless-VoIP Communications
Conditions | Tandem | Codec- PLC | Noise Type | SNR (dB) |
|---|---|---|---|---|
1–18 | None | G.711, G.729, AMR | hoth | 0,10 |
| Â | Â | Â | car | 10 |
| Â | Â | Â | street | 10 |
| Â | Â | Â | babble | 10,20 |
19–24 | Asynchronous | G.729 | hoth, car, babble | 10 |
G.729, AMR 
AMR