|
Listening Quality
|
|
Conversational Quality
|
|
Mouth-to-Ear Delay : 300-400 ms
|
|
Transmission Quality
|
|
MOS (Mean Opinion Score)
|
| MOS指標 | 使用者滿意度
| 5
| 很好 (Excellent)
| 4
| 好 (Good)
| 3
| 普通 (Fair)
| 2
| 差 (Poor)
| 1
| 極差 (Bad)
| |
|---|
|
E-Model
|
|
Mean Opinion Score (MOS)
|
| MOS Index | User Satisfaction
| 5
| Excellent
| 4
| Good
| 3
| Fair
| 2
| Poor
| 1
| Bad
| |
|---|
|
Typical Representation of Call Quality Level
|
| User Opinion | MOS (ITU Scaled)
| Very satisfied
| 4.3-5.0
| Satisfied
| 4.0-4.3
| Some User Satisfied
| 3.6-4.0
| Many User Dissatisfied
| 3.1-3.6
| Nearly All User Dissatisfied
| 2.6-3.1
| Not Recommended
| 1.0-2.6
| |
|---|