Content for TR 46.076 Word version: 18.0.0
4 Development Time-scales
5 Baseline description and working assumptions
6 Feasibility issues
7 Requirements specification
8 Implementation factors
9 Codec development and selection
10 Open issues and risks
11 Recommendations
A Terminology
B Application scenarios
C Codec requirement specification
D AMR implementation requirements
E Speech traffic channel simulator
F Schedule for AMR development
G Work Item Description for AMR
$ Change history
4 Development Time-scales p. 10
5 Baseline description and working assumptions p. 11
5.1 Generic operation p. 11
5.2 Constraints p. 11
5.3 Speech and channel codecs p. 12
5.4 Rate adaptation p. 13
5.5 Support of TFO p. 13
5.6 Support of DTX p. 14
5.7 Support of 8 and 16 kbit/s A-ter sub-multiplexing p. 14
5.8 Active noise suppression p. 14
6 Feasibility issues p. 14
6.1 Codec performance p. 14
6.1.1 Basic, error and background noise performance p. 15
6.1.2 Tandeming p. 16
6.1.3 Seamless codec mode bit-rate changes p. 16
6.1.4 Complexity p. 16
6.2 Quality and Capacity benefits of AMR p. 17
6.2.1 General AMR performance p. 17
6.2.2 Improved coverage from the improved robustness in FR mode p. 17
6.2.3 Capacity benefits from the improved robustness in FR mode p. 18
6.2.4 Quality/capacity trade-offs by use of the HR mode p. 18
6.2.5 System aspects of capacity/quality p. 20
6.2.6 MS penetration p. 21
6.3 Codec adaptation p. 21
6.3.1 Codec mode p. 21
6.3.2 Channel mode p. 22
6.3.3 Channel metrics (accuracy, update rate) p. 22
6.3.4 Channel dynamics, effects on performance p. 22
6.3.5 Location of codec mode and channel mode control p. 23
6.3.6 Radio resource allocation p. 23
6.4 Support of other features p. 24
6.4.1 TFO p. 24
6.4.2 DTX p. 24
6.4.3 Power control p. 24
6.4.4 Handover p. 25
6.4.5 8 and 16 kbit/s A-ter sub-multiplexing p. 25
6.5 Wideband service option p. 25
7 Requirements specification p. 26
8 Implementation factors p. 26
9 Codec development and selection p. 26
9.1 Test and selection methodologies p. 26
9.2 Asymmetry of up and down links p. 27
9.3 Speech traffic channel simulation model p. 27
9.4 Schedule p. 28
9.5 Programme management p. 29
10 Open issues and risks p. 29
11 Recommendations p. 30
A Terminology p. 31
B Application scenarios p. 34
C Codec requirement specification p. 35
C.1 Static conditions p. 35
C.2 Dynamic conditions p. 37
D AMR implementation requirements p. 38
D.1 Network p. 38
D.2 MS p. 40
E Speech traffic channel simulator p. 42
F Schedule for AMR development p. 44
G Work Item Description for AMR p. 46
$ Change history p. 48
