ETR 229 : 20001
Current
The latest, up-to-date edition.
EUROPEAN DIGITAL CELLULAR TELECOMMUNICATIONS SYSTEM; HALF RATE SPEECH; PERFORMANCE CHARACTERIZATION OF THE GSM HALF RATE SPEECH CODEC
Hardcopy , PDF
English
Foreword
Introduction
1 Scope
2 References
3 Abbreviations
4 Quality under error conditions (A-law, IRS), Experiment 1
5 Quality under error conditions (UPCM, No IRS), Experiment 2
6 Quality under tandeming conditions
6.1 Quality under tandeming conditions, Experiment 3
6.2 Effect of tandeming with other standards, Experiment 7
7 Quality under background noise conditions
7.1 Experiments 4 & 5
7.2 Special background noise
8 Assessment of equivalent qdu, Experiment 6
9 Talker Dependency, Experiment 8
10 DTX System
10.1 Assessment of DTX algorithm, Experiment 9
10.2 Channel activity in DTX mode
11 Performance with DTMF tones
11.1 Introduction
11.2 Test set-up
11.3 Results
11.4 Conclusions
11.5 Result tables of experiments with standard and modified
DTMF detectors
12 Performance with signalling tones
13 Delay
14 Frequency response
15 Half Rate codec complexity
16 Summary of results from characterization Phase I and II
16.1 Summary of Results From Characterization Phase I
16.2 Summary of Results From Characterization Phase II
16.3 Conclusion
Annex A: Bibliography
History
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