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TR 26.978SA4
Results of the Adaptive Multi-Rate (AMR)
Noise Suppression Selection Phase

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Rapporteur:  Mr. Usai, Paolino

This TR provides background information on the performance of the six candidates which were proposed as solutions for publication of an example noise suppression solution for application to the GSM Adaptive Multi-Rate (AMR) speech codec.
Experimental test results from the speech quality related testing are reported to illustrate the behaviour of the candidate algorithms in multiple operational conditions. Additional information is also provided covering data not necessarily directly associated with speech quality (such as complexity, delay, effect on voice activity factor).

full Table of Contents for  TR 26.978  Word version:   15.0.0

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1  ScopeWord-p. 6
2  References
3  Definitions and abbreviations
4  GeneralWord-p. 8
5  Minimum Performance RequirementsWord-p. 10
6  Comparison of Candidates by Subjective MeansWord-p. 11
7  Selection Phase Listening Tests and ResultsWord-p. 12
8  Design ConstraintsUp
9  Impact on Voice Activity Factor VAF (with VAD/DTX active)Word-p. 29
10  Objective Performance MeasurementsWord-p. 30
11  Feasibility Study: Downlink Noise Suppression for AMR
A  Key Selection Phase DocumentsWord-p. 32
B  Selection Phase Test PlanWord-p. 33
C  Global Analysis SpreadsheetWord-p. 34
D  Methodologies for Measuring Subjective SNR ImprovementWord-p. 35
E  Methodology for NS performance evaluation by Objective MeansWord-p. 38
F  Methodology for Measuring Impact on Voice Activity Factor (VAF)Word-p. 43
G  Change historyWord-p. 47

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