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TR 06.78 (SA4)
Results of the AMR noise suppression selection phase

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(P) GSM Rel-99 v8.0.1  2003/03  48 p.

Rapporteur:  USAI, Paolino
Descendant:  TR 26.978

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).


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1  ScopePDF-p. 6
2  References
3  Definitions and abbreviations
4  GeneralPDF-p. 8
5  Minimum Performance RequirementsPDF-p. 10
6  Comparison of Candidates by Subjective MeansUp
7  Selection Phase Listening Tests and ResultsPDF-p. 11
8  Design ConstraintsPDF-p. 26Up
9  Impact on Voice Activity Factor VAF (with VAD/DTX active)PDF-p. 27
10  Objective Performance Measurements
11  Feasibility Study: Downlink Noise Suppression for AMRPDF-p. 28
A  Key Selection Phase DocumentsPDF-p. 29
B  Selection Phase Test PlanPDF-p. 30
C  Global Analysis SpreadsheetPDF-p. 31
D  Methodologies for Measuring Subjective SNR ImprovementPDF-p. 32
E  Methodology for NS performance evaluation by Objective MeansPDF-p. 35Up
F  Methodology for Measuring Impact on Voice Activity Factor (VAF)PDF-p. 41
G  Change historyPDF-p. 46

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