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3GPP (SA4)
TR 06.78














Results of the AMR noise suppression selection phase

(P) GSM Rel-99 v8.0.1    2003/03    48 p.

Rapporteur:  USAI, Paolino
Descendant(s):  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).

1   Scope   PDF-p. 6
2   References
3   Definitions and abbreviations
4   General   PDF-p. 8
5   Minimum Performance Requirements   PDF-p. 10
6   Comparison of Candidates by Subjective Means      Up
7   Selection Phase Listening Tests and Results   PDF-p. 11
8   Design Constraints   PDF-p. 26      Up
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 AMR   PDF-p. 28
A   Key Selection Phase Documents   PDF-p. 29
B   Selection Phase Test Plan   PDF-p. 30
C   Global Analysis Spreadsheet   PDF-p. 31
D   Methodologies for Measuring Subjective SNR Improvement   PDF-p. 32
E   Methodology for NS performance evaluation by Objective Means   PDF-p. 35      Up
F   Methodology for Measuring Impact on Voice Activity Factor (VAF)   PDF-p. 41
G   Change history   PDF-p. 46