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TR 06.08 (SA4)
Half Rate Speech – Performance Characterization of the GSM Half Rate speech codec

ToC   3GPP‑Page   ETSI‑search   Help    
(P) GSM Rel-99 v8.0.0  2000/02  25 p.
(P) GSM Rel-98 v7.0.0  1999/06  24 p.
(P) GSM Rel-97 v6.0.0  1998/10  24 p.
(W-zip) GSM Rel-96 v5.0.0  1996/10  22 p.

Rapporteur:  USAI, Paolino
Descendant:  TS 46.008

This TR gives background information on the performance of the GSM half rate speech codec. Experimental results from the characterization and verification tests carried out during the selection process by the Traffic CHannel Half rate Speech (TCH-HS) expert group are reported to give a more detailed picture of the behaviour of the GSM half rate speech codec under different conditions of operation.


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1  ScopePDF-p. 8
2  References
3  Abbreviations
4  Quality under error conditions (A-law, IRS), Experiment 1PDF-p. 9
5  Quality under error conditions (UPCM, No IRS), Experiment 2
6  Quality under tandeming conditionsPDF-p. 10
7  Quality under background noise conditionsPDF-p. 11
8  Assessment of equivalent qdu, Experiment 6PDF-p. 13
9  Talker dependency, Experiment 8
10  DTX System
11  Performance with DTMF tonesPDF-p. 15
12  Performance with signalling tonesUp
13  DelayPDF-p. 17
14  Frequency response
15  Half Rate codec complexityPDF-p. 19
16  Summary of results from characterization Phase 1 and 2
A  BibliographyPDF-p. 23
B  Change Request HistoryPDF-p. 24

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