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

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

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