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TR 06.55 (SA4)
Performance characterisation of the GSM EFR Speech Codec

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(P) GSM Rel-99 v8.0.0    2000/02    14 p.
(P) GSM Rel-98 v7.0.0    1999/06    14 p.
(P) GSM Rel-97 v6.0.0    1998/10    14 p.
(W-zip) GSM Rel-96 v5.0.0    1996/06    15 p.
(P) GSM Phase-2 v4.0.0    1997/06    13 p.

Rapporteur:  USAI, Paolino
Descendant(s):  TR 46.055    

This TR gives background information on the performance of the GSM enhanced full rate speech codec. Experimental results from the Pre-selection and Verification tests carried out during the standardization process by the SEG (Speech Expert Group) are reported to give a more detailed picture of the behaviour of the GSM enhanced full 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 (EP0 - EP3) and tandeming conditions (Exp Number 1 and Exp Number 5)   PDF-p. 9
5   Quality under background noise conditions (Exp Number 2 and Exp Number 3)   PDF-p. 10
6   Talker dependency (Exp Number 4)
7   DTX system
8   Performance with DTMF tones
9   Network information tones   PDF-p. 13
10   Performance with special input signals   PDF-p. 14
11   Performance with different languages   PDF-p. 15
12   Delay   PDF-p. 16
13   Frequency response   PDF-p. 18
14   Complexity
15   Summary of the results from the subjective testing   PDF-p. 20
A   Summary of results (lab by lab)   PDF-p. 22
B   Change Request History   PDF-p. 29

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