10 Alternative Enhanced Full Rate implementation using the Adaptive Multi Rate 12.2 kbit/s mode
3GPP46.054Release 17Test sequences for the GSM Enhanced Full Rate (EFR) speech codecTS
The 12.2 kbit/s mode of the Adaptive Multi Rate speech coder described in TS 26.071 is functionally equivalent to the GSM Enhanced Full Rate speech coder. An alternative implementation of the Enhanced Full Rate speech service based on the 12.2 kbit/s mode of the Adaptive Multi Rate coder is allowed. Alternative implementations shall implement the functionality specified in TS 26.071 for the 12.2 kbit/s mode, with the difference that the DTX transmission format from GSM 06.81, the comfort noise generation from GSM 06.62 and the decoder homing frame from GSM 06.60 shall be used.
The test sequences are derived from the corresponding AMR test sequences. The modifications that were made and the use of the respective sequences are described below. The input sequences are identical to the AMR test input sequences *.inp.
Speech codec test sequences
- with DTX disabled
t00.inp … t22.inp (encoder input, from TS 26.074)
t00_efr.cod … t22_efr.cod (encoder output)
t00_efr.dec … t22_efr.dec (decoder input)
t00_efr.out … t22_efr.out (decoder output)
- with DTX enabled, VAD option 1
Dtx1.inp … Dtx4.inp (encoder input, from TS 26.074)
Dtx1_efr.cod … Dtx4_efr.cod (encoder output)
Dtx1_efr.dec … Dtx4_efr.dec (decoder input)
Dtx1_efr.out … Dtx4_efr.out (decoder output)
- with DTX enabled, VAD option 2
Dt21.inp …. Dt24.inp (encoder input, from TS 26.074)
Dt21_efr.cod … Dt24_efr.cod (encoder output)
Dt21_efr.dec … Dt24_efr.dec (decoder input)
Dt21_efr.out … Dt24_efr.out (decoder output)
The format of the *.cod files is identical to the GSM_EFR *.cod file format (244 Data Bits, VadFlag, SpFlag equaling 246 Words per 20ms frame). The format of the *.dec files is identical to the GSM_EFR *.dec file format, that is (Bfi, 244 Data Bits, Sid, Taf equaling 247 Words per frame (20ms).
In summary, the differences to the AMR Mode MR122 test sequences are:
- DTX handling (VadFlag and SpFlag instead of TxType; different SID frames)
- Decoder homing frame (Decoder homing frame for GSM_EFR is different than for AMR MR122).
Annex A (informative):
Change History
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Change history |
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SMG No. |
TDoc. No. |
CR. No. |
Section affected |
New version |
Subject/Comments |
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SMG#23 |
4.0.1 |
ETSI Publication |
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SMG#23 |
5.1.0 |
Release 1996 version |
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SMG#27 |
6.0.0 |
Release 1997 version |
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SMG#29 |
7.0.0 |
Release 1998 version |
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7.0.1 |
Version update to 7.0.1 for Publication |
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SMG#31 |
8.0.0 |
Release 1999 version |
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SMG#32 |
P-00-274 |
A006 |
4 and new 10 |
8.1.0 |
Alternative EFR implementation using the AMR 12.2 mode |
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Change history |
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Date |
TSG SA# |
TSG Doc. |
CR |
Rev |
Subject/Comment |
Old |
New |
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12-2000 |
10 |
SP-000573 |
A011 |
Correction to the test vectors of the alternative EFR version |
8.1.0 |
8.2.0 |
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03-2001 |
11 |
Version for Release 4 |
4.0.0 |
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06-2002 |
16 |
Version for Release 5 |
4.0.0 |
5.0.0 |
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12-2004 |
26 |
Version for Rejlease 6 |
5.0.0 |
6.0.0 |
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06-2007 |
36 |
Version for Release 7 |
6.0.0 |
7.0.0 |
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12-2008 |
42 |
Version for Release 8 |
7.0.0 |
8.0.0 |
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12-2009 |
46 |
Version for Release 9 |
8.0.0 |
9.0.0 |
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03-2011 |
51 |
Version for Release 10 |
9.0.0 |
10.0.0 |
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09-2012 |
57 |
Version for Release 11 |
10.0.0 |
11.0.0 |
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09-2014 |
65 |
Version for Release 12 |
11.0.0 |
12.0.0 |
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12-2015 |
70 |
Version for Release 13 |
12.0.0 |
13.0.0 |
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Change history |
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Date |
Meeting |
TDoc |
CR |
Rev |
Cat |
Subject/Comment |
New version |
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03-2017 |
SA#75 |
Version for Release 14 |
14.0.0 |
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06-2018 |
SA#80 |
Version for Release 15 |
15.0.0 |
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2020-07 |
– |
– |
– |
– |
– |
Update to Rel-16 version (MCC) |
16.0.0 |
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2022-04 |
– |
– |
– |
– |
– |
Update to Rel-17 version (MCC) |
17.0.0 |