Test sequences for the GSM-EFR speech codec using the 
Adaptive Multi-Rate (AMR) speech codec mode MR122 (GSM 06.74)
=========================================================================

These test sequences correspond to AMR C code (GSM 06.73) version 7.4.0


Input test sequences:
---------------------

  all input sequences are identical to the AMR input test sequences *.inp.

 
Speech codec test sequences; PC Byte format:
--------------------------------------------

  with DTX disabled
             t00.inp ... t22.inp (encoder input, from GSM 06.74)
             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 GSM 06.74)
             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 GSM 06.74)
             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 *.cod file format is identical to the GSM_EFR *.cod file format, that is:
     244 Data Bits, VadFlag, SpFlag -> 246 Words per frame (20ms)

  The *.dec file format is identical to the GSM_EFR *.dec file format, that is:
     Bfi, 244 Data Bits, Sid, Taf -> 247 Words per frame (20ms)

  The *.dec files can be built from the *.cod files with the GSM_EFR executable
  ed_iface


Differences to AMR Mode MR122:
------------------------------

the testsequences differ in two parts from the AMR Mode 12.2 testsequences:

- 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)

       

A detailed description of all sequences can be found in GSM 06.74.
