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Table 5 Impairment factor values for WB and NB speech codecs, derived on the basis of WB-PESQ estimations. Values in the last column have been calculated according to (10) using the defined values of ITU-T Rec. G.113 [10].

From: Instrumental Estimation of E-Model Parameters for Wideband Speech Codecs

Band. Codec Bit-rate Database no. Average Expected
   (kbit/s) 1 2 3 4 5 7   from G.113
WB Clean
  G.722
  G.722
  G.722
  G.722.1
  G.722.1
  G.722.2
  G.722.2
  G.722.2
  G.722.2
  G.722.2
  G.722.2
  G.722.2
  G.722.2
  G.722.2
  G.729EV  
  G.729EV  
NB G.711
  G.726
  G.726
  G.726
  G.728
  G.729
  GSM-EFR
  GSM-FR
  1. G.729EV refers to the prepublished version of the ITU-T Rec. G.729.1 [7] standard.