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Table 2 Pearson correlation coefficients and root mean square prediction errors between the auditory and the estimated MOS for Databases 1–5 and 7, using different WB signal-based models. These measures are computed after third-order mapping.

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

Database No. of stimuli WB-PESQ TOSQA-2001 Mod. WB-PESQ
   NB WB
1   100 44 0.93 0.36 0.91 0.40 0.93 0.34
   NB only   0.97 0.29 0.90 0.41 0.98 0.28
2   36 36 0.83 0.49 0.78 0.55 0.83 0.49
   NB only   0.75 0.47 0.77 0.44 0.65 0.49
3   112 392 0.97 0.23 0.92 0.35 0.96 0.24
   NB only   0.94 0.24 0.69 0.37 0.95 0.19
4   96 1288 0.90 0.29 0.88 0.31 0.92 0.25
   NB only   0.88 0.43 0.83 0.41 0.90 0.25
5   360 360 0.93 0.35 0.88 0.46 0.97 0.23
   NB only   0.93 0.37 0.78 0.48 0.95 0.26
7 AA 0 336 0.94 0.30     
  AC 0 336 0.95 0.30     
  BB 0 336 0.97 0.19     
  BD 0 336 0.97 0.19     
  CC 0 336 0.93 0.33     
  CE 0 336 0.89 0.44     
  DD 0 336 0.97 0.18     
  DA 0 336 0.97 0.19     
  EE 0 336 0.83 0.56     
  EB 0 336 0.87 0.51     
  1. Database 7: Letters specify the combination of the test laboratory (A–E, first letter) and the tested candidate codec (A–E, second letter).