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egs/librispeech/s5/conf/mfcc_hires.conf 670 Bytes
8dcb6dfcb   Yannick Estève   first commit
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  # config for high-resolution MFCC features, intended for neural network training
  # Note: we keep all cepstra, so it has the same info as filterbank features,
  # but MFCC is more easily compressible (because less correlated) which is why 
  # we prefer this method.
  --use-energy=false   # use average of log energy, not energy.
  --num-mel-bins=40     # similar to Google's setup.
  --num-ceps=40     # there is no dimensionality reduction.
  --low-freq=20     # low cutoff frequency for mel bins... this is high-bandwidth data, so
                    # there might be some information at the low end.
  --high-freq=-400 # high cutoff frequently, relative to Nyquist of 8000 (=7600)