[src] Fix potential underflow bug in MFCC, RE energy floor, thx: Zolt…

…an Tobler (#3347)
kaldi-asr · May 28, 2019 · 8c6cd31 · 8c6cd31
1 parent a5dd6bd
commit 8c6cd31
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/feat/feature-mfcc.cc b/src/feat/feature-mfcc.cc
@@ -36,7 +36,7 @@ void MfccComputer::Compute(BaseFloat signal_log_energy,
 
   if (opts_.use_energy && !opts_.raw_energy)
     signal_log_energy = Log(std::max<BaseFloat>(VecVec(*signal_frame, *signal_frame),
-                                     std::numeric_limits<float>::min()));
+                                     std::numeric_limits<float>::epsilon()));
 
   if (srfft_ != NULL)  // Compute FFT using the split-radix algorithm.
     srfft_->Compute(signal_frame->Data(), true);