Fix swbd segmentation

egs/swbd/s5c/conf/mfcc_hires_bp.conf

@@ -0,0 +1,13 @@
+# config for high-resolution MFCC features, intended for speech activity detection.
+# This differs from conf/mfcc_hires.conf, since it is bandlimited between
+# 330 Hz and 3000 Hz, the frequencies corresponding to the telephone 
+# bandwidth.
+# 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.
+--sample-frequency=8000 # Babel is sampled at 8kHz
+--num-mel-bins=28 
+--num-ceps=28 # there is no dimensionality reduction.
+--low-freq=330 # low cutoff frequency for mel bins
+--high-freq=3000 # high cutoff frequency