·10x
 CHMM system available (thanks to P-!!!)
 ·With
 lextree implementation, only about 1-2% of total HMMs active per
 frame
 ·Order
 of magnitude fewer compared to flat lexicon search
 ·Lextree
 replication improves WER noticeably
 ·Absolute
 pruning parameters improve worst-case behavior significantly, without penalizing
 accuracy
 ·When active search space grows beyond some
 threshold, no hope of correct recognition anyway