Discriminative training of HMM based speech recognizer with gradient projection method.

Qiang Huo Chorkin Chan Discriminative training of HMM based speech recognizer with gradient projection method. 1995 EUROSPEECH https://doi.org/10.21437/Eurospeech.1995-25 conf/interspeech/1995 db/conf/interspeech/eurospeech1995.html#HuoC95 101-104