Zhi-Jie YanQiang HuoJian Xu 0006Yu Zhang 0007Tied-state based discriminative training of context-expanded region-dependent feature transforms for LVCSR.6940-69442013ICASSPhttps://doi.org/10.1109/ICASSP.2013.6639007conf/icassp/2013db/conf/icassp/icassp2013.html#YanHXZ13