The IBM 2015 English Conversational Telephone Speech Recognition System
Table 4: Comparison of word error rates for CE and sequence trained unfolded RNN and DNN with score fusion and joint modeling on Hub5’00. The WERs for the joint models are after sequence training.
['RNN/CNN combination', 'WER SWB', 'WER CH']
Two experimental scenarios were considered. The first is where the joint model was initialized with the fusion of the cross-entropy trained RNN and CNN whereas the second uses ST models as the starting point.