LibriSpeech test-clean
Word Error Rate (WER)
LAS (no LM)
Speech Recognition
3.2
LibriSpeech test-other
Word Error Rate (WER)
LAS (no LM)
Speech Recognition
7.7
LibriSpeech test-clean
Word Error Rate (WER)
LAS (no LM)
Speech Recognition
2.7
LibriSpeech test-other
Word Error Rate (WER)
LAS (no LM)
Speech Recognition
6.5
LibriSpeech test-clean
Word Error Rate (WER)
LAS + SpecAugment 
Speech Recognition
2.5
LibriSpeech test-other
Word Error Rate (WER)
LAS + SpecAugment
Speech Recognition
5.8
Hub5'00 SwitchBoard
SwitchBoard
LAS + SpecAugment (with LM, Switchboard mild policy)
Speech Recognition
6.8
Hub5'00 SwitchBoard
CallHome
LAS + SpecAugment (with LM, Switchboard strong policy)
Speech Recognition
14