ESPnet2

• [ESPnet2] Solve memory issue with super large corpus training #1972 by @kamo-naoyuki
• [ESPnet2] Added model parameter count to trainer #1867 by @SeanNaren
• [ESPnet2] Refactoring espnet2/utils/fileio.py -> espnet2/fileio #1807 by @kamo-naoyuki

New Features

• [New Features] Lightweight and Dynamic Convolutions. #1599 by @yuyfujit
• [New Features] Implement Ngram scorer #1946 by @qmpzzpmq
• [New Features] resampling in utils/compute-fbank-feats.py and utils/compute-stft-feats.py #2035 by @kamo-naoyuki

Enhancement

• [Enhancement] Ngram scorer update #1992 by @qmpzzpmq

Documentation

• [Documentation] fix a typo for the decoder add_argument_group #2030 by @sw005320
• [Documentation] Update multiple GPU descriptions. #2016 by @sw005320
• [Documentation] Finetuning doc + freezing parameters option #1897 by @b-flo

Bugfix

• [Bugfix] Fix memory issue when resuming #2040 by @kamo-naoyuki
• [Bugfix] fixed typo in cmvn.py #1988 by @gullyboy007
• [Bugfix] update notebook #1986 by @ShigekiKarita
• [Bugfix] Fix freezing modules (when using multi-gpu) #1983 by @atozto9
• [Bugfix] Fix BLEU/PPL calculation during training #2009 by @hirofumi0810
• [Bugfix] Fix download file extension #2042 by @takenori-y
• [Bugfix] fix tedlium2/3 model link #2032 by @sw005320
• [Bugfix] Fix bug for pure Transformer-CTC #2023 by @hirofumi0810
• [Bugfix] li42 recipe: add li42 results; fix bug in adding language id "zh_TW" #1950 by @houwenxin

CI

• [CI] Add espnet2 in ci/doc.sh #1976 by @ShigekiKarita
• [CI] Add test for pytorch1.5 #1881 by @kamo-naoyuki

Acknowledgements

Special thanks to @SeanNaren, @ShigekiKarita, @atozto9, @b-flo, @gullyboy007, @hirofumi0810, @houwenxin, @kamo-naoyuki, @qmpzzpmq, @sw005320, @takenori-y, @yuyfujit.