Implementation of CTC in pure theano with custom gradient#108

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nlgranger wants to merge 8 commits intoLasagne:masterfrom

nlgranger:connectionist_temporal_classification

Commits on Aug 26, 2017

Implementation of CTC in pure theano with custom gradient (which should hopefully be more robust to precision issues)
nlgranger
committed

Commits on Dec 15, 2017

Commits on Jan 8, 2018

Improved ctc gradient stability
nlgranger
committed

Commits on Jan 9, 2018

test for more stability in computations
nlgranger
committed

Commits on Jan 12, 2018

fixes errors and precision issues, adds demos and tests.
nlgranger
committed

Commits on Jan 24, 2018

fixed error in logsumexp, ctc gradient is now equal to tensorflow's
nlgranger
committed

Commits on Jun 24, 2018

split ctc op in two to avoid redundant computation: no improvement though...
nlgranger
committed