Implementation of CTC in pure theano with custom gradient#108

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nlgranger wants to merge 8 commits into

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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
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Commits on Dec 15, 2017

Commits on Jan 8, 2018

Improved ctc gradient stability
nlgranger
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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
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Commits on Jan 24, 2018

fixed error in logsumexp, ctc gradient is now equal to tensorflow's
nlgranger
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Commits on Jun 24, 2018

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