Bayes risk CTC: Controllable CTC alignment in Sequence-to-Sequence tasks. (arXiv:2210.07499v1 [cs.CL])

Sequence-to-Sequence (seq2seq) tasks transcribe the input sequence to a
target sequence. The Connectionist Temporal Classification (CTC) criterion is
widely used in multiple seq2seq tasks. Besides predicting the target sequence,
a side product of CTC is to predict the alignment, which is the most probable
input-long sequence that specifies a hard aligning relationship between the
input and target units. As there are multiple potential aligning sequences
(called paths) that are equally considered in CTC formulation, the choice of
which path will …

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