Output sequence probability with CTC beam search, optional multiple output sequences (#21927)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/21927
Add `OUTPUT_PROB` output to CTCBeamSearchDecoderOp to return a probability for each sequence.
Add argument to output top-k instead of top-1 decoded sequences.
Reviewed By: SuperIRabbit
Differential Revision: D15797371
fbshipit-source-id: 737ca5cc4f90a0bcc3660ac9f58519a175977b69
