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Caroline Chen authored
Summary: Add support for CTC lexicon decoder without LM support by adding a non language model `ZeroLM` that returns score 0 for everything. Generalize the decoder class/API a bit to support this, adding it as an option for the kenlm decoder at the moment (will likely be separated out from kenlm when adding support for other kinds of LMs in the future) Pull Request resolved: https://github.com/pytorch/audio/pull/2174 Reviewed By: hwangjeff, nateanl Differential Revision: D33798674 Pulled By: carolineechen fbshipit-source-id: ef8265f1d046011b143597b3b7c691566b08dcde
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