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Fujimoto Seiji c1ce7ca9e3 Add first cut at ReazonSpeech recipe

This recipe is mostly based on egs/csj, but tweaked to the point that
can be run with ReazonSpeech corpus.

That being said, there are some big caveats:

 * Currently the model quality is not very good. Actually, it is very
   bad. I trained a model with 1000h corpus, and it resulted in >80%
   CER on JSUT.

 * The core issue seems that Zipformer is prone to ignore untterances
   as sielent segments. It often produces an empty hypothesis despite
   that the audio actually contains human voice.

 * This issue is already reported in the upstream and not fully
   resolved yet as of Dec 2023.

Signed-off-by: Fujimoto Seiji <fujimoto@ceptord.net>

2023-12-18 16:12:11 +09:00

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