LM on Parakeet models

[jinmingteo]

Hi team,

I am trying to add LM into parakeet models and i think this is the script related to it.

eval_beamsearch_ngram_transducer.py

I have tried using it and encountered a couple of issues with EncDecRNNTBPEModel. For example, there are 3 outputs in forward function now.
Is there other scripts that i should be looking into?

Thanks

[titu1994]

For transducer, there were always 3 outputs in forward because it's just end encoder forward. During decoding we take those encoder outputs and pass them auto regressively to the decoder and joint.

For beam search support, @karpnv