Worse performance with language model

[jafioti]

I am trying to use the KenLM language model to improve my results, but every time I try to use it, it outputs garbage output. Since the alpha is supposed to weight the LM, I tried setting it lower, but even at 0 it still outputs garbage. The only way I can get it to behave is by removing the LM path. Shouldn't the output be identical with and without the LM if alpha is set to 0?

Here is the decoder initialization:
decoder = CTCBeamDecoder(labels="".join([local_vocab.index2word[i][0] for i in range(local_vocab.num_words)]), model_path="test.arpa", alpha=0.5, beta=0.9, beam_width=100, blank_id=local_vocab.num_words - 1)

Here is the usage:
beam_results, beam_scores, timesteps, out_lens = decoder.decode(F.softmax(output, dim=-1).transpose(0, 1))

Is this expected behavior?

[2000ZRL]

I met the same problem. It also seems that the token must be one-character.

[Yushi-Hu]

Same problem here

[Sologa]

It seems that #31 has not been solved. My workaround is to replace my lm training file's tokens with Chinese characters.

[Jatin-WIAI]

@jafioti were you able to solve the issue?