Please refer to https://icefall.readthedocs.io/en/latest/recipes/aishell/index.html for how to run models in this recipe.
There are various folders containing the name transducer in this folder.
The following table lists the differences among them.
| Encoder | Decoder | Comment | |
|---|---|---|---|
transducer_stateless |
Conformer | Embedding + Conv1d | with k2.rnnt_loss |
transducer_stateless_modified |
Conformer | Embedding + Conv1d | with modified transducer from optimized_transducer |
transducer_stateless_modified-2 |
Conformer | Embedding + Conv1d | with modified transducer from optimized_transducer + extra data |
The decoder in transducer_stateless is modified from the paper
Rnn-Transducer with Stateless Prediction Network.
We place an additional Conv1d layer right after the input embedding layer.