Fangjun Kuang 3ec219dfa0
Add stateless transducer tutorial. (#235)
* WIP: Add stateless transducer tutorial.

* Add more doc.

* Minor fixes.
2022-03-03 22:33:47 +08:00

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# Introduction
Please refer to <https://icefall.readthedocs.io/en/latest/recipes/librispeech/index.html>
for how to run models in this recipe.
# Transducers
There are various folders containing the name `transducer` in this folder.
The following table lists the differences among them.
| | Encoder | Decoder | Comment |
|---------------------------------------|-----------|--------------------|---------------------------------------------------|
| `transducer` | Conformer | LSTM | |
| `transducer_stateless` | Conformer | Embedding + Conv1d | |
| `transducer_lstm` | LSTM | LSTM | |
| `transducer_stateless_multi_datasets` | Conformer | Embedding + Conv1d | Using data from GigaSpeech as extra training data |
The decoder in `transducer_stateless` is modified from the paper
[Rnn-Transducer with Stateless Prediction Network](https://ieeexplore.ieee.org/document/9054419/).
We place an additional Conv1d layer right after the input embedding layer.