GitLab

Summary:
Move CTC beam search decoder out of prototype to new `torchaudio.models.decoder` module.

hwangjeff mthrok any thoughts on the new module + naming, and if we should move rnnt beam search here as well??

Pull Request resolved: https://github.com/pytorch/audio/pull/2410

Reviewed By: mthrok

Differential Revision: D36784521

Pulled By: carolineechen

fbshipit-source-id: a2ec52f86bba66e03327a9af0c5df8bbefcd67ed

Summary:
Add support for lexicon free decoding based on [fairseq's](https://github.com/pytorch/fairseq/blob/main/examples/speech_recognition/new/decoders/flashlight_decoder.py#L53) implementation. Reached numerical parity with fairseq's decoder in offline experimentation

Follow ups
- Add pretrained LM support for lex free decoding
- Add example in tutorial
- Replace flashlight C++ source code with flashlight text submodule
- [optional] fairseq compatibility test

Pull Request resolved: https://github.com/pytorch/audio/pull/2342

Reviewed By: nateanl

Differential Revision: D35856104

Pulled By: carolineechen

fbshipit-source-id: b64286550984df906ebb747e82f6fb1f21948ac7

Summary:
add function to download pretrained files for LibriSpeech 3-gram/4-gram KenLM, tests, and updated tutorial

Pull Request resolved: https://github.com/pytorch/audio/pull/2275

Reviewed By: mthrok

Differential Revision: D35115418

Pulled By: carolineechen

fbshipit-source-id: 83ff22380fce9c753bb4a7b7e3d89aa66c2831c0