---
language: id
license: apache-2.0
tags:
  - icefall
  - phoneme-recognition
  - automatic-speech-recognition
datasets:
  - mozilla-foundation/common_voice_13_0
  - indonesian-nlp/librivox-indonesia
  - google/fleurs
---

# Pruned Stateless Zipformer RNN-T Streaming ID

Pruned Stateless Zipformer RNN-T Streaming ID is an automatic speech recognition model trained on the following datasets:

- [Common Voice ID](https://huggingface.co/datasets/mozilla-foundation/common_voice_13_0)
- [LibriVox Indonesia](https://huggingface.co/datasets/indonesian-nlp/librivox-indonesia)
- [FLEURS ID](https://huggingface.co/datasets/google/fleurs)

Instead of being trained to predict sequences of words, this model was trained to predict sequence of phonemes, e.g. `['p', 'ə', 'r', 'b', 'u', 'a', 't', 'a', 'n', 'ɲ', 'a']`. Therefore, the model's [vocabulary](https://huggingface.co/bookbot/pruned-transducer-stateless7-streaming-id/blob/main/data/lang_phone/tokens.txt) contains the different IPA phonemes found in [g2p ID](https://github.com/bookbot-kids/g2p_id).

This model was trained using [icefall](https://github.com/k2-fsa/icefall) framework. All training was done on a Google Cloud Engine VM with a Tesla A100 GPU. All necessary scripts used for training could be found in the [Files and versions](https://huggingface.co/bookbot/pruned-transducer-stateless7-streaming-id/tree/main) tab, as well as the [Training metrics](https://huggingface.co/bookbot/pruned-transducer-stateless7-streaming-id/tensorboard) logged via Tensorboard.

## Evaluation Results

### Simulated Streaming

```sh
for m in greedy_search fast_beam_search modified_beam_search; do
  ./pruned_transducer_stateless7_streaming/decode.py \
    --epoch 30 \
    --avg 9 \
    --exp-dir ./pruned_transducer_stateless7_streaming/exp \
    --max-duration 600 \
    --decode-chunk-len 32 \
    --decoding-method $m
done
```

The model achieves the following phoneme error rates on the different test sets:

| Decoding             | LibriVox | FLEURS | Common Voice |
| -------------------- | :------: | :----: | :----------: |
| Greedy Search        |  4.87%   | 11.45% |    14.97%    |
| Modified Beam Search |  4.71%   | 11.25% |    14.31%    |
| Fast Beam Search     |  4.85%   | 12.55% |    14.89%    |

### Chunk-wise Streaming

```sh
for m in greedy_search fast_beam_search modified_beam_search; do
  ./pruned_transducer_stateless7_streaming/streaming_decode.py \
    --epoch 30 \
    --avg 9 \
    --exp-dir ./pruned_transducer_stateless7_streaming/exp \
    --decoding-method $m \
    --decode-chunk-len 32 \
    --num-decode-streams 1500
done
```

The model achieves the following phoneme error rates on the different test sets:

| Decoding             | LibriVox | FLEURS | Common Voice |
| -------------------- | :------: | :----: | :----------: |
| Greedy Search        |  5.12%   | 12.74% |    15.78%    |
| Modified Beam Search |  4.78%   | 11.83% |    14.54%    |
| Fast Beam Search     |  4.81%   | 12.93% |    14.96%    |

## Usage

### Download Pre-trained Model

```sh
cd egs/bookbot/ASR
mkdir tmp
cd tmp
git lfs install
git clone https://huggingface.co/bookbot/pruned-transducer-stateless7-streaming-id
```

### Inference

To decode with greedy search, run:

```sh
./pruned_transducer_stateless7_streaming/jit_pretrained.py \
  --nn-model-filename ./tmp/pruned-transducer-stateless7-streaming-id/exp/cpu_jit.pt \
  --lang-dir ./tmp/pruned-transducer-stateless7-streaming-id/data/lang_phone \
  ./tmp/pruned-transducer-stateless7-streaming-id/test_waves/sample1.wav
```

<details>
<summary>Decoding Output</summary>

```
2023-06-21 10:19:18,563 INFO [jit_pretrained.py:217] device: cpu
2023-06-21 10:19:19,231 INFO [lexicon.py:168] Loading pre-compiled tmp/pruned-transducer-stateless7-streaming-id/data/lang_phone/Linv.pt
2023-06-21 10:19:19,232 INFO [jit_pretrained.py:228] Constructing Fbank computer
2023-06-21 10:19:19,233 INFO [jit_pretrained.py:238] Reading sound files: ['./tmp/pruned-transducer-stateless7-streaming-id/test_waves/sample1.wav']
2023-06-21 10:19:19,234 INFO [jit_pretrained.py:244] Decoding started
2023-06-21 10:19:20,090 INFO [jit_pretrained.py:271] 
./tmp/pruned-transducer-stateless7-streaming-id/test_waves/sample1.wav:
p u l a ŋ | s ə k o l a h | p i t ə r i | s a ŋ a t | l a p a r


2023-06-21 10:19:20,090 INFO [jit_pretrained.py:273] Decoding Done
```

</details>

## Training procedure

### Install icefall

```sh
git clone https://github.com/bookbot-hive/icefall
cd icefall
export PYTHONPATH=`pwd`:$PYTHONPATH
```

### Prepare Data

```sh
cd egs/bookbot_id/ASR
./prepare.sh
```

### Train

```sh
export CUDA_VISIBLE_DEVICES="0"
./pruned_transducer_stateless7_streaming/train.py \
  --num-epochs 30 \
  --use-fp16 1 \
  --max-duration 400
```

## Frameworks

- [k2](https://github.com/k2-fsa/k2)
- [icefall](https://github.com/bookbot-hive/icefall)
- [lhotse](https://github.com/bookbot-hive/lhotse)