Create README.md

README.md

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+---
+language: pt
+datasets:
+- common_voice 
+- mls
+- cetuc
+- lapsbm
+- voxforge
+- tedx
+- sid
+metrics:
+- wer
+tags:
+- audio
+- speech
+- wav2vec2
+- pt
+- portuguese-speech-corpus
+- automatic-speech-recognition
+- speech
+- PyTorch
+license: apache-2.0
+---
+
+# bp500-xlsr: Wav2vec 2.0 with Brazilian Portuguese (BP) Dataset
+
+This is a the demonstration of a fine-tuned Wav2vec model for Brazilian Portuguese using the following datasets:
+
+- [CETUC](http://www02.smt.ufrj.br/~igor.quintanilha/alcaim.tar.gz): contains approximately 145 hours of Brazilian Portuguese speech distributed among 50 male and 50 female speakers, each pronouncing approximately 1,000 phonetically balanced sentences selected from the [CETEN-Folha](https://www.linguateca.pt/cetenfolha/) corpus;
+- [Common Voice 7.0](https://commonvoice.mozilla.org/pt):  is a project proposed by Mozilla Foundation with the goal to create a wide open dataset in different languages. In this project, volunteers donate and validate speech using the [oficial site](https://commonvoice.mozilla.org/pt);
+- [Lapsbm](https://github.com/falabrasil/gitlab-resources): "Falabrasil - UFPA" is a dataset used by the Fala Brasil group to benchmark ASR systems in Brazilian Portuguese. Contains 35 speakers (10 females), each one pronouncing 20 unique sentences, totalling  700 utterances in Brazilian Portuguese. The audios were recorded in 22.05 kHz without environment control;
+- [Multilingual Librispeech (MLS)](https://arxiv.org/abs/2012.03411): a massive dataset available in many languages. The MLS is based on audiobook recordings in public domain like [LibriVox](https://librivox.org/). The dataset contains a total of 6k hours of transcribed data in many languages. The set in Portuguese [used in this work](http://www.openslr.org/94/) (mostly Brazilian variant) has approximately 284 hours of speech, obtained from 55 audiobooks read by 62 speakers;
+- [VoxForge](http://www.voxforge.org/): is a project with the goal to build open datasets for acoustic models. The corpus contains approximately 100 speakers and 4,130 utterances of Brazilian Portuguese, with sample rates varying from 16kHz to 44.1kHz.
+
+These datasets were combined to build a larger Brazilian Portuguese dataset. All data was used for training except Common Voice dev/test sets, that were used for validation/test respectively. We also made test sets for all the gathered datasets.
+
+| Dataset                        |  Train | Valid |  Test |
+|--------------------------------|-------:|------:|------:|
+| CETUC                          |  93.9h |    -- |  5.4h |
+| Common Voice                   |  37.6h |  8.9h |  9.5h |
+| LaPS BM                        |   0.8h |    -- |  0.1h |
+| MLS                            | 161.0h |    -- |  3.7h |
+| Multilingual TEDx (Portuguese) | 144.2h |    -- |  1.8h |
+| SID                            |   5.0h |    -- |  1.0h |
+| VoxForge                       |   2.8h |    -- |  0.1h |
+| Total                          | 437.2h |  8.9h | 21.6h |
+
+The original model was fine-tuned using [fairseq](https://github.com/pytorch/fairseq). This notebook uses a converted version of the original one. The link to the original fairseq model is available [here](https://drive.google.com/file/d/1J8aR1ltDLQFe-dVrGuyxoRm2uyJjCWgf/view?usp=sharing).
+
+#### Summary
+
+|  | CETUC          | CV             | LaPS           | MLS            | SID            | TEDx           | VF             | AVG            |
+|----------------------|---------------|----------------|----------------|----------------|----------------|----------------|----------------|----------------|
+| bp\_500 (demonstration below)              | 0.051 | 0.136 | 0.032 | 0.118 | 0.095 | 0.248 | 0.082 | 0.108 |
+| bp\_500 + 4-gram (demonstration below)       | 0.032 | 0.097 | 0.022 | 0.114 | 0.125 | 0.246 | 0.065 | 0.100 |
+
+#### Transcription examples
+
+| Text                                                                                                       | Transcription                                                                                                |
+|------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------|
+|não há um departamento de mediadores independente das federações e das agremiações|não há um **dearamento** de mediadores independente das federações e das **agrebiações**|
+|mas que bodega|**masque** bodega|
+|a cortina abriu o show começou|a cortina abriu o **chô** começou|
+|por sorte havia uma passadeira|**busote avinhoa** **passadeiro**|
+|estou maravilhada está tudo pronto|**stou** estou maravilhada está tudo pronto|
+
+
+## Demonstration
+
+
+```python
+MODEL_NAME = "lgris/bp500-xlsr" 
+```
+
+### Imports and dependencies
+
+
+```python
+%%capture
+!pip install torch==1.8.2+cu111 torchvision==0.9.2+cu111 torchaudio===0.8.2 -f https://download.pytorch.org/whl/lts/1.8/torch_lts.html
+!pip install datasets
+!pip install jiwer
+!pip install transformers
+!pip install soundfile
+!pip install pyctcdecode
+!pip install https://github.com/kpu/kenlm/archive/master.zip
+```
+
+
+```python
+import jiwer
+import torchaudio
+from datasets import load_dataset, load_metric
+from transformers import (
+    Wav2Vec2ForCTC,
+    Wav2Vec2Processor,
+)
+from pyctcdecode import build_ctcdecoder
+import torch
+import re
+import sys
+```
+
+### Helpers
+
+
+```python
+chars_to_ignore_regex = '[\,\?\.\!\;\:\"]'  # noqa: W605
+
+def map_to_array(batch):
+    speech, _ = torchaudio.load(batch["path"])
+    batch["speech"] = speech.squeeze(0).numpy() 
+    batch["sampling_rate"] = 16_000 
+    batch["sentence"] = re.sub(chars_to_ignore_regex, '', batch["sentence"]).lower().replace("’", "'")
+    batch["target"] = batch["sentence"]
+    return batch
+```
+
+
+```python
+def calc_metrics(truths, hypos):
+    wers = []
+    mers = []
+    wils = []
+    for t, h in zip(truths, hypos):
+        try:
+            wers.append(jiwer.wer(t, h))
+            mers.append(jiwer.mer(t, h))
+            wils.append(jiwer.wil(t, h))
+        except: # Empty string?
+            pass
+    wer = sum(wers)/len(wers)
+    mer = sum(mers)/len(mers)
+    wil = sum(wils)/len(wils)
+    return wer, mer, wil
+```
+
+
+```python
+def load_data(dataset):
+    data_files = {'test': f'{dataset}/test.csv'}
+    dataset = load_dataset('csv', data_files=data_files)["test"]
+    return dataset.map(map_to_array)
+```
+
+### Model
+
+
+```python
+class STT:
+
+    def __init__(self, 
+                 model_name, 
+                 device='cuda' if torch.cuda.is_available() else 'cpu', 
+                 lm=None):
+        self.model_name = model_name
+        self.model = Wav2Vec2ForCTC.from_pretrained(model_name).to(device)
+        self.processor = Wav2Vec2Processor.from_pretrained(model_name)
+        self.vocab_dict = self.processor.tokenizer.get_vocab()
+        self.sorted_dict = {
+            k.lower(): v for k, v in sorted(self.vocab_dict.items(), 
+                                            key=lambda item: item[1])
+        }
+        self.device = device
+        self.lm = lm
+        if self.lm:            
+            self.lm_decoder = build_ctcdecoder(
+                list(self.sorted_dict.keys()),
+                self.lm
+            )
+
+    def batch_predict(self, batch):
+        features = self.processor(batch["speech"], 
+                                  sampling_rate=batch["sampling_rate"][0], 
+                                  padding=True, 
+                                  return_tensors="pt")
+        input_values = features.input_values.to(self.device)
+        attention_mask = features.attention_mask.to(self.device)
+        with torch.no_grad():
+            logits = self.model(input_values, attention_mask=attention_mask).logits
+        if self.lm:
+            logits = logits.cpu().numpy()
+            batch["predicted"] = []
+            for sample_logits in logits:
+                batch["predicted"].append(self.lm_decoder.decode(sample_logits))
+        else:
+            pred_ids = torch.argmax(logits, dim=-1)
+            batch["predicted"] = self.processor.batch_decode(pred_ids)
+        return batch
+```
+
+### Download datasets
+
+
+```python
+%%capture
+!gdown --id 1HFECzIizf-bmkQRLiQD0QVqcGtOG5upI
+!mkdir bp_dataset
+!unzip bp_dataset -d bp_dataset/
+```
+
+
+```python
+%cd bp_dataset 
+```
+
+    /content/bp_dataset
+
+
+### Tests 
+
+
+```python
+stt = STT(MODEL_NAME)
+```
+
+#### CETUC
+
+
+```python
+ds = load_data('cetuc_dataset')
+result = ds.map(stt.batch_predict, batched=True, batch_size=8) 
+wer, mer, wil = calc_metrics(result["sentence"], result["predicted"])
+print("CETUC WER:", wer)
+```
+    CETUC WER: 0.05159097808687998
+
+
+#### Common Voice
+
+
+```python
+ds = load_data('commonvoice_dataset')
+result = ds.map(stt.batch_predict, batched=True, batch_size=8) 
+wer, mer, wil = calc_metrics(result["sentence"], result["predicted"])
+print("CV WER:", wer)
+```
+    CV WER: 0.13659981509705973
+
+
+#### LaPS
+
+
+```python
+ds = load_data('lapsbm_dataset')
+result = ds.map(stt.batch_predict, batched=True, batch_size=8) 
+wer, mer, wil = calc_metrics(result["sentence"], result["predicted"])
+print("Laps WER:", wer)
+```
+    Laps WER: 0.03196969696969697
+
+
+#### MLS
+
+
+```python
+ds = load_data('mls_dataset')
+result = ds.map(stt.batch_predict, batched=True, batch_size=8) 
+wer, mer, wil = calc_metrics(result["sentence"], result["predicted"])
+print("MLS WER:", wer)
+```
+    MLS WER: 0.1178481066463896
+
+
+#### SID
+
+
+```python
+ds = load_data('sid_dataset')
+result = ds.map(stt.batch_predict, batched=True, batch_size=8) 
+wer, mer, wil = calc_metrics(result["sentence"], result["predicted"])
+print("Sid WER:", wer)
+```
+    Sid WER: 0.09544588416964224
+
+
+#### TEDx
+
+
+```python
+ds = load_data('tedx_dataset')
+result = ds.map(stt.batch_predict, batched=True, batch_size=8) 
+wer, mer, wil = calc_metrics(result["sentence"], result["predicted"])
+print("TEDx WER:", wer)
+```
+    TEDx WER: 0.24868046340420813
+
+
+#### VoxForge
+
+
+```python
+ds = load_data('voxforge_dataset')
+result = ds.map(stt.batch_predict, batched=True, batch_size=8) 
+wer, mer, wil = calc_metrics(result["sentence"], result["predicted"])
+print("VoxForge WER:", wer)
+```
+    VoxForge WER: 0.08246076839826841
+
+
+### Tests with LM
+
+
+```python
+!rm -rf ~/.cache
+!gdown --id 1GJIKseP5ZkTbllQVgOL98R4yYAcIySFP  # trained with wikipedia
+stt = STT(MODEL_NAME, lm='pt-BR-wiki.word.4-gram.arpa')
+# !gdown --id 1dLFldy7eguPtyJj5OAlI4Emnx0BpFywg  # trained with bp
+# stt = STT(MODEL_NAME, lm='pt-BR.word.4-gram.arpa')
+```
+
+### Cetuc
+
+
+```python
+ds = load_data('cetuc_dataset')
+result = ds.map(stt.batch_predict, batched=True, batch_size=8) 
+wer, mer, wil = calc_metrics(result["sentence"], result["predicted"])
+print("CETUC WER:", wer)
+```
+    CETUC WER: 0.03222801788375573
+
+
+#### Common Voice
+
+
+```python
+ds = load_data('commonvoice_dataset')
+result = ds.map(stt.batch_predict, batched=True, batch_size=8) 
+wer, mer, wil = calc_metrics(result["sentence"], result["predicted"])
+print("CV WER:", wer)
+```
+    CV WER: 0.09713866021093655
+
+
+#### LaPS
+
+
+```python
+ds = load_data('lapsbm_dataset')
+result = ds.map(stt.batch_predict, batched=True, batch_size=8) 
+wer, mer, wil = calc_metrics(result["sentence"], result["predicted"])
+print("Laps WER:", wer)
+```
+    Laps WER: 0.022310606060606065
+
+
+#### MLS
+
+
+```python
+ds = load_data('mls_dataset')
+result = ds.map(stt.batch_predict, batched=True, batch_size=8) 
+wer, mer, wil = calc_metrics(result["sentence"], result["predicted"])
+print("MLS WER:", wer)
+```
+    MLS WER: 0.11408590958696524
+
+
+#### SID
+
+
+```python
+ds = load_data('sid_dataset')
+result = ds.map(stt.batch_predict, batched=True, batch_size=8) 
+wer, mer, wil = calc_metrics(result["sentence"], result["predicted"])
+print("Sid WER:", wer)
+```
+    Sid WER: 0.12502797252979136
+
+
+#### TEDx
+
+
+```python
+ds = load_data('tedx_dataset')
+result = ds.map(stt.batch_predict, batched=True, batch_size=8) 
+wer, mer, wil = calc_metrics(result["sentence"], result["predicted"])
+print("TEDx WER:", wer)
+```
+    TEDx WER: 0.24603179403904793
+
+
+#### VoxForge
+
+
+```python
+ds = load_data('voxforge_dataset')
+result = ds.map(stt.batch_predict, batched=True, batch_size=8) 
+wer, mer, wil = calc_metrics(result["sentence"], result["predicted"])
+print("VoxForge WER:", wer)
+```
+    VoxForge WER: 0.06542207792207791
+