wav2vec2-xls-r-300m-cs-cv8

This model is a fine-tuned version of facebook/wav2vec2-xls-r-300m on the common_voice 8.0 dataset. It achieves the following results on the evaluation set while training:

• Loss: 0.2327
• Wer: 0.1608
• Cer: 0.0376

The eval.py script results using a LM are: WER: 0.10281503199350225 CER: 0.02622802241689026

Model description

Fine-tuned facebook/wav2vec2-large-xlsr-53 on Czech using the Common Voice dataset. When using this model, make sure that your speech input is sampled at 16kHz.

The model can be used directly (without a language model) as follows:

import torch
import torchaudio
from datasets import load_dataset
from transformers import Wav2Vec2ForCTC, Wav2Vec2Processor

test_dataset = load_dataset("mozilla-foundation/common_voice_8_0", "cs", split="test[:2%]")

processor = Wav2Vec2Processor.from_pretrained("comodoro/wav2vec2-xls-r-300m-cs-cv8")
model = Wav2Vec2ForCTC.from_pretrained("comodoro/wav2vec2-xls-r-300m-cs-cv8")

resampler = torchaudio.transforms.Resample(48_000, 16_000)

# Preprocessing the datasets.
# We need to read the aduio files as arrays
def speech_file_to_array_fn(batch):
    speech_array, sampling_rate = torchaudio.load(batch["path"])
    batch["speech"] = resampler(speech_array).squeeze().numpy()
    return batch

test_dataset = test_dataset.map(speech_file_to_array_fn)
inputs = processor(test_dataset[:2]["speech"], sampling_rate=16_000, return_tensors="pt", padding=True)

with torch.no_grad():
    logits = model(inputs.input_values, attention_mask=inputs.attention_mask).logits

predicted_ids = torch.argmax(logits, dim=-1)

print("Prediction:", processor.batch_decode(predicted_ids))
print("Reference:", test_dataset[:2]["sentence"])

Evaluation

The model can be evaluated using the attached eval.py script:

python eval.py --model_id comodoro/wav2vec2-xls-r-300m-cs-cv8 --dataset mozilla-foundation/common-voice_8_0 --split test --config cs

Training and evaluation data

The Common Voice 8.0 train and validation datasets were used for training

Training procedure

Training hyperparameters

The following hyperparameters were used during first stage of training:

• learning_rate: 7e-05
• train_batch_size: 32
• eval_batch_size: 8
• seed: 42
• gradient_accumulation_steps: 20
• total_train_batch_size: 640
• optimizer: Adam with betas=(0.9,0.999) and epsilon=1e-08
• lr_scheduler_type: linear
• lr_scheduler_warmup_steps: 500
• num_epochs: 150
• mixed_precision_training: Native AMP

The following hyperparameters were used during second stage of training:

• learning_rate: 0.001
• train_batch_size: 32
• eval_batch_size: 8
• seed: 42
• gradient_accumulation_steps: 20
• total_train_batch_size: 640
• optimizer: Adam with betas=(0.9,0.999) and epsilon=1e-08
• lr_scheduler_type: linear
• lr_scheduler_warmup_steps: 500
• num_epochs: 50
• mixed_precision_training: Native AMP

Training results

Training Loss	Epoch	Step	Validation Loss	Wer	Cer
7.2926	8.06	250	3.8497	1.0	1.0
3.417	16.13	500	3.2852	1.0	0.9857
2.0264	24.19	750	0.7099	0.7342	0.1768
0.4018	32.25	1000	0.6188	0.6415	0.1551
0.2444	40.32	1250	0.6632	0.6362	0.1600
0.1882	48.38	1500	0.6070	0.5783	0.1388
0.153	56.44	1750	0.6425	0.5720	0.1377
0.1214	64.51	2000	0.6363	0.5546	0.1337
0.1011	72.57	2250	0.6310	0.5222	0.1224
0.0879	80.63	2500	0.6353	0.5258	0.1253
0.0782	88.7	2750	0.6078	0.4904	0.1127
0.0709	96.76	3000	0.6465	0.4960	0.1154
0.0661	104.82	3250	0.6622	0.4945	0.1166
0.0616	112.89	3500	0.6440	0.4786	0.1104
0.0579	120.95	3750	0.6815	0.4887	0.1144
0.0549	129.03	4000	0.6603	0.4780	0.1105
0.0527	137.09	4250	0.6652	0.4749	0.1090
0.0506	145.16	4500	0.6958	0.4846	0.1133

Further fine-tuning with slightly different architecture and higher learning rate:

Training Loss	Epoch	Step	Validation Loss	Wer	Cer
0.576	8.06	250	0.2411	0.2340	0.0502
0.2564	16.13	500	0.2305	0.2097	0.0492
0.2018	24.19	750	0.2371	0.2059	0.0494
0.1549	32.25	1000	0.2298	0.1844	0.0435
0.1224	40.32	1250	0.2288	0.1725	0.0407
0.1004	48.38	1500	0.2327	0.1608	0.0376

Framework versions

• Transformers 4.16.0.dev0
• Pytorch 1.10.1+cu102
• Datasets 1.17.1.dev0
• Tokenizers 0.11.0