---
license: mit
task_categories:
- automatic-speech-recognition
tags:
- collator
---

## Dynamic Audio Data Augmentation


  ## Key Benefits

  Enhanced Robustness: By varying spectrogram parameters and injecting realistic noise, our models learn to handle a wide range of audio conditions.
  
  Low Overhead: The augmentation is integrated into the existing pipeline, ensuring minimal additional computational cost. Data collator (low overhead) versus Dataset (higher overhead)



### On-the-Fly Spectrogram Parameter Adjustment:

n_fft and hop_length: Values for n_fft and hop_length are randomly selected from predefined ranges for each audio sample, providing varied spectrogram representations.

  ### Log-Mel Modulation:

  Augmentation process integrates with the existing log-Mel spectrogram calculation. This means we modulate the parameters of the log-Mel spectrogram dynamically, ensuring no additional overhead is introduced while providing effective data augmentation.

  ### Efficiency and Performance
  Log-Mel Spectrogram Manipulation:

  Augmentation process seamlessly integrates into the existing log-Mel spectrogram calculation, adding no extra overhead. This efficient design ensures that our preprocessing remains computationally lightweight and fast.


#### Adaptive Context-Aware Noise Injection

Preprocessing pipeline that includes adaptive context-aware noise injection to enhance model robustness. This method dynamically adjusts noise intensity based on the amplitude of the audio signal, ensuring realistic and effective augmentation.

- **Types of Noise**: White, pink, and environmental noise.
- **Dynamic Adjustment**: Noise intensity is scaled based on the amplitude of the audio signal.
- **Integration**: The noise injection process is seamlessly integrated into our existing log-Mel spectrogram calculation pipeline, adding minimal overhead.

##### Key Benefits

- **Improved Generalization**: Models become more resilient to noise and diverse audio conditions.
- **Low Overhead**: The augmentation process leverages the existing pipeline, ensuring efficient computation without significant additional cost.

##### Example Usage

```python

## HF transformers or pure pytorch

data_collator = DataCollatorSpeechSeq2SeqWithPadding(
    processor=processor,
    decoder_start_token_id=model.config.decoder_start_token_id,
    apply_augmentation=True,
    apply_noise_injection=True  # Enable adaptive noise injection
)

dataloader = torch.utils.data.DataLoader(dataset, batch_size=2, shuffle=True, collate_fn=data_collator)

for batch in dataloader:
    outputs = model(batch)