NeMo/scripts/pseudo_labeling/README.md

🧠 TopIPL: Iterative Pseudo-Labeling for ASR

TopIPL is an iterative pseudo-labeling algorithm for training speech recognition models using both labeled and unlabeled data. It integrates seamlessly into the NeMo ASR pipeline and enables self-training across epochs with minimal manual intervention.

🚀 Key Features

• ⚙️ Supports semi-supervised ASR training with dynamic iterative pseudo-label refinement.
• 🧪 Designed for large-scale training using both labeled and unlabeled speech data.
• 🔁 Automatically writes pseudo-labels and updates training configs between iterations.

📦 Required Components

TopIPL relies on the following components:

• [SDPNeMoRunIPLProcessor]
  Commands for running IPL are generated and submitted using SDP processors and NeMo-Run.
  See instructions for usage here.

• Training Callback: IPLEpochStopperCallback
  Add this to your training config under exp_manager to stop training at the end of each epoch, enabling pseudo-label update:

exp_manager:
  create_ipl_epoch_stopper_callback: True
  ipl_epoch_stopper_callback_params:
    stop_every_n_epochs: n # Stop training after every n epochs (default: 1)