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# SignalJEPA_PostLocal
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Post-local downstream architecture introduced in signal-JEPA Guetschel, P et al (2024) .
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> **Architecture-only repository.**
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> `braindecode.models.SignalJEPA_PostLocal` class. **No pretrained weights are
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> distributed here**
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> data
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> separately.
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## Quick start
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The signal-shape arguments above are
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## Documentation
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<https://braindecode.org/stable/generated/braindecode.models.SignalJEPA_PostLocal.html>
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- Interactive browser with live instantiation:
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<https://huggingface.co/spaces/braindecode/model-explorer>
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- Source on GitHub: <https://github.com/braindecode/braindecode/blob/master/braindecode/models/signal_jepa.py#L749>
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## Architecture description
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The block below is the rendered class docstring (parameters,
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references, architecture figure where available).
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<div class='bd-doc'><main>
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<p>Post-local downstream architecture introduced in signal-JEPA Guetschel, P et al (2024) [1]_.</p>
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<span style="display:inline-block;padding:2px 8px;border-radius:4px;background:#5cb85c;color:white;font-size:11px;font-weight:600;margin-right:4px;">Convolution</span>
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:bdg-dark-line:`Channel`<span style="display:inline-block;padding:2px 8px;border-radius:4px;background:#d9534f;color:white;font-size:11px;font-weight:600;margin-right:4px;">Foundation Model</span>
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This architecture is one of the variants of :class:`SignalJEPA`
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that can be used for classification purposes.
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.. figure:: https://braindecode.org/dev/_static/model/sjepa_post-local.jpg
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:align: center
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:alt: sJEPA Pre-Local.
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.. versionadded:: 0.9
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.. rubric:: Pretrained Weights
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Only the feature encoder weights are reused from the shared
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SSL checkpoints. This model has no channel embedding nor transformer,
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so ``strict=False`` is required at load time to skip the unused keys.
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Either hub variant works; the ``_without-chans`` one is slightly
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smaller.
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.. important::
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**Pre-trained Weights Available**
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.. code:: python
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from braindecode.models import SignalJEPA_PostLocal
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model = SignalJEPA_PostLocal.from_pretrained(
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"braindecode/signal-jepa_without-chans",
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n_chans=22,
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input_window_seconds=16.0,
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n_outputs=4,
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strict=False,
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)
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Requires installing ``braindecode[hub]`` for Hub integration.
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.. rubric:: Usage
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.. code:: python
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from braindecode.models import SignalJEPA_PostLocal
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model = SignalJEPA_PostLocal(
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n_chans=22,
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input_window_seconds=16.0,
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sfreq=128,
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n_outputs=4, # e.g., 4-class classification
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)
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# Forward: (batch, n_chans, n_times) -> (batch, n_outputs)
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output = model(eeg_data)
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.. warning::
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Pre-trained at **128 Hz** on EEG bandpass-filtered between
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**0.5 and 40 Hz** and rescaled by a factor of :math:`10^{6}`
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(volts to microvolts). Apply the same preprocessing to your
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data to match the pre-training distribution.
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Parameters
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----------
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n_spat_filters : int
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Number of spatial filters.
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References
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----------
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.. [1] Guetschel, P., Moreau, T., & Tangermann, M. (2024).
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S-JEPA: towards seamless cross-dataset transfer through dynamic spatial attention.
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In 9th Graz Brain-Computer Interface Conference, https://www.doi.org/10.3217/978-3-99161-014-4-003
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.. rubric:: Hugging Face Hub integration
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When the optional ``huggingface_hub`` package is installed, all models
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automatically gain the ability to be pushed to and loaded from the
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Hugging Face Hub. Install with::
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pip install braindecode[hub]
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**Pushing a model to the Hub:**
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.. code::
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from braindecode.models import SignalJEPA_PostLocal
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# Train your model
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model = SignalJEPA_PostLocal(n_chans=22, n_outputs=4, n_times=1000)
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# ... training code ...
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# Push to the Hub
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model.push_to_hub(
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repo_id="username/my-signaljepa_postlocal-model",
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commit_message="Initial model upload",
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)
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**Loading a model from the Hub:**
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.. code::
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from braindecode.models import SignalJEPA_PostLocal
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# Load pretrained model
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model = SignalJEPA_PostLocal.from_pretrained("username/my-signaljepa_postlocal-model")
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# Load with a different number of outputs (head is rebuilt automatically)
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model = SignalJEPA_PostLocal.from_pretrained("username/my-signaljepa_postlocal-model", n_outputs=4)
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**Extracting features and replacing the head:**
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import torch
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# Extract encoder features (consistent dict across all models)
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out = model(x, return_features=True)
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features = out["features"]
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# Replace the classification head
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model.reset_head(n_outputs=10)
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config = model.get_config() # all __init__ params
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with open("config.json", "w") as f:
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json.dump(config, f)
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dropout rates, activation functions, number of filters) are automatically
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saved to the Hub and restored when loading.
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See :ref:`load-pretrained-models` for a complete tutorial.</main>
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</div>
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## Citation
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*References* section above) and braindecode:
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```bibtex
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@article{aristimunha2025braindecode,
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# SignalJEPA_PostLocal
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Post-local downstream architecture introduced in signal-JEPA Guetschel, P et al (2024) [1].
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> **Architecture-only repository.** Documents the
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> `braindecode.models.SignalJEPA_PostLocal` class. **No pretrained weights are
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> distributed here.** Instantiate the model and train it on your own
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> data.
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## Quick start
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)
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```
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The signal-shape arguments above are illustrative defaults — adjust to
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match your recording.
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## Documentation
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- Full API reference: <https://braindecode.org/stable/generated/braindecode.models.SignalJEPA_PostLocal.html>
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- Interactive browser (live instantiation, parameter counts):
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<https://huggingface.co/spaces/braindecode/model-explorer>
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- Source on GitHub: <https://github.com/braindecode/braindecode/blob/master/braindecode/models/signal_jepa.py#L749>
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## Architecture
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## Parameters
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| Parameter | Type | Description |
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| `n_spat_filters` | int | Number of spatial filters. |
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## References
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1. Guetschel, P., Moreau, T., & Tangermann, M. (2024). S-JEPA: towards seamless cross-dataset transfer through dynamic spatial attention. In 9th Graz Brain-Computer Interface Conference, https://www.doi.org/10.3217/978-3-99161-014-4-003
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## Citation
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Cite the original architecture paper (see *References* above) and braindecode:
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```bibtex
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@article{aristimunha2025braindecode,
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