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# FBCNet
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FBCNet from Mane, R et al (2021) .
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> **Architecture-only repository.**
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> `braindecode.models.FBCNet` 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.FBCNet.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/fbcnet.py#L31>
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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>FBCNet from Mane, R et al (2021) [fbcnet2021]_.</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><span style="display:inline-block;padding:2px 8px;border-radius:4px;background:#0072B2;color:white;font-size:11px;font-weight:600;margin-right:4px;">Filterbank</span>
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.. figure:: https://raw.githubusercontent.com/ravikiran-mane/FBCNet/refs/heads/master/FBCNet-V2.png
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:align: center
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:alt: FBCNet Architecture
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The FBCNet model applies spatial convolution and variance calculation along
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the time axis, inspired by the Filter Bank Common Spatial Pattern (FBCSP)
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algorithm.
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Notes
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-----
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This implementation is not guaranteed to be correct and has not been checked
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by the original authors; it has only been reimplemented from the paper
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description and source code [fbcnetcode2021]_. There is a difference in the
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activation function; in the paper, the ELU is used as the activation function,
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but in the original code, SiLU is used. We followed the code.
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Parameters
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----------
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n_bands : int or None or list[tuple[int, int]]], default=9
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Number of frequency bands. Could
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n_filters_spat : int, default=32
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Number of spatial filters for the first convolution.
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n_dim: int, default=3
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Number of dimensions for the temporal reductor
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temporal_layer : str, default='LogVarLayer'
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Type of temporal aggregator layer. Options: 'VarLayer', 'StdLayer',
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'LogVarLayer', 'MeanLayer', 'MaxLayer'.
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stride_factor : int, default=4
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Stride factor for reshaping.
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activation : nn.Module, default=nn.SiLU
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Activation function class to apply in Spatial Convolution Block.
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cnn_max_norm : float, default=2.0
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Maximum norm for the spatial convolution layer.
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linear_max_norm : float, default=0.5
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Maximum norm for the final linear layer.
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filter_parameters: dict, default None
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Dictionary of parameters to use for the FilterBankLayer.
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If None, a default Chebyshev Type II filter with transition bandwidth of
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2 Hz and stop-band ripple of 30 dB will be used.
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References
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----------
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.. [fbcnet2021] Mane, R., Chew, E., Chua, K., Ang, K. K., Robinson, N.,
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Vinod, A. P., ... & Guan, C. (2021). FBCNet: A multi-view convolutional
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neural network for brain-computer interface. preprint arXiv:2104.01233.
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.. [fbcnetcode2021] Link to source-code:
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https://github.com/ravikiran-mane/FBCNet
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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 FBCNet
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# Train your model
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model = FBCNet(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-fbcnet-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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from braindecode.models import FBCNet
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model = FBCNet.from_pretrained("username/my-fbcnet-model")
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# Load with a different number of outputs (head is rebuilt automatically)
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model = FBCNet.from_pretrained("username/my-fbcnet-model", n_outputs=4)
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x = torch.randn(1, model.n_chans, model.n_times)
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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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model.reset_head(n_outputs=10)
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.. code::
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import json
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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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model2 = FBCNet.from_config(config) # reconstruct (no weights)
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All model parameters (both EEG-specific and model-specific such as
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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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# FBCNet
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FBCNet from Mane, R et al (2021) [fbcnet2021].
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> **Architecture-only repository.** Documents the
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> `braindecode.models.FBCNet` 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.FBCNet.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/fbcnet.py#L31>
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## Architecture
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## Parameters
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| Parameter | Type | Description |
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|---|---|---|
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| `n_bands` | int or None or list[tuple[int, int]]], default=9 | Number of frequency bands. Could |
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| `n_filters_spat` | int, default=32 | Number of spatial filters for the first convolution. |
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| `n_dim: int, default=3` | — | Number of dimensions for the temporal reductor |
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| `temporal_layer` | str, default='LogVarLayer' | Type of temporal aggregator layer. Options: 'VarLayer', 'StdLayer', 'LogVarLayer', 'MeanLayer', 'MaxLayer'. |
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| `stride_factor` | int, default=4 | Stride factor for reshaping. |
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| `activation` | nn.Module, default=nn.SiLU | Activation function class to apply in Spatial Convolution Block. |
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| `cnn_max_norm` | float, default=2.0 | Maximum norm for the spatial convolution layer. |
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| `linear_max_norm` | float, default=0.5 | Maximum norm for the final linear layer. |
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| `filter_parameters: dict, default None` | — | Dictionary of parameters to use for the FilterBankLayer. If None, a default Chebyshev Type II filter with transition bandwidth of 2 Hz and stop-band ripple of 30 dB will be used. |
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## References
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1. Mane, R., Chew, E., Chua, K., Ang, K. K., Robinson, N., Vinod, A. P., ... & Guan, C. (2021). FBCNet: A multi-view convolutional neural network for brain-computer interface. preprint arXiv:2104.01233.
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2. Link to source-code: https://github.com/ravikiran-mane/FBCNet
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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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