braindecode.models.SignalJEPA_Contextual#

class braindecode.models.SignalJEPA_Contextual(n_outputs=None, n_chans=None, chs_info=None, n_times=None, input_window_seconds=None, sfreq=None, *, n_spat_filters=4, feature_encoder__conv_layers_spec=((8, 32, 8), (16, 2, 2), (32, 2, 2), (64, 2, 2), (64, 2, 2)), drop_prob=0.0, feature_encoder__mode='default', feature_encoder__conv_bias=False, activation=<class 'torch.nn.modules.activation.GELU'>, pos_encoder__spat_dim=30, pos_encoder__time_dim=34, pos_encoder__sfreq_features=1.0, pos_encoder__spat_kwargs=None, transformer__d_model=64, transformer__num_encoder_layers=8, transformer__num_decoder_layers=4, transformer__nhead=8, _init_feature_encoder=True, _init_transformer=True)[source]#

Contextual downstream architecture introduced in signal-JEPA Guetschel, P et al (2024) [1].

Convolution Channel Foundation Model

This architecture is one of the variants of SignalJEPA that can be used for classification purposes.

sJEPA Contextual.

Added in version 0.9.

Parameters:

n_spat_filters (int) – Number of spatial filters.

References

[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

Methods

forward(X, ch_idxs=None)[source]#

Define the computation performed at every call.

Should be overridden by all subclasses.

Note

Although the recipe for forward pass needs to be defined within this function, one should call the Module instance afterwards instead of this since the former takes care of running the registered hooks while the latter silently ignores them.

classmethod from_pretrained(model=None, n_outputs=None, n_spat_filters=4, chs_info=None, **kwargs)[source]#

Instantiate a new model from a pre-trained SignalJEPA model or from Hub.

Parameters:

  • model (SignalJEPA, str, Path, or None) – Either a pre-trained SignalJEPA model, a string/Path to a local directory (for Hub-style loading), or None (for Hub loading via kwargs).

  • n_outputs (int or None) – Number of classes for the new model. Required when loading from a SignalJEPA model, optional when loading from Hub (will be read from config).

  • n_spat_filters (int) – Number of spatial filters.

  • chs_info (list of dict | None) – Information about each individual EEG channel. This should be filled with info["chs"]. Refer to mne.Info for more details.

  • **kwargs – Additional keyword arguments passed to the parent class for Hub loading.