[fundamental]

This technology uses an electrode array referred to as ECoG, which needs to be surgically placed on the surface of the brain. Current technology does not make it possible to have the signal quality from non-invasive methods.

[thisisananth]

Ok. Then all those applications will have to wait!

[king07828]

Sounds like a neural network that converts EEG signals to ECoG signals would be an interesting idea.

[sagarm]

If there is enough information in EEG signals to generate speech, an intervening layer to "convert" EEG signals into ECoG signals is an unnecessary complication.

[entropicdrifter]

Unfortunately, there probably isn't; on top of that, EEGs are extremely susceptible to noise from nerve signals going to the head/face, such as clenching your jaw or raising your eyebrows

[swordsmith]

ECoG has much higher temporal and spatial resolution than EEG. Conversion from EEG to ECoG is not likely, the opposite can be done, but not very useful though.