Spectrogram: a possible feature

[fabienBourban]

As we have a spectrum panel, would it be possible to have also a spectrogram panel in EegView?

[nbourdau]

I am not sure to understand the request... There is already a spectrum panel in eegview however only for the EEG channels group. Do you mean to a spectrum panel for the other signal group?

[fabienBourban]

I know that is already exists a spectrum panel that show the PSD of a specific electrode.
I was speaking about a spectrogram so that we can visualize the evolution of the frequencies real time, e.g. usefull to see the alpha power changing over time.

[nbourdau]

Ok, understood... Sorry for my confusion... It is cristal clear now.

It is indeed a nice feature to have. However, the naive implementation will be extremely resource intensive: drawing a spectrogram of 2048 points by 10s of 2Khz signal is updating/rendering a texture of 125MB. This is doable on a normal workstation but the idea is to avoid the measuring tools slowing the system as a whole and restricting available resources for other stuff. I will see how to do this efficiently.