A machine learning researcher I had the pleasure of knowing when I was at MSR had a background in EE, in particular digital signal processing is a very useful skill in the field. He was the first person I heard mention the quantized model approach (back in 2012 I think?) and compared it to old 1-bit quantized noise reduction in CD players.

A bit of irony was that this researcher (from Europe) used to work in the same lab as me in Beijing. But these days the talent doesn’t flow so easily as it did a decade+ ago (but maybe it will again? Researchers aren’t very nationalistic and will look for the best toys to play with).