Is this meant for receiver-only, or bidirectional transfer? (he says bidirectional in the ted talk, but only talks about phones using their cameras to receive).
Seems a little like a technology in search of a problem.
Plus, you already have 'spatial multiplexing' because light doesn't pass through walls as opposed to RF.
That doesn't make any sense at all. People don't intercept data transmission with their eyes. If your computer or device can "see" the light, so can mine.
LEDs can go to much higher speeds - but even still, this isn't new. Researchers in Japan and Boston University have been producing demos for years:
http://www.bu.edu/smartlighting/research/smart-light-prototy...
This technique was used in at least the early 90s
http://blog.ted.com/2011/08/02/wireless-data-from-every-ligh...
It seems like a good idea but he does not address how to get the data to each light fixture
Thinking more about it, any signal "controlling" an autopiloted car would be insecure and be an easy exploit that any malicious-minded people could take advantage of. But that's a discussion that's besides the point.
Well, same meaning I guess. Only literal.
