Remember Yamaha's InfoSound technology. If not, well, it's a bit of black magic that shoots data wirelessly to devices using an inaudible (to humans, anyway) 18kHz signal emitted from a speaker and received via microphone. Yamaha came up with the idea back before the ubiquity of WiFi-enabled TVs, and now it's partnered up with Fuji Television Network to develop apps for phones and tablets that use the tech. Keep in mind, InfoSound has a fairly short range (33 feet) and maxes out with a data rate of only 80 bits per second, so you won't be streaming sound or video.
Engadget, Yamaha gets Fuji TV into InfoSound, to bring acoustic data transmission apps to tablets and phones
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