Silent squeals make TV interactive

摘要

Hear that high-pitched ringing? No, me neither. But such sounds at low volume can now be used to deliver bonus television content to your cellphone or tablet. "Imagine that you're watching a travel programme and your phone instantly receives the exact location, booking details and nearby attractions of the place you see," says Tae Hyun Kim of Soundlly in Seoul, South Korea which developed the technology. The system uses your TVs speakers to play data-filled tones alongside whatever you are watching. You won't notice a difference, but the microphone on your smartphone will, picking up additional content streamed alongside the main event. 'This can make television interactive," says Tae.