Visual Microphone: Audio extracted from Vibrations of a Potato-Chip Bag

04.08.2014 Misc Tech #Audio

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Wissenschaftler am MIT haben Audiodaten aus Videos einer Chipspackung extrahiert, die von eben genau diesen Audiosignalen vibrierte. Die haben das nicht nur mit Highspeed-Kameras geschafft, sondern auch mit handelsüblichen 60FPS-Cams. Die Implikationen kann sich jeder selber ausrechnen.

Researchers at MIT, Microsoft, and Adobe have developed an algorithm that can reconstruct an audio signal by analyzing minute vibrations of objects depicted in video. In one set of experiments, they were able to recover intelligible speech from the vibrations of a potato-chip bag photographed from 15 feet away through soundproof glass.

In other experiments, they extracted useful audio signals from videos of aluminum foil, the surface of a glass of water, and even the leaves of a potted plant. The researchers will present their findings in a paper at this year’s Siggraph, the premier computer graphics conference.

MIT: Extracting audio from visual information, The Visual Microphone: Passive Recovery of Sound from Video (via MeFi)