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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.

(no subject)

Date: 2014-08-08 09:05 pm (UTC)
From: [identity profile] unnamed525.livejournal.com
Grrrrrrrrreeeeeaaaaaaaaaaat.

(no subject)

Date: 2014-08-09 01:01 pm (UTC)
From: [identity profile] ironphoenix.livejournal.com
Neeeeeeeeeat... the information-theoretical trick of extracting audio bandwidth much higher than the video frame rate is extremely clever.

(no subject)

Date: 2014-08-09 01:40 pm (UTC)
From: [identity profile] theweaselking.livejournal.com
I know, right? They're taking the cheap shortcut that cheap cameras do and turning *that* into signal - taking each line of the output as a "frame" to turn 60fps into a ton of really crappy frames

(no subject)

Date: 2014-08-09 10:58 pm (UTC)
From: [identity profile] kafziel.livejournal.com
I'd be very curious to see if they can do anything with an old silent movie.

(no subject)

Date: 2014-08-09 11:43 pm (UTC)
From: [identity profile] theweaselking.livejournal.com
Extremely unlikely - frame rate too low, and the camera wasn't a cheap digital "one line at a time"

(no subject)

Date: 2014-08-14 01:57 pm (UTC)

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