Recovering speech from the vibrations of a potato-chip bag filmed through soundproof glass https://youtube/watch?v=UbbCJcfDoIc&list=PLK2ccNIJVPpB_XqWWq_oaZGIDzmKiSkYc 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. When sound hits an object, it causes the object to vibrate. The motion of this vibration creates a very subtle visual signal that’s usually invisible to the naked eye. People didn’t realize that this information was there. Reconstructing audio from video requires that the frequency of the video samples be higher than the frequency of the audio signal. i-e it needs high-speed camera which can capture 2,000 to 6,000 frames per second. This new technology turns everyday objects such as a glass of water, a potted plant, a box of tissues, or a bag of chips, into visual microphones. It has obvious applications in law enforcement and forensics. And, according to the researchers, this technology gives lot of information about the object itself apart from giving sound details. Because different objects are going to respond to sound in different ways. So, this technology can help to determine material and structural properties of objects from their visible response to short bursts of sound. #technology #innovation #technews
Posted on: Mon, 25 Aug 2014 08:02:56 +0000
Trending Topics
Recently Viewed Topics
© 2015