The Walls Can Talk: New Technique Extracts Audio From Video
Thursday, December 4, 2014 - 14:01
in Physics & Chemistry
A new optical technique by which audio information can be extracted from high-speed video recordings, by using an image-matching process based on vibration from sound waves. The technique is based on the fact that sound waves are mechanical waves that cause air to vibrate when traveling, the paper notes. That vibration through air can cause vibration of objects located in its traveling path, especially if the objects are lightweight, thin, and flexible, such as a piece of paper. The vibrations, although usually with small amplitudes, can be detected and analyzed algorithmically, and audio reconstructed based on those calculations. read more