15 April 2010 Long range audio and audio-visual event detection using a laser Doppler vibrometer
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Abstract
Association of audio events with video events presents a challenge to a typical camera-microphone approach in order to capture AV signals from a large distance. Setting up a long range microphone array and performing geo-calibration of both audio and video sensors is difficult. In this work, in addition to a geo-calibrated electro-optical camera, we propose to use a novel optical sensor - a Laser Doppler Vibrometer (LDV) for real-time audio sensing, which allows us to capture acoustic signals from a large distance, and to use the same geo-calibration for both the camera and the audio (via LDV). We have promising preliminary results on association of the audio recording of speech with the video of the human speaker.
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Tao Wang, Zhigang Zhu, Ajay Divakaran, "Long range audio and audio-visual event detection using a laser Doppler vibrometer", Proc. SPIE 7704, Evolutionary and Bio-Inspired Computation: Theory and Applications IV, 77040J (15 April 2010); doi: 10.1117/12.853593; https://doi.org/10.1117/12.853593
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