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Low-cost synchronization of high-speed audio and video recordings in bio-acoustic experiments
Dennis Laurijssen1, Erik Verreycken1, Inga Geipel2,3
1CoSys Lab, Faculty of Applied Engineering, University of Antwerp, B-2020 Antwerp, Belgium.
Abstract:
In this paper, we present a method for synchronizing high-speed audio and video recordings of bio-acoustic experiments. By embedding a random signal into the recorded video and audio data, robust synchronization of a diverse set of sensor streams can be performed without the need to keep detailed records. The synchronization can be performed using recording devices without dedicated synchronization inputs. We demonstrate the efficacy of the approach in two sets of experiments: behavioral experiments on different species of echolocating bats and the recordings of field crickets. We present the general operating principle of the synchronization method, discuss its synchronization strength and provide insights into how to construct such a device using off-the-shelf components.
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