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Türkes, O. and Baydere, S. (2012) Voice Quality Improvement with Error Concealment in Audio Sensor Networks. In: Proceedings of the 10th International Conference on Wired / Wireless Internet Communication, WWIC 2012, 6-8 Jun 2012, Santorini, Greece. pp. 307-314. Lecture Notes in Computer Science 7277. Springer Verlag. ISSN 0302-9743 ISBN 978-3-642-30629-7
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Official URL: http://dx.doi.org/10.1007/978-3-642-30630-3_27
Multi-dimensional properties of audio data and resource-poor nodes make voice processing and transmission a challenging task for Wireless Sensor Networks (WSN). This study analyzes voice quality distortions caused by packet losses occurring over a multi-hop WSN testbed: A comprehensive analysis of transmitted voice quality is given in a real setup. In the experiments, recorded signals are partitioned into data segments and delivered efficiently at the source. Throughout the network, two reconstruction scenarios are considered for the lost segments: In the first one, a raw projection is applied on voice with no error concealment (V-NC) whereas the latter encodes a simple error concealment (V-EC). It is shown that with an affordable reconstruction, a comprehensible voice can be gathered even when packet error rate is as high as 30%.
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