Voice quality improvement with error concealment in audio sensor networks

Türkes, Okan and Baydere, Sebnem (2012) Voice quality improvement with error concealment in audio sensor networks. In: 10th International Conference on Wired/Wireless Internet Communication, WWIC 2012, 6-8 June 2012, Santorini, Greece.

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Abstract:	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%.
Item Type:	Conference or Workshop Item
Copyright:	© 2012 Springer
Faculty:	Electrical Engineering, Mathematics and Computer Science (EEMCS)
Research Group:	Pervasive Systems (PS)
Link to this item:	http://purl.utwente.nl/publications/80773
Official URL:	http://dx.doi.org/10.1007/978-3-642-30630-3_27
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