| Paper: | SPCOM-L7.6 | ||
| Session: | Wireless Sensor Networks | ||
| Time: | Friday, May 19, 15:40 - 16:00 | ||
| Presentation: | Lecture | ||
| Topic: | Signal Processing for Communication: Signal representation, modulation, coding and compression | ||
| Title: | Distributed Compression in Acoustic Sensor Networks Using Oversampled A/D Conversion | ||
| Authors: | Olivier Roy, Martin Vetterli, Swiss Federal Institute of Technology Lausanne (EPFL), Switzerland | ||
| Abstract: | We address the problem of distributed compression in acoustic sensor networks. A typical scenario consists of a set of microphones that record a sound source located at some unknown position. The goal then is to convey the corresponding audio signals to a central base station for processing. We thus aim at designing efficient distributed communication schemes that minimize the overall bit-rate needed in order to achieve a given reconstruction accuracy. In this paper, we show how the a priori knowledge of the system's geometry can be beneficially used in order to lower the transmission rates. We propose a distributed coding scheme for simple synthetic sources. These results are then applied to more general signals by means of oversampled analog-to-digital conversion. Simulation results confirm the effectiveness of our approach. | ||
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