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Proceedings Paper

Parallel computation of radio listening rates
Author(s): Marc Mazzariol; Benoit A. Gennart; Roger David Hersch; Manuel Gomez; Peter Balsiger; Fausto Pellandini; Markus Leder; Daniel Wuethrich; Juerg Feitknecht
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Paper Abstract

Obtaining the listening rates of radio stations in function of time is an important instrument for determining the impact of publicity. Since many radio stations are financed by publicity, the exact determination of radio listening rates is vital to their existence and to further development. Existing methods of determining radio listening rates are based on face to face interviews or telephonic interviews made with a sample population. These traditional methods however require the cooperation and compliance of the participants. In order to significantly improve the determination of radio listening rates, special watches were created which incorporate a custom integrated circuit sampling the ambient sound during a few seconds every minutes. Each watch accumulates these compressed sound samples during one full week. Watches are then sent to an evaluation center, where the sound samples are matched with the sound samples recorded from candidate radio stations. The present paper describes the processing steps necessary for computing the radio listening rates, and shows how this application was parallelized on a cluster of PCs using the CAP Computer-aided parallelization framework. Since the application must run in a production environment, the paper describes also the support provided for graceful degradation in case of transient or permanent failure of one of the system's components. The parallel sound matching server offers a linear speedup up to a large number of processing nodes thanks to the fact that disk access operations across the network are done in pipeline with computations.

Paper Details

Date Published: 9 October 2000
PDF: 8 pages
Proc. SPIE 4118, Parallel and Distributed Methods for Image Processing IV, (9 October 2000); doi: 10.1117/12.403598
Show Author Affiliations
Marc Mazzariol, Ecole Polytechnique Federale de Lausanne (Switzerland)
Benoit A. Gennart, Ecole Polytechnique Federale de Lausanne (Switzerland)
Roger David Hersch, Ecole Polytechnique Federale de Lausanne (Switzerland)
Manuel Gomez, Univ. de Neuchatel (Switzerland)
Peter Balsiger, Univ. de Neuchatel (Switzerland)
Fausto Pellandini, Univ. of Neuchatel (Switzerland)
Markus Leder, IBW AG Software (Switzerland)
Daniel Wuethrich, IBW AG Software (Switzerland)
Juerg Feitknecht, Liechti AG (Switzerland)


Published in SPIE Proceedings Vol. 4118:
Parallel and Distributed Methods for Image Processing IV
Hongchi Shi; Patrick C. Coffield; Divyendu Sinha, Editor(s)

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