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Low cost electric network signal and frequency recorder
This paper presents a low cost solution for a framework used for recording the electric network signal and for logging the fundamental frequency variations. The resulted database is used for time stamping audio recordings based on the Pearson correlation coefficient. Furthermore, we propose a fast algorithm for computing the Pearson correlation coefficient by emplying filters to implement efficiently mathematical operations involved in the process. The overall cost of the proposed framework is reduced ten times than its previous version.Author(s):
Valentin A. NITA
University Politehnica of Bucharest
Romania
Amelia CIOBANU
University Politehnica of Bucharest
Romania
Cristian NEGRESCU
University Politehnica of Bucharest
Romania
Dumitru STANOMIR
University Politehnica of Bucharest
Romania