INTERPOLATION OF AUDIO SIGNALS WITH SUPERPOSED AWGN USING THIRD AND FIFTH ORDER CONVOLUTION KERNELS - COMPARATIVE ANALYSIS
Keywords:
interpolation, convolution, interpolation kernel, optimal parameterAbstract
In the first part of the paper, convolutional interpolation with parametric interpolation kernels is described. After that, one-parameter (1P) convolutional kernels of the third and fifth order are described. In order to test the precision of convolutional interpolation with implemented 1P kernels of the third and fifth order, an experiment was conducted. The experiment is described in the second part of the paper. Interpolation of audio test signals, both musical and sine, was performed. AWGN interference was superimposed on the test signals, in the range of SNR {-10, -5, 0, 5, 10, 20, 30, 40}dB. Interpolation accuracy was measured using the mean square error (MSE). By minimizing the MSE, the optimal values of the kernel parameter were determined. Experimental results are presented in tables and graphs. At the end, a detailed comparative analysis of the estimation efficiency was performed, between the single-parameter kernel of the third and fifth order.
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