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In this paper both piecewise linear and piecewise uniform approximation ofprobability density function are performed. For the probability densityfunction approximated in these ways, a compressor function is formed. On thebasis of compressor function formed in this way, piecewise linear and piecewiseuniform companding quantizer are designed. Design of these companding quantizermodels is performed for the Laplacian source at the entrance of the quantizer.The performance estimate of the proposed companding quantizer models is done bydetermining the values of signal to quantization noise ratio (SQNR) andapproximation error for the both of proposed models and also by their mutualcomparison.

Design of companding quantizer for Laplacian source using the approximation of probability density function