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Author: search.filters.author.Sangaroon, O.Subject: search.filters.subject.Bernstein polynomials

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    A mathematical model for ECG waveform using rational Bézier curves and Bernstein polynomials
    (2014-01-01)
    Chutchavong, V.
    ;
    Nualon, K.
    ;
    Sangaroon, O.
    ;
    Janchitrapongvej, K.
    This paper presents a mathematical model for ECG waveform using Rational Bezier curves and Bernstein polynomials. There are three mathematical models; the Bernstein polynomials model, the Bézier-Bernstein model and the Rational Bézier-Bernstein model. All mathematical models can generate the ECG waveform which is similar to the normal ECG waveform. Moreover, all mathematical models can simulate a normal ECG waveform as well. As the results, the Rational Bezier-Bernstein model is a simple form, easy to make a circuit and lower cost in the implementation of the ECG waveform. © 2014 IEEE.
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    An IIR digital video equalizer design with the bernstein polynomial and generalized bilinear transformation for gain chrominance distortion
    (2008-12-01)
    Chutchavong, V.
    ;
    Sangaroon, O.
    ;
    Pirajnanchai, V.
    ;
    Janchitrapongvej, K.
    Video equalizer design for compensated the distortion of the chrominance amplitude in color television transmission system is presented. The approximation is based on the Bernstein Polynomials and generalized bilinear transformation to obtain the transfer function. This approach has several parameters can be varied satisfying stability conditions. And the advantages of the Bernstein Polynomials when compared to the Butterworth, Chebyshev and Thomson Polynomials are three parameters available control the amount of phase and magnitude, linear phase, and flexible for variable of phase. Among all referred advantages so that these methodologies were applied in this paper. In addition, the pulse and bar test signal which has been used to measure linear waveform distortion in TV system is special the modulated 20T sine squared pulse with color sub-carrier 4.43 MHz for PAL system. As a result, the proposed digital video equalizer can be enhance and compress the gain chrominance distortion without degraded it phase characteristic.