Equalization of Chrominance Gain Distortion Using Bernstein Polynomials

Abstract

This paper describes the design of linear chrominance gain slope equalizer for correcting the distortions in the video signal as they pass through the system under test. By the used of Fourier series, it is shown that the linear gain slop equalizer can be used to correct the linear chrominance gain inequality of the color subcarrier frequency at 4.43 MHz. As the results, it is seen that the proposed gain slope equalizer with linear phase characteristic whose amplitude characteristic has a linear rise or a steep drop in the color video frequency region. The approximated transfer function of linear gain slope is based on Bernstein polynomials. In addition, the composite modulated 20T sine squared pulse was chosen to investigate the performance of the proposed gain slope equalizer. Moreover, Mikhailov ‘s criteria for stability test is considered.