| 摘要 |
PURPOSE: A circuit for eliminating a screen signal noise of a screen indicator is provided to output a screen signal in which the noise signal is eliminated without any damage in the edge by carrying out noise elimination filtering. CONSTITUTION: The circuit of a screen indicator comprises an edge detection measurement (31) which detects and outputs the edge part of the input screen signal; an edge amplification measurement(20) which outputs the signal which is above a certain level and eliminate the signal that is below a certain level; a noise detection measurement which detects noise signal among the output signal of the edge detection measurement(31); and a screen noise eliminating measurement which carries out noise elimination filtering. The noise signal is eliminated without any damage accordingly.
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