| 摘要 |
PURPOSE:To obtain a visually stable picture with high resolution without color blinking by using a 2-dimensional band pass filter so as to extract a 2-dimensional frequency band being a cause to cross color and applying contour correction to a signal subjected to cross color elimination. CONSTITUTION:Signals same as an original signal fOH(t), a 1H delay signal f1H(t) and a 2H delay signal f2H(t) to from a contour signal are used and a signal near the frequency band (525/4 lines for vertical and 3.58MHz for horizontal) being a cause to the cross color is extracted by using the 2-dimensional band pass filter 16 in terms of 2-dimension. The signal is subtracted from the 1H delay signal f1H(t) subjected to contour emphasis by a subtractor 18, and a contour signal obtained by an enhancer circuit 11 is added (14) to the signal subjected to the cross color elimination to obtain a picture with high resolution while no color blinking is observed.
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