| 摘要 |
PURPOSE:To emphasize a fine contour by generating a vertical contour component according to a processing between scanning lines at positions mutually adjacent on a final skip scanning screen. CONSTITUTION:An addition circuit 10 complets a vertical contour compensation in the step of the horizontal scanning line of H/2. From a horizontal synchronizing signal (frequency fH, scanning line length 1H) 13 via a switching pulse generating circuit 14, the scanning line length conversion from H/2 to H is carried out in time base extension circuits 15, 16 according to this pulse. A writing is executed by a clock frequency 2fc17 and a reading is executed by the used of a clock frequency fc18. Thereby, the contour is sharply compensated to obtain an easily viewed television picture.
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