| 摘要 |
A correction circuit for improving the contour sharpness or quality of video images in devices wherein the video signals are converted into digital form. An even number of series connected multi-stage shift registers is provided, whose inputs are each connected by means of a related multiplier with inputs of an adder. The outputs of the last shift register are connected by means of a further multiplier with further inputs of the adder. Moreover, the multiplication factors of the multipliers form a symmetrical series having an absolute maximum at the center of the series, and the absolute value of the multiplication factor of the intermediate multiplier is greater than the absolute value of all other multiplication factors. The sign of the intermediate multiplier or multiplication factor is opposite to the sign of the algebraic sum of all other multiplication factors. |
