CIRCUIT TO UNDERSCORE OUTLINE Russian patent published in 2003 - IPC

FIELD: video technology. SUBSTANCE: invention is related to circuit of videopath for range of video frequencies. Given circuit is so designed that it isolates outline component HE from input brightness signal Y, evaluates its level, selects varying coefficient depending on this evaluation and multiplies isolated outline component by it. Obtained product is added to input brightness signal Y for output of brightness signal with underscored outline. Mentioned above coefficient changes according to set of variants depending on level of brightness of input signal Y and outline component is so controlled that it has value corresponding to level of brightness signal Y. EFFECT: design of circuit capable of underscoring outline corresponding to level of brightness of input videosignal. 4 cl, 3 dwg