EDGE ENHANCEMENT CIRCUIT Russian patent published in 2003 - IPC

FIELD: video path circuits for video frequency range including edge enhancement circuits. SUBSTANCE: proposed circuit that functions to prevent excessive enhancement of pixel edge when vertical and horizontal components of edge are detected in case object picture should be displayed on background picture of plasma display panel is designed to detect horizontal edge component HE and vertical edge component VE, summing up detected components, multiplying sum obtained by random coefficient, and adding product obtained to input video signal. EFFECT: facilitated attainment of enhanced-edge output video signal. 3 cl, 3 dwg