Patent ID: 7002636
Filing Date: 2006-02-21
Classification: H04N

Abstract:
1. A contour corrector for processing an input video signal based on a unit period corresponding to a pixel to emphasize a contour component of the input signal, comprising: a first delay unit for generating a 2T-delayed input video signal by delaying the input video signal by twice the unit period, a first subtraction unit for generating a first primary differential signal by subtracting the first delayed input video signal from the input video signal, a second delay unit for generating a 2T-delayed primary differential signal by delaying the first primary differential signal by twice the unit period. a minimum absolute value computation unit for generating a minimum primary differential signal by selecting a smaller one of the first primary different lot signal and the 2T-delayed primary differential signal, a third delay unit for generating a 2T-delayed minimum primary differential signal by delaying the minimum primary differential signal by twice the unit period, a second subtraction unit for generating a secondary differential signal by subtracting the first delayed minimum primary differential signal from the minimum primary differential signal Se, a fourth delay unit for generating a 1t-delayed minimum primary differential signal by delaying the minimum primary differential signal by the unit period, a second minimum value unit for generating a first correction signal by selecting a smaller one of the secondary differential signal and the 1T-delayed minimum primary differential signal a computation unit for generating a second correction signal by subjecting the first correction signal and the 2T-delayed primary differential signal to a computation based on a predetermined function, a fifth delay unit, for delaying the 3T-delayed input video signal by delaying the input video signal by three times the unit period, and a third subtraction unit for generating a contour-corrected video signal by subtracting the second correction signal from the 3T-delayed input video signal.