Patent ID: 6278496
Filing Date: 2001-08-21
Classification: G09G,H04N

Abstract:
A digital .gamma. correction circuit that corrects digital input data based on a .gamma. correction crossover line to generate digital output data, which respectively fixes a plurality of crossover point positions in the input data axial direction of said .gamma. correction crossover line in the form of fixed positions, is able to specify predetermined slope data respectively corresponding to a plurality of regions formed bordering on the fixed positions, said circuit comprising:a crossover point arithmetic processing circuit, which performs arithmetic processing on crossover point positions in the output data axial direction of said .gamma. correction crossover line at each of said plurality of regions using said specified slope data and said fixed positions prior to input of said input data;and, a real-time processing circuit, which performs .gamma. correction on a real-time basis on said input data based on crossover point positions in said output data axial direction arithmetically processed with said crossover point arithmetic processing circuit and said specified slope data to generate said corresponding output data.