Patent ID: 6836293
Filing Date: 2004-12-28
Classification: G09G,H04N

Abstract:
An image processing method comprising:discriminating whether a display device is an impulse type display device; incorporating input frame pictures to be displayed on the display device, on the basis of an input picture signal and an input synchronizing signal that is synchronized with the input picture signal; recording the incorporated input frame pictures in an input frame memory; producing output frame pictures from the input frame pictures, which have been recorded in the input frame memory, by producing an interpolated picture or inserting a black raster picture or thinning out the input frame pictures, between input frame pictures corresponding to a picture information of the input frame picture to be displayed, on the basis of the picture information and the input synchronizing signal and an output synchronizing signal, the picture information including information that indicates whether the picture to be displayed is a moving picture or a still picture; and discriminating whether the picture to be displayed is a moving picture or a still picture, comprising: incorporating frame pictures to be displayed, at regular intervals on the basis of the input picture signal and the input synchronizing signal; obtaining a correlation between two frame pictures that have been continuously incorporated, the method discriminating whether the picture to be displayed is a moving picture or a still picture on the basis of the correlation result; and when it is determined that the picture to be displayed is a moving picture, determining whether the moving picture is in a first state in which the motion of a moving object in the moving picture is rapid, or in a second state in which the moving speed of the moving object is slower than that in the first state, on the basis of the correlation, wherein when it is discriminated that the display device is the impulse type display device, when it is discriminated that the picture to be displayed is a moving picture, and when it is determined that the moving speed of the moving object in the moving picture is in the second state, the producing of the output frame pictures comprises: comparing the refresh rate of the input frame pictures with the refresh rate of the output frame pictures; outputting the input frame pictures as the output frame picture, when the refresh rate of the input frame pictures is equal to the refresh rate of the output frame pictures; stopping the output of signals between the input frame pictures, or inserting and outputting a black raster picture, when the refresh rate of the output frame pictures is higher than the refresh rate of the input frame pictures; and thinning out the input frame pictures to produce and output the output frame pictures, when the refresh rate of the output frame pictures is lower than the refresh rate of the input frame pictures.