Patent ID: 6992729
Filing Date: 2006-01-31
Classification: H04N

Abstract:
1. A video processing method for displaying an image input as a video signal comprising the steps of: dividing an input data region representative of a range of digital luminance data into a plurality of regions comprising substantially all of said input data region; selecting one of a plurality of output data correction characteristics, each of said plurality of output data correction characteristics being non-linear as a whole, but comprising a linear portion coextensive with each of said plurality of regions and having different slopes in at least two of said regions; wherein at least one of said output data characteristics is a trapezoidal characteristic which is nonlinear and continuous as a whole and consists of a linear portion in said first region where the gain is greater than one, a linear portion in said second region where the gain is equal to one exactly or approximately, and a linear portion in said third region where the gain is smaller than one; and wherein at least one of said output data characteristics is an S-shaped characteristic which is nonlinear and continuous as a whole and consists of linear portions in said first and third regions where the gain is smaller than one, and a linear portion in said second region where the gain is greater than one; and correcting digital luminance data corresponding to said video signal included in said plurality of regions in accordance with the selected output data correction characteristic; wherein said plurality of output data correction characteristics are selected based on an identification information inserted in said video signal to identify said image.