Patent ID: 8199831
Filing Date: 2012-06-12
Classification: G09G,H04N

Abstract:
1. A method for coding the video level of a current pixel of a colour component of a picture to be displayed on a display device into a code word belonging to at least a first code set or a second code set or both, the second code set being a subset of the first code set, the code words of the second code set being selected among the code words of the first code set according to the rule that the temporal centre of gravity for the light generation of the corresponding sub-field code words grows continuously with the video level of said code words by selecting certain levels, with an exception in which the temporal centre of gravity does not grow continuously in the low video level range up to a first predetermined number of low level code words or in the high video level range from a second predetermined number of high level code words or in both, comprising: