Patent ID: 6894664

Claim:
Method for processing video pictures especially for dynamic false contour effect compensation, the video picture consisting of pixels having at least one colour component (RGB) the colour component values being digitally coded with a digital code word, hereinafter called sub-field code word (SF-R, SF-G, F-B) wherein t each bit of a sub-field code word (SF-R, SF-G, SF-B) a certain duration is assigned hereinafter called sub-field, during which a colour component of the pixel can be activated for light generation, with the digital code words having n bit, characterised in that among the set p possible video levels for the a least one colour component (RGB) a sub-set of m video levels with n<m<p is selected which is used for light generation, wherein the m values are selected according to the rule that the temporal centre of gravity (CG 1 , CG 2 , CG 3 ) for the light generation of the corresponding sub-field code words grow continuously with the video level apart from possible exceptions in the low video level range up to a first predefined limit and/or in the high video level range from a second predefined limit on, wherein in case of a sub-field organization characterised by a specific number of sub-fields with a specific series of sub-field weights for a colour component value, more than one corresponding sub-field code word exists, the set of possible sub-field code words is reduced by taking only those sub-field code words for each video level, which have the minimum binary value for the case that in a sub-field code word the weight of each bit is ordered according to size; and wherein the decimated set of available sub-field code words is further reduced by selecting from the minimum binary value sub-field code words only those code words, in which never more than one consecutive “0”, inactivated sub-field, follow in between two “1” code word entries activated sub-field.