Patent ID: 6370275
Filing Date: 2002-04-09
Classification: G09G

Abstract:
A process for scanning cells of a matrix-controlled display for displaying grey levels of a video signal, a scan including sub-scans relating to bits of column control words, the process comprising:coding the video signal on a number of bits greater, by a value p, than the number of sub-scans to deliver video coding words; and, estimating the contents of an image by determining, on the complete image, a number of times for which each of the first p most significant bits (MSB) of the video coding words takes the value â€œoneâ€ ; wherein, if the determined number of times is greater than or equal to at least one specified threshold, the p least significant bits of at least one of the video coding words are ignored in the course of coding the column control words, and in the case in which the determined number of times is less than the specified threshold, the p most significant bits are ignored in the course of coding the column control words, and a corresponding one of the sub-scans relating to said p most significant bits and for said image is assigned to the displaying of an item relating to the p least significant bits.