11. The digital television decoder as claimed in claim 9 , wherein the pixmaps are chopped into rectangles which are drawn successively with each call of a background task.
13. The digital television decoder as claimed in claim 11 , wherein each call of the background task, comprises: reorganization of the pixmaps after a scroll of the document has been performed, and when no repositioning of the pixmaps has occurred, drawing of the first rectangle of a pixmap determined as a function of distance away from the visible part of the documents.