Method of constructing an image suitable for being displayed on a display system from a plurality of objects and descriptors, each descriptor being associated with each object, a descriptor including graphic parameters defining the nature of the associated object and display parameters for displaying the associated object, for each video frame of the display system, the image is constructed line-by-line by carrying out the following steps: - for each line of the display system, on-the-fly construction of this line by retrieving and storing, in real time, in one line buffer, all the pixels relating to the objects intended to be displayed on said line, in order to do this the method further comprising following step: - identification indenpendently of each object that must be present on this line according to a set of variables specific to each object; - detection in each object thus identified, a useful zone corresponding to the considered line; and - conversion of the raw data coming from said useful zone into pixels compatible with the display format, - for each pixel of the useful zone and for each identified object, writing a pixel in the line buffer, this pixel is intended to be displayed on a given position on a line of the display system, firstly the position of this pixel in the considered line is determined, and this first pixel is blended with a second pixel currently stored in the line buffer at said same given position, the blender being applied proportionally to the level of transparency of said first pixel; - sending these pixels to the display system according to a pixels sequence, such that the complete image is formed only on said display system; the line construction mechanism being line- and frame-synchronized with the display system. - for each line of the display system, on-the-fly construction of this line by retrieving and storing, in real time, in one line buffer, all the pixels relating to the objects intended to be displayed on said line, in order to do this the method further comprising following step: - identification indenpendently of each object that must be present on this line according to a set of variables specific to each object; - detection in each object thus identified, a useful zone corresponding to the considered line; and - conversion of the raw data coming from said useful zone into pixels compatible with the display format, - for each pixel of the useful zone and for each identified object, writing a pixel in the line buffer, this pixel is intended to be displayed on a given position on a line of the display system, firstly the position of this pixel in the considered line is determined, and this first pixel is blended with a second pixel currently stored in the line buffer at said same given position, the blender being applied proportionally to the level of transparency of said first pixel; - sending these pixels to the display system according to a pixels sequence, such that the complete image is formed only on said display system; the line construction mechanism being line- and frame-synchronized with the display system. - identification indenpendently of each object that must be present on this line according to a set of variables specific to each object; - detection in each object thus identified, a useful zone corresponding to the considered line; and - conversion of the raw data coming from said useful zone into pixels compatible with the display format, - for each pixel of the useful zone and for each identified object, writing a pixel in the line buffer, this pixel is intended to be displayed on a given position on a line of the display system, firstly the position of this pixel in the considered line is determined, and this first pixel is blended with a second pixel currently stored in the line buffer at said same given position, the blender being applied proportionally to the level of transparency of said first pixel; - sending these pixels to the display system according to a pixels sequence, such that the complete image is formed only on said display system; the line construction mechanism being line- and frame-synchronized with the display system.