1. A method of scalable coding of moving images using at least one reference image for at least one image to code, the method comprising: when a previous image of an initial quality level passes to a current image of an intended quality level different from the initial quality level and superior to the initial quality level: a first coding step of coding the current image as far as the intended quality level to provide a coded current image, a reconstructing step of reconstructing the current image at the intended quality level by using the coded current image and at least one reference image for the intended quality level, to provide a reconstructed current image of intended quality level, an obtaining step of obtaining at least one reference image of the current image at the initial quality level, to provide a reconstructed prediction image for the initial quality level, a determining step of determining a differential texture refinement depending on the reconstructed prediction image for the initial quality level and on the reconstructed current image of intended quality level, and a second coding step of coding the differential texture refinement.