A method of encoding a first set of images of video sequence according to a first set of encoding parameters, in which the first set of encoding parameters defines a set of parameters usable to encode each image of the first set of images, the method comprising: reducing the size of images of the first set of images depending on a scale factor for generating a second set of images corresponding to the video sequence; generating, for each image of the second set of images, second encoding data according to a second set of encoding parameters, the second set of encoding parameters defining the set of parameters used to encode each image of the second set of images, and the second encoding data defining encoding information identifying a choice of encoding parameters from the second set of encoding parameters; determining, for each image of the first set of images, first encoding data by respective scale transposition, depending on the scale factor, second encoding data generated for the corresponding image in the second set of images, the first encoding data identifying a choice of encoding parameters from the first set of encoding parameters, and comprising first partitioning data defining a partitioning of the image into encoding blocks and first predictive coding data of the encoding blocks derived from the partitioning; determining, for at least one encoding block of an image of the first set of images, respective pixel residuals representing a distance between the pixels of the encoding block and the pixels of the prediction block of the encoding block determined from the predictive coding data obtained for the encoding block by scale transposition of the second encoding data; applying, for the at least one encoding block of an image of the first set of images, a block transformation to the pixel residuals determined for the encoding block, and inserting the transformed pixel residuals and the first encoding data in a binary encoding stream of the first set of images, wherein the second encoding data further comprises, for a current image of the second set of images, block transformation data, the method further comprising: - for each encoding block derived from a partitioning of the current image of the second set of images, selecting, in a set of block transformation parameters, block transformation parameters for applying a block transform to the residual determined for said encoding block resulting from the partitioning of the current image of the second set of images, and generating second block transformation data depending on the selected transformation parameter; - determining, for each encoding block of each image of the first set of images, first block transformation data by scale transposition, depending on the scale factor, of the second block transformation data; and applying, on the determined pixel residuals for the encoding block of the image of the first set of images, the block transformation depending on the first block transformation data. reducing the size of images of the first set of images depending on a scale factor for generating a second set of images corresponding to the video sequence; generating, for each image of the second set of images, second encoding data according to a second set of encoding parameters, the second set of encoding parameters defining the set of parameters used to encode each image of the second set of images, and the second encoding data defining encoding information identifying a choice of encoding parameters from the second set of encoding parameters; determining, for each image of the first set of images, first encoding data by respective scale transposition, depending on the scale factor, second encoding data generated for the corresponding image in the second set of images, the first encoding data identifying a choice of encoding parameters from the first set of encoding parameters, and comprising first partitioning data defining a partitioning of the image into encoding blocks and first predictive coding data of the encoding blocks derived from the partitioning; determining, for at least one encoding block of an image of the first set of images, respective pixel residuals representing a distance between the pixels of the encoding block and the pixels of the prediction block of the encoding block determined from the predictive coding data obtained for the encoding block by scale transposition of the second encoding data; applying, for the at least one encoding block of an image of the first set of images, a block transformation to the pixel residuals determined for the encoding block, and inserting the transformed pixel residuals and the first encoding data in a binary encoding stream of the first set of images, - for each encoding block derived from a partitioning of the current image of the second set of images, selecting, in a set of block transformation parameters, block transformation parameters for applying a block transform to the residual determined for said encoding block resulting from the partitioning of the current image of the second set of images, and generating second block transformation data depending on the selected transformation parameter; - determining, for each encoding block of each image of the first set of images, first block transformation data by scale transposition, depending on the scale factor, of the second block transformation data; and