| 摘要 |
The invention relates to a method for deriving motion data for a macroblock of a high resolution picture, called high layer macroblock, from motion data of macroblocks of a low resolution picture, called base layer macroblock. The method comprises the following steps:-dividing (2100) the high layer macroblock in elementary blocks;-computing (2200), for each elementary block, an intermediate position within the low resolution picture from the elementary block position depending on the coding modes of the high layer macroblock and of the high and low resolution pictures;-identifying (2300) the base layer macroblock, called base_ MB, comprising the pixel located at the intermediate position;-computing (2400) a final position within the low resolution picture from the virtual base layer position depending on the coding modes of the base_ MB, of the high layer macroblock and of the high and low resolution pictures;-identifying (2500) the base layer macroblock, called real_ base_ MB, comprising the pixel located at the final position; and deriving (2600) motion data, for the high layer macroblock, from motion data of the identified real_ base_ MB. |
