Abstract: A method (1) of processing signals by means of rescaling, comprising the steps of: —downscaling (10) an initial signal (11), in accordance with a predetermined downscaling factor (Df) to obtain a downscaled signal (12), —upscaling (20), the downscaled signal (12) to obtain an upscaled signal (13) having the same dimensions as said initial signal (11), —comparing (30) the initial signal (11) and the upscaled signal (13) to calculate a comparison parameter, —if said comparison parameter is within a previously defined range, decreasing (50) the downscaling factor (Df) and repeating the steps of downscaling (10), upscaling (20) and comparison (30), —if said comparison parameter is outside the previously defined range, encoding (40) an encoded signal (14) as a function of the downscaled signal (12).