Patent ID: 8369423

Claim:
A method for coding a sequence of images into an H.264 coded data stream, each image being divided into blocks of pixels with each of which is associated at least one item of image data comprising the steps of: determining, for the image data, the prediction image data from reference image data, calculating residual data from said image data and said prediction image data, quantizing said residual data with a quantization step, reconstructing said image data into reconstructed image data, filtering said reconstructed image data according to two filtering parameters slice_alpha_c0_div2 and slice_beta_offset_div2 with a view to their use as reference image data, and coding said quantized residual data into said H.264 coded data stream, said coding further comprising the steps of: selecting a function representing the variations of said slice_alpha_c0_div2 and slice_beta_offset_div2 filtering parameters according to a quantization step value in a set of at least two functions using a value representative of a filtering intensity determined according to a desired visual effect, determining the value of said slice_alpha_c0_div2 and slice_beta_offset_div2 filtering parameters from said function selected and said quantization step.