METHOD AND APPARATUS FOR ENCODING OR DECODING A PALETTE IN PALETTE CODING MODE

摘要

The invention concerns a method and a device for processing a current pixel block of an image using a palette prediction mode according to HEVC RExt. The mode uses a current palette to build a predictor block of indexes to predict the current pixel block. The current palette comprises entries associating entry indexes with pixel values. The method comprises predicting the current palette using a palette predictor built from the two or more palettes. A first palette of the two or more palettes is used in processing another block of pixels of the image, at least one entry of said first palette being predictable using a second palette of the two or more palettes and flags, each flag indicating whether or not a corresponding entry of the second palette is to be used in predicting the first palette. Accordingly, the coding of the palette mode is improved.