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

摘要

The present invention relates to a method and a device for processing a current pixel block of an image using a palette prediction mode in accordance with HEVC RExt. Mode uses the current palette to build a predictor block of indices for predicting the current pixel block. The current palette includes entries that associate the entry indexes with the pixel values. The method includes predicting a current palette from two or more palette entries that are previously used palettes to process blocks of pixels. The palette predictor is used to determine whether a previously used palette has been copied from two or more palettes, preferably from the last used palette for the coding unit in the current coding entity, and whether the flag bitmap has been copied to the last used palette It can be used as constructed from a palette. Thus, the coding of the palette mode is improved.