Abstract: An apparatus includes a processor that is configured to select a palette entry in the palette for coding a value of a pixel of the image block; obtain respective palette indexes of neighboring pixels of the pixel; select, using the respective palette indexes, an entropy code for coding an index of the palette entry; and code the palette entry using the entropy code. A method includes obtaining respective palette indexes of neighboring pixels of a pixel of the image block; selecting an entropy code using the respective palette indexes; decoding, from a encoded bitstream, an index of a palette entry; and setting a value of the pixel using the palette entry.

Abstract: An apparatus includes a processor that is configured to select a palette entry in the palette for coding a value of a pixel of the image block; obtain respective palette indexes of neighboring pixels of the pixel; select, using the respective palette indexes, an entropy code for coding an index of the palette entry; and code the palette entry using the entropy code. A method includes obtaining respective palette indexes of neighboring pixels of a pixel of the image block; selecting an entropy code using the respective palette indexes; decoding, from a encoded bitstream, an index of a palette entry; and setting a value of the pixel using the palette entry.

Abstract: Encoding using locally mixed colors is disclosed. A method for encoding an image block using palletization includes selecting a fixed palette for the image block, the fixed palette including fixed palette entries; selecting a mixed palette for the image block, the mixed palette including mixed palette entries, each mixed palette entry corresponding, respectively, to a pixel neighborhood, a mixing of the pixel neighborhood, and a manipulation of the mixing of the pixel neighborhood; determining a pixel map, the pixel map comprising, for a pixel of at least some pixels of the image block, a respective mapping to one of a fixed palette entry or a mixed palette entry; and encoding, in an encoded bitstream, the pixel map.

Abstract: Encoding using locally mixed colors is disclosed. A method for encoding an image block using palletization includes selecting a fixed palette for the image block, the fixed palette including fixed palette entries; selecting a mixed palette for the image block, the mixed palette including mixed palette entries, each mixed palette entry corresponding, respectively, to a pixel neighborhood, a mixing of the pixel neighborhood, and a manipulation of the mixing of the pixel neighborhood; determining a pixel map, the pixel map comprising, for a pixel of at least some pixels of the image block, a respective mapping to one of a fixed palette entry or a mixed palette entry; and encoding, in an encoded bitstream, the pixel map.