US 10,477,203 B2 · Method and apparatus for palette table prediction

Abstract

A method for palette coding is disclosed. In an encoder side, the method determines whether a first block is coded using a palette coding mode or a non-palette coding. If the first block is coded using the non-palette coding mode, a first color table for the first block is derived based on one or more color tables associated with one or more previously processed blocks. If the first block is coded using the palette coding mode, the first color table is derived from the first block. A second block coded after the first block may use the first color table as a palette prediction. At the decoder side, if the current block is coded using the palette coding mode, a first color table based on a previous coded block is derived and the current block is decoded using a first color table as a palette predictor.

Claims24

Dependent claims

A method of encoding video data in a video coding system, the method comprising:

for a first block that is coded using a palette coding mode,
obtaining a first palette for palette coding the first block, and
storing a first reference palette associated with the first block according to the obtained first palette;
for a second block that is coded using a non-palette coding mode,
setting a previously stored reference palette as a second reference palette associated with the second block;
receiving input data associated with a third block, wherein the second block is coded prior to the third block;
and
when the third block is to be coded using the palette coding mode,
deriving a third palette for palette coding the third block based on at least the second reference palette associated with the second block, and
palette coding the third block using the derived third palette.

7 more elements

Dependencies are inferred from the claim text.

Method and apparatus for palette table prediction

Life of this patent

Method and apparatus for palette table prediction

Life of this patent

Abstract

Claims24