Method and Apparatus for Palette Table Prediction

摘要

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.

主权项

1. A method of encoding a block of video data using palette coding in a video coding system, the method comprising:
determining whether a first block is coded using a palette coding mode or a non-palette coding mode; and receiving input data associated with a second block, wherein the first block is coded prior to the second block; if the first block is coded using the non-palette coding mode:
deriving a first color table for the first block 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:
deriving the first color table from the first block; and if the second block is determined to use the palette coding mode, applying palette coding to the second block using a palette predictor including a reference color table, wherein the reference color table is derived from one or more stored color tables, at least one of the one or more stored color tables is stored according to the first color table.