CPC H04N 19/593 (2014.11) [G06T 9/004 (2013.01); G06T 11/001 (2013.01); G06T 11/40 (2013.01); G06V 10/20 (2022.01); H04N 19/105 (2014.11); H04N 19/119 (2014.11); H04N 19/132 (2014.11); H04N 19/159 (2014.11); H04N 19/176 (2014.11); H04N 19/186 (2014.11); H04N 19/1883 (2014.11); H04N 19/46 (2014.11)] | 20 Claims |
1. A method of video processing, comprising:
determining, for a conversion between a first video unit of a video comprising a luma block and two chroma blocks and a bitstream of the video, that a prediction mode is applied to the luma block and the two chroma blocks, respectively, wherein in the prediction mode, reconstructed samples are represented by a set of representative color values, and the set of representative color values comprises at least one of 1) palette predictors, 2) escaped samples, or 3) palette information included in the bitstream;
constructing, a first palette for the luma block based on a first palette prediction table, wherein the first palette is used to derive the reconstructed samples of the luma block;
constructing, a second palette for the two chroma blocks based on a second palette prediction table, wherein the second palette is used to derive the reconstructed samples of the two chroma blocks; and
performing the conversion based on the first palette and the second palette;
wherein the luma block and the two chroma blocks have tree type of dual tree,
wherein indications of a size of the first palette and indications of a size of the second palette are explicitly signaled separately, and
wherein sizes of the first palette prediction table and the second palette prediction table are implicitly signaled.
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