CPC H04N 19/119 (2014.11) [H04N 19/159 (2014.11); H04N 19/176 (2014.11); H04N 19/186 (2014.11); H04N 19/96 (2014.11)] | 14 Claims |
1. A method of coding implemented by a decoding apparatus, comprising:
obtaining information of intra sub-partitions (ISP), wherein the information of ISP indicates whether ISP is used for splitting a luma coding block of a coding unit;
determining a size of a chroma transform block (TB) of the coding unit based on SubWidthC and SubHeightC when at least a first condition is fulfilled, wherein SubWidthC and SubHeightC are variables depending on chroma format information, wherein the chroma format information indicates a chroma format of a picture the coding unit belongs to, the chroma format includes at least one of: 4:2:2, or 4:4:4, and wherein the first condition comprises: 1) a single tree is used to partition the coding unit, and 2) the information of ISP indicates that ISP is used for splitting the luma coding block;
wherein the size of the chroma transform block satisfies:
wC=CbWidth[x0][y0]/SubWidthC; and
hC=CbHeight[x0][y0]/SubHeightC;
wherein wC represents a width of the chroma transform block, hC represents a height of the chroma transform block, CbWidth represents a width of the luma coding block, and CbHeight represents a height of the luma coding block.
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