CPC H04N 19/132 (2014.11) [H04N 9/77 (2013.01); H04N 19/117 (2014.11); H04N 19/136 (2014.11); H04N 19/17 (2014.11); H04N 19/186 (2014.11); H04N 19/70 (2014.11); H04N 19/80 (2014.11); H04N 19/82 (2014.11)] | 15 Claims |
1. A method of processing video data, comprising:
deriving, for a conversion between a video region of a video and a bitstream of the video, a first offset used in a cross-component filtering tool for a chroma sample of the video region, wherein the first offset is derived based on values of luma samples in a filter support region and filter coefficients, wherein the filter support region used for the cross-component filtering tool is a diamond shaped luma region;
deriving a second offset used in the cross-component filtering tool for the chroma sample based on using a clipping operation to the first offset, wherein the second offset is clipped to a given range; and
performing the conversion by applying the cross-component filtering tool to refine the chroma sample by adding the second offset offset to a value of the chroma sample, wherein the value of the chroma sample is modified by a chroma adaptive loop filter process before a refinement by the cross-component filtering tool.
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