Flipped Templates for Reconstruction-Reordered Intra Block Copy

A method comprising:

• determining a block vector difference (BVD) based on a difference between a block vector (BV), of a current block (CB), and a block vector predictor (BVP);
• determining a plurality of candidate templates, for a plurality of reference block (RB) candidates associated with a plurality of BVD candidates, that are flipped in a direction relative to a current template for the CB;
• based on comparisons between the current template and each of the candidate templates of the RB candidates associated with the BVD candidates, determining a plurality of template matching costs for the plurality of BVD candidates;
• based on the plurality of template matching costs, selecting a BVD candidate, of the BVD candidates, as a BVD predictor;
• and
• encoding an indication of whether a value of a symbol of the BVD matches a value of a symbol of the BVD predictor.

A method comprising:

• determining a plurality of candidate templates, for a plurality of reference block (RB) candidates associated with a plurality of block vector differences (BVD) candidates, based on a current template for a current block (CB), wherein each candidate template, of the plurality of candidate templates, has a shape, of the current template, flipped in a direction;
• based on a comparison between the current template and each candidate template of the plurality of candidate templates, determining a plurality of template matching costs corresponding to the plurality of BVD candidates;
• based on the plurality of template matching costs, selecting a BVD candidate, of the plurality of BVD candidates, as a BVD predictor;
• decoding information based on a BVD and the BVD predictor;
• and
• determining, based on the decoded information, a value of a symbol of the BVD.