US 12,470,705 B2
Fractional-pel block vector for video coding
Chun-Chi Chen, San Diego, CA (US); Bappaditya Ray, San Diego, CA (US); Hongtao Wang, San Diego, CA (US); Vadim Seregin, San Diego, CA (US); Marta Karczewicz, San Diego, CA (US); and Han Huang, San Diego, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Jan. 10, 2024, as Appl. No. 18/408,928.
Claims priority of provisional application 63/493,093, filed on Mar. 30, 2023.
Claims priority of provisional application 63/479,720, filed on Jan. 12, 2023.
Prior Publication US 2024/0244197 A1, Jul. 18, 2024
Int. Cl. H04N 19/00 (2014.01); H04N 19/117 (2014.01); H04N 19/159 (2014.01); H04N 19/176 (2014.01); H04N 19/186 (2014.01); H04N 19/70 (2014.01); H04N 19/80 (2014.01)
CPC H04N 19/117 (2014.11) [H04N 19/159 (2014.11); H04N 19/176 (2014.11); H04N 19/186 (2014.11); H04N 19/70 (2014.11); H04N 19/80 (2014.11)] 19 Claims
OG exemplary drawing
 
1. A method of encoding or decoding video data, the method comprising:
determining a block vector for a current block of a current picture, the block vector identifying a fractional-pel position between reference samples in the current picture and having a fractional-pel resolution that is less than integer-pel resolution;
determining that a block vector difference (BVD) between a block vector predictor for the current block and the block vector for the current block is zero;
determining that the fractional-pel resolution is quarter-pel when the BVD is zero;
generating a prediction block from reference samples in the current picture based on the fractional-pel position; and
encoding or decoding the current block based on the prediction block.