US 12,120,301 B2
Constraining operational bit depth of adaptive loop filtering for coding of video data at different bit depth
Dmytro Rusanovskyy, San Diego, CA (US); Luong Pham Van, San Diego, CA (US); and Marta Karczewicz, San Diego, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Sep. 2, 2021, as Appl. No. 17/465,149.
Claims priority of provisional application 63/085,957, filed on Sep. 30, 2020.
Prior Publication US 2022/0103825 A1, Mar. 31, 2022
Int. Cl. H04N 19/00 (2014.01); H04N 19/117 (2014.01); H04N 19/132 (2014.01); H04N 19/186 (2014.01); H04N 19/70 (2014.01); H04N 19/82 (2014.01)
CPC H04N 19/132 (2014.11) [H04N 19/117 (2014.11); H04N 19/186 (2014.11); H04N 19/70 (2014.11); H04N 19/82 (2014.11)] 22 Claims
OG exemplary drawing
 
1. A method of coding video data, the method comprising:
adjusting an input bit depth of reconstructed samples of video data to a fixed bit depth, wherein the fixed bit depth is different than the input bit depth and wherein adjusting the input bit depth comprises right bit shifting of a reconstructed sample value by a number of bits to generate a right-bit-shifted reconstructed sample value, wherein the number of bits is based on the input bit depth and an operational bit depth of a classifier;
classifying the reconstructed samples at the fixed bit depth;
determining a filter based on the classification;
adaptive loop filtering the reconstructed samples at the input bit depth based on the determined filter; and
processing the adaptive loop filtered samples.