	US 11,743,459 B2
	Filtering process for video coding
Marta Karczewicz, San Diego, CA (US); Hongtao Wang, San Diego, CA (US); Jianle Chen, San Diego, CA (US); and Venkata Meher Satchit Anand Kotra, Munich (DE)
Assigned to QUALCOMM INCORPORATED, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Sep. 23, 2021, as Appl. No. 17/448,547.
Claims priority of provisional application 63/085,094, filed on Sep. 29, 2020.
Prior Publication US 2022/0103816 A1, Mar. 31, 2022
Int. Cl. H04N 19/117 (2014.01); H04N 19/82 (2014.01); H04N 19/176 (2014.01); H04N 19/70 (2014.01); H04N 19/132 (2014.01)

CPC H04N 19/117 (2014.11) [H04N 19/132 (2014.11); H04N 19/176 (2014.11); H04N 19/70 (2014.11); H04N 19/82 (2014.11)]

54 Claims

1. A method of filtering decoded video data, the method comprising:

decoding a block of video data to form a decoded block;

applying a filter to the decoded block to form a filtered block;

multiplying samples of the filtered block by a scaling factor to form a refined filtered block; and

adding values of samples of the refined filtered block to corresponding values of samples of the decoded block to form a resulting block of a decoded picture stored to a decoded picture buffer, wherein the filter comprises a first filter, the filtered block comprises a first filtered block, the refined filtered block comprises a first refined filtered block, and the scaling factor comprises a first scaling factor, the method further comprising:

applying a second filter to the decoded block to form a second filtered block; and

multiplying samples of the second filtered block by a second scaling factor to form a second refined filtered block,

wherein adding the values of the samples of the first refined filtered block to the corresponding values of the samples of the decoded block comprises adding the values of the samples of the first refined filtered block and corresponding values of samples of the second refined filtered block with the corresponding values of the samples of the decoded block.