US 12,231,698 B2
Filter parameter signaling in video picture headers
Ye-kui Wang, San Diego, CA (US); and Jizheng Xu, San Diego, CA (US)
Assigned to Bytedance Inc., Los Angeles, CA (US)
Filed by Bytedance Inc., Los Angeles, CA (US)
Filed on Jun. 15, 2023, as Appl. No. 18/335,317.
Application 18/335,317 is a continuation of application No. 17/977,492, filed on Oct. 31, 2022.
Application 17/977,492 is a continuation of application No. PCT/US2021/029416, filed on Apr. 27, 2021.
Claims priority of provisional application 63/017,499, filed on Apr. 29, 2020.
Prior Publication US 2023/0328294 A1, Oct. 12, 2023
Int. Cl. H04N 19/00 (2014.01); H04N 19/176 (2014.01); H04N 19/186 (2014.01); H04N 19/70 (2014.01); H04N 19/86 (2014.01)
CPC H04N 19/86 (2014.11) [H04N 19/176 (2014.11); H04N 19/186 (2014.11); H04N 19/70 (2014.11)] 20 Claims
OG exemplary drawing
 
1. A video processing method, comprising:
performing a conversion between a video picture of a video and a bitstream of the video,
wherein the conversion comprises performing a deblocking filtering operation in which at least some samples of reconstructed video blocks are selectively filtered using a deblocking filter whose parameters are indicated,
wherein a first syntax element in a first video unit level specifying a deblocking parameter offset for β divided by 2 applied to a chroma component for one or more slices in a first video unit and a second syntax element in the first video unit level specifying a deblocking parameter offset for tC divided by 2 applied to the chroma component for the one or more slices in the first video unit are determined according to a rule in response to the first syntax element and the second syntax element not included in the bitstream,
wherein the rule specifies that (1) in case a syntax flag indicating that chroma tool offsets are present in a picture parameter set, the first syntax element is equal to a third syntax element in a second video unit level specifying the deblocking parameter offset for β divided by 2 applied to a chroma component associated with a second video unit, and the second syntax element is equal to a fourth syntax element in the second video unit level specifying the deblocking parameter offset for tC divided by 2 applied to the chroma component associated with the second video unit, and (2) in case the syntax flag indicating that the chroma tool offsets are not present in the picture parameter set, the first syntax element is equal to a fifth syntax element in the first video unit level specifying the deblocking parameter offset for β divided by 2 applied to a luma component for the one or more slices in the first video unit, and the second syntax element is equal to a sixth syntax element in the first video unit level specifying the deblocking parameter offset for tC divided by 2 applied to the luma component for the one or more slices in the first video unit,
wherein the first video unit level is a picture header, and wherein the second video unit level is the picture parameter set, and
wherein the first syntax element specifies the deblocking parameter offset for β divided by 2 applied to a chroma component for slices in a current picture and the second syntax element specifies the deblocking parameter offset for tC divided by 2 applied to the chroma component for slices in the current picture.