US 12,231,692 B2
Systems and methods for applying deblocking filters in video coding
Sachin G. Deshpande, Vancouver, WA (US)
Assigned to SHARP KABUSHIKI KAISHA, Sakai (JP)
Appl. No. 17/910,732
Filed by SHARP KABUSHIKI KAISHA, Sakai (JP)
PCT Filed Mar. 12, 2021, PCT No. PCT/JP2021/010119
§ 371(c)(1), (2) Date Sep. 9, 2022,
PCT Pub. No. WO2021/187375, PCT Pub. Date Sep. 23, 2021.
Claims priority of provisional application 62/991,519, filed on Mar. 18, 2020.
Prior Publication US 2023/0134652 A1, May 4, 2023
Int. Cl. H04N 19/70 (2014.01); H04N 19/117 (2014.01); H04N 19/124 (2014.01); H04N 19/169 (2014.01); H04N 19/172 (2014.01); H04N 19/186 (2014.01); H04N 19/86 (2014.01); H04N 19/157 (2014.01); H04N 19/177 (2014.01)
CPC H04N 19/70 (2014.11) [H04N 19/117 (2014.11); H04N 19/124 (2014.11); H04N 19/172 (2014.11); H04N 19/186 (2014.11); H04N 19/188 (2014.11); H04N 19/86 (2014.11); H04N 19/157 (2014.11); H04N 19/177 (2014.11)] 4 Claims
OG exemplary drawing
 
1. A method of decoding chroma component parameter information for decoding video data, the method comprising:
receiving a picture parameter set;
parsing a first flag in the picture parameter set, wherein the first flag specifies whether chroma tool offsets related syntax elements, pps_cb_qp_offset and pps_cr_qp_offset, are present in the picture parameter set and whether chroma deblocking offset syntax elements, pps_cb_beta_offset_div2, pps_cb_tc_offset_div2, pps_cr_beta_offset_div2, and pps_cr_tc_offset_div2, are present in the picture parameter set;
conditionally parsing the chroma tool offsets related syntax elements in the picture parameter set based on a value of the first flag;
parsing a second flag in the picture parameter set, wherein the second flag is a deblocking filter override enabled flag and specifies whether deblocking behavior may be overridden at a picture level or at a slice level;
conditionally parsing a third flag in the picture parameter set based on a value of the second flag, wherein the third flag is a deblocking filter information in picture header flag and specifies whether deblocking filter information is present in a picture header syntax structure and not present in slice headers referring to the picture parameter set;
conditionally parsing the chroma deblocking offset syntax elements in the picture parameter set based on the value of the first flag;
deriving quantization parameters based on the chroma tool offsets related syntax elements; and
performing a deblocking filter based on the chroma deblocking offset syntax elements,
wherein the second flag and the third flag are ordered in the picture parameter set between the chroma tool offsets related syntax elements and the chroma deblocking offset syntax elements.