US 11,889,074 B2
Systems and methods for deriving quantization parameters for video blocks in video coding
Frank Bossen, Vancouver, WA (US); Kiran Mukesh Misra, Vancouver, WA (US); Christopher Andrew Segall, Vancouver, WA (US); and Weijia Zhu, Sakai (JP)
Assigned to SHARP KABUSHIKI KAISHA, Sakai (JP); and FG Innovation Company Limited, Tuen Mun (HK)
Appl. No. 17/422,917
Filed by SHARP KABUSHIKI KAISHA, Sakai (JP); and FG Innovation Company Limited, Tuen Mun (HK)
PCT Filed Jan. 15, 2020, PCT No. PCT/JP2020/001060
§ 371(c)(1), (2) Date Jul. 14, 2021,
PCT Pub. No. WO2020/149298, PCT Pub. Date Jul. 23, 2020.
Claims priority of provisional application 62/793,515, filed on Jan. 17, 2019.
Claims priority of provisional application 62/793,305, filed on Jan. 16, 2019.
Prior Publication US 2022/0094923 A1, Mar. 24, 2022
Int. Cl. H04N 19/119 (2014.01); H04N 19/105 (2014.01); H04N 19/132 (2014.01); H04N 19/176 (2014.01); H04N 19/96 (2014.01)
CPC H04N 19/119 (2014.11) [H04N 19/105 (2014.11); H04N 19/132 (2014.11); H04N 19/176 (2014.11); H04N 19/96 (2014.11)] 15 Claims
OG exemplary drawing
 
1. A method of coding of video data, the method comprising:
deriving a predicted luma quantization parameter by using a tree type specifying whether a single tree or a dual tree is used to partition a coding tree; and
generating a luma quantization parameter by using the predicted luma quantization parameter, wherein:
the predicted luma quantization parameter is set equal to a luma quantization parameter of a coding unit containing a luma coding block covering a neighboring location when a first condition of a current quantization group is true and a second condition of a neighboring block availability is true, and
the neighboring location is located above the current quantization group.