US 12,355,964 B2
High-level constraint flag for local chroma quantization parameter control
Philippe De Lagrange, Betton (FR); Karam Naser, Mouaze (FR); Philippe Bordes, Laille (FR); and Fabrice Leleannec, Betton (FR)
Assigned to INTERDIGITAL CE PATENT HOLDINGS, SAS, Paris (FR)
Appl. No. 17/910,047
Filed by INTERDIGITAL CE PATENT HOLDINGS, SAS, Paris (FR)
PCT Filed Mar. 8, 2021, PCT No. PCT/EP2021/055776
§ 371(c)(1), (2) Date Sep. 8, 2022,
PCT Pub. No. WO2021/180649, PCT Pub. Date Sep. 16, 2021.
Claims priority of application No. 20305258 (EP), filed on Mar. 12, 2020.
Prior Publication US 2023/0096533 A1, Mar. 30, 2023
Int. Cl. H04N 19/70 (2014.01); H04N 19/124 (2014.01); H04N 19/176 (2014.01)
CPC H04N 19/124 (2014.11) [H04N 19/176 (2014.11); H04N 19/70 (2014.11)] 18 Claims
OG exemplary drawing
 
1. An apparatus, comprising:
a processor, configured to perform:
quantizing at least one video block based on at least one quantization parameter that is used for chroma quantization; and,
encoding said quantized at least one video block and syntax indicative of said at least one quantization parameter, and said syntax comprises a flag to disable local chroma quantization parameter control, wherein said syntax comprises a no_chroma_qp_offset_constraint_flag.