US 12,382,072 B2
Luma mapping with chroma scaling for gradual decoding refresh
Limin Wang, San Diego, CA (US); Seungwook Hong, San Diego, CA (US); Krit Panusopone, San Diego, CA (US); and Miska Hannuksela, Tampere (FI)
Assigned to Nokia Technologies Oy, Espoo (FI)
Appl. No. 17/916,925
Filed by Nokia Technologies Oy, Espoo (FI)
PCT Filed Mar. 25, 2021, PCT No. PCT/EP2021/057748
§ 371(c)(1), (2) Date Oct. 4, 2022,
PCT Pub. No. WO2021/204553, PCT Pub. Date Oct. 14, 2021.
Claims priority of provisional application 63/007,200, filed on Apr. 8, 2020.
Prior Publication US 2023/0164338 A1, May 25, 2023
Int. Cl. H04N 19/44 (2014.01); H04N 19/172 (2014.01); H04N 19/186 (2014.01); H04N 19/30 (2014.01); H04N 19/46 (2014.01)
CPC H04N 19/44 (2014.11) [H04N 19/172 (2014.11); H04N 19/186 (2014.11); H04N 19/30 (2014.11); H04N 19/46 (2014.11)] 13 Claims
OG exemplary drawing
 
1. An apparatus comprising:
at least one processor; and
at least one memory storing instructions that, when executed with the at least one processor, cause the apparatus to:
access a picture to be decoded;
determine whether the picture is within a gradual decoding refresh period; and
based on determining that the picture is within the gradual decoding refresh period: prevent a chroma residual scaling from occurring to prevent a process of a luma mapping with chroma scaling process from being applied to the picture, wherein based on the determining, a syntax flag is set to a value indicating that a decoding process for chroma residual scaling associated with luma mapping with chroma scaling will not occur.