US 12,149,706 B2
Signaling of gradual decoding refresh and reference picture lists
Ye-kui Wang, San Diego, CA (US); and Li Zhang, San Diego, CA (US)
Assigned to BYTEDANCE INC., Los Angeles, CA (US)
Filed by Bytedance Inc., Los Angeles, CA (US)
Filed on Nov. 17, 2022, as Appl. No. 17/989,339.
Application 17/989,339 is a continuation of application No. PCT/US2021/033351, filed on May 20, 2021.
Claims priority of provisional application 63/028,150, filed on May 21, 2020.
Prior Publication US 2023/0112461 A1, Apr. 13, 2023
Int. Cl. H04N 19/157 (2014.01); H04N 19/103 (2014.01); H04N 19/105 (2014.01); H04N 19/136 (2014.01); H04N 19/172 (2014.01); H04N 19/174 (2014.01); H04N 19/70 (2014.01)
CPC H04N 19/157 (2014.11) [H04N 19/103 (2014.11); H04N 19/105 (2014.11); H04N 19/136 (2014.11); H04N 19/172 (2014.11); H04N 19/174 (2014.11); H04N 19/70 (2014.11)] 20 Claims
OG exemplary drawing
 
1. A method of processing video data comprising:
performing a conversion between at least one picture of a video and a bitstream of the video according to a first rule and a second rule,
wherein the first rule specifies that when a picture is referred to by an inter-layer reference picture (ILRP) entry in a reference picture list of a slice of a first picture of the at least one picture, the picture is allowed to have a gradual decoding refresh (GDR) type and a syntax element specifying a recovery point of the picture in an output order is 0, and
wherein the picture is in a same access unit as the first picture, and
wherein the picture has a layer identifier that is smaller than a layer identifier of the first picture; and
wherein the second rule specifies that a default value of a syntax element specifying a number of entries in a reference picture list syntax structure associated with a reference picture list (RPL) index is equal to 0 due to a condition being satisfied, wherein the condition is satisfied in case (1) a second picture of the at least one picture is an instantaneous decoding refresh picture, (2) a first syntax flag specifies that RPL syntax elements are not present in a slice header of the slice, and (3) a second syntax flag specifies that RPL information is not present in a picture header of the second picture.