US 12,407,865 B2
Coding of neighboring subpictures
Ye-kui Wang, San Diego, CA (US)
Assigned to BYTEDANCE INC., Los Angeles, CA (US)
Filed by Bytedance Inc., Los Angeles, CA (US)
Filed on Sep. 20, 2022, as Appl. No. 17/949,074.
Application 17/949,074 is a continuation of application No. PCT/US2021/022978, filed on Mar. 18, 2021.
Claims priority of provisional application 62/992,724, filed on Mar. 20, 2020.
Prior Publication US 2023/0026922 A1, Jan. 26, 2023
Int. Cl. H04N 19/157 (2014.01); H04N 19/103 (2014.01); H04N 19/105 (2014.01); H04N 19/136 (2014.01); H04N 19/169 (2014.01); H04N 19/172 (2014.01); H04N 19/174 (2014.01); H04N 19/176 (2014.01); H04N 19/46 (2014.01); H04N 19/70 (2014.01); H04N 19/88 (2014.01)
CPC H04N 19/70 (2014.11) [H04N 19/103 (2014.11); H04N 19/105 (2014.11); H04N 19/136 (2014.11); H04N 19/157 (2014.11); H04N 19/172 (2014.11); H04N 19/174 (2014.11); H04N 19/176 (2014.11); H04N 19/188 (2014.11); H04N 19/46 (2014.11); H04N 19/88 (2014.11)] 20 Claims
OG exemplary drawing
 
1. A method of processing video data, comprising:
performing a conversion between a video comprising a picture comprising two neighboring subpictures and a bitstream of the video,
wherein a first syntax element is related to one or more video coding layer (VCL) network abstraction layer (NAL) units in each picture referring to a picture parameter set,
wherein a second syntax element indicates whether a corresponding subpicture in a coded layer video sequence is treated as a picture,
wherein the bitstream conforms to a format rule that specifies that when the first syntax element for the picture is equal to 1, values of the second syntax elements for the two neighboring subpictures with different types of NAL units are equal to 1,
wherein the two neighboring subpictures comprise at least one of P slices, B slices, or I slices;
wherein the first syntax element equal to 1 indicates that each picture referring to a picture parameter set contains more than one VCL NAL unit and the more than one VCL NAL unit of each picture referring to the picture parameter set do not have a same NAL unit type, and
wherein the second syntax element equal to 1 indicates that a corresponding subpicture in a coded layer video sequence is treated as a picture; and
wherein the format rule further specifies that a trailing subpicture that is associated with an intra random access point subpicture or a gradual decoding refresh subpicture follows the intra random access point subpicture or the gradual decoding refresh subpicture in a decoding order.