Patent ID: 11930220
Assignee: BEIJING BYTEDANCE NETWORK TECHNOLOGY CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 17:
18. A non-transitory computer-readable storage medium storing instructions that cause a processor to:
perform a conversion between a video comprising multiple layers and a bitstream of the video according to a rule,
wherein the rule specifies that, in case that a first syntax element included in a sequence parameter set indicating number of subpictures in a video picture is greater than 1, and that a subpicture with a first subpicture index of i is treated as one video picture for the conversion, a cross-layer alignment restriction is applied to a current layer that includes the subpicture and a subset of layers associated with the current layer,
wherein the cross-layer alignment restriction includes a restriction of a current picture including the subpicture and a first picture in the subset of layers having a same value for at least one of following syntax elements:
a value of the first syntax element,
a value of a second syntax element specifying a dimension of a video picture,
a value of a third syntax element indicating a dimension of an i-th subpicture,
a value of a fourth syntax element indicating a location of the i-th subpicture, or
a value of the first subpicture index.