Patent ID: 11962771
Assignee: BEIJING BYTEDANCE NETWORK TECHNOLOGY CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 16:
17. A non-transitory computer-readable recording medium storing a bitstream of a video which is generated by a method performed by a video processing apparatus, wherein the method comprises:
determining, for a video comprising a picture which is divided into one or more subpictures, a position of a subpicture of the one or more subpictures based on a first syntax element and a second syntax element included in the bitstream; and
generating the bitstream based on the determining,
wherein the first syntax element indicates a horizontal position of a top-left coding tree unit of the subpicture in unit of CtbSizeY and a length of the first syntax element is derived to be Ceil(Log 2(S1)) bits,
wherein the second syntax element indicates a vertical position of the top-left coding tree unit of the subpicture in unit of CtbSizeY and a length of the second syntax element is derived to be Ceil(Log 2(S2)) bits,
wherein S1 and S2 are greater than 0, and CtbSizeY denotes a size of a coding tree block, and
wherein S1 is equal to (S3+CtbSizeY−1)/CtbSizeY, and S2 is equal to (S4+CtbSizeY−1)/CtbSizeY, wherein S3 is a value of a syntax element included in a sequence parameter set and specifying a maximum width of a decoded picture referring to the sequence parameter set in units of luma samples, and wherein S4 is the value of a syntax element included in the sequence parameter set and specifying a maximum height of a decoded picture referring to the sequence parameter set in units of luma samples.