Patent ID: 11863794
Assignee: BYTEDANCE INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 4:
5. The method of claim 4,
wherein the format rule further specifies that a width of a subpicture in units of tile columns is derived based on tile column indices of a left-most CTB and/or a right-most CTB included in the subpicture, and
wherein a width of an i-th subpicture in units of tiles columns, denoted as SubpicWidthInTiles[i], is derived as follows:
for(i=0; i<=sps_num_subpics_minus1; i++) {
leftX=sps_subpic_ctu_top_left_x[i]
rightX=leftX+sps_subpic_width_minus1[i]
SubpicWidthInTiles[i]=ctbToTileColIdx[rightX]+1−ctbToTileColIdx[leftX]

},
wherein sps_subpic_ctu_top_left_x[i] represents a horizontal position of a top-left CTB of the i-th subpicture,
wherein sps_subpic_width_minus1[i] plus 1 specifies the width of the i-th subpicture, and
wherein ctbToTileColIdx[rightX] and ctbToTileColIdx[leftX] represent the tile column indices of the left-most CTB and the right-most CTB, respectively, included in the subpicture.