US 12,143,601 B2
Specifying layout in video pictures
Chih-Wei Hsu, Hsinchu (TW); Lulin Chen, San Jose, CA (US); Yu-Ling Hsiao, Hsinchu (TW); Chun-Chia Chen, Hsinchu (TW); Ching-Yeh Chen, Hsinchu (TW); and Chen-Yen Lai, Hsinchu (TW)
Assigned to HFI INNOVATION INC., Zhubei (TW)
Filed by MediaTek Inc., Hsinchu (TW)
Filed on Dec. 2, 2020, as Appl. No. 17/110,208.
Claims priority of provisional application 62/960,095, filed on Jan. 12, 2020.
Claims priority of provisional application 62/958,607, filed on Jan. 8, 2020.
Claims priority of provisional application 62/956,676, filed on Jan. 3, 2020.
Claims priority of provisional application 62/955,381, filed on Dec. 30, 2019.
Claims priority of provisional application 62/943,835, filed on Dec. 5, 2019.
Prior Publication US 2021/0176475 A1, Jun. 10, 2021
Int. Cl. H04N 19/167 (2014.01); H04N 19/169 (2014.01); H04N 19/176 (2014.01); H04N 19/46 (2014.01); H04N 19/70 (2014.01)
CPC H04N 19/167 (2014.11) [H04N 19/176 (2014.11); H04N 19/1883 (2014.11); H04N 19/46 (2014.11); H04N 19/70 (2014.11)] 11 Claims
OG exemplary drawing
 
1. A video decoding method, comprising:
receiving data from a bitstream to be decoded as a current picture of a video, wherein a picture order count of the current picture is received from a picture header of the current picture, the picture header being a raw byte sequence payload (RBSP) syntax element indicating a start of the current picture in the bitstream;
determining positions and sizes of subpictures in a set of subpictures of the current picture, including:
determining a width and a height of a first subpicture of the set of subpictures as specified in a sequence parameter set that is provided in the bitstream and applicable to the current picture;
setting a position of the first subpicture of the set of subpictures as [0, 0] that is relative to the current picture, the position of the first subpicture corresponding to a top-left position of the first subpicture, a parameter specifying the position of the first subpicture being omitted in the sequence parameter set; and
deriving a width and a height of a last subpicture of the set of subpictures based on a width and a height of the current picture and sizes of one or more subpictures in the set of subpictures other than the last subpicture, the width and the height of the last subpicture of the set of subpictures being omitted in the sequence parameter set; and
reconstructing the current picture based on the subpictures in the set of subpictures of the current picture and the determined positions of the subpictures, wherein
the width of the last subpicture is determined by subtracting one or more widths of one or more last row subpictures in the set of subpictures except the last subpicture from the width of the current picture, and
the height of the last subpicture is determined by subtracting one or more heights of one or more last column subpictures in the set of subpictures except the last subpicture from the height of the current picture, wherein:
the picture order count is signaled in the picture header when the picture header is repeated in the bitstream.