US 12,088,971 B2
Method, an apparatus and a computer program product for video encoding and video decoding
Miska Hannuksela, Tampere (FI); Emre Aksu, Tampere (FI); and Kashyap Kammachi Sreedhar, Tampere (FI)
Assigned to Nokia Technologies Oy, Espoo (FI)
Appl. No. 17/786,766
Filed by Nokia Technologies Oy, Espoo (FI)
PCT Filed Dec. 17, 2020, PCT No. PCT/FI2020/050847
§ 371(c)(1), (2) Date Jun. 17, 2022,
PCT Pub. No. WO2021/136880, PCT Pub. Date Jul. 8, 2021.
Claims priority of application No. 20196140 (FI), filed on Dec. 31, 2019.
Prior Publication US 2023/0027058 A1, Jan. 26, 2023
Int. Cl. G06F 16/71 (2019.01); H04N 9/804 (2006.01); H04N 19/105 (2014.01); H04N 19/184 (2014.01); H04N 21/85 (2011.01); H04N 19/00 (2014.01)
CPC H04N 9/8042 (2013.01) [H04N 19/105 (2014.11); H04N 19/184 (2014.11)] 20 Claims
OG exemplary drawing
 
1. A method, comprising:
parsing, from a base track of a container file, a layout of subpictures;
parsing, from the container file, a sample group description entry indicating a first subpicture track or a group of subpicture tracks for at least one subpicture position in the layout of subpictures, wherein the first subpicture track comprises a subpicture sequence for the at least one subpicture position, and wherein a track among the group of subpicture tracks comprises a valid subpicture sequence for the at least one subpicture position;
selecting a second subpicture track from the group of subpicture tracks, in response to the sample group description entry indicating the group of subpicture tracks;
parsing, from the container file, a set of samples of the base track the sample group description entry is to be used for reconstructing a video bitstream; and
reconstructing, from the container file, coded pictures of the video bitstream corresponding to the set of samples, comprising including time-aligned samples of the first subpicture track or the second subpicture track for the at least one subpicture position of the layout of subpictures.