US 12,445,621 B2
Media file generation/reception method and apparatus supporting random access in units of samples, and method for transmitting media file
Hendry Hendry, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 18/267,041
Filed by LG ELECTRONICS INC, Seoul (KR)
PCT Filed Dec. 14, 2021, PCT No. PCT/KR2021/018981
§ 371(c)(1), (2) Date Jun. 13, 2023,
PCT Pub. No. WO2022/131754, PCT Pub. Date Jun. 23, 2022.
Claims priority of provisional application 63/124,884, filed on Dec. 14, 2020.
Prior Publication US 2024/0056578 A1, Feb. 15, 2024
Int. Cl. H04N 19/136 (2014.01); H04N 19/132 (2014.01); H04N 19/169 (2014.01); H04N 19/172 (2014.01); H04N 19/30 (2014.01); H04N 19/46 (2014.01)
CPC H04N 19/132 (2014.11) [H04N 19/136 (2014.11); H04N 19/172 (2014.11); H04N 19/188 (2014.11); H04N 19/30 (2014.11); H04N 19/46 (2014.11)] 13 Claims
OG exemplary drawing
 
1. A media file receiving method performed by a media file receiving apparatus for receiving a media file of a predetermined format, the media file including video data, the media file receiving method comprising:
obtaining one or more track and sample group from the media file; and
processing the video data in the media file by reconstructing a sample included in the track based on the sample group,
wherein, based on that samples mapped to a stream access point sample group of a predetermined type or a random access recovery point sample group are present in the track,
a current sample among the mapped samples is constrained to include at least one intra random access point (IRAP) subpicture, and
based on that the current sample includes a non-IRAP subpicture, a sample belonging to a same coded layer video sequence (CLVS) as the current sample and following the current sample in decoding order is constrained to include at least one IRAP subpicture with a same subpicture index value as the non-IRAP subpicture.