US 11,871,092 B2
Method and apparatus for encapsulating derived tracks
Frédéric Maze, Langan (FR); and Franck Denoual, Saint Domineuc (FR)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Appl. No. 17/438,655
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
PCT Filed Mar. 4, 2020, PCT No. PCT/EP2020/055632
§ 371(c)(1), (2) Date Sep. 13, 2021,
PCT Pub. No. WO2020/187564, PCT Pub. Date Sep. 24, 2020.
Claims priority of application No. 1903683 (GB), filed on Mar. 18, 2019.
Prior Publication US 2022/0159352 A1, May 19, 2022
Int. Cl. H04N 21/854 (2011.01); H04N 21/2343 (2011.01); H04N 21/845 (2011.01)
CPC H04N 21/85406 (2013.01) [H04N 21/234345 (2013.01); H04N 21/8455 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method of generating a data file, wherein the method comprises:
obtaining a derived track comprising at least one derived sample, each derived sample comprising a sequence of derivation operations to be performed on a list of at least one input;
wherein the derived track comprises an entry value having its most significant bit set to 1 for indicating that an input of a derivation operation is the output of one among the previous derivation operations in the sequence, the remaining bits of the entry value corresponding to the index of the derivation operation used as input among the previous derivation operations; and
generating the file comprising the derived track and a reference to the at least one input.