US 11,736,725 B2
Methods for encoding decoding of a data flow representing of an omnidirectional video
Thibaud Biatek, Souligny (FR)
Assigned to TDF, Montrouge (FR)
Filed by TDF, Montrouge (FR)
Filed on Oct. 13, 2021, as Appl. No. 17/500,362.
Application 17/500,362 is a continuation of application No. 16/756,755, granted, now 11,172,223, previously published as PCT/EP2018/077922, filed on Oct. 12, 2018.
Claims priority of application No. 1759822 (FR), filed on Oct. 19, 2017.
Prior Publication US 2022/0046279 A1, Feb. 10, 2022
Int. Cl. H04N 19/597 (2014.01); H04N 19/174 (2014.01); H04N 19/34 (2014.01); H04N 19/103 (2014.01); H04N 19/105 (2014.01); H04N 19/172 (2014.01); H04N 19/187 (2014.01); H04N 19/30 (2014.01); H04N 19/46 (2014.01); H04N 19/61 (2014.01); H04N 19/70 (2014.01); H04N 19/176 (2014.01)
CPC H04N 19/597 (2014.11) [H04N 19/174 (2014.11); H04N 19/176 (2014.11); H04N 19/34 (2014.11)] 14 Claims
OG exemplary drawing
 
1. A method for encoding a data stream representative of an omnidirectional video, wherein the method comprises the following acts performed by an encoding device:
encoding, in said stream, at least one base layer representative of a 2D or 3D video, the 2D or 3D video being representative of a view of a same scene captured by the omnidirectional video; and
encoding, in said stream, one enhancement layer representative of the omnidirectional video, the enhancement layer being encoded by prediction relative to the at least one base layer,
wherein the prediction of the enhancement layer relative to the at least one base layer comprises, in order to encode one image of the enhancement layer, called enhancement image, for each of said at least one base layer:
generating a reference sub-image obtained by geometrical projection on said reference sub-image of an image, called a base image, rebuilt from said base layer, said reference sub-image serving as a prediction for said at least one enhancement image,
storing said reference sub-image in association with shift information enabling an encoder to determine the location of the reference sub-image in the enhancement image in a non-transitory computer-readable memory of reference sub-images of the enhancement layer.