US 11,962,761 B2
Methods and devices for encoding and decoding a data stream representing at least one image that disables post-processing of reconstructed block based on prediction mode
Félix Henry, Chatillon (FR); Mohsen Abdoli, Chatillon (FR); Gordon Clare, Chatillon (FR); and Pierrick Philippe, Chatillon (FR)
Assigned to ORANGE, Issy-les-Moulineaux (FR)
Filed by ORANGE, Issy-les-Moulineaux (FR)
Filed on Oct. 26, 2022, as Appl. No. 17/973,966.
Application 17/973,966 is a division of application No. 17/277,945, granted, now 11,516,465, previously published as PCT/FR2019/052029, filed on Sep. 3, 2019.
Claims priority of application No. 1858573 (FR), filed on Sep. 21, 2018.
Prior Publication US 2023/0050410 A1, Feb. 16, 2023
Int. Cl. H04N 19/105 (2014.01); H04N 19/117 (2014.01); H04N 19/159 (2014.01); H04N 19/176 (2014.01); H04N 19/80 (2014.01); H04N 19/85 (2014.01)
CPC H04N 19/105 (2014.11) [H04N 19/117 (2014.11); H04N 19/159 (2014.11); H04N 19/176 (2014.11); H04N 19/80 (2014.11); H04N 19/85 (2014.11)] 18 Claims
OG exemplary drawing
 
1. A method for decoding a coded data stream representative of at least one image, said image being split into blocks, wherein the method comprises the following acts implemented by a decoding device for at least one block of the image, referred to as the current block:
decoding an item of information indicating a coding mode of the current block among at least a first coding mode and a second coding mode, the second coding mode being a coding mode according to which the current block is not decoded by using an inverse transform of a transformed prediction residue of the current block, but by, for each pixel of the current block:
obtaining a prediction of said pixel from another previously decoded pixel, said other previously decoded pixel belonging to said current block or to a previously decoded block of the image,
decoding a prediction residue associated with said pixel, and
reconstructing said pixel from the prediction of said pixel obtained and the decoded prediction residue associated with said pixel,
decoding the current block according to the coding mode indicated by the decoded item of information,
when the coding mode of the current block corresponds to a coding mode distinct from the second coding mode, applying at least one processing method to the reconstructed current block, and
when the coding mode of the current block corresponds to the second coding mode:
disabling applying said at least one processing method to the reconstructed current block for a pixel of the reconstructed current block if said pixel is located on a boundary of said reconstructed current block with a neighbouring block in the image and if said neighbouring block is decoded according to the second coding mode, and
applying said at least one processing method to a pixel of the reconstructed current block if said pixel is located on a boundary of said reconstructed current block with a reconstructed neighbouring block in the image and if said neighbouring block is decoded according to a coding mode distinct from the second coding mode.