EP 3922017 A1 20211215 - METHODS AND DEVICES FOR CODING AND DECODING A DATA STREAM REPRESENTING AT LEAST ONE IMAGE
Title (en)
METHODS AND DEVICES FOR CODING AND DECODING A DATA STREAM REPRESENTING AT LEAST ONE IMAGE
Title (de)
VERFAHREN UND VORRICHTUNGEN ZUR CODIERUNG UND DECODIERUNG EINES DATENSTROMS, DER MINDESTENS EIN BILD REPRÄSENTIERT
Title (fr)
PROCÉDÉS ET DISPOSITIFS DE CODAGE ET DE DÉCODAGE D'UN FLUX DE DONNÉES REPRÉSENTATIF D'AU MOINS UNE IMAGE
Publication
Application
Priority
- FR 1901228 A 20190207
- FR 2020050146 W 20200130
Abstract (en)
[origin: WO2020161413A1] The invention relates to a method for coding and decoding and, correspondingly, a device for coding and decoding a coded data stream representing at least one image that is split into blocks. For at least one current block of the image, a group of pixel values that are constant in the block is determined (E441) from pixels decoded beforehand, and for each pixel of the block, a prediction residual associated with said pixel is decoded (E442). A prediction value associated with the pixel is determined (E4411) using a first prediction mode in which the pixel is predicted from at least one other pixel decoded beforehand, said other pixel decoded beforehand belonging to said current block, a piece of information (E4422) indicating whether the pixel is to be predicted using a second prediction mode in which the pixel is predicted using a prediction resulting from said group of pixel values that are constant in the block. When the pixel is predicted using the second prediction mode, the prediction value associated with the pixel is replaced (E4423) by a selected value of the group. The pixel is reconstructed (E444) using the prediction value associated with the pixel and using the prediction residual.
IPC 8 full level
H04N 19/11 (2014.01); H04N 19/105 (2014.01); H04N 19/176 (2014.01); H04N 19/182 (2014.01); H04N 19/593 (2014.01); H04N 19/70 (2014.01)
CPC (source: EP KR US)
H04N 19/105 (2014.11 - EP KR); H04N 19/11 (2014.11 - EP KR US); H04N 19/119 (2014.11 - KR); H04N 19/176 (2014.11 - EP KR US); H04N 19/182 (2014.11 - EP KR US); H04N 19/593 (2014.11 - EP KR US); H04N 19/70 (2014.11 - EP KR)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2020161413 A1 20200813; BR 112021014787 A2 20210928; CN 113412618 A 20210917; CN 113412618 B 20240517; CN 118301343 A 20240705; EP 3922017 A1 20211215; FR 3092719 A1 20200814; JP 2022519739 A 20220324; KR 20210128401 A 20211026; US 12022115 B2 20240625; US 2022103862 A1 20220331
DOCDB simple family (application)
FR 2020050146 W 20200130; BR 112021014787 A 20200130; CN 202080013072 A 20200130; CN 202410522725 A 20200130; EP 20707501 A 20200130; FR 1901228 A 20190207; JP 2021546344 A 20200130; KR 20217025873 A 20200130; US 202017429174 A 20200130