公开(公告)号：EP3629579A1

公开(公告)日：2020-04-01

申请号：EP18306269.4

申请日：2018-09-27

Applicant: ATEME

Inventor： MORA, Elie ,  NASRALLAH, Anthony

IPC: H04N19/11 ,  H04N19/136 ,  H04N19/174 ,  H04N19/593

Abstract: A method of processing an image divided into a plurality of pixel blocks which are processed according to a processing sequence is provided, which comprises, for a current pixel block: determining an application area consisting of a set of pixels in blocks preceding the current block in the processing sequence, for each pixel of the application area, computing a gradient representing a directional change of an intensity at the pixel, and selecting, based on at least one of the computed gradients, an intra prediction video coding mode among a plurality of intra prediction video coding modes usable for encoding and/or decoding the current block.

公开(公告)号：EP3700210A1

公开(公告)日：2020-08-26

申请号：EP19305208.1

申请日：2019-02-21

Applicant: ATEME

Inventor： DOROVIC, Katarina ,  MORA, Elie ,  MONNIER, Mathieu

IPC: H04N19/139 ,  H04N19/176 ,  H04N19/117 ,  H04N19/523 ,  H04N19/59

Abstract: A method of encoding a first image in a plurality of images of input video data, wherein the first image is divided into a plurality of pixel blocks is provided, which comprises, for a current block of the first image: determining a motion speed for the current block with respect to a reference block correlated to the current block in a second image of the plurality of images, wherein the second image is distinct from the first image and was previously encoded according to an image encoding sequence for encoding the images of the plurality of images; determining an interpolation filter based on the motion speed; and using the interpolation filter for calculating fractional pixel values in the second image for a temporal prediction of pixels of the current block based on the reference block of the second image.

公开(公告)号：EP3709644A1

公开(公告)日：2020-09-16

申请号：EP19305293.3

申请日：2019-03-12

Applicant: ATEME

Inventor： MORA, Elie ,  MOHSEN, Abdoli ,  GUIONNET, Thomas

IPC: H04N19/11 ,  H04N19/176 ,  H04N19/593 ,  H04N19/136 ,  H04N19/196

Abstract: A method of processing an image divided into a plurality of pixel blocks which are processed according to a processing sequence is provided, which comprises, for a current pixel block: determining an application area comprising a set of pixels in blocks preceding the current block in the processing sequence; performing a gradient analysis on at least one pixel of the application area; selecting at least two intra prediction video coding modes among a plurality of intra prediction video coding modes usable for processing the current pixel block, wherein at least one of the selected intra prediction video coding modes is selected based on the gradient analysis; determining a plurality of predictors of the current pixel block based on the at least two selected intra prediction video coding modes; and generating a predictor of the current pixel block based on the determined plurality of predictors.

公开(公告)号：EP3594895A1

公开(公告)日：2020-01-15

申请号：EP19185438.9

申请日：2019-07-10

Applicant: ATEME

Inventor： MORA, Elie

IPC: G06T5/00 ,  G06T5/50

Abstract: L'invention concerne un procédé de traitement de bruit d'un flux comprenant une série d'images comportant :
- filtrage spatial d'une image courante I n pour obtenir une image filtrée spatialement S n ;
- détermination d'un vecteur de mouvement pour chaque bloc B de pixels de l'image S n à partir d'une seule image S n-1 ;
- calcul d'un indice de confiance α n [B] pour chaque bloc B de l'image I n à partir du vecteur de mouvement déterminé pour B;
- construction d'un filtre temporel à partir des indices de confiance α n [B] calculés et application du filtre temporel à l'image courante I n pour obtenir une image filtrée temporellement T n ;
- filtrage spatiale de l'image courante I n pour obtenir une image filtrée spatialement D n , D n pouvant être égale à S n et
- obtention d'une image R n filtrée temporellement et spatialement par application d'une fonction combinant l'image T n et l'image D n .