公开(公告)号：US20210195139A1

公开(公告)日：2021-06-24

申请号：US17127115

申请日：2020-12-18

Applicant: FONDATION B-COM

Inventor： Foteini Tania POULI ,  Cambodge BIST ,  Jean-Yves AUBIE

IPC: H04N7/01 ,  H04N9/77 ,  G06T5/00

Abstract: A method is described for converting an input image into an output image, the output image including an output luminance component made of elements. The method includes: obtaining an input luminance component from the input image; determining the output luminance component, the respective ranges of the output luminance component element values and input luminance component element values being of different range extension, the determining step including: —determining a first intermediate luminance component from the input luminance component and an exponent, —obtaining a mapping profile allowing for mapping a luminance component based on the input luminance component into the output luminance component, —determining a second intermediate luminance component from the input luminance component and the obtained mapping profile, —determining the output luminance component from the first and second intermediate luminance components; and converting the input image into the output image.

公开(公告)号：US12218711B2

公开(公告)日：2025-02-04

申请号：US18026984

申请日：2021-09-21

Applicant: FONDATION B-COM

Inventor： Matthieu Roy ,  Stéphane Paquelet

IPC: H04B1/20 ,  H04B17/309 ,  H04L25/02

Abstract: A method for detecting (DET) a signal in a communication system including a plurality of communication channels, from a plurality of noisy values respectively representative of the transmission through the communication channels, is provided. The propagation in the communication channels is characterized by at least one variable. The set of values that can be taken by the variable is divided into a plurality of ranges. The method includes receiving (E4) the signals respectively transmitted in the plurality of communication channels, and detecting (E20) a signal corresponding to a value of the variable lying within one of the plurality of ranges by comparing, with a predetermined threshold, a value taken by a correlator linked to the range in question and calculated as a function of the noisy values. A channel estimation method, a detection device, a channel estimation device and a computer program are also described.

公开(公告)号：US12132933B2

公开(公告)日：2024-10-29

申请号：US17624748

申请日：2020-06-24

Applicant: FONDATION B-COM

Inventor： Patrick Gioia ,  Antonin Gilles

IPC: H04N19/597 ,  G03H1/08 ,  H04N19/119 ,  H04N19/137 ,  H04N19/18 ,  H04N19/63

CPC classification number: H04N19/597 ,  G03H1/0841 ,  H04N19/119 ,  H04N19/137 ,  H04N19/18 ,  H04N19/63 ,  G03H2226/02

Abstract: Disclosed is a method and a device for coding a sequence including first and second digital holograms representing respective scenes, the digital holograms being represented by a set of wavelets each defined by a multiplet of coordinates in multidimensional space. The first and second holograms are represented by first and second coefficients respectively associated with wavelets. The coding method includes the following steps: for each second coefficient, determining a remainder by a difference between the second coefficient concerned, associated with a first wavelet defined by a given multiplet, and the first coefficient) associated with a second wavelet defined by a multiplet having as its image the multiplet by a transform in the multidimenisonal space; coding the determined remainders. The transform is determined by analysis of variation between the first scene represented by the first digital hologram and the second scene represented by the second digital hologram.

公开(公告)号：US20240153118A1

公开(公告)日：2024-05-09

申请号：US18499924

申请日：2023-11-01

Applicant: FONDATION B-COM

Inventor： Nabil MADALI ,  Antonin GILLES ,  Patrick GIOIA ,  Luce MORIN

IPC: G06T7/55 ,  G06T17/00

CPC classification number: G06T7/55 ,  G06T17/00 ,  G06T2207/20081 ,  G06T2207/20084

Abstract: A method for estimating a depth map associated with a hologram representing a scene, the method includes steps of: reconstruction of images of the scene, each image being associated with a depth; decomposition of each image into a plurality of thumbnails adjacent to each other, each thumbnail being associated with the depth and including a plurality of pixels; determination, for each thumbnail, of a focus map by supplying, at the input of a network of neurons, values associated with the pixels of the thumbnail, to obtain, at the output of the network, the focus map including a focus level associated with the pixel concerned; and determination of a depth value, for each point of a depth map, as a function of the focus levels obtained. The invention also relates to an estimation device and an associated computer program.

公开(公告)号：US20240056603A1

公开(公告)日：2024-02-15

申请号：US18259064

申请日：2021-12-17

Applicant: FONDATION B-COM

Inventor： Benoît LE LUDEC ,  Patrick DUMÉNIL ,  Franck CHI

IPC: H04N19/59 ,  H04N19/117 ,  G06T7/11 ,  H04N19/154 ,  H04N19/172

CPC classification number: H04N19/59 ,  H04N19/117 ,  G06T7/11 ,  H04N19/154 ,  H04N19/172

Abstract: Disclosed is a method for encoding images of a video sequence that includes implementing the following steps: c) obtaining an initial configuration representative of structural characteristics of a display device and, for an image of the video sequence referred to as the input sub-sequence, d1) carrying out a first spatial sub-sampling operation on the elements of the image by using a filter oriented in a first direction and including a first set of values of sub-sampling factors, the latter being determined as a function of the initial configuration, then inserting the resulting image into an output sub-sequence, and e) encoding the images of the output sub-sequence.

公开(公告)号：US20230283836A1

公开(公告)日：2023-09-07

申请号：US18016598

申请日：2021-07-13

Applicant: FONDATION B-COM

Inventor： Félix HENRY ,  Gordon CLARE

IPC: H04N21/435 ,  H04N21/442

CPC classification number: H04N21/435 ,  H04N21/44209

Abstract: A data stream includes an indicator (IND) and data (Fnn) representative of a video or audio content. A method for decoding this data stream includes: decoding (E60) the indicator (IND) to determine whether an artificial neural network to be used to decode the representative data (Fnn) is encoded into the data stream or forms part of a predetermined set of artificial neural networks, and decoding (D70) the representative data (Fnn) by the artificial neural network. If it is determined, by decoding the indicator (Fnn) that the artificial neural network forms part of the aforementioned predetermined set, the method includes decoding (E62) an identifier (Inn) of the neural network. Associated decoding devices and associated data streams are also described.

公开(公告)号：US11736882B2

公开(公告)日：2023-08-22

申请号：US17413229

申请日：2019-12-13

Applicant: FONDATION B-COM

Inventor： Alexandre Guérin

IPC: H04S7/00

CPC classification number: H04S7/301 ,  H04S7/304 ,  H04S2400/15 ,  H04S2420/11

Abstract: A method for interpolating a sound field captured by a plurality of N microphones each outputting the encoded sound field in a form including at least one captured pressure and an associated pressure gradient vector. Such a method includes an interpolation of the sound field at an interpolation position outputting an interpolated encoded sound field as a linear combination of the N encoded sound fields each weighted by a corresponding weighting factor. The interpolation includes an estimation of the N weighting factors at least from: the interpolation position; a position of each of the N microphones; the N pressures captured by the N microphones; and an estimated power of the sound field at the interpolation position.

公开(公告)号：US11641463B2

公开(公告)日：2023-05-02

申请号：US17291813

申请日：2019-11-06

Applicant: FONDATION B-COM

Inventor： Félix Henry ,  Gordon Clare ,  Pierrick Philippe

IPC: H04N19/105 ,  H04N19/119 ,  H04N19/159 ,  H04N19/167 ,  H04N19/176 ,  H04N19/593 ,  G06T9/00 ,  H03M7/36 ,  H03M7/30

Abstract: A method for encoding or decoding at least one image, an image being split into blocks of elements. The method includes, for at least one block: splitting the block into at least two areas; and processing at least one of the areas. The processing includes scanning the elements of the area according to a predetermined scanning order, and for at least one scanned element, called a current element: selecting at least one predictor element previously encoded or decoded according to a prediction function; and predicting the current element: from the at least one predictor element, if the at least one predictor element belongs to the area; or from at least one replacement value, otherwise.

公开(公告)号：US11601617B2

公开(公告)日：2023-03-07

申请号：US16961735

申请日：2019-07-26

Applicant: FONDATION B-COM

Inventor： Jean-Yves Aubie ,  Wassim Hamidouche ,  Patrick Dumenil ,  Glenn Herrou

IPC: H04N7/01

Abstract: A method for forming an image sequence that is an output sequence, from an input image sequence, is provided. The input image sequence has an input spatial resolution and an input temporal resolution. The output sequence has an output temporal resolution equal to the input temporal resolution and an output spatial resolution equal to a predetermined fraction 1/N of the input spatial resolution by an integer number N higher than or equal to 2. The method, implemented for a sub-sequence of the input frame sequence that is a current input sub-sequence and including a preset number of images, includes: obtaining a temporal frequency that is an image frequency, associated with the current input sub-sequence; processing the current input sub-sequence to obtain an output sub-sequence; and inserting the output sub-sequence and the associated image frequency into an output container.

公开(公告)号：US20220141475A1

公开(公告)日：2022-05-05

申请号：US17427526

申请日：2020-01-24

Applicant: FONDATION B-COM

Inventor： Glenn HERROU ,  Wassim HAMIDOUCHE ,  Luce MORIN ,  Jean-Yves AUBIE

IPC: H04N19/33 ,  H04N19/176 ,  H04N19/119 ,  H04N19/147 ,  H04N19/105 ,  H04N19/139 ,  H04N19/132

Abstract: Disclosed is a method for encoding data corresponding to a video sequence, into a spatial resolution scalable binary flow, including a base layer and enhancement layer. The method includes, for a frame of the sequence: obtaining, from the frame, a first frame, partitioning the first frame into blocks, each block having a given size, and encoding a block of the first frame to generate the base layer; obtaining, from the frame, a second frame; partitioning the second frame into blocks by inferring the initial size of a block from the size of a corresponding block in the first frame, the block of the second frame having an initial spatial resolution; determining a spatial encoding resolution associated with the block from a set of predetermined spatial resolutions; and coding data representative of the at block, based on the determined spatial encoding resolution, to generate an enhancement layer.