公开(公告)号：US20170353722A1

公开(公告)日：2017-12-07

申请号：US15538970

申请日：2015-12-14

Applicant: B<>COM ,  Orange

Inventor： Joel Jung

IPC: H04N19/119 ,  H04N19/139 ,  H04N19/147 ,  H04N19/176

CPC classification number: H04N19/119 ,  H04N19/139 ,  H04N19/147 ,  H04N19/176 ,  H04N19/70

Abstract: A method for encoding a digital image, which is divided into a plurality of blocks of pixels processed in a defined order. The method includes the following acts for a current block: a) obtaining a basic motion vector of the current block with respect to a reference image previously decoded; b) obtaining a partitioning into sub-blocks of the area pointed to in the reference image by the basic motion vector and applying the partitioning obtained to the current block; and c) scanning the sub-blocks of the current block according to a predetermined scanning order and encoding the sub-blocks scanned. The encoding includes modifying the partitioning of the current block into sub-blocks according to predetermined rules, coding the sub-blocks of the modified partitioning comprising coding reporting information on the modification of the partitioning, and validating the modified partitioning by applying a rate-distortion criterion to the coded sub-blocks of the modified partitioning.

公开(公告)号：US12022097B2

公开(公告)日：2024-06-25

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 ,  H04N19/105 ,  H04N19/119 ,  H04N19/132 ,  H04N19/139 ,  H04N19/147 ,  H04N19/176

CPC classification number: H04N19/33 ,  H04N19/105 ,  H04N19/119 ,  H04N19/132 ,  H04N19/139 ,  H04N19/147 ,  H04N19/176

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.

公开(公告)号：US20240201313A1

公开(公告)日：2024-06-20

申请号：US18554936

申请日：2022-04-14

Applicant: FONDATION B-COM

Inventor： Luc LE MAGOAROU

IPC: G01S5/02

CPC classification number: G01S5/0284 ,  G01S5/0269

Abstract: A method for relative positioning of electronic apparatuses in communication with a communication device establishing a set of communication channels through which the device exchanges electromagnetic signals with each electronic apparatus includes, for each electronic apparatus, estimating a vector for which the elements represent, respectively, transmission through the communication channels between the device and the respective electronic apparatus, for at least first and second electronic apparatuses, determining a minimum distance from the distances existing, for all possible phase-shift values, between a first vector having a predetermined norm which is colinear to the vector estimated for the first electronic apparatus, and a second vector having the predetermined norm which is colinear to the vector estimated for the second electronic apparatus and modified by applying a phase shift having a value among the possible values, and determining a position indicator for the first electronic apparatus based on the determined distance.

公开(公告)号：US11943458B2

公开(公告)日：2024-03-26

申请号：US17848665

申请日：2022-06-24

Applicant: FONDATION B-COM

Inventor： Charles Bonnineau ,  Wassim Hamidouche ,  Jean-Yves Aubie

IPC: H04N19/30 ,  H04N19/13 ,  H04N19/132 ,  H04N19/186 ,  H04N19/42

CPC classification number: H04N19/30 ,  H04N19/13 ,  H04N19/132 ,  H04N19/186 ,  H04N19/42

Abstract: The invention relates to a method for decoding an image based on a base layer (Cbase) and enhancement information (Iam), said method comprising the following steps:



decoding said base layer (Cbase) in order to obtain at least one base component (Ydecbase, Udecbase, Vdecbase),
oversampling the at least one base component (Ydecbase, Udecbase, Vdecbase) in order to obtain at least one oversampled component (Ysurech, Usurech, Vsurech),
decoding the enhancement information (Iam) by means of a part (B) at least of artificial neural network in order to obtain enhancement values (Vam),
reconstructing the image based on the at least one oversampled component (Ysurech, Usurech, Vsurech) and the enhancement values (Vam).




The invention also relates to associated encoding method, electronic decoding device, electronic encoding device and signal.

公开(公告)号：US20230379506A1

公开(公告)日：2023-11-23

申请号：US18248023

申请日：2021-10-01

Applicant: FONDATION B-COM

Inventor： Félix HENRY ,  Gordon CLARE

IPC: H04N19/91 ,  H04N19/436

CPC classification number: H04N19/91 ,  H04N19/436

Abstract: A method for decoding a bit sequence includes applying, at the input of an artificial neural network, previously decoded values; as a result of the previously decoded values being applied, producing a context index at the output of the artificial neural network; and obtaining a new decoded value by applying a portion of the bit sequence to an entropic decoder parameterized in the context identified by the produced context index. An electronic decoding device and an associated computer program are also provided.

公开(公告)号：US20230188385A1

公开(公告)日：2023-06-15

申请号：US17921481

申请日：2021-04-14

Applicant: FONDATION B-COM

Inventor： Luc LE MAGOAROU ,  Stéphane PAQUELET

IPC: H04L25/02 ,  G06N3/08

CPC classification number: H04L25/0254 ,  G06N3/08

Abstract: Disclosed is a device for estimating a channel for communication system, which includes: a construction module designed to construct, on the basis of a physical model, a set of vectors) associated with a plurality of values of at least one parameter; an initialization module designed to initialize, as a function of the constructed vectors), columns of weighting coefficients defining at least a part of an artificial neural network; an application module designed to apply, as an input to the part of the artificial neural network, a vector determined as a function of noisy values so as to produce as an output a vector including estimated values; and a module for updating the weighting coefficients of the part of the artificial neural network by a learning technique. An associated method and computer program are also described.

公开(公告)号：US20230004120A1

公开(公告)日：2023-01-05

申请号：US17784009

申请日：2020-12-03

Applicant: FONDATION B-COM

Inventor： Antonin GILLES ,  Patrick GIOIA

IPC: G03H1/08 ,  G06T9/00 ,  H04N19/176 ,  H04N19/167

Abstract: A method for encoding a digital hologram represented by values associated respectively with pixels in a plane defining the digital hologram includes forming matrix blocks associated respectively with regions composed of contiguous pixels, each matrix block containing elements determined as a function of the values of the pixels in the region associated with the respective matrix block, applying to each of the matrix blocks a space-frequency transformation to obtain, for each matrix block, a set of coefficients respectively corresponding to different two-dimensional spatial frequencies within the respective matrix block, constructing two-dimensional structures each including coefficients from sets of coefficients and associated with two-dimensional spatial frequencies meeting a criterion that is dependent on the two-respective dimensional structure, and encoding the constructed two-dimensional structures.

公开(公告)号：US11494928B2

公开(公告)日：2022-11-08

申请号：US17416104

申请日：2019-12-10

Applicant: FONDATION B-COM

Inventor： Nam-Duong Duong ,  Amine Kacete ,  Catherine Soladie

IPC: G06T7/55 ,  G06T7/80 ,  G06N20/20 ,  G06T19/00

Abstract: A method for predicting a three-dimensional representation in a three-dimensional scene, using one or more two-dimensional representations, obtained from at least one image generated by a camera. The method includes obtaining a forest of regression trees, and for the at least one image: extracting a 2D representation associated with one or more positions within the image; predicting a 3D representation, corresponding to the extracted 2D representation, using the regression tree forest includes a set of possible associations between at least one 2D representation and a 3D representation, each possible association resulting from a predictive model; evaluating one or more of the possible associations of the regression tree forest, according to a predetermined confidence criterion; and updating the regression tree forest including a deactivation of one or more possible associations, depending on the evaluation of the possible associations.

公开(公告)号：US20220292624A1

公开(公告)日：2022-09-15

申请号：US17639720

申请日：2020-09-02

Applicant: FONDATION B-COM

Inventor： Gaëtan LE GUELVOUIT ,  Valérie DENIS

IPC: G06T1/00

Abstract: A method for inserting information into a first image including N1 rows×M1 columns of elements includes: a) obtaining, from the first image, a second image including N0 rows×M0 columns, N0 ≤N1 and M0≤M1, b) generating initial information including N0 rows×M0 columns, c) obtaining intermediate information including N4 rows×M4 columns of elements, so N4≥N1 and M4≥M1, and N4=kx.N0 and M4=ky.M0, kx and ky being integers≥1, the elements organized into blocks, d) obtaining information to be inserted from the intermediate information, including: generating symbols representing noise, including as many symbols as block elements, at least one <>0, so the result of a function applied to the symbols=a chosen value, adding each symbol to the corresponding block element, and e) inserting the obtained information into the first image.

公开(公告)号：US11443454B2

公开(公告)日：2022-09-13

申请号：US16762853

申请日：2018-10-24

Applicant: FONDATION B-COM

Inventor： Nam-Duong Duong ,  Amine Kacete ,  Catherine Soladie

IPC: G06T7/73 ,  G06N3/08 ,  G06N5/00

Abstract: A method for estimating a camera pose in a frame of reference of a three-dimensional scene, including: obtaining an image of colour intensities of the scene; extracting points of interest, which are invariant by geometric transformation of the image; forming patches in the image, each including an extracted point of interest; predicting 3D locations of the points of interest by applying an automatic prediction system, trained by a training set including patches from images acquired from plural points of view, an image being associated with a 2D position of its point of interest in a frame of reference of the image and with a 3D position of its point of interest in the frame of reference of the scene; estimating the pose of a camera, by mapping the 2D positions of the points of interest and reprojections in the current image frame of reference of the predicted 3D locations.