公开(公告)号：US12099329B2

公开(公告)日：2024-09-24

申请号：US17050214

申请日：2019-03-20

Applicant: FONDATION B-COM

Inventor： Patrick Gioia ,  Antonin Gilles

IPC: G03H1/22 ,  G03H1/08 ,  G06F3/01

CPC classification number: G03H1/2294 ,  G03H1/0808 ,  G06F3/011

Abstract: Disclosed is a method for processing an input hologram HE associated with an input plane, to obtain an output hologram displayable on a holographic screen placed in a plane called the output plane of a display system, viewable from a viewing plane of the system. The method includes: receiving the input hologram and a position of the input plane; obtaining a first transfer matrix representative of a propagation between the input plane and the viewing plane; obtaining a second transfer matrix representative of a propagation between the viewing plane and the output plane; calculating an overall matrix of transfer of a light field emitted by the input hologram, between the input plane and the output plane, by taking the product of the two matrices; and converting the input hologram into the output hologram by applying an operator dependent of the input hologram and on the screen.

公开(公告)号：US20240282001A1

公开(公告)日：2024-08-22

申请号：US18573226

申请日：2022-06-23

Applicant: FONDATION B-COM

Inventor： Mathieu GONZALEZ ,  Eric MARCHAND ,  Amine KACETE ,  Jérôme ROYAN

IPC: G06T7/73 ,  G06T7/579 ,  G06V10/764 ,  G06V10/82

CPC classification number: G06T7/73 ,  G06T7/579 ,  G06V10/764 ,  G06V10/82 ,  G06T2200/04 ,  G06T2207/20084

Abstract: A device, a mapping system, and a method for determining a map of a three-dimensional environment including objects determine common characteristic elements in first and second images of the environment, determine groups of characteristic elements by an image analysis such that each group of characteristic elements corresponds to an object of the environment, estimate a three-dimensional position of the characteristic elements based on a triangulation between positions of the characteristic elements in the first image and positions of the corresponding characteristic elements in the second image, and, for each group of characteristic elements, optimize the three-dimensional positions of the characteristic elements of the respective group by minimizing an error variable which is a function, for all the characteristic elements of the group, of a distance between a detected position of the characteristic elements from at least the first image and a two-dimensional position associated with the corresponding estimated three-dimensional position.

公开(公告)号：US20240042694A1

公开(公告)日：2024-02-08

申请号：US18258792

申请日：2021-12-17

Applicant: FONDATION B-COM

Inventor： Albert MURIENNE ,  Laurent LAUNAY

IPC: B29C64/386

CPC classification number: B29C64/386 ,  B33Y50/00

Abstract: A method for constructing a 3D label from a precursor element and the 3D label are provided, the precursor element including at least one surface, the method including: determining at least one 2D representation associated with the at least one surface of the precursor element, the 2D representation comprising a plurality of values associated with parts of the surface of the precursor element, respectively, and constructing a corresponding section of the 3D label from the surface by attaching a structural feature of an element of the respective section, defining said element from the surface according to a value of the 2D representation associated with the respective part of the surface.

公开(公告)号：US20230370087A1

公开(公告)日：2023-11-16

申请号：US18029545

申请日：2021-09-28

Applicant: FONDATION B-COM

Inventor： Félix HENRY ,  Gordon CLARE

IPC: H03M7/30

CPC classification number: H03M7/6005 ,  H03M7/3079 ,  H03M7/3066

Abstract: A method for decoding a data stream, including a plurality of identifiers and a bit sequence, into a sequence of data of respective predetermined types includes the following operations for obtaining each item of data of the sequence: determining a context on the basis of an identifier, from among the plurality of identifiers, with the type of the relevant item of data; and decoding one portion of the bit sequence by an entropic decoder which receives the bit sequence as an input and is parameterized in the determined context. An electronic decoding device and an associated computer program are also provided.

公开(公告)号：US20230344531A1

公开(公告)日：2023-10-26

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

CPC classification number: H04B17/309 ,  H04B1/20 ,  H04L25/0212

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：US20230283790A1

公开(公告)日：2023-09-07

申请号：US18016568

申请日：2021-07-13

Applicant: FONDATION B-COM

Inventor： Félix HENRY ,  Gordon CLARE

IPC: H04N19/436 ,  H04N19/90

CPC classification number: H04N19/436 ,  H04N19/90

Abstract: In a method for decoding a data stream by way of an electronic device (10) including a processor (14), and a parallelized processing unit (16) designed to perform a plurality of operations of the same type in parallel at a given time, the data stream includes a first dataset (Fet) and a second dataset (Fnn) representative of audio or video content. The decoding method includes the processor (14) processing data from the first dataset (Fet), obtaining the audio or video content by processing (E70) data from the second dataset (Fnn) using a process depending at least partially on the data from the first set (Fet) and using an artificial neural network (18) implemented by the parallelized processing unit (16).

公开(公告)号：US11736694B2

公开(公告)日：2023-08-22

申请号：US17494299

申请日：2021-10-05

Applicant: FONDATION B-COM

Inventor： Victorien Lorcy ,  Pierrick Philippe

IPC: H04N19/12 ,  H04N19/119 ,  H04N19/176 ,  H04N19/60

CPC classification number: H04N19/12 ,  H04N19/119 ,  H04N19/176 ,  H04N19/60

Abstract: A method for decoding a digital image from encoded data representative of the image. The image is divided into blocks processed in a defined order. The method includes, for a current block having a predetermined number (Mv) of lines and number (Mh) of columns: decoding coefficients of the current block from coded data; decoding an index representative of an identifier of a transform among a plurality of transforms and identifying the transform, a transform being expressed as a vertical subtransform of size Mv*Mv and a horizontal subtransform of size Mh*Mh; transforming the current block into a decoded block transformed, from the transform obtained, by successive application of the vertical subtransform and then the horizontal subtransform or respectively of the horizontal subtransform and then the vertical subtransform; and reconstructing the image from the transformed decoded block. The transforming includes: a modified use of core sub-transform coefficients, their absolute values being retained.

公开(公告)号：US20230050498A1

公开(公告)日：2023-02-16

申请号：US17786091

申请日：2020-12-18

Applicant: FONDATION B-COM

Inventor： Foteini Tania POULI ,  Olivier WEPPE ,  Benoît LE LUDEC

IPC: G06T5/00

Abstract: The invention concerns a method for converting an input image comprising an input luminance component made of elements into an output image comprising an output luminance component made of elements, the respective ranges of the output luminance component values and input luminance component element values being of different range extension. the method comprises for the input image: computing a value of a general variable representative of at least two input luminance component element values; transforming each input luminance component element value into a corresponding output luminance component element value according to the computed general variable value; and converting the input image using the determined output luminance component element values. The transforming step uses a set of pre-determined output values organized into a 2D Look-Up-Table (2D LUT) comprising two input arrays indexing a set of chosen input luminance component values and a set of chosen general variable values respectively, each pre-determined output value matching a pair of values made of an indexed input luminance component value and an indexed general variable value, the input luminance component element value being transformed into the output luminance component element value using at least one predetermined output value.

公开(公告)号：US20230031343A1

公开(公告)日：2023-02-02

申请号：US17789440

申请日：2020-12-18

Applicant: FONDATION B-COM

Inventor： Nicolas EPAIN

IPC: G01S5/20

Abstract: A method and associated system for estimating a quantity representative of the sound energy at at least one point of a three-dimensional space where a plurality of antennas are situated, each including at least K acoustic sensors, K being higher than or equal to 2, includes for each antenna of the plurality of antennas, production of a plurality of signals representative of the sound field at the antenna in question, for each antenna of the plurality of antennas, determination of a raw value of the quantity at the point based on at least K+1 elements of a matrix that are based respectively on pairwise combinations of representative signals produced by the antenna in question, and determination of an estimated value of the quantity at the point by combining the raw values of the quantity at the point determined respectively for the various antennas of the plurality of antennas.

公开(公告)号：US20220368889A1

公开(公告)日：2022-11-17

申请号：US17622094

申请日：2020-06-24

Applicant: FONDATION B-COM

Inventor： Félix HENRY ,  Gordon CLARE

IPC: H04N19/105 ,  H04N19/186 ,  H04N19/176 ,  H04N19/46

Abstract: Proposed is a method for encoding an image of a video sequence, the image including at least two components, including a component representative of the luminance and a component representative of the chrominance, each component being partitioned into blocks, wherein the method involves encoding at least one block of the chrominance component using a BDPCM mode.