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    METHOD FOR DECODING A DATA STREAM, ASSOCIATED DEVICE AND ASSOCIATED DATA STREAM
    22.
    发明公开
    METHOD FOR DECODING A DATA STREAM, ASSOCIATED DEVICE AND ASSOCIATED DATA STREAM 审中-公开

    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.

    Method for interpolating a sound field, corresponding computer program product and device
    23.
    发明授权
    Method for interpolating a sound field, corresponding computer program product and device 有权

    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.

    METHOD AND DEVICE FOR CODING AND DECODING DATA CORRESPONDING TO A VIDEO SEQUENCE
    26.
    发明申请
    METHOD AND DEVICE FOR CODING AND DECODING DATA CORRESPONDING TO A VIDEO SEQUENCE 有权

    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.

    Method and device for determining the amplitude of a movement performed by a member of an articulated body
    27.
    发明授权
    Method and device for determining the amplitude of a movement performed by a member of an articulated body 有权

    公开(公告)号：US11276184B2

    公开(公告)日：2022-03-15

    申请号：US16913437

    申请日：2020-06-26

    Applicant: FONDATION B-COM

    Inventor： Albert Murienne ,  Laurent Launay

    IPC: G06T7/246 ,  G06T7/50 ,  G06T7/73 ,  G06T17/00 ,  G06T19/20 ,  G06N20/00

    Abstract: A method for determining the amplitude of a movement performed by a member of an articulated body comprises: obtaining a segment representative of the positioning of the member in a given reference frame at the end of said movement, generating a three-dimensional model of the member, positioned in said reference frame by means of the obtained segment, obtaining a cloud of three-dimensional points representing the member in said reference frame at the end of said movement, based on depth information provided by a sensor, said depth information defining a three-dimensional scene comprising at least a part of the articulated body including said member, repositioning the model of the member so as to minimize a predetermined error criterion between the obtained cloud of points and said model, and determining the amplitude of the movement, based on the new positioning of the model of the member.

    A Method for predicting a three-dimensional (3D) representation, apparatus, system and computer program therefor
    28.
    发明申请
    A Method for predicting a three-dimensional (3D) representation, apparatus, system and computer program therefor 有权

    公开(公告)号：US20220076438A1

    公开(公告)日：2022-03-10

    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 ,  G06N20/20 ,  G06T7/80 ,  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.

    METHOD FOR CONVERTING A FIRST SET OF SIGNALS REPRESENTATIVE OF A SOUND FIELD INTO A SECOND SET OF SIGNALS AND ASSOCIATED ELECTRONIC DEVICE
    29.
    发明申请
    METHOD FOR CONVERTING A FIRST SET OF SIGNALS REPRESENTATIVE OF A SOUND FIELD INTO A SECOND SET OF SIGNALS AND ASSOCIATED ELECTRONIC DEVICE 有权

    公开(公告)号：US20210407524A1

    公开(公告)日：2021-12-30

    申请号：US17362704

    申请日：2021-06-29

    Applicant: FONDATION B-COM

    Inventor： Nicolas EPAIN ,  Francois SALMON

    IPC: G10L19/008 ,  H04S7/00 ,  H04S3/02

    Abstract: A conversion method comprises the following steps: for each of the signals (bE(t)) of a first set, determining values (α(f)) respectively associated with frequency bands; for each frequency band, converting the values (α(f)) associated with the relevant frequency band into at least one value representative of a virtual sound source oriented along the spatial direction associated with a data item stored for the relevant temporal frequency band; for each temporal frequency band, determining, on the basis of an above-mentioned representative value, a plurality of values (γ(f)) associated with the different signals (bS(t)) of the second set, respectively; constructing each signal (bS(t)) of the second set on the basis of the values (γ(f)) associated with this signal of the second set.

    METHOD FOR GENERATING A DIGITAL HOLOGRAM, ASSOCIATED DEVICE, HOLOGRAPHIC DISPLAY SYSTEM AND COMPUTER PROGRAM
    30.
    发明申请
    METHOD FOR GENERATING A DIGITAL HOLOGRAM, ASSOCIATED DEVICE, HOLOGRAPHIC DISPLAY SYSTEM AND COMPUTER PROGRAM 有权

    公开(公告)号：US20210263468A1

    公开(公告)日：2021-08-26

    申请号：US17255612

    申请日：2019-05-28

    Applicant: FONDATION B-COM

    Inventor： Antonin GILLES ,  Patrick GIOIA

    IPC: G03H1/08 ,  G02B27/01 ,  G03H1/00

    Abstract: Disclosed is a method for generating a digital hologram representing a 3D scene including an object, an object being defined by points and their associated intensity. For each object, a prior step of calculating an “omnidirectional” angular spectrum of the light field emitted by an object in the scene on the surface of a geometric solid centered on the object, a surface of the solid being sampled according to a predetermined grid, a sample of the grid being associated with a vector frequency; for the scene, the following steps: —obtaining a pose of an observer in the world frame of reference; —deriving the hologram from the scene as a function of the pose obtained from the “multidirectional” angular spectra calculated for each object. The step of calculating an angular spectrum of the light field for each object of the scene takes into account predetermined viewing directions.

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