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101.发明授权公开(公告)号：US11323715B2
公开(公告)日：2022-05-03
申请号：US16616252
申请日：2018-06-12
Applicant: FONDATION B-COM
Inventor： Felix Henry
IPC: H04B1/66 , H04N7/12 , H04N11/02 , H04N11/04 , H04N19/13 , H04N19/119 , H04N19/176 , H04N19/64 , H04L65/60
Abstract: A method for decoding an encoded data stream representative of at least one image, which is divided into blocks. The decoding method includes, for a current block: evaluating a plurality of value hypotheses of at least one description element of the current block, by calculating a likelihood measurement per hypothesis; calculating a disparity in the likelihood measurements obtained; determining at least one parameter of a decoder based on the calculated disparity; decoding, using the determined decoder, complementary information for identifying at least one of the hypotheses; and identifying at least one of the hypotheses using the decoded complementary information and obtaining a value of the at least one description element for the current block, from the at least one identified hypothesis.
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公开(公告)号：US11202032B2
公开(公告)日：2021-12-14
申请号：US17127115
申请日：2020-12-18
Applicant: FONDATION B-COM
Inventor： Foteini Tania Pouli , Cambodge Bist , Jean-Yves Aubie
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.
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103.发明授权公开(公告)号：US11159794B2
公开(公告)日：2021-10-26
申请号：US16638644
申请日：2018-07-25
Applicant: FONDATION B-COM
Inventor： Victorien Lorcy , Pierrick Philippe
IPC: 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.
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104.发明授权公开(公告)号：US11102463B2
公开(公告)日：2021-08-24
申请号：US16483306
申请日：2018-01-17
Applicant: B<>COM
Inventor： Cambodge Bist , Remi Cozot , Gerard Madec
Abstract: A method for processing at least one digital image for reproduction on a display device. The image includes image elements, an image element being associated with color information having, in a first color space, a luminance component and chrominance components. The method includes the following acts: determining a number of image elements, known as “bright” elements, at least the luminance component of which has a value greater than a first predetermined threshold; evaluating a maximum tolerated brightness value as a decreasing function of the number of counted image elements; and transforming the first luminance components of the image elements to second luminance components, including for an image element, calculating an intermediate luminance value by applying an expansion exponent to the first luminance component value and multiplying the intermediate value calculated by the evaluated maximum tolerated luminosity value.
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105.发明申请公开(公告)号：US20210240135A1
公开(公告)日：2021-08-05
申请号：US17050214
申请日：2019-03-20
Applicant: FONDATION B-COM
Inventor： Patrick GIOIA , Antonin GILLES
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.
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Patent Agency Ranking
106.发明申请公开(公告)号：US20210111707A1
公开(公告)日：2021-04-15
申请号：US16956159
申请日：2018-12-10
Applicant: B-COM
Inventor： Stéphane Paquelet , Ali Zeineddine
Abstract: A digital interpolation filter delivering a series of output samples approximating a signal x(t) at sampling instants of the form (n+d)T s based on a series of input samples of the signal x(t) taken at sampling instants of the form nT s. Such a filter implements a transfer function in the Z-transform domain, H c d (Z−1), expressed as a linear combination between: a first transfer function H 1 d (Z−1) representing a Lagrange polynomial interpolation of the input samples implemented according to a Newton structure (100); and a second transfer function H 2 d (Z−1) representing another polynomial interpolation of the input samples implemented according to another structure comprising at least the Newton structure; the linear combination being a function of at least one real combination parameter c.
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107.发明授权公开(公告)号：US10771817B2
公开(公告)日：2020-09-08
申请号：US16092359
申请日：2017-04-05
Applicant: B<>COM
Inventor： Pierrick Philippe , Victorien Lorcy , Pierre Castel
IPC: H04N19/625 , H04N19/176 , H04N19/122 , H04N19/147 , H04N19/119 , H04N19/184
Abstract: A method for decoding a current block of a digital image. The method includes: decoding coefficients of the current block; and transforming the current block into a decoded block, by implementing a first sub step to produce an intermediate block, that applies to the column and row vectors of the current block, and a second substep to produce a block of pixels that applies to the row and column vectors of the intermediate block, resulting from the first substep; and rebuilding the image from the decoded block. At least one of the first and second substeps includes, for an input row or column vector: forming a first subvector of size K
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公开(公告)号：US10686488B2
公开(公告)日：2020-06-16
申请号：US16307059
申请日：2017-05-16
Applicant: B-COM
Inventor： Stephane Paquelet , Patrick Savelli
Abstract: A method for demodulating a received signal resulting from the modulation of a basic chirp signal including estimating of a symbol carried by the received signal, implementing the following sub-steps: determining N decision components from the received signal and from a reference chirp signal obtained by modulating the basic chirp signal by a reference symbol corresponding to a symbol of rank r, a decision component of index I, denoted as a component Dl, being a function of a term, the phase of which depends quadratically on I, with I being an integer from 0 to N−1; and deciding the rank {circumflex over (k)} of the symbol carried by the received signal, from the decision component, of index k, denoted as a component Dk, having an extremum value among the N decision components.
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109.发明申请公开(公告)号：US20190319952A1
公开(公告)日：2019-10-17
申请号：US16466485
申请日：2017-10-19
Applicant: B<>COM
Inventor： Gaetan Le Guelvouit , Alexandre Garel
Abstract: A method for authenticating a user of a terminal equipment connected to a communication network, for access from this terminal equipment to a remote service hosted by a server equipment connected to the network. The method includes the following steps, implemented by the server: authenticating the user from credentials; in the event of successful user authentication, authenticating the client equipment from credentials stored in a first memory of the server in association with the user's credentials, including a command to render a first pattern, the command including parameters describing the first pattern and rendering the first pattern received from the client equipment, so-called reference pattern; deciding on authenticating the client equipment according to the evaluated score, a successful authentication being decided when the match score is greater than a predetermined threshold; and following the authentication decision, updating the credentials of the terminal equipment.
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110.发明申请公开(公告)号：US20190229958A1
公开(公告)日：2019-07-25
申请号：US16307053
申请日：2017-05-16
Applicant: B-COM
Inventor： Stephane PAQUELET , Patrick SAVELLI
Abstract: A method for generating a pulse-position-modulated signal. The signal includes a temporal succession of waveforms among Ns waveforms obtained by time shift that is an integer multiple of an elementary time duration Tc. The method includes the following steps executed for a k rank symbol among Ns symbols: obtaining, a set of N modulation coefficients cl(k), a modulation coefficient of index n, cn(k), being expressed as the product of a reference modulation coefficient cn(r) coming from the Fourier series decomposition of a reference waveform associated with a symbol of rank r multiplied by a phase shift term the argument of which is proportional to n; and generating M temporal samples of a k-th waveform carrying the symbol of rank k by Fourier transformation of said set of N modulation coefficients cl(k).
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