公开(公告)号：US20200007839A1

公开(公告)日：2020-01-02

申请号：US16483306

申请日：2018-01-17

Applicant: B<>COM

Inventor： Cambodge Bist ,  Remi Cozot ,  Gerard Madec

IPC: H04N9/77 ,  G06T5/00 ,  H04N9/67 ,  H04N9/68 ,  H04N5/57

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.

公开(公告)号：US20190208196A1

公开(公告)日：2019-07-04

申请号：US16300691

申请日：2017-04-27

Applicant: B-COM

Inventor： Felix Henry ,  Joel Jung ,  Charlene Mouton

IPC: H04N19/107 ,  H04N19/119 ,  H04N19/176 ,  H04N19/184 ,  G06K9/62

CPC classification number: H04N19/107 ,  G06K9/6215 ,  H04N19/11 ,  H04N19/119 ,  H04N19/176 ,  H04N19/184

Abstract: A method of decoding an encoded data stream representing at least one image subdivided into blocks. The method includes, for a current block of the image, and for each of at least two prediction modes available to predict the current block, obtaining a predictive block associated with the available mode; building a list having at least one of the available modes; for at least one mode included in the list, called a current mode, determining a distance measurement between the predictive block associated with the current mode and the other predictive blocks associated with the other available modes and obtained for the current block; modifying the list modified as a function of the determined measurement; decoding information identifying, for the current block, a prediction mode from the modified list from the encoded data stream; and rebuilding the current block from the predictive block associated with the identified prediction mode.

公开(公告)号：US20190174138A1

公开(公告)日：2019-06-06

申请号：US16092962

申请日：2017-06-19

Applicant: B<>COM

Inventor： Joel Jung ,  Felix Henry ,  Charlene Mouton

IPC: H04N19/196 ,  H04N19/103 ,  H04N19/14 ,  H04N19/593

CPC classification number: H04N19/197 ,  H04N19/103 ,  H04N19/11 ,  H04N19/14 ,  H04N19/176 ,  H04N19/593

Abstract: A method for decoding a coded data stream representative of at least one image, the image being divided into blocks, a set of at least two prediction modes being available for predicting a current block. The method includes: obtaining at least two categories of prediction modes from the set; eliminating at least one category in accordance with at least one first predetermined elimination criterion; updating the categories not eliminated by deleting prediction modes that are common with the at least one eliminated category; and decoding, from the data stream, an information identifying for the current block a prediction mode among the modes of the updated categories.

公开(公告)号：US20190149187A1

公开(公告)日：2019-05-16

申请号：US16307059

申请日：2017-05-16

Applicant: B-COM

Inventor： Stephane Paquelet ,  Patrick Savelli

IPC: H04B1/69 ,  H04L27/10 ,  H04L27/14

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 l, denoted as a component Dl, being a function of a term, the phase of which depends quadratically on l, with l 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,

公开(公告)号：US10243774B2

公开(公告)日：2019-03-26

申请号：US15516253

申请日：2015-09-29

Applicant: B<>COM ,  Orange

Inventor： Hao Lin

IPC: H04L27/26 ,  H04L5/00 ,  H04L25/02

Abstract: A method for transmitting a multi-carrier signal implementing an OQAM-type modulation, formed of a temporal succession of symbols including data elements modulating a carrier frequency of the signal. A carrier frequency modulated by one of the data elements is called a carrier, wherein a set of carriers is allocated to a transmitter unit. The method includes inserting a sequence of pilots specific to the transmitter unit at a given time into the multi-carrier signal on the allocated set of carriers. The sequence of pilots includes: a sequence of non-zero complex values, inserted on odd or even carriers, alternating with zero values, inserted on the other carriers, respectively even or odd-numbered; non-zero complex values of the sequence of pilots, their frequency transforms and inverse frequency transforms being with a constant envelope; and and a sequence of zero values modulating the carriers of the set of carriers allocated at the following time.

公开(公告)号：US20190044847A1

公开(公告)日：2019-02-07

申请号：US16075837

申请日：2017-02-03

Applicant: FONDATION B COM

Inventor： Fabrice GUILLEMIN ,  Patrice HOUZE

IPC: H04L12/707 ,  H04L12/863 ,  H04L12/841 ,  H04L12/807 ,  H04L12/805

Abstract: In the context of a transmission of data for a multipath communication from source terminal equipment to destination terminal equipment, the method: establishes, on at least one multipath communication path, a plurality of connections with the destination terminal equipment; for each path on which a said plurality of connections was established, selecting to make it active at least one connection among the plurality of established connections, the other established connections being put in reserve; distributing the data between the selected connections, referred to as active connections, in accordance with at least one predefined distribution rule, and transmitting the distributed data. Upon detecting a transmission incident via an active connection on a path on which a said plurality of connections was established, the method closes said active connection, and makes active a connection that had been put in reserve on said path.

公开(公告)号：US20180376120A1

公开(公告)日：2018-12-27

申请号：US16063441

申请日：2016-12-09

Applicant: B<>COM ,  UNIVERSITE RENNES 1 ,  INSTITUT MINES TELECOM

Inventor： Cambodge Bist ,  Remi Cozot ,  Gerard Madec

IPC: H04N9/77 ,  G06T5/00 ,  H04N9/64

Abstract: A method for processing a digital image for rendering on a display. The image includes image elements associated with color information represented in a colorimetric space having a luminance and chrominance components. The luminance component has a value in a first predetermined interval. The display can render values of luminance components included in a second predetermined interval, of greater length than the first interval. The method includes: determining information representative of image brightness perceived by an observer, based on the values of the first luminance component; calculating an expansion exponent as a function of the determined brightness information; transforming the first luminance components into second luminance components, including calculating an intermediate luminance value by applying the calculated expansion exponent to the first luminance component value and multiplying the intermediate value by the length of the second interval. The expansion exponent is a decreasing function of the determined brightness information.

公开(公告)号：US20180322639A1

公开(公告)日：2018-11-08

申请号：US15773403

申请日：2016-10-28

Applicant: B<>COM ,  INRIA ,  Institut National Sciences Appliquees

Inventor： Lucas Royer ,  Alexandre Krupa ,  Maud Marchal

IPC: G06T7/20 ,  G06T7/12 ,  G06T7/143

CPC classification number: G06T7/20 ,  G06T7/12 ,  G06T7/143 ,  G06T2207/10016 ,  G06T2207/10068 ,  G06T2207/10132 ,  G06T2207/20116

Abstract: A method of tracking a clinical target in a current image of a sequence of digital medical images, with respect to a reference image of the sequence. The method includes: obtaining a segmentation of a contour of the target from the reference image; determining a region delimiting the interior of the segmented contour of the target in the reference image; obtaining a confidence measurement per image element in the determined region for the reference and current images; deforming the contour by minimising a cost function based on an intensity difference between the current and reference images in the determined region, the cost function being weighted by the confidence measurements; and adapting the reference image at least from the intensities of the current image and the current image confidence measurements in the target region, the cost function taking into account the intensities of the adapted reference image.

公开(公告)号：US20180143589A1

公开(公告)日：2018-05-24

申请号：US15573723

申请日：2016-05-10

Applicant: B<>COM ,  Orange ,  Universite De Rennes 1 ,  INSA De Rennes

Inventor： Antonin Gilles ,  Patrick Gioia ,  Remi Cozot ,  Luce Morin

IPC: G03H1/26 ,  G03H1/04

CPC classification number: G03H1/268 ,  G03H1/0406 ,  G03H1/0443 ,  G03H1/0808 ,  G03H2001/0428 ,  G03H2001/0452 ,  G03H2001/269 ,  G03H2210/36 ,  G03H2210/452 ,  G03H2210/454 ,  G03H2226/02

Abstract: A method for digitally generating a hologram plane from a three-dimensional scene, cut into a plurality of planes parallel to the hologram plane. The method includes for a current plane: counting a number of points of the non-zero amplitude scene; choosing a first or second technique for propagating a light wave emitted by the current plane as a function of a number of points of non-zero amplitude included in the current plane and with a preset threshold value, the first, point-based technique calculating the propagation of a sum of light waves emitted by point sources constituted by the points of the scene portion of a non-zero amplitude of the current plane on a following plane, and the second, field-based technique, globally calculating a light wave emitted by the scene portion situated in the current plane on a given plane; and processing the current plane according to the chosen propagation technique.

公开(公告)号：US20170331875A1

公开(公告)日：2017-11-16

申请号：US15527979

申请日：2015-11-26

Applicant: B<>COM ,  Orange

Inventor： Patrice Houze

IPC: H04L29/06

Abstract: Processing a request for delivery of data sent by a customer terminal to a remote server via a telecommunication network. The terminal accesses the network by at least two links of distinct access types. The data is encoded in a stream with a predetermined bit rate, which is cut into segments. Processing includes, for a segment of the stream: determining a sub-segment size based on the number of links and a size of the data stream to be delivered; calculating a partitioning of the segment into sub-segments according to the set size and a distribution of the sub-segments on the plurality of links, according to a scheduling of the sub-segments in the partitioning and a time constraint; and sending a plurality of sub-segment transmission requests to the server over the plurality of links, each request including an identifier of the segment and indexes of a sub-segment start and end.