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81.发明申请公开(公告)号：US20210136375A1
公开(公告)日：2021-05-06
申请号：US16638644
申请日：2018-07-25
Applicant: B<>COM
Inventor： Victorien Lorcy , Pierrick Philippe
IPC: H04N19/12 , H04N19/119 , H04N19/60 , H04N19/176
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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公开(公告)号：US10924737B2
公开(公告)日：2021-02-16
申请号：US15740198
申请日：2016-06-16
Applicant: B<>COM
Inventor： Pierrick Philippe
IPC: H04N19/44 , H04N19/96 , H04N19/52 , H04N19/625 , H04N19/593 , H04N19/61 , H04N19/124 , H04N19/18 , H04N19/12 , H04N19/463 , H04N19/14 , H04N19/176
Abstract: Encoding a digital image divided into a plurality of blocks of pixels processed in a defined order, including the following steps, implemented for a current block, with preset sizes: predicting values of the current block from at least one block previously processed; calculating a residual block by subtracting the predicted values from the original values of the current block; obtaining a residual block by applying a transform to pixels of the residual block, said transformed residual block comprising coefficients; encoding the transformed residual block; calculating at least one characteristic representative of at least one transformed residual coefficient of the current block; determining initial identification data representative of a sub-list of at least one transform associated with said at least one calculated characteristic; and verifying that the transform applied to the current block is part of the sub-list identified by the initial data.
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83.发明申请公开(公告)号：US20210004968A1
公开(公告)日：2021-01-07
申请号：US16913437
申请日：2020-06-26
Applicant: FONDATION B-COM
Inventor： Albert MURIENNE , Laurent LAUNAY
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.
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公开(公告)号：US10812814B2
公开(公告)日：2020-10-20
申请号：US16092962
申请日：2017-06-19
Applicant: B<>COM
Inventor： Joel Jung , Felix Henry , Charlene Mouton
IPC: H04N19/196 , H04N19/11 , H04N19/103 , H04N19/176 , H04N19/593 , H04N19/14
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.
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85.发明授权公开(公告)号：US10798383B2
公开(公告)日：2020-10-06
申请号：US16320798
申请日：2017-07-12
Applicant: B<>COM
Inventor： Felix Henry , Gordon Clare
IPC: H04N19/13 , H04N19/136 , H04N19/184 , H04N19/132 , H04N19/85 , H04N19/91 , H04N19/176 , H04N19/70 , H04N19/895 , H04N19/40
Abstract: A method for decoding a stream having first and second portions portion and representing an image divided into blocks. The method includes a sequence test having a predetermined non-zero number of bits, including two at the power of the predetermined number (2N) iterations of the following substeps, for a current block: obtaining a sequence distinct from sequences already tested; decoding and reconstructing a version of the current block from the obtained sequence and from coded data in the first portion; evaluating a likelihood measurement associated with the reconstructed block; decoding information characteristic of a first sequence including the predetermined number of binary symbols from the second portion; selecting a sequence from the sequences tested, based on the likelihood measurements and the decoded information, the selected sequence being identified as the first sequence; and decoding and reconstructing the current block from the first sequence and the first portion.
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Patent Agency Ranking
86.发明申请公开(公告)号：US20200068183A1
公开(公告)日：2020-02-27
申请号：US16288554
申请日：2019-02-28
Applicant: B<>COM
Inventor： Cambodge Bist , Remi Cozot , Gerard Madec
IPC: H04N9/77
Abstract: A method for processing a digital image including image elements having a first luminance component. The first luminance component has a first value in a first predetermined interval. The display can render second values of second luminance components included in a second predetermined interval. The method includes: determining information representative of image brightness perceived by an observer, based on the first values of the first luminance component; calculating an expansion exponent as a function of the determined brightness information; transforming the first luminance components into the second luminance components, including calculating an intermediate luminance value by applying the calculated expansion exponent to the first luminance component value, multiplying the intermediate value by a length of the second interval, and obtaining the second value of the second luminance component based on the multiplied intermediate luminance value. The expansion exponent is based on a logarithm, of the determined brightness information.
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公开(公告)号：US10432440B2
公开(公告)日：2019-10-01
申请号：US16085828
申请日：2017-03-16
Applicant: B-COM
Inventor： Marc Lanoiselee
Abstract: A method is proposed for generating an OFDM type multicarrier signal including OFDM blocks constituted by M carriers modulated by source symbols. The method includes the following steps: interleaving the M symbols of a block of source symbols into R sub-blocks of N interleaved symbols; obtaining a block of M time domain samples corresponding to the block of M source symbols; forming a peak vector containing N maximum amplitudes determined from among the M samples; attenuating the extrema of each sub-block of N time domain samples corresponding to the R sub-blocks of N interleaved symbols by a correction of symbols taking account of the peak vector and delivering R sub-blocks of N corrected interleaved symbols; de-interleaving the R sub-blocks of N corrected interleaved symbols delivering a block of M corrected source symbols; generating an OFDM block of the signals corresponding to the block of M corrected source symbols.
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公开(公告)号：US10425431B2
公开(公告)日：2019-09-24
申请号：US15516577
申请日：2015-09-30
Applicant: B<>COM , Universite de Bretagne Occidentale , Institut Mines Telecom
Inventor： David Espes , Nora Cuppens
Abstract: A method for processing an intrusion in a communication network including a plurality of node equipment, including a current node, which: discovers of a neighborhood of the current node, including assigning a resilience group to the neighboring node, according to at least one piece of information representative of a resilience level of the neighboring node to at least one type of attack; detecting an intrusion affecting at least one suspect node of the neighborhood of the current node; establishing a consensus concerning the at least one suspect node in a neighborhood by counting a number of resilience groups having detected the intrusion in the neighborhood of the suspect node and a total number of resilience groups represented in the neighborhood of the suspect node; and deciding to change a status of the suspect node based on a result of the consensus by comparison of both numbers.
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89.发明授权公开(公告)号：US10326971B2
公开(公告)日：2019-06-18
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
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.
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90.发明申请公开(公告)号：US20190158841A1
公开(公告)日：2019-05-23
申请号：US16320798
申请日：2017-07-12
Applicant: B<>COM
Inventor： Felix Henry , Gordon Clare
IPC: H04N19/13 , H04N19/132 , H04N19/70 , H04N19/184 , H04N19/176
Abstract: A method for decoding a stream having first and second portions portion and representing an image divided into blocks. The method includes a sequence test having a predetermined non-zero number of bits, including two at the power of the predetermined number (2N) iterations of the following substeps, for a current block: obtaining a sequence distinct from sequences already tested; decoding and reconstructing a version of the current block from the obtained sequence and from coded data in the first portion; evaluating a likelihood measurement associated with the reconstructed block; decoding information characteristic of a first sequence including the predetermined number of binary symbols from the second portion; selecting a sequence from the sequences tested, based on the likelihood measurements and the decoded information, the selected sequence being identified as the first sequence; and decoding and reconstructing the current block from the first sequence and the first portion.
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