公开(公告)号：US20190173702A1

公开(公告)日：2019-06-06

申请号：US16085828

申请日：2017-03-16

Applicant: B-COM

Inventor： Marc Lanoiselee

IPC: H04L27/26

CPC classification number: H04L27/2605 ,  H04L27/26 ,  H04L27/2614 ,  H04L27/2617 ,  H04L27/2628 ,  H04L27/2636

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.

公开(公告)号：US20190007706A1

公开(公告)日：2019-01-03

申请号：US16066966

申请日：2016-12-16

Applicant: B<>COM

Inventor： Felix Henry

IPC: H04N19/64 ,  H04N19/39 ,  H04N19/192 ,  H04N19/119 ,  H04N19/61 ,  H04N19/176

CPC classification number: H04N19/647 ,  H04N19/119 ,  H04N19/13 ,  H04N19/136 ,  H04N19/176 ,  H04N19/18 ,  H04N19/192 ,  H04N19/39 ,  H04N19/46 ,  H04N19/50 ,  H04N19/619 ,  H04N19/91

Abstract: A method for encoding a digital image divided into a plurality of blocks of pixels. The method includes, for a current block: processing the current block to provide a set of description elements; selecting a subset of description elements to be predicted; ordering the description elements of the subset into an ordered sequence; and encoding the elements of the sequence. Encoding includes scrolling the elements of the sequence and includes, for a current element: selecting a combination of predicted values of the description elements of the current sequence from a plurality of possible combinations based on a predetermined cost criterion and from the second element, values of description elements previously processed of the initial sequence; predicting the current element of the sequence by its value in the selected combination; and encoding an indicator representative of a difference between the actual value of the current element and its predicted value.

公开(公告)号：US20180357742A1

公开(公告)日：2018-12-13

申请号：US15778657

申请日：2016-11-21

Applicant: B<>COM ,  Orange

Inventor： Felix Henry ,  Patrice Houze ,  Emilie Sirvent-Hien ,  Gaetan Le Guelvouit

IPC: G06T1/00 ,  H04N19/467 ,  H04N21/8358

CPC classification number: G06T1/0085 ,  G06T2201/0051 ,  G06T2201/0061 ,  H04N19/467 ,  H04N21/8358

Abstract: A method for processing a sequence of digital images. The method includes, for a current group: a) forming a main group including original images partitioned into spatial areas and including a watermarking zone; b) obtaining a main bitstream representing an area-based encoding of the images of the main group, in which for an area other than the watermarking area, the pixels of that zone are not predicted with reference to pixels in the watermarking area; c) for the watermarking area: forming a secondary group of images having the same temporal dimension as the main group and spatial dimensions equal to those of the watermarking area, inserting a first watermarking information value into the secondary group, and obtaining a first secondary bitstream representing images of the encoded secondary group including the first watermarking information value; and d) transmitting the main and first secondary bitstreams in the telecommunication network to a client.

公开(公告)号：US20180219602A1

公开(公告)日：2018-08-02

申请号：US15748428

申请日：2016-07-19

Applicant: B<>COM

Inventor： Stephane Paquelet ,  Remi Bonnefoi

IPC: H04B7/06

CPC classification number: H04B7/0634 ,  H04B7/0413 ,  H04B17/336

Abstract: A method for processing information representative of a transmission channel between a radio transmitter and a radio receiver. The information includes a matrix representative of the transmission channel. The method includes obtaining at least one pair of eigencharacteristics of the product of the conjugate transpose of the channel matrix with the channel matrix, consisting of non-zero eigenvalues; obtaining a measurement of a signal to noise ratio in the transmission channel; calculating at least one eigenvalue of an autocorrelation matrix of the symbols on transmission, according to a criterion of maximizing a capacity of the transmission channel, from the eigenvalues obtained; and transmitting to the radio transmitter information representative of the at least one calculated non-zero eigenvalue associated with the eigenvector.

公开(公告)号：US20170302688A1

公开(公告)日：2017-10-19

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

IPC: H04L29/06 ,  H04W88/10 ,  H04L12/26 ,  H04L9/06

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 neighbourhood of the current node, including assigning a resilience group to the neighbouring node, according to at least one piece of information representative of a resilience level of the neighbouring node to at least one type of attack; detecting an intrusion affecting at least one suspect node of the neighbourhood of the current node; establishing a consensus concerning the at least one suspect node in a neighbourhood by counting a number of resilience groups having detected the intrusion in the neighbourhood of the suspect node and a total number of resilience groups represented in the neighbourhood 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.

公开(公告)号：US09769565B2

公开(公告)日：2017-09-19

申请号：US15091315

申请日：2016-04-05

Applicant: B<>COM ,  Orange

Inventor： Andrey Fedosov ,  Jerome Daniel ,  Gregory Pallone

IPC: H04R3/00 ,  H04R5/00 ,  G06F17/15 ,  G10L19/008 ,  H04R29/00 ,  H04S3/00 ,  H04S7/00 ,  H04R5/027

CPC classification number: H04R3/005 ,  G06F17/15 ,  G10L19/008 ,  H04R5/027 ,  H04R29/005 ,  H04R2430/20 ,  H04S3/008 ,  H04S7/301 ,  H04S2400/15 ,  H04S2420/11

Abstract: A method and apparatus are provided for processing data for estimating mixing parameters of at least one audio spot signal captured by a sound recording device, called a spot microphone, arranged in the vicinity of a source among a plurality of acoustic sources constituting a sound scene, and a primary audio signal captured by an ambisonic sound recording device, arranged to capture said plurality of acoustic sources of the sound scene.

公开(公告)号：US20170142444A1

公开(公告)日：2017-05-18

申请号：US15322156

申请日：2015-06-16

Applicant: B<>COM ,  Orange

Inventor： Felix Henry

IPC: H04N19/61 ,  H04N19/115 ,  H04N19/132 ,  H04N19/91 ,  H04N19/154 ,  H04N19/18 ,  H04N19/463 ,  H04N19/103 ,  H04N19/134

CPC classification number: H04N19/61 ,  H04N19/103 ,  H04N19/115 ,  H04N19/132 ,  H04N19/134 ,  H04N19/154 ,  H04N19/18 ,  H04N19/463 ,  H04N19/50 ,  H04N19/91

Abstract: A method of encoding a digital image that is divided into a plurality of blocks of pixels. The method includes, for a current block: predicting the current block values from at least one block previously processed; calculating a residual block; obtaining a residual block by applying a transform to pixels of the residual block; selecting coefficients signs to be predicted in the transformed residual block; predicting the selected signs encoded and decoded neighbouring blocks; calculating a prediction indicator from the predictions of the selected signs and their original values; entropic encoding the indicators obtained for the predicted signs; and determining a context of a coefficient of the current residual block and the sign of a coefficient of the transformed residual block is selected based on a predetermined score associated with the encoding context of the coefficient, the score being representative of a reliability level of the prediction of the sign.