Patents by Inventor Frederic Lefebvre

Frederic Lefebvre has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10021395
    Abstract: A particular implementation determines parameters of a generative probabilistic model from visual descriptors extracted from at least one image. The extracted visual descriptors are quantized and encoded using the model-based arithmetic encoding to be stored or for transmission to a decoder. The model parameters are also stored to be available to a decoder, or transmitted directly to a decoder. A decoder uses the stored, or received, model parameters to reconstruct the generative probabilistic model and then to decode the visual descriptors. The visual descriptors are used for image analysis tasks, such as image retrieval or object detection. A particular implementation uses a Gaussian mixture model as a generative probabilistic model.
    Type: Grant
    Filed: November 27, 2015
    Date of Patent: July 10, 2018
    Assignee: Thomson Licensing
    Inventors: Alexey Ozerov, Jean-Ronan Vigouroux, Frederic Lefebvre
  • Publication number: 20180150463
    Abstract: The present disclosure relates to a method for selecting at least one item, from a plurality of items described by a plurality of attributes, accounting for a value and a weighting factor assigned to one of the attributes. According to at least one embodiment, the same weighting factor is assigned to the values of the same attribute for each of the items, and the method comprises: -adjusting one of the weighting factors according to an adjustment element received by a communication terminal; -selecting one of the items accounting for the adjusted weighting factor.
    Type: Application
    Filed: May 26, 2016
    Publication date: May 31, 2018
    Inventors: Joel SIROT, Frederic LEFEBVRE, Vincent DEMOULIN, Tomas Enrique CRIVELLI
  • Publication number: 20170353306
    Abstract: A method for pairing a first device with a second device is disclosed. A salient idea is to generate a discriminant and visually differentiable visual representation from a unique identifier of a device, to make it available for example together with the unique identifier on a printed package of the device, and to regenerate it for display as part of the pairing process. A user checking the displayed visual representation matches the printed visual representation of the package can successfully terminate a pairing process.
    Type: Application
    Filed: May 30, 2017
    Publication date: December 7, 2017
    Inventors: Frederic LEFEBVRE, Alain Verdier, Christophe Vincent, Olivier Heen, Cyrille Gandon
  • Patent number: 9838757
    Abstract: The application concerns a method for transmitting video data in a data stream and associated metadata, said metadata representing associated video data structure. The method comprises the steps of—determining the structure of the video data, —splitting said structure into chunks in an incremental manner, —transmitting said chunks in the data stream at time intervals before the video data it is related to. The application concerns also a method for transmitting fingerprint information associated with video data into a video data stream. The method comprises the steps of: —determining fingerprint associated with at least one frame of said video data, —inserting at least a message into the video stream comprising said fingerprint information.
    Type: Grant
    Filed: April 10, 2008
    Date of Patent: December 5, 2017
    Assignee: Thomson Licensing
    Inventors: Louis Chevallier, Lionel Oisel, Francois Le Clerc, Frederic Lefebvre
  • Publication number: 20170192855
    Abstract: The present disclosure relates to a method, adapted to be implemented in an electronic device, for selecting a content, during a backup operation, amongst a plurality of contents coding audiovisual data and being accessible by the electronic device. According to one embodiment, the method includes obtaining, for each accessible content, one audiovisual descriptor derived from the audiovisual data, and selecting the accessible content according to one backup rule taking into account the obtained audiovisual descriptor. The present disclosure also relates to corresponding electronic device, system, computer readable program product and computer readable storage medium.
    Type: Application
    Filed: December 28, 2016
    Publication date: July 6, 2017
    Inventors: Frederic LEFEBVRE, Himalaya JAIN, Patrick PEREZ
  • Publication number: 20170094127
    Abstract: A method for color grading a first color frame according to a first reference color frame is described. The method includes selecting a color transformation already applied to one second color frame, according to a second reference color frame, the second color frame being different from the first color frame and applying, to said first color frame, the selected color transformation. The disclosure also relates to corresponding electronic device, computer readable program product and computer readable storage medium.
    Type: Application
    Filed: September 28, 2016
    Publication date: March 30, 2017
    Inventors: Pierre HELLIER, Vincent DEMOULIN, Frederic LEFEBVRE
  • Patent number: 9530170
    Abstract: Rendering second screen information on a second screen device. A user device receives information characterizing the source of a content data stream and the content data stream; generates a watermark payload using a plurality of parameters comprising the information and a time of the user device; and inserts a watermark comprising the watermark payload into the content data stream that is rendered. The second screen device captures the watermark and extracts the watermark payload and then at least one of the plurality of parameters; generates, using the at least one extracted parameter, a request that is sent the request to a server; receives information from the server in response to the request; and displays the received information on a screen of the second screen.
    Type: Grant
    Filed: July 30, 2013
    Date of Patent: December 27, 2016
    Assignee: Thomson Licensing
    Inventors: Olivier Heen, Frederic Lefebvre
  • Patent number: 9519955
    Abstract: The method comprises the generation of a deteriorated image associated with a first bit rate and of a deteriorated color transform associated with a second bit rate, an evaluation of a first distortion by comparison of the image with a first test image obtained by the application of the color transform to the deteriorated image, and of a second distortion by comparison of the image with a second test image obtained by the application of the deteriorated color transform to the image, and the determination of a final conjoint bit rate associated with a best trade-off between a conjoint bit rate (R=R1+R2) and a global distortion (dE=dE1+DE2). The optimized deteriorated image and the optimized deteriorated color transform are then embedded based on this conjoint bit rate.
    Type: Grant
    Filed: November 11, 2014
    Date of Patent: December 13, 2016
    Assignee: THOMSON LICENSING
    Inventors: Jurgen Stauder, Frederic Lefebvre, Patrick Morvan
  • Patent number: 9519800
    Abstract: A device and a method for online storage, device and method for searching for similar content, a device and a method of transmission and a device and a method. Encrypted data is saved at a provider of online services. With the encrypted data, encrypted hashing data is saved with a public key and the content to save is encrypted with the encrypted hash. This advantageously enables data duplication at the online service provider to be prevented while preserving the private life of the users of the service. In order to search for content similar to reference multimedia data, fingerprints are also saved at the service provider. In order to limit the number of false positives returned, the fingerprint can further contain a search fingerprint, an encrypted selection fingerprint.
    Type: Grant
    Filed: December 16, 2011
    Date of Patent: December 13, 2016
    Assignee: Thomson Licensing
    Inventors: Luis Montalvo, Nicolas Le Scouarnec, Serge Defrance, Frederic Lefebvre, Patrick Perez
  • Publication number: 20160360150
    Abstract: Isolation of an active participant in a group of participants commences by first capturing images and audio of participants. Thereafter, an active one of the participants in the group of participants (e.g., a participant that is currently speaking) is identified. After identification of the active participant, at least one of participants' images and participants' audio are rendered to isolate the active participant.
    Type: Application
    Filed: June 3, 2016
    Publication date: December 8, 2016
    Inventors: Stephane ONNO, Alexey OZEROV, Quang Khanh Ngoc DUONG, Frederic LEFEBVRE
  • Patent number: 9473829
    Abstract: Selective data encryption of a file, in particular an H.264/MPEG-4 AVC data stream. If a first unit in the data stream is to be encrypted, it is encrypted and the encryption is put into a further unit, preferably in the data stream. A substitution unit is generated and put in the place of the first unit; if necessary, at least one header value is taken from the first unit for use in the substitution unit. A decryptor receives the encrypted data stream, extracts and decrypts the further unit and replaces the substitution unit with a regenerated first unit.
    Type: Grant
    Filed: September 12, 2012
    Date of Patent: October 18, 2016
    Assignee: Thomson Licensing
    Inventors: Frédéric Lefebvre, Séverine Baudry, Antoine Robert, Philippe Roudot
  • Publication number: 20160247512
    Abstract: Methods and apparatus for generating a fingerprint of an audio signal are disclosed. The method comprises: detecting peaks in a representation of a temporal spectrum of frequencies of the audio signal, a peak being defined as a point in the representation which has a higher energy than its neighboring points; and generating the fingerprint of the audio signal as a function of a distribution of positions of the detected peaks along a frequency axis and a distribution of positions of the detected peaks along a time axis. The fingerprint of the disclosure is not only robust to many types of noise, but also robust against time scale modification and frequency shifting.
    Type: Application
    Filed: November 21, 2015
    Publication date: August 25, 2016
    Inventors: Quang Khanh Ngoc DUONG, Alexey OZEROV, Frederic LEFEBVRE
  • Publication number: 20160219277
    Abstract: A particular implementation determines parameters of a generative probabilistic model from visual descriptors extracted from at least one image. The extracted visual descriptors are quantized and encoded using the model-based arithmetic encoding to be stored or for transmission to a decoder. The model parameters are also stored to be available to a decoder, or transmitted directly to a decoder. A decoder uses the stored, or received, model parameters to reconstruct the generative probabilistic model and then to decode the visual descriptors. The visual descriptors are used for image analysis tasks, such as image retrieval or object detection. A particular implementation uses a Gaussian mixture model as a generative probabilistic model.
    Type: Application
    Filed: November 27, 2015
    Publication date: July 28, 2016
    Inventors: Alexey OZEROV, Jean-Ronan Vigouroux, Frederic Lefebvre
  • Patent number: 9376636
    Abstract: A process of hydrodesulphuration of at least one gasoline cut implementing a catalyst comprising, in its oxide form, at least one metal from group VIB and/or at least one metal from group VIII of the periodic table, present in the form of at least one polyoxometalate of the formula (HhXxMmOy)q?, wherein X is an element selected from phosphorus, silicon, boron, nickel and cobalt, M is one or more element(s) selected from molybdenum, tungsten, nickel and cobalt, h is an integer from 0-12, x is an integer from 0-4, m is an integer 5, 6, 7, 8, 9, 10, 11, 12 and/or 18, y is an integer of 17-72 and q is an integer of 1-20, the polyoxometalates being present within a mesostructured silicon oxide matrix having a pore size of 1.5-50 nm and having amorphous walls of thickness 1-30 nm, the catalyst being sulphured before use in the process.
    Type: Grant
    Filed: December 15, 2011
    Date of Patent: June 28, 2016
    Assignees: CNRS, IFP ENERGIES NOUVELLES
    Inventors: Karin Marchand, Elodie Devers, Alexandra Chaumonnot, Audrey Bonduelle, Veronique Dufaud, Frederic Lefebvre, Manuela Bader, Susana Lopes Silva
  • Publication number: 20160180187
    Abstract: A method of generating a descriptor includes determining, in an image, a circular region having a center at an interest point to be described; extracting strips extending in the circular region in mutually different directions and intersecting together at the interest point; dividing each of the strips into patches; characterizing each of the patches using Haar features to acquire elements of the descriptor corresponding to the respective Haar features; and reordering the elements of the descriptor according to the strip corresponding to a maximum local.
    Type: Application
    Filed: December 23, 2015
    Publication date: June 23, 2016
    Inventors: Frederic LEFEBVRE, Vincent DEMOULIN
  • Patent number: 9340733
    Abstract: The invention relates to a process of hydrodesulphuration of at least one gasoil cut implementing a catalyst containing, in its oxide form, at least one metal from group VIB and/or at least one metal from group VIII of the periodic table, present in the form of at least one polyoxometalate of the formula (HhXxMmOy)q?, said polyoxometalates being present within a mesostructured silicon oxide matrix having a pore size within the range 1.5 to 50 nm and having amorphous walls of thickness within the range 1 to 30 nm, the said catalyst being sulphured before being implemented in the said process.
    Type: Grant
    Filed: February 18, 2014
    Date of Patent: May 17, 2016
    Assignees: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, IFP ENERGIES NOUVELLES
    Inventors: Karin Marchand, Alexandra Chaumonnot, Audrey Bonduelle, Magalie Roy-Auberger, Veronique Dufaud, Frederic Lefebvre, Manuela Bader, Susana Lopes Silva
  • Patent number: 9321973
    Abstract: A process for the hydrocracking a hydrocarbon-containing feedstock in which at least 50% by weight of the compounds have an initial boiling point above 340° C. and a final boiling point below 540° C., using a catalyst having, in its oxide form, at least one metal selected from the metals of groups VIB, VIII and VB, said metals being present in the form of at least one polyoxometallate of formula (HhXxMmOy)q?, said polyoxometallates being present within a mesostructured matrix based on oxide of at least one element Y, said matrix having a pore size between 1.5 and 50 nm and having amorphous walls of thickness between 1 and 30 nm, said catalyst being sulphurized before used in said process.
    Type: Grant
    Filed: December 15, 2011
    Date of Patent: April 26, 2016
    Assignees: IFP ENERGIES NOUVELLES, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
    Inventors: Karin Marchand, Alexandra Chaumonnot, Audrey Bonduelle, Veronique Dufaud, Frederic Lefebvre, Manuela Bader, Susana Lopes Silva
  • Publication number: 20160110609
    Abstract: A temporal section that is defined by boundary images is selected in a video sequence. A maximum of k stable image frames are selected in the temporal section of image frames having a lowest temporal activity. Image fingerprints are computed from the selected stable image frames. A mega-frame image fingerprint data structure is constructed from the computed fingerprints.
    Type: Application
    Filed: April 25, 2014
    Publication date: April 21, 2016
    Inventors: Frederic Lefebvre, Joaquin Zepeda Salvatierra, Patrick Perez
  • Patent number: 9141884
    Abstract: The present invention relates to the field of management of image data in data storage. In particular, the present invention relates to a method and device for automatic detection of duplicate images in data storage and corresponding device while taking into account user perception of what he considers to be duplicate images, which method and device are particularly efficient with regard to the personalized, automatic management of large amounts of image data.
    Type: Grant
    Filed: December 18, 2012
    Date of Patent: September 22, 2015
    Assignee: Thomson Licensing
    Inventors: Luis Montalvo, Serge Defrance, Remy Gendrot, Frederic Lefebvre
  • Patent number: D865603
    Type: Grant
    Filed: March 29, 2018
    Date of Patent: November 5, 2019
    Assignee: YAMAHA HATSUDOKI KABUSHIKI KAISHA
    Inventors: Hyunchoul Jeung, Philip Graeme Allen, Hsin Hsu, Maxime Frederic Lefebvre