Patents by Inventor Tangi POIRIER

Tangi POIRIER 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).

  • METHOD AND DEVICE FOR PICTURE ENCODING AND DECODING
    Publication number: 20220021869
    Abstract: A decoding method is disclosed. It comprises: —decoding parameters for a current block; —disabling a first coding tool for said current block in the case where one or more of the following conditions is verified: a second coding tool is used for said current block and a given condition on the decoded parameters is verified; —enabling for said current block said first coding tool otherwise; and —decoding said current block using said first coding tool if said first coding tool is enabled.
    Type: Application
    Filed: November 15, 2019
    Publication date: January 20, 2022
    Inventors: Philippe Bordes, Tangi Poirier, Ya Chen
  • ENCODING AND DECODING METHODS AND CORRESPONDING DEVICES
    Publication number: 20220021879
    Abstract: A decoding method for decoding a block of an image is disclosed that comprises: determining a split mode for said block in a set of split modes; splitting said block into at least two sub-blocks responsive to said split mode; decoding each of the at least two sub-blocks; wherein said set of split modes comprises at least one split mode for asymmetrically splitting said block into the at least two sub-blocks.
    Type: Application
    Filed: August 12, 2021
    Publication date: January 20, 2022
    Inventors: Fabrice LELEANNEC, Antoine ROBERT, Tangi POIRIER
  • Encoding and decoding methods and corresponding devices
    Patent number: 11228759
    Abstract: A decoding method for decoding a block of an image is disclosed that comprises:—determining a split mode for said block in a set of split modes;—splitting said block into at least two sub-blocks responsive to said split mode;—decoding each of the at least two sub-blocks; wherein said set of split modes comprises at least one split mode for asymmetrically splitting said block into the at least two sub-blocks.
    Type: Grant
    Filed: September 25, 2017
    Date of Patent: January 18, 2022
    Assignee: INTERDIGITAL MADISON PATENT HOLDINGS, SAS
    Inventors: Fabrice Leleannec, Antoine Robert, Tangi Poirier
  • UNIFIED PROCESS AND SYNTAX FOR GENERALIZED PREDICTION IN VIDEO CODING/DECODING
    Publication number: 20220014778
    Abstract: At least a method and an apparatus are provided for efficiently encoding or decoding video. For example, a plurality of different motion prediction modes are obtained for a current block. The current block is encoded or decoded based on a combination of the plurality of different motion prediction modes with corresponding weights, wherein the combination with the corresponding weights comprising at least two inter prediction modes, or an inter prediction mode and an intra prediction mode. Both triangle prediction and multi-hypothesis prediction are allowed to be indicated in one or more lists of possible motion vector candidates, such as, e.g., in advanced motion vector prediction (AMVP) mode.
    Type: Application
    Filed: November 19, 2019
    Publication date: January 13, 2022
    Inventors: Franck Galpin, Antoine Robert, Tangi Poirier
  • Method and apparatus for adaptive illumination compensation in video encoding and decoding
    Patent number: 11223830
    Abstract: Different implementations are described for determining one or more illumination compensation parameters for a current block being encoded by a video encoder or decoded by a video decoder. A plurality of motion vectors for a current block being encoded in a picture are determined. One or more illumination compensation parameters for each of the plurality of motion vectors are determined and encoded or decoded. The current block is then encoded or decoded using the plurality of motion vectors and the one or more illumination compensation parameters for each of the plurality of motion vectors. In one embodiment, a flag is used to signal the use or not of the illumination compensation. In another embodiment, the illumination compensation flag is not encoded or decoded if illumination compensation is not used.
    Type: Grant
    Filed: January 22, 2019
    Date of Patent: January 11, 2022
    Assignee: InterDigital VC Holdings, Inc.
    Inventors: Tangi Poirier, Fabrice Leleannec, Franck Galpin, Ya Chen
  • Method and apparatus for restricting binary-tree split mode coding and decoding
    Patent number: 11218738
    Abstract: Binary tree split mode coding is performed while encoding digital video image blocks using a quad tree plus binary tree coding. The quadtree split can be represented by some combinations of horizontal and vertical binary tree split. Blocks are constrained to be split down to a minimum block size and with certain split constraints such that some redundant tree structures are avoided. Redundant syntax in coding the binary tree split mode syntax element is removed to provide coding efficiency.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: January 4, 2022
    Assignee: INTERDIGITAL MADISON PATENT HOLDINGS, SAS
    Inventors: Tangi Poirier, Fabrice Leleannec, Fabien Racape
  • REDUCING REDUNDANCY BETWEEN TREE TYPES
    Publication number: 20210409709
    Abstract: An improvement in coding efficiency is achieved through restrictions on successive divisions of asymmetric splitting in advanced video coding algorithms, which frequently rely on splitting of a block of video data prior to coding using several transform sizes. Successive divisions of asymmetric splitting are forbidden if an equivalent split can be attained using triple splitting. In an embodiment, a video block is split using successive splits, but the second type of split is dependent on the first type of split.
    Type: Application
    Filed: August 12, 2021
    Publication date: December 30, 2021
    Inventors: Fabrice LELEANNEC, Tangi POIRIER, Gagan RATH, Fabrice URBAN
  • METHOD AND APPARATUS FOR SELECTING A CODING MODE USED FOR ENCODING/DECODING A RESIDUAL BLOCK
    Publication number: 20210400271
    Abstract: The present principles relate to a method and device. A method for encoding a residual block comprises: obtaining (500) a first coding mode relative to a first 2D transform when coding the residual blocks according to a coding mode relative to a first 2D transform is enabled; obtaining (510) a second coding mode relative to a second 2D transform when coding the residual blocks according to a coding mode relative to a second 2D transform is enabled; and encoding (530) the residual block according to either said first coding mode or said second coding mode or both; the method is characterized in that enabling or disabling (520) the coding of the residual block according to said second coding mode depends on said first coding mode. The present principles relate also to a method and device for encoding/decoding a picture.
    Type: Application
    Filed: July 16, 2021
    Publication date: December 23, 2021
    Inventors: Fabrice URBAN, Tangi POIRIER, Fabrice LELEANNEC
  • TRIANGLE AND MULTI-HYPOTHESIS COMBINATION FOR VIDEO CODING AND DECODING
    Publication number: 20210400269
    Abstract: At least a method and an apparatus are provided for efficiently encoding or decoding video. For example, a plurality of different motion prediction modes for a current block are obtained. The current block is encoded or decoded based on a combination of the plurality of different motion prediction modes with corresponding weights for a plurality of sub-blocks of the current block, wherein the combination with the corresponding weights comprising an inter prediction mode and an intra prediction mode.
    Type: Application
    Filed: November 19, 2019
    Publication date: December 23, 2021
    Inventors: Tangi Poirier, Karam Naser, Edouard Francois
  • METHOD AND DEVICE FOR ENCODING/DECODING AN IMAGE UNIT COMPRISING IMAGE DATA REPRESENTED BY A LUMINANCE CHANNEL AND AT LEAST ONE CHROMINANCE CHANNEL
    Publication number: 20210385466
    Abstract: The present principles relates to a method for encoding an image unit comprising image data represented by a luminance channel and at least one chrominance channel, the method comprising obtaining a luma coding-tree by splitting a luminance unit representative of the luminance channel of said image unit and obtaining a chroma coding-tree by splitting a chrominance unit representative of at least one chrominance channel of said image unit. The method is characterized in that obtaining said chroma coding-tree comprises: determining whether said chroma coding-tree and said luma coding-tree are identical; and signaling an information data indicating whether said chroma coding-tree and said luma coding-tree are identical.
    Type: Application
    Filed: August 20, 2021
    Publication date: December 9, 2021
    Inventors: Fabrice URBAN, Franck GALPIN, Tangi POIRIER, Fabrice LELEANNEC
  • PARAMETER GROUPING AMONG PLURAL CODING UNITS FOR VIDEO ENCODING AND DECODING
    Publication number: 20210385471
    Abstract: At least a method and an apparatus are presented for encoding or decoding video and can involve, for example, obtaining a group of coding units including two or more of a plurality of coding units divided from a current block wherein the two or more of the plurality of coding units share a coding parameter, and the group of coding units overlaps at least two different pipeline units associated with a pipelined decoding operation, and encoding or decoding the current block based on the group of coding units, and the shared coding parameter.
    Type: Application
    Filed: October 31, 2019
    Publication date: December 9, 2021
    Inventors: Fabrice Le Leannec, Tangi Poirier, Karam Naser
  • Wavefront parallel processing of luma and chroma components
    Patent number: 11197006
    Abstract: At least a method and an apparatus are presented for improving parallelization for wavefront parallel encoding and decoding of luma and chroma components of a vide picture. For example, a luma component and a chroma component of a video picture are independently subdivided into respectively a plurality of luma coding units and a plurality of chroma coding units. A context-based adaptive binary coding context variable is propagated from a previous row to a current row of the independently subdivided plurality of luma coding units, and a context-based adaptive binary coding context variable is propagated from a previous row to a current row of the independently subdivided plurality of chroma coding units. The video picture is encoded or decoded using the propagations to provide the wavefront parallel processing.
    Type: Grant
    Filed: June 21, 2019
    Date of Patent: December 7, 2021
    Assignee: InterDigital VC Holdings, Inc.
    Inventors: Tangi Poirier, Fabrice Le Leannec, Franck Galpin
  • METHOD AND DEVICE FOR PICTURE ENCODING AND DECODING
    Publication number: 20210377517
    Abstract: A decoding method is presented. An illumination compensation parameter is first determined for a current block of a picture. The illumination compensation parameter is determined from one or more illumination compensation parameters or from one or more reconstructed samples of at least one spatially neighbor block only in the case where said at least one spatially neighbor block belongs to the same local illumination compensation group as the current block, called current local illumination compensation group. Finally, the current block is reconstructed using the determined illumination compensation parameter.
    Type: Application
    Filed: September 19, 2019
    Publication date: December 2, 2021
    Inventors: Ya CHEN, Tangi POIRIER, Philippe BORDES, Fabrice LELEANNEC, Franck GALPIN
  • METHOD AND APPARATUS FOR INTRA PREDICTION USING A COMPOSITE REFERENCE ARRAY
    Publication number: 20210377516
    Abstract: Methods and apparatus for intra prediction in video encoding and decoding using a composite reference array are described. In one exemplary embodiment, the composite reference array is formed from two or more reference arrays of a plurality of reference arrays. The composite reference array can be formed by projecting along a prediction direction, one or more of the plurality of reference arrays onto a reference array closest to the block of the video data being encoded or decoded. The filter coefficients for the interpolation filter are then determined based on the locations of the predictors on different reference arrays. Interpolating reference samples from different reference arrays, the predictor value for a target sample can be obtained.
    Type: Application
    Filed: April 8, 2019
    Publication date: December 2, 2021
    Inventors: Gagan RATH, Tangi Poirier, Fabrice Urban
  • Method and device for tone-mapping a picture by using a parametric tone-adjustment function
    Patent number: 11182882
    Abstract: The present principles relates to a method and device for tone-mapping an input picture by using a parametric tone-adjustment function. The method is characterized in that the method comprises determining at least one parameter of said tone-adjustment function modulated by a brightness level of the input picture.
    Type: Grant
    Filed: July 7, 2016
    Date of Patent: November 23, 2021
    Assignee: INTERDIGITAL MADISON PATENT HOLDINGS, SAS
    Inventors: Fabrice Leleannec, Sebastien Lasserre, Tangi Poirier, Edouard Francois
  • TRANSLATIONAL AND AFFINE CANDIDATES IN A UNIFIED LIST
    Publication number: 20210352294
    Abstract: At least a method and an apparatus are presented for efficiently encoding or decoding video. For example, one or more prediction models are determined respectively for one or more prediction candidates used for the video encoding based on one or more control point motion vectors of a current block of the video being encoded or decoded. It is determined from the one or more control point motion vectors that a first prediction model of the one or more prediction models may be a translational prediction model. It is also determined from the one or more control point motion vectors that a second prediction model of the one or more prediction models is to be an affine prediction model. The video is encoded or decoded based on a candidate list comprising the one or more prediction candidates determined respectively from the one or more prediction models.
    Type: Application
    Filed: September 4, 2019
    Publication date: November 11, 2021
    Inventors: Franck GALPIN, Tangi POIRIER, Ya CHEN
  • BLOCK SIZED BASED TRANSFORM RESTRICTIONS
    Publication number: 20210352325
    Abstract: A coding unit having a size multiple of three in horizontal or vertical direction is coded through one of several embodiments. In one embodiment, for some block sizes, the coding unit is coded and decoded systematically through SKIP mode. In another embodiment, the coding units can be coded in SKIP mode or with a DC coefficient. In another embodiment, an asymmetric division of a common coding unit parent is performed and transform coefficients are factorized among at least two sub-blocks to encode a coding unit. In another embodiment, a separable two dimensional transform can be applied by applying a transform over the block in one direction, and using two one- dimensional transforms on sub-blocks in the other direction to code. Methods, apparatus, and signal embodiments are provided for encoding and decoding.
    Type: Application
    Filed: July 21, 2021
    Publication date: November 11, 2021
    Inventors: Fabrice LELEANNEC, Franck GALPIN, Tangi POIRIER
  • Method and apparatus for intra prediction with multiple weighted references
    Patent number: 11172221
    Abstract: A method of performing intra prediction for encoding or decoding uses multiple layers of reference samples. The layers are formed into reference arrays that are used by a function, such as a weighted combination, to form a final prediction. The prediction is used in encoding or decoding a block of video data. The weights can be determined in a number of ways, and for a given prediction mode, the same weights, or different weights can be used for all pixels in a target block. If the weights are varied, they can depend on the distance of the target pixel from reference arrays.
    Type: Grant
    Filed: June 25, 2018
    Date of Patent: November 9, 2021
    Assignee: InterDigital Madison Patent Holdings, SAS
    Inventors: Tangi Poirier, Gagan Rath, Fabrice Urban
  • Reducing redundancy between tree types
    Patent number: 11146790
    Abstract: An improvement in coding efficiency is achieved through restrictions on successive divisions of asymmetric splitting in advanced video coding algorithms, which frequently rely on splitting of a block of video data prior to coding using several transform sizes. Successive divisions of asymmetric splitting are forbidden if an equivalent split can be attained using triple splitting. In an embodiment, a video block is split using successive splits, but the second type of split is dependent on the first type of split.
    Type: Grant
    Filed: March 23, 2018
    Date of Patent: October 12, 2021
    Assignee: INTERDIGITAL VC HOLDNGS, INC.
    Inventors: Fabrice Leleannec, Tangi Poirier, Gagan Rath, Fabrice Urban
  • Method and apparatus for most probable mode (MPM) reordering for intra prediction
    Patent number: 11140414
    Abstract: To construct an MPM set for encoding or decoding an intra prediction mode, a plurality of neighbor blocks may be used. In one implementations, two above-intermediate neighbor blocks, such as those specified by sample locations at a distance equal to the height or half of the width may be used for a flat rectangular block, or two left-intermediate neighbor blocks, such as those specified by sample locations at a distance equal to the width or half of the height may be used for a tall rectangular block. The order of searching the neighbor blocks can be based on the current block's shape, or based on the distance between a neighbor's intra prediction mode and a vertical or horizontal intra prediction mode. Both the encoder and decoder follow the same MPM set construction process. Hence, no additional syntax elements are needed to signal the neighbor blocks and the search order.
    Type: Grant
    Filed: April 26, 2018
    Date of Patent: October 5, 2021
    Assignee: InterDigital VC Holdings, Inc.
    Inventors: Gagan Rath, Fabien Racape, Tangi Poirier, Fabrice Leleannec