公开(公告)号：US11490112B2

公开(公告)日：2022-11-01

申请号：US17276819

申请日：2019-11-25

Applicant: InterDigital VC Holdings, Inc.

Inventor： Fabrice LeLeannec ,  Antoine Robert ,  Tangi Poirier

IPC: H04N19/172 ,  H04N19/176 ,  H04N19/517

Abstract: Different implementations are described; particularly implementations for video encoding and decoding using merge lists comprising history-based motion vector predictor candidates and averaged motion vector predictor candidates. The method comprises: determining for a current block of the picture one or more history-based motion vector predictor candidates using motion information of blocks preceding the current block; determining for the current block one or more averaged motion vector predictor candidates by averaging a pair of motion vector predictor candidates in a list of motion vector predictor candidates, wherein the motion vector predictor candidates in the list are formed using motion information of blocks spatially and/or temporally surrounding the current block; and inserting one or more of the averaged motion vector predictor candidates before one or more of the history-based motion vector predictor candidates in the list of motion vector predictor candidates.

公开(公告)号：US11490104B2

公开(公告)日：2022-11-01

申请号：US16311414

申请日：2017-06-27

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Sebastien Lasserre ,  Pierre Andrivon ,  Philippe Bordes

IPC: H04N19/129 ,  H04N19/64 ,  H04N19/46 ,  G06F17/18

Abstract: Significance flags in advanced video compression systems are coded using contexts adaptive to the last N significance flags coded taken in a scanning order. One embodiment uses the last N significance flags in scanning order as a predictor to determine which of a plurality of sets of significance flag contexts to use for coding subsequent significance flags. A second embodiment uses the last N significance flags in scanning order as a predictor in order to modulate the probability value associated with significance flag contexts that are used to code significance flags for future coding.

公开(公告)号：US11463712B2

公开(公告)日：2022-10-04

申请号：US17276669

申请日：2019-11-20

Applicant: InterDigital VC Holdings, Inc.

Inventor： Fabrice Leleannec ,  Ya Chen ,  Philippe Bordes

IPC: H04N19/18 ,  H04N19/124 ,  H04N19/13 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70

Abstract: Different implementations are described, particularly implementations for video encoding and decoding using entropy coding of quantized transform coefficients. The method comprises: determining context model indices for one or more syntax elements of quantized transform coefficients of a transform block, wherein different context model indices are obtained for quantized transform coefficients in different regions of the transform block and a single context index is used for at least one region of the transform block; and selecting for the one or more syntax elements associated with a particular quantized transform coefficient one of several context models based on the determined content model index.

公开(公告)号：US20220256134A1

公开(公告)日：2022-08-11

申请号：US17629242

申请日：2020-07-14

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Bertrand Chupeau ,  Gérard Briand ,  Renaud Dore

IPC: H04N13/178 ,  H04N13/194 ,  H04N13/161

Abstract: Methods, devices and data stream are provided for signaling and decoding information representative of restrictions of navigation in a volumetric video. The data stream comprises metadata associated to video data representative of the volumetric video. The metadata comprise data representative of a viewing bounding box, data representative of a curvilinear path in the 3D space of said volumetric video; and data representative of at least one viewing direction range associated with a point on the curvilinear path.

公开(公告)号：US20220207364A1

公开(公告)日：2022-06-30

申请号：US17606025

申请日：2020-04-20

Applicant: InterDigital VC Holdings, Inc.

Inventor： Fabien RACAPE ,  Swayambhoo JAIN ,  Shahab HAMIDI-RAD

IPC: G06N3/08 ,  H04N19/70 ,  G06N5/04

Abstract: A method and apparatus for conveying information in a bitstream for deep neural network compression, such as in matrices representing weights, biases and non-linearities, to iteratively compress a pre-trained deep neural network by low displacement rank based approximation of the network layer weight matrices. The low displacement rank approximation allows for replacement of an original layer weight matrices of the pre-trained deep neural network as the sum of small number of structured matrices, allowing compression and low inference complexity. A decoder stage parses a bitstream for inference.

公开(公告)号：US11367247B2

公开(公告)日：2022-06-21

申请号：US16766355

申请日：2018-11-06

Applicant: InterDigital VC Holdings, Inc.

Inventor： Franck Thudor ,  Bertrand Chupeau ,  Renaud Dore ,  Thierry Tapie ,  Julien Fleureau

IPC: G06T15/08 ,  G06T7/73 ,  G06T17/10 ,  G06T15/04 ,  H04N19/597

Abstract: Encoding/decoding data representative of a 3D representation of a scene according to a range of points of view can involve generating a depth map associated with a part of the 3D representation according to a parameter representative of a two-dimensional parameterization associated with the part and data associated with a point included in the part, wherein the two-dimensional parameterization can be responsive to geometric information associated with the point and to pose information associated with the range of points of view. A texture map associated with the part can be generated according to the parameter and data associated with the point. First information representative of point density of points in a part of the part can be obtained. The depth map, texture map, parameter, and first information can be included in respective syntax elements of a bitstream.

公开(公告)号：US11363254B2

公开(公告)日：2022-06-14

申请号：US17015456

申请日：2020-09-09

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Fabien Racape ,  Franck Galpin ,  Tangi Poirier

IPC: H04N19/11 ,  H04N19/159 ,  H04N19/176 ,  H04N19/105 ,  H04N19/132 ,  H04N19/593 ,  H04N19/182

Abstract: The method for intra frame prediction allows for the recovery of some intra directional modes that are otherwise rendered useless due to the classical padding process. Directional modes are recovered by filling pixel locations in the prediction unit with samples from the portion of the unit that is determined to have samples available for use using a counterpart directional mode to the one that is useless. When it is determined that reference samples are missing for a particular prediction unit or portion thereof given a particular directional mode, a determination is made about whether reference samples along another portion of the prediction unit are available. The other portion is the side of the prediction unit at an opposite end of the particular directional mode. When it is determined that such reference samples are available, it is possible to extend the number of intra directional modes by replacing the particular directional modes that are rendered useless, because of the unavailability of reference samples, with their counterpart directional modes that are oppositely directed.

公开(公告)号：US11348260B2

公开(公告)日：2022-05-31

申请号：US16624639

申请日：2018-06-18

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Kangying Cai ,  Sebastien Lasserre

IPC: G06T7/50 ,  G06T7/10 ,  G06T9/00 ,  G06T11/00 ,  G06T17/20

Abstract: This method for encoding a 3D point cloud comprises: —segmenting the point cloud into first patches (2); —determining inverse projection parameters of the patches (4); —projecting the first patches to planes using the inverse projection parameters (10); —encoding the planes (12); —determining sparse points in the point cloud not belonging to any patch (HC, 18); and—encoding the sparse points using an octree-decomposition (20).

公开(公告)号：US20220159277A1

公开(公告)日：2022-05-19

申请号：US17437506

申请日：2020-03-05

Applicant: InterDigital VC Holdings, Inc.

Inventor： Fabrice URBAN ,  Tangi POIRIER ,  Philippe BORDES

IPC: H04N19/196 ,  H04N19/132 ,  H04N19/105 ,  H04N19/176

Abstract: Different implementations are described, particularly implementations for video encoding and decoding based on a linear model responsive to neighboring samples are presented. Accordingly, for a block being encoded or decoded in a picture, refined linear model parameters are determined for a current subblock in the block and for encoding the block, the local illumination compensation uses a linear model for the current subblock based on the refined linear model parameters. In a first embodiment, the number N of reconstructed samples increases with the available data for the subblock. In a second embodiment, partial linear model parameters are determined for the subblock and refined linear model parameters are derived from a weighted sums of partial linear model parameters. In a third embodiment, the subblocks are independently LIC processed.

公开(公告)号：US20220159265A1

公开(公告)日：2022-05-19

申请号：US17438836

申请日：2020-03-12

Applicant: InterDigital VC Holdings, Inc.

Inventor： Franck GALPIN ,  Fabrice LELEANNEC ,  Edouard FRANCOIS

IPC: H04N19/137 ,  H04N19/105 ,  H04N19/30 ,  H04N19/176

Abstract: A method for obtaining a temporal motion vector predictor is disclosed. A new temporal motion vector predictor is obtained by using a motion vector of a block in a collocated image. The block is displaced (with respect spatial location of the current block) by a motion vector coming from a new temporal motion vector predictor (TMVP) process.