公开(公告)号：US11947116B2

公开(公告)日：2024-04-02

申请号：US17440911

申请日：2020-03-18

Applicant: InterDigital VC Holdings, Inc.

Inventor： Pierre Andrivon ,  Franck Galpin ,  Fabrice Urban

IPC: G02B27/01

CPC classification number: G02B27/0172 ,  G02B2027/011 ,  G02B2027/0123 ,  G02B2027/014

Abstract: A method and an apparatus are defined for displaying images on a flexible display in a head-mountable device (HMD). One or more flexible display devices may be inserted in the HMD. The one or more flexible display devices may be constrained by the HMD to take a particular curved form and wrap the field of view (FOV) of images displayed on the one or more flexible display devices for an improved user experience. The display surface of the one or more flexible displays may be divided in display areas, the display areas corresponding to a focus area and a peripheral FOV. Image processing may be differentiated according to display area.

公开(公告)号：US11909974B2

公开(公告)日：2024-02-20

申请号：US17043280

申请日：2019-03-27

Applicant: InterDigital VC Holdings, Inc.

Inventor： Fabrice Leleannec ,  Franck Galpin ,  Tangi Poirier ,  Edouard Francois

IPC: H04N19/124 ,  H04N19/176 ,  H04N19/186 ,  H04N19/51 ,  H04N19/70

CPC classification number: H04N19/124 ,  H04N19/176 ,  H04N19/186 ,  H04N19/51 ,  H04N19/70

Abstract: A video coding system uses a value of a chroma quantization parameter table to quantize or de-quantize chroma values of a block of the video, the chroma quantization parameter table being directly coded in a set of parameters at the picture level or at the sequence level of the coded video stream. A corresponding encoding method, encoding device, decoding method, decoding device, and non-transitory readable medium are proposed.

公开(公告)号：US11750836B2

公开(公告)日：2023-09-05

申请号：US17275351

申请日：2019-09-12

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Franck Galpin ,  Antoine Robert ,  Fabrice Leleannec

IPC: H04N19/52 ,  H04N19/105 ,  H04N19/139 ,  H04N19/176 ,  H04N19/46

CPC classification number: H04N19/52 ,  H04N19/105 ,  H04N19/139 ,  H04N19/176 ,  H04N19/46

Abstract: Methods and apparatus for creating additional affine candidates. Virtual and temporal candidates are determined using neighboring spatial and temporal sub-blocks. The sub-blocks are examined in an order known to both an encoder and a decoder. Valid sub-blocks are used to compute an affine model. The candidates can be filtered and added to a candidate list conditionally based on various criteria. The candidates can be used to determine control point motion vectors and a motion flow field can be determined. Motion vectors for sub-blocks within a video coding block can be determined. Motion compensation can be performed using the improved affine candidates and encoding/decoding based on the improved affine motion compensation.

公开(公告)号：US11722694B2

公开(公告)日：2023-08-08

申请号：US16963451

申请日：2019-01-25

Applicant: InterDigital VC Holdings, Inc.

Inventor： Franck Galpin ,  Tangi Poirier ,  Philippe Bordes ,  Fabrice Leleannec ,  Fabien Racape

IPC: H04N19/593 ,  H04N19/147 ,  H04N19/176 ,  H04N19/186

CPC classification number: H04N19/593 ,  H04N19/147 ,  H04N19/176 ,  H04N19/186

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, at least one spatial neighboring template is determined and at least one linear model parameter is determined based on reconstructed samples of the at least one spatial neighboring template. In a first embodiment, the number N of reconstructed samples corresponds to N=2k with k chosen so that n is the maxim integer smaller than sum of the block width and block height. In a second embodiment, the an offset for the relative position of a first sample in the template among samples of a left, respectively top, neighboring line of the block is determined. In a third embodiment, the number of reconstructed samples is set to a higher number in the larger dimension of the block.

公开(公告)号：US11477436B2

公开(公告)日：2022-10-18

申请号：US17049724

申请日：2019-04-03

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Franck Galpin ,  Fabien Racape ,  Philippe Bordes ,  Fabrice Urban

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/70

Abstract: Encoders and decoders of digital video signals use combined intra prediction modes for some images. In at least one embodiment, combined intra prediction modes can result from the intra prediction modes of neighboring blocks. The combined intra prediction mode can be added to a most probable modes list. Various embodiments describe techniques for combining the intra prediction modes, comprising a combination of reference samples and a combination of directions to form a prediction. Another embodiment adds a combination mode to the most probable modes list if the two modes that are combined to form it are directional modes with angle difference less than 90 degrees. Another embodiment uses a linear combination of intra prediction modes and another embodiment performs a linear combination which depends on the distance of a prediction from the left and above blocs.

公开(公告)号：US11438587B2

公开(公告)日：2022-09-06

申请号：US16772037

申请日：2018-11-07

Applicant: interDigital VC Holdings, Inc.

Inventor： Fabrice Leleannec ,  Franck Galpin ,  Fabien Racape ,  Sunil Jaiswal

IPC: H04N19/119 ,  H04N19/102 ,  H04N19/147 ,  H04N19/176 ,  H04N19/70 ,  H04N19/96

Abstract: A method for encoding a block is disclosed. To this aim, a split mode is determined based on a rate-distortion optimization using a texture-based split prediction set obtained for the block. As an example, the split mode is determined by adapting the texture-based split prediction set according to at least one of a binary or triple split mode non-redundancy constraint or a heuristic-based split mode set pruning. The block is finally encoded using the determined split mode.

公开(公告)号：US20220256161A1

公开(公告)日：2022-08-11

申请号：US17627377

申请日：2020-07-01

Applicant: InterDigital VC Holdings, Inc.

Inventor： Franck Galpin ,  Fabien Racape ,  Jean Begaint ,  Swayambhoo Jain ,  Shahab Hamidi-Rad

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/70

Abstract: Different implementations are described, particularly implementations for video encoding and decoding based on linear weighted intra prediction, also called matrix based intra prediction, are presented. Accordingly, for a block being encoded or decoded in linear weighted intra prediction, obtaining intra predicted samples from at least two matrix-vector products between at least two selected weight matrices of reduced size and a set of neighboring reference samples. Advantageously, such arrangement allows to reduce the amount of memory for storing data and to reduce the complexity of the intra prediction samples computation.

公开(公告)号：US11412220B2

公开(公告)日：2022-08-09

申请号：US16771094

申请日：2018-12-12

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Fabrice Le Leannec ,  Franck Galpin ,  Fabien Racape ,  Sunil Jaiswal

IPC: H04N19/119 ,  H04N19/14 ,  H04N19/176 ,  H04N19/146

Abstract: A block of video data is split using one or more of several possible partition operations by using the partitioning choices obtained through use of a texture-based image partitioning. In at least one embodiment, the block is split in one or more splitting operations using a convolutional neural network. In another embodiment, inputs to the convolutional neural network come from pixels along the block's causal borders. In another embodiment, boundary information, such as the location of partitions in spatially neighboring blocks, is used by the texture analysis. Methods, apparatus, and signal embodiments are provided for encoding.

公开(公告)号：US20220174306A1

公开(公告)日：2022-06-02

申请号：US17548197

申请日：2021-12-10

Applicant: InterDigital VC Holdings, Inc.

Inventor： Antoine Robert ,  Fabrice Leleannec ,  Franck Galpin

IPC: H04N19/503 ,  H04N19/105 ,  H04N19/176 ,  H04N19/189

Abstract: A decoding method is disclosed. A flag is first decoded. The flag indicates whether a current block of a picture is decoded with a tool of a set of tools. The set of tools comprises tools using reconstructed samples of neighboring blocks decoded prior to the current block or using a block of the picture larger than a hardware unit. The flag is only decoded in the case where the current block has a parent hardware unit. A current block is then decoded responsive to the flag.

公开(公告)号：US11212532B2

公开(公告)日：2021-12-28

申请号：US16475331

申请日：2017-12-26

Applicant: InterDigital VC Holdings, Inc.

Inventor： Antoine Robert ,  Fabrice Leleannec ,  Franck Galpin

IPC: H04N19/139 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/573

Abstract: A Frame Rate Up-Conversion (FRUC) derivation process, based on frame rate up-conversion techniques, is developed in the reference software JEM (Joint Exploration Model) by the Joint Video Exploration Team (JVET). In one embodiment, a modified FRUC derivation process improves the performances of the current FRUC tool is provided. For example, some candidates of a bi-predictive pair may be discarded initially, which would save signification processing time. The discarding decision may depend on various criteria such as, e.g., a ratio between matching costs of a bi-predictive pair from two reference picture lists, a difference between the matching costs of a bi-predictive pair normalized by their respective template areas.