公开(公告)号：WO2020251660A1

公开(公告)日：2020-12-17

申请号：PCT/US2020/029734

申请日：2020-04-24

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： BORDES, Philippe ,  CHEN, Ya ,  URBAN, Fabrice

IPC: H04N19/46

Abstract: Methods (800, 1600, 1700) and apparatuses (1800) for video coding and decoding are provided. The method (800, 1600, 1700) includes deriving one or more illumination compensation parameters based on neighboring samples of a sub-block of a block and neighboring samples of a motion- compensated reference sub-block; deriving a prediction sub-block by applying on the motion-compensated reference sub-block an illumination compensation using the one or more derived illumination compensation parameters. A computer-readable storage medium and a computer program product are also described.

公开(公告)号：WO2020185723A1

公开(公告)日：2020-09-17

申请号：PCT/US2020/021788

申请日：2020-03-10

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： RACAPE, Fabien ,  RATH, Gagan ,  URBAN, Fabrice

IPC: H04N19/11 ,  H04N19/105 ,  H04N19/119 ,  H04N19/176 ,  H04N19/593 ,  H04N19/70

Abstract: A method and apparatus for performing intra prediction mode partitioning predicts pixels of a video coding block using a plurality of intra prediction modes over a plurality of regions of the video coding block. Predictions can be based on reference arrays using at least one reference line above the block to be coded and/or using at least one reference column to the left of the block to be coded. Different prediction modes are used in different regions of the coding block. In at least one embodiment, the video coding block is split into a plurality of partitions in addition to having a plurality of intra prediction modes over different regions of the block. Signaling enables a decoder to determine the number of regions within a coding block. In at least another embodiment, prediction modes allowable within regions of a video coding block differ by one angular position.

公开(公告)号：WO2020102000A1

公开(公告)日：2020-05-22

申请号：PCT/US2019/060266

申请日：2019-11-07

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： RATH, Gagan ,  RACAPE, Fabien ,  URBAN, Fabrice

IPC: H04N19/11 ,  H04N19/593

Abstract: At least a method and an apparatus are provided for efficiently encoding or decoding video. For example, a most probable mode (MPM) list comprising a number of intra prediction mode candidates for a current block is obtained depending on a shape of the current block. The current block is then encoded or decoded based on the obtained most probable mode list.

公开(公告)号：WO2020086248A1

公开(公告)日：2020-04-30

申请号：PCT/US2019/054937

申请日：2019-10-07

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： URBAN, Fabrice ,  RACAPE, Fabien ,  RATH, Gagan

IPC: H04N19/593 ,  H04N19/105 ,  H04N19/11 ,  H04N19/167 ,  H04N19/176

Abstract: A decoding method is disclosed. A current block is first intra predicted to obtain a prediction block. The current block is then decoded using the prediction block. At least one sample of the prediction block is obtained by a linear combination of reference samples, wherein one reference sample is padded. In this case, a weight associated with the padded reference sample decreases as a function of a distance between the padded reference sample and a last available reference sample.

公开(公告)号：WO2019245650A1

公开(公告)日：2019-12-26

申请号：PCT/US2019/029724

申请日：2019-04-29

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： RACAPE, Fabien ,  RATH, Gagan ,  URBAN, Fabrice

IPC: H04N19/105 ,  H04N19/593 ,  H04N19/117

Abstract: When a block is intra predicted, the predicted samples on the boundary are subject to boundary filtering for certain modes. Various embodiments are proposed to perform boundary filtering for intra prediction in the DC or PLANAR mode, using a gradient based approach. The gradient for a particular reference sample is calculated based on a difference between the particular reference sample and a predictor for predicting the particular reference sample. For the PLANAR mode, the difference between a top (left) reference sample and a linear interpolation using the top (left) reference samples is used as the gradient, a fractional part of which is propagated to the initial predicted samples with a decay function. For the DC mode, the difference between a top (left) reference sample and an average of reference samples is used as the gradient. The average can be computed with the top reference samples and/or left reference samples.

公开(公告)号：WO2019209477A1

公开(公告)日：2019-10-31

申请号：PCT/US2019/025479

申请日：2019-04-03

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： GALPIN, Franck ,  RACAPE, Fabien ,  BORDES, Philippe ,  URBAN, Fabrice

IPC: H04N19/593 ,  H04N19/11

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：WO2020263799A1

公开(公告)日：2020-12-30

申请号：PCT/US2020/039088

申请日：2020-06-23

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： NASAR, Karam ,  LELEANNEC, Fabrice ,  KERDRANVAT, Michel ,  POIRIER, Tangi ,  URBAN, Fabrice

IPC: H04N19/12 ,  H04N19/46 ,  H04N19/625 ,  H04N19/159 ,  H04N19/70

Abstract: Different implementations are described, particularly implementations for video encoding and decoding are presented. Accordingly, the encoding or decoding comprises obtaining at least one syntax element related to enabling multiple transform selection MTS and, based on the at least one syntax element, obtaining a horizontal transform or a vertical transform used in a transform method to apply to a block of residue. According to a particular characteristic, in an Intra Sub Partitioning ISP or a Sub Block Transform SBT, the horizontal transform and vertical transform of a transform method are set to the core transform DCT2 in case said at least one syntax element disables the multiple transform selection. According to another embodiment, the controlling of the use of non-separable secondary transform is also described.

公开(公告)号：WO2020197878A1

公开(公告)日：2020-10-01

申请号：PCT/US2020/023304

申请日：2020-03-18

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： ANDRIVON, Pierre ,  GALPIN, Franck ,  URBAN, Fabrice

IPC: G02B27/01

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：WO2020163209A1

公开(公告)日：2020-08-13

申请号：PCT/US2020/016345

申请日：2020-02-03

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： BORDES, Philippe ,  LELEANNEC, Fabrice ,  POIRIER, Tangi ,  URBAN, Fabrice

IPC: H04N19/117 ,  H04N19/14 ,  H04N19/176 ,  H04N19/82 ,  H04N19/86

Abstract: A method for reconstructing a picture block is disclosed, wherein the block is predicted using local illumination compensation. The parameters of local illumination compensation are determined according to a selection of reconstructed samples located to the left and above of the current block. In the case where some of them are unavailable, they may be replaced using different techniques.

公开(公告)号：WO2020092535A1

公开(公告)日：2020-05-07

申请号：PCT/US2019/058828

申请日：2019-10-30

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： URBAN, Fabrice ,  RACAPE, Fabien ,  RATH, Gagan

IPC: H04N19/105 ,  H04N19/11 ,  H04N19/176 ,  H04N19/593 ,  H04N19/91

Abstract: At least a method and an apparatus are provided for efficiently encoding or decoding video. For example, multiple reference lines for intra prediction of a current block are obtained, wherein the multiple reference lines include at least one reference line that is immediately adjacent to the current block and at least one reference line that is not immediately adjacent to the current block. A number of intra prediction candidate modes are obtained respectively for each of the multiple reference lines. The current block is encoded based on the respective number of candidate modes for each of the multiple reference lines.