公开(公告)号：US20240007665A1

公开(公告)日：2024-01-04

申请号：US18368247

申请日：2023-09-14

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Franck Galpin ,  Antoine Robert ,  Fabrice Urban

IPC: H04N19/52 ,  H04N19/176 ,  H04N19/184

CPC classification number: H04N19/52 ,  H04N19/184 ,  H04N19/176

Abstract: A method of predicting or inferring a piece of information for encoding or decoding uses a predictor from a spatial neighbor, or from a reference picture, instead of predicting or inferring the information, such as a flag for a current block, from a motion predictor block. This procedure can be used in several ways, or used in various motion vector prediction modes, such as Frame Rate Up Conversion or various variations of Advanced Motion Prediction. Other embodiments provide other methods and combinations to derive or infer motion information to increase coding efficiency.

公开(公告)号：US11812060B2

公开(公告)日：2023-11-07

申请号：US16301321

申请日：2017-04-24

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Tangi Poirier ,  Fabrice Leleannec ,  Fabrice Urban

IPC: H04N19/86 ,  H04N5/232 ,  G06K9/38 ,  G06K9/00 ,  H04N19/63 ,  H04N19/593 ,  H04N19/82 ,  G06T7/254 ,  G06V20/40 ,  H04N23/61 ,  H04N19/176

CPC classification number: H04N19/63 ,  G06T7/254 ,  G06V20/40 ,  H04N19/176 ,  H04N19/593 ,  H04N19/82 ,  H04N19/86 ,  H04N19/865 ,  H04N23/61

Abstract: A decoding method is disclosed that comprises: —decoding (S120) a block of a picture, said block being intra predicted from a plurality of reference blocks; —determining (S130) a frontier inside the decoded block based on a frontier existing between said plurality of reference blocks; and —filtering (S140) with a de-artifacting filter along the frontier determined inside the decoded block.

公开(公告)号：US11805271B2

公开(公告)日：2023-10-31

申请号：US16652813

申请日：2018-10-04

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Franck Galpin ,  Antoine Robert ,  Fabrice Urban

IPC: H04N19/52 ,  H04N19/176 ,  H04N19/184

CPC classification number: H04N19/52 ,  H04N19/176 ,  H04N19/184

Abstract: A method of predicting or inferring a piece of information for encoding or decoding uses a predictor from a spatial neighbor, or from a reference picture, instead of predicting or inferring the information, such as a flag for a current block, from a motion predictor block. This procedure can be used in several ways, or used in various motion vector prediction modes, such as Frame Rate Up Conversion or various variations of Advanced Motion Prediction. Other embodiments provide other methods and combinations to derive or infer motion information to increase coding efficiency.

公开(公告)号：US11665347B2

公开(公告)日：2023-05-30

申请号：US17378649

申请日：2021-07-16

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Fabrice Urban ,  Tangi Poirier ,  Fabrice Leleannec

IPC: H04N11/02 ,  H04N19/12 ,  H04N19/105 ,  H04N19/176 ,  H04N19/60

CPC classification number: H04N19/12 ,  H04N19/105 ,  H04N19/176 ,  H04N19/60

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.

公开(公告)号：US11381811B2

公开(公告)日：2022-07-05

申请号：US16649620

申请日：2018-11-20

Applicant: InterDigital VC Holdings, Inc.

Inventor： Gagan Bihari Rath ,  Fabrice Leleannec ,  Fabien Racape ,  Fabrice Urban

IPC: H04N19/11 ,  H04N19/105 ,  H04N19/159

Abstract: At least one of the present embodiments generally relates to a method and an apparatus for video encoding and decoding, and more particularly, to a method and an apparatus for low-complexity bi-directional intra prediction. For example, a subset of a plurality of directional intra prediction modes is selected based on a shape of a current block of a picture being encoded or decoded. For a selected intra prediction mode in this subset, a sample value is bi-directionally intra predicted by using two predictors. The two predictors are substantially on a line based on a direction corresponding to the selected directional intra prediction mode. The bi-directional intra prediction may be only applied to large luma blocks, but not chroma blocks in order to reduce the computational complexity. When bi-directional intra prediction is used, the smoothing filtering may be omitted in intra prediction to further reduce the complexity.

公开(公告)号：US20210377516A1

公开(公告)日：2021-12-02

申请号：US16979830

申请日：2019-04-08

Applicant: InterDigital VC Holdings, Inc.

Inventor： Gagan RATH ,  Tangi Poirier ,  Fabrice Urban

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/117 ,  H04N19/82 ,  H04N19/176

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.

公开(公告)号：US20200351506A1

公开(公告)日：2020-11-05

申请号：US16957082

申请日：2019-02-25

Applicant: InterDigital VC Holdings, Inc.

Inventor： Gagan Bihari Rath ,  Fabien Racape ,  Fabrice Urban

IPC: H04N19/159 ,  H04N19/105 ,  H04N19/176 ,  H04N19/167

Abstract: After initial intra prediction based on projection along an intra prediction direction, there may exist discontinuities between the predicted block and neighboring blocks. To smooth the block boundary, boundary filtering may be used with intra prediction. In particular, different methods may be used for boundary filtering. The particular filtering method to be used may be selected adaptively based on the intra prediction mode. When gradient-based filtering is selected, the gradient at a reference sample, that is at the same row or column as the current sample, in a reference layer is calculated as the difference between the reference sample and the predicted value for the reference sample using the intra prediction mode. Additional gradient at another reference sample from another reference layer may also be used. Then the initially predicted value for the sample may be adjusted based on the gradient(s) and a decay function.