公开(公告)号：US12244831B2

公开(公告)日：2025-03-04

申请号：US18637693

申请日：2024-04-17

Applicant: InterDigital VC Holdings, Inc.

Inventor： Edouard Francois ,  Fabrice Leleannec ,  Tangi Poirier

IPC: H04N19/186 ,  H04N19/119 ,  H04N19/176

Abstract: A cross-component dependent tool to be used for a chroma block of a picture is enabled responsive to a size of said chroma block and to a size of at least one luma block co-located with the chroma block. Then, the chroma block is decoded responsive to said enablement of said cross-component dependent tool. A encoding and decoding methods are presented as well as encoding and decoding devices.

公开(公告)号：US12184834B2

公开(公告)日：2024-12-31

申请号：US17290661

申请日：2019-11-15

Applicant: InterDigital VC Holdings, Inc.

Inventor： Philippe Bordes ,  Tangi Poirier ,  Ya Chen

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/577

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.

公开(公告)号：US20240251078A1

公开(公告)日：2024-07-25

申请号：US18422695

申请日：2024-01-25

Applicant: InterDigital VC Holdings, Inc.

Inventor： Fabrice Leleannec ,  Franck Galpin ,  Tangi Poirier

IPC: H04N19/119 ,  H04N19/124 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18 ,  H04N19/91

CPC classification number: H04N19/119 ,  H04N19/124 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18 ,  H04N19/91

Abstract: Different implementations are described, particularly implementations for video encoding and decoding based on asymmetric binary partitioning of image blocks are presented. The encoding method comprises for a picture, wherein at least one component of the picture is divided into blocks of samples, partitioning a block into block partitions, wherein at least one block partition has a size equal to a positive integer different from a power of 2 in width and/or height, generating a residual by predicting the block partitions and subtracting the prediction from the block partitions, splitting the generated residual into at least two residual blocks with a size equal to a power of 2 in width and height and transforming the at least two residual blocks into transform coefficients, quantizing the transform coefficients, and entropy coding of the quantized transform coefficients. Correspondingly, the decoding method comprises receiving in a bitstream quantized transform coefficients, entropy decoding, de-quantizing and inverse transforming the transform coefficients to obtain residual blocks with a size equal to a power of 2 in width and height, merging at least two residual blocks to reconstruct a residual for a block partition having a size equal to a positive integer different from a power of 2 in width and/or height and reconstructing a block of the picture by predicting the block partitions and combining the residuals with the predicted block partitions. Ohers embodiments are presented for a block partitioning on the border of the picture and for setting maximum and/or minimum block sizes.

公开(公告)号：US11962807B2

公开(公告)日：2024-04-16

申请号：US17431819

申请日：2020-03-05

Applicant: InterDigital VC Holdings, Inc.

Inventor： Ya Chen ,  Fabrice Leleannec ,  Tangi Poirier

IPC: H04N19/70 ,  H04N9/46 ,  H04N19/13 ,  H04N19/176 ,  H04N19/46

CPC classification number: H04N19/70 ,  H04N19/13 ,  H04N19/176 ,  H04N19/46

Abstract: Encoding or decoding syntax information associated with video information can involve identifying a coding context associated with a syntax element of a current coding unit of the video information, wherein the identifying occurs without using a syntax element of a neighboring block, and encoding or decoding the syntax element of the current coding unit based on the coding context.

公开(公告)号：US11863739B2

公开(公告)日：2024-01-02

申请号：US17838693

申请日：2022-06-13

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Fabien Racape ,  Franck Galpin ,  Tangi Poirier

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

CPC classification number: H04N19/105 ,  H04N19/11 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/182 ,  H04N19/593

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：US20230412810A1

公开(公告)日：2023-12-21

申请号：US18229987

申请日：2023-08-03

Applicant: InterDigital VC Holdings, Inc.

Inventor： Fabrice Le Leannec ,  Tangi Poirier ,  Gagan Bihari Rath ,  Fabrice Urban

IPC: H04N19/129 ,  H04N19/119 ,  H04N19/593 ,  H04N19/159 ,  H04N19/176

CPC classification number: H04N19/129 ,  H04N19/119 ,  H04N19/176 ,  H04N19/159 ,  H04N19/593

Abstract: Video encoding and decoding using non-rectangular partitioning. An example video decoding method includes: obtaining information identifying a non-rectangular first partitioning of a current block into a plurality of prediction units; determining a second partitioning of the current block into a plurality of transform units, wherein each transform unit is completely spatially contained within a respective one of the prediction units; and decoding the current block according to the non-rectangular first partitioning and the second partitioning. In some embodiments, the scan order of the transform units is determined such that all transform units contained in a same one of the prediction units are scanned before starting to scan transform units that are contained in a different one of the prediction units.

公开(公告)号：US20230291922A1

公开(公告)日：2023-09-14

申请号：US18198886

申请日：2023-05-18

Applicant: InterDigital VC Holdings, Inc.

Inventor： Fabrice Leleannec ,  Tangi Poirier ,  Ya Chen

IPC: H04N19/44 ,  H04N19/60 ,  H04N19/70 ,  H04N19/176

CPC classification number: H04N19/44 ,  H04N19/176 ,  H04N19/60 ,  H04N19/70

Abstract: A decoding method is disclosed. First, context for a syntax clement associated with a current transform coefficient of a block of a picture is determined. The context is determined based on the area of said block, on the position of the current transform coefficient within the block and on the number of non-zero neighboring transform coefficients in a local template. Second, the syntax element is decoded based at least on the determined context. Advantageously, the local template depends on the shape of said block.

公开(公告)号：US11558604B2

公开(公告)日：2023-01-17

申请号：US16979830

申请日：2019-04-08

Applicant: InterDigital VC Holdings, Inc.

Inventor： Gagan Bihari Rath ,  Tangi Poirier ,  Fabrice Urban

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

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：US11483559B2

公开(公告)日：2022-10-25

申请号：US17056971

申请日：2019-05-21

Applicant: InterDigital VC Holdings, Inc.

Inventor： Fabrice Leleannec ,  Franck Galpin ,  Tangi Poirier ,  Gagan Rath

IPC: H04N19/119 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/46 ,  H04N19/88

Abstract: Different implementations are described, particularly implementations for video encoding and decoding based on wherein the partitioning tree structure is partially shared between luma and chroma blocks are presented. According to an implementation, a single partitioning tree structure is shared between luma and chroma blocks from a root node of the partitioning tree down to a switching node and a dual partitioning tree structure is determined for luma and chroma blocks from the switching node down to a leaf node of the partitioning tree. Thus, this implementation optimizes the coding efficiency by allowing separated trees for smaller blocks, while limiting the complexity of decoding pipeline.

公开(公告)号：US20220312040A1

公开(公告)日：2022-09-29

申请号：US17615499

申请日：2020-05-28

Applicant: InterDigital VC Holdings, Inc.

Inventor： Karam Naser ,  Fabrice LeLeannec ,  Tangi Poirier

IPC: H04N19/70 ,  H04N19/46 ,  H04N19/103 ,  H04N19/176

Abstract: A method and apparatus to improve compression efficiency in a video compression scheme enables use of new tools with multiple transform selection. In one embodiment, transform pair selection is based on a flag indicative of low-frequency non-separable transforms. In another embodiment, transform pair selection is based on a flag indicative of low-frequency non-separable transforms and on a flag indicative of matrix-based intra prediction. In another embodiment, when an implicit multiple transform selection mode is used, transform pair selection is based on a flag indicative of low-frequency non-separable transforms. Bitstream syntax is used to convey the flags.