公开(公告)号：US12075051B2

公开(公告)日：2024-08-27

申请号：US18236101

申请日：2023-08-21

Applicant: InterDigital VC Holdings, Inc.

Inventor： Ya Chen ,  Fabrice Leleannec ,  Tangi Poirier ,  Philippe De Lagrange

IPC: H04N19/124 ,  H04N19/176 ,  H04N19/18 ,  H04N19/42 ,  H04N19/46 ,  H04N19/48 ,  H04N19/70 ,  H04N19/91

CPC classification number: H04N19/124 ,  H04N19/176 ,  H04N19/18 ,  H04N19/91 ,  H04N19/42 ,  H04N19/46 ,  H04N19/48 ,  H04N19/70

Abstract: When dependent scalar quantization is used, the choice of the quantizer depends on the decoding of the preceding transform coefficient, and the entropy decoding of a transform coefficient depends on quantizer choice. To maintain high throughput in hardware implementations for transform coefficient entropy coding, several decision schemes of the scaler quantizer are proposed. In one implementation, the state transition and the context model selection are based on only regular coded bins. For example, the state transition can be based on the sum of the SIG, gt1 and gt2 flags, the exclusive-or function of the SIG, gt1 and gt2 flags, or based on only the gt1 or gt2 flag. When a block of transform coefficients is coded, the regular mode bins can be coded first in one or more scan passes, and the remaining bypass coded bins are grouped together in another one or more scan passes.

公开(公告)号：US20240205461A1

公开(公告)日：2024-06-20

申请号：US18588944

申请日：2024-02-27

Applicant: InterDigital VC Holdings, Inc.

Inventor： Ya Chen ,  Fabrice Leleannec ,  Tangi Poirier

IPC: H04N19/70 ,  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：US11956430B2

公开(公告)日：2024-04-09

申请号：US17253692

申请日：2019-06-13

Applicant: InterDigital VC Holdings, Inc.

Inventor： Fabrice Leleannec ,  Franck Galpin ,  Tangi Poirier

IPC: H04N19/119 ,  H04N19/124 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18 ,  H04N19/66 ,  H04N19/91 ,  H04N19/96

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, obtaining a residual based on a difference between a prediction of the block partitions and the block partitions, splitting the residual into at least two residual blocks with a size equal to a power of 2 in width and height and encoding the at least two residual blocks. Ohers embodiments are presented for a block partitioning on the border of the picture, for setting maximum and/or minimum block sizes and for corresponding decoding method.

公开(公告)号：US20240089437A1

公开(公告)日：2024-03-14

申请号：US18512368

申请日：2023-11-17

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：US11917146B2

公开(公告)日：2024-02-27

申请号：US16498392

申请日：2018-03-13

Applicant: InterDigital VC Holdings, Inc.

Inventor： Tangi Poirier ,  Franck Galpin ,  Fabrice Leleannec

IPC: H04N19/119 ,  H04N19/167 ,  H04N19/176

CPC classification number: H04N19/119 ,  H04N19/167 ,  H04N19/176

Abstract: A decoding method is disclosed that comprises: determining whether a current block of a picture extends beyond a boundary of the picture; determining for each split mode of a plurality of split modes whether said current block is allowed to undergo splitting according to said split mode by checking whether at least one of the split line is co-located with one of the picture border or whether the size of the block part inside the picture along the picture boundary is a multiple of a minimum block size; decoding from a bitstream a current split mode of the current block responsive to the allowed split modes; and decoding the current block according to the current split mode.

公开(公告)号：US11902560B2

公开(公告)日：2024-02-13

申请号：US17051825

申请日：2019-05-07

Applicant: InterDigital VC Holdings, Inc.

Inventor： Ya Chen ,  Franck Galpin ,  Tangi Poirier

IPC: H04N19/513 ,  H04N19/132 ,  H04N19/149 ,  H04N19/176 ,  H04N19/46

CPC classification number: H04N19/513 ,  H04N19/132 ,  H04N19/149 ,  H04N19/176 ,  H04N19/46

Abstract: A video codec can involve processing video information based on a motion model involving a coding unit including a plurality of sub-blocks, such as an affine motion model, to produce motion compensation information, obtaining a local illumination compensation model, and encoding or decoding the video information based on the motion compensation information and the local illumination compensation model.

公开(公告)号：US11889117B2

公开(公告)日：2024-01-30

申请号：US17381283

申请日：2021-07-21

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Fabrice Leleannec ,  Franck Galpin ,  Tangi Poirier

IPC: H04N19/61 ,  H04N19/105 ,  H04N19/119 ,  H04N19/13 ,  H04N19/176

CPC classification number: H04N19/61 ,  H04N19/105 ,  H04N19/119 ,  H04N19/13 ,  H04N19/176

Abstract: A coding unit having a size multiple of three in horizontal or vertical direction is coded through one of several embodiments. In one embodiment, for some block sizes, the coding unit is coded and decoded systematically through SKIP mode. In another embodiment, the coding units can be coded in SKIP mode or with a DC coefficient. In another embodiment, an asymmetric division of a common coding unit parent is performed and transform coefficients are factorized among at least two sub-blocks to encode a coding unit. In another embodiment, a separable two dimensional transform can be applied by applying a transform over the block in one direction, and using two one- dimensional transforms on sub-blocks in the other direction to code. Methods, apparatus, and signal embodiments are provided for encoding and decoding.

公开(公告)号：US11876968B2

公开(公告)日：2024-01-16

申请号：US17295634

申请日：2019-12-02

Applicant: InterDigital VC Holdings, Inc.

Inventor： Ya Chen ,  Tangi Poirier ,  Karam Naser

IPC: H04N19/159 ,  H04N19/176 ,  H04N19/129 ,  H04N19/13 ,  H04N19/147 ,  H04N19/18

CPC classification number: H04N19/129 ,  H04N19/13 ,  H04N19/147 ,  H04N19/176 ,  H04N19/18

Abstract: An encoding method is presented. Transform coefficients of a block are first obtained. They are then scanned according to a scan pattern for entropy coding. The scan pattern is determined responsive to a shape of the block.
FIG. 5

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：US20230345043A1

公开(公告)日：2023-10-26

申请号：US18209087

申请日：2023-06-13

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: Implementations for video encoding and decoding based on a linear model responsive to neighboring samples are described. 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, 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.