公开(公告)号：US12212745B2

公开(公告)日：2025-01-28

申请号：US18094460

申请日：2023-01-09

Applicant: InterDigital VC Holdings, Inc.

Inventor： Philippe Bordes ,  Franck Galpin ,  Philippe De Lagrange

IPC: H04N7/12 ,  G06T9/00 ,  H04N19/105 ,  H04N19/117 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/189 ,  H04N19/635 ,  H04N19/82

Abstract: Different implementations are described, particularly implementations for video encoding and decoding are presented including a method for deblocking an image. According to an implementation, in a method for deblocking an image, at least one boundary is determined between a first block of samples and a second block of samples: a boundary strength is determined according to at least one of a prediction mode of the first block and a prediction mode of the second block; and samples of the first and second blocks neighboring the at least one boundary are filtered according to the boundary strength. Advantageously, in case the prediction mode of the first block is a weighted prediction mode, the boundary strength further depends on the relative weight of samples used in predicting the first block of samples according to the weighted prediction mode of the first block and reciprocally for the second block.

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：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：US20230095684A1

公开(公告)日：2023-03-30

申请号：US17608705

申请日：2020-04-29

Applicant: InterDigital VC Holdings, Inc.

Inventor： Philippe Bordes ,  Fabrice LeLeannec ,  Franck Galpin

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

Abstract: A coding tool set enablement scheme allows one or more coding tools to be used in the encoding or decoding of video data based on one or more characteristics related to the video. In one embodiment, some coding tools are enabled for block sizes below a particular threshold. In another embodiment, a group of coding tools are enabled based on one flag for blocks having a particular characteristic. In another embodiment, these flags are included in a bitstream with the video. In another embodiment, at least one of the flags are inferred to enable some coding tools.

公开(公告)号：US11563975B2

公开(公告)日：2023-01-24

申请号：US17284678

申请日：2019-12-16

Applicant: InterDigital VC Holdings, Inc.

Inventor： Fabrice Urban ,  Antoine Robert ,  Franck Galpin

IPC: H04N19/583 ,  H04N19/105 ,  H04N19/117 ,  H04N19/132 ,  H04N19/137 ,  H04N19/176 ,  H04N19/96 ,  H04N19/61 ,  G06T9/40 ,  H04N19/119 ,  H04N19/82

Abstract: At least a method and an apparatus are presented for efficiently encoding or decoding video. For example, a prediction block for a current block is obtained. A reconstructed neighboring block of the prediction block is obtained. Filtering is performed on a boundary between the prediction block and the reconstructed neighboring block. At the encoder side, the prediction residual is obtained as the difference between the filtered prediction block and the current block, and then encoded. At the decoder side, the prediction residual is added to the filtered prediction block to reconstruct the current block.

公开(公告)号：US20220353502A1

公开(公告)日：2022-11-03

申请号：US17860038

申请日：2022-07-07

Applicant: INTERDIGITAL VC HOLDINGS, INC.

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

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

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：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：US11375202B2

公开(公告)日：2022-06-28

申请号：US17277460

申请日：2019-09-04

Applicant: InterDigital VC Holdings, Inc.

Inventor： Franck Galpin ,  Tangi Poirier ,  Ya Chen

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

Abstract: At least a method and an apparatus are presented for efficiently encoding or decoding video. For example, one or more prediction models are determined respectively for one or more prediction candidates used for the video encoding based on one or more control point motion vectors of a current block of the video being encoded or decoded. It is determined from the one or more control point motion vectors that a first prediction model of the one or more prediction models may be a translational prediction model. It is also determined from the one or more control point motion vectors that a second prediction model of the one or more prediction models is to be an affine prediction model. The video is encoded or decoded based on a candidate list comprising the one or more prediction candidates determined respectively from the one or more prediction models.

公开(公告)号：US11245905B2

公开(公告)日：2022-02-08

申请号：US17040965

申请日：2019-04-29

Applicant: InterDigital VC Holdings, Inc.

Inventor： Fabrice Urban ,  Franck Galpin ,  Fabien Racape ,  Gagan Bihari Rath

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

Abstract: Methods and apparatuses for intra prediction in video encoding and decoding using a blended intra predictor are described. In one exemplary embodiment, intra prediction is preformed using a blended intra predictor for a pixel of a current block being encoded and decoded. The blended intra predictor is determined by summing with corresponding weights a predictor using the intra prediction direction to be used for the current block and one or more predictors using the one or more corresponding intra prediction directions of the one or more neighboring blocks. The corresponding weights for the one or more neighboring blocks decrease with increased distance of the pixel to the one or more neighboring blocks.

公开(公告)号：US11212554B2

公开(公告)日：2021-12-28

申请号：US17114103

申请日：2020-12-07

Applicant: InterDigital VC Holdings, Inc.

Inventor： Gagan Bihari Rath ,  Fabrice Le Leannec ,  Franck Galpin ,  Fabien Racape

IPC: H04N19/00 ,  H04N19/593 ,  H04N19/176

Abstract: A method for video decoding is disclosed. A directional intra prediction mode is decoded for a block of a picture, the directional intra prediction mode having a direction. Based on the directional intra prediction mode, a first predictor and a second predictor for a sample in the current block are accessed, the first and second predictors being on a line at least approximating the direction. A sample value of the sample is predicted by interpolation using the first and second predictors, responsive to a difference between the second and first predictors, wherein the difference is scaled by at least a ratio that is based on a location of the sample in the block, and wherein a denominator of the ratio is a power of two regardless of the location of the sample. The sample of the block is reconstructed based on the predicted sample value.