公开(公告)号：US20210092443A1

公开(公告)日：2021-03-25

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: H04N19/593 ,  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.

公开(公告)号：US10893294B2

公开(公告)日：2021-01-12

申请号：US16612519

申请日：2018-05-29

Applicant: InterDigital VC Holdings, Inc.

Inventor： Gagan Rath ,  Fabrice Leleannec ,  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 (910) for a current block of a picture in a video, said directional intra prediction mode having a direction. Based on said directional intra prediction mode, a first predictor for a sample is accessed (7010), the sample being within said current block. Based on said directional intra prediction mode, a second predictor for said sample, is accessed (7020) said first and second predictors being on a line at least approximating said direction. A sample value of said sample is predicted (7030) by using said first and second predictors; and said sample of said current block is reconstructed (965) based on said predicted sample value.

公开(公告)号：US10735774B2

公开(公告)日：2020-08-04

申请号：US16301191

申请日：2017-04-26

Applicant: InterDigital VC Holdings, Inc.

Inventor： Franck Galpin ,  Fabien Racape ,  Philippe Bordes

IPC: H04N19/86 ,  H04N19/117 ,  H04N19/463 ,  H04N19/182 ,  H04N19/82 ,  H04N19/70 ,  H04N19/136 ,  H04N19/176

Abstract: Clipping may be applied during various operations at an encoder or decoder. The lower and upper bounds for clipping can be differentially encoded with respect to predictors. Fixed predictors can be used, for example, 0 and 2bitdepth for the lower and upper bounds, respectively. Adaptive predictors can also be used. Adaptive predictors can be derived from clipping bounds in previously encoded or decoded pictures, or explicitly signaled in a bitstream. Whether to encode the clipping bounds can be determined based on the number of pixels that have values close to the clipping bounds. Additionally, taking advantage of the clipping operation, the prediction residuals can be smoothed, while the distortion for the block may not necessarily increase.

公开(公告)号：US12238277B2

公开(公告)日：2025-02-25

申请号：US18074769

申请日：2022-12-05

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Fabien Racape ,  Franck Galpin ,  Antoine Robert

IPC: H04N11/02 ,  H04N19/105 ,  H04N19/176 ,  H04N19/46 ,  H04N19/52

Abstract: Video signal coding and decoding functions can generate lists of potential candidates to use in coding and decoding, for example, predictors. Video signal coding component candidate undergo operations before potential inclusion in candidate lists. The candidates are checked after being modified by the operations to see if other equal candidates are already in the candidate list. If equal candidates are not in the list, the modified candidates are added to the candidate list. If equal candidates are already in the list, the modified candidates are not added to the list. Operations that can be performed comprise rounding and clipping.

公开(公告)号：US12212771B2

公开(公告)日：2025-01-28

申请号：US18100280

申请日：2023-01-23

Applicant: InterDigital VC Holdings, Inc.

Inventor： Franck Galpin ,  Ya Chen ,  Philippe Bordes

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

Abstract: Inferring an illumination compensation flag during encoding or decoding of a video image signal using frame rate up conversion can save one bit and eliminate complexity. The illumination compensation flag can be derived from the corresponding flags of at least one bi-predictive or bi-directional prediction candidates. The flag can also be derived from some function of the flags from those candidates. Alternatively, several flags can be used for respective coding or decoding of blocks if there are more than one prediction candidate using illumination compensation.

公开(公告)号：US12200197B2

公开(公告)日：2025-01-14

申请号：US18382092

申请日：2023-10-20

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Antoine Robert ,  Franck Galpin ,  Tangi Poirier

IPC: H04N19/105 ,  H04N19/137 ,  H04N19/176 ,  H04N19/30

Abstract: A video encoder or decoder processes portions of video using virtual temporal affine motion candidates. Under the general aspects, virtual temporal affine candidates are created using only the classical temporal motion buffer information, avoiding the storage of additional affine parameters in a temporal motion buffer. A motion field for encoding or decoding a video block is generated based on the virtual temporal affine candidates. In one embodiment, collocated motion candidates are rescaled by adjusting the picture order count of the determined motion field. In another embodiment, resolution adaptation is performed to enable a current motion buffer to correspond to a reference motion buffer.

公开(公告)号：US12167016B2

公开(公告)日：2024-12-10

申请号：US17253236

申请日：2019-05-28

Applicant: InterDigital VC Holdings, Inc.

Inventor： Franck Galpin ,  Ya Chen ,  Philippe Bordes

IPC: H04N19/513 ,  H04N19/172 ,  H04N19/176 ,  H04N19/117

Abstract: A method for decoding a current block of a picture is disclosed. First, at least one illumination compensation parameter for the current block is decoded responsive to a comparison of a parameter of the current block with a value. Then, an accessed motion compensation reference block is compensated in illumination responsive to the at least one illumination compensation parameter. Finally, the current block is reconstructed from the illumination and motion compensated reference block.

公开(公告)号：US20240259605A1

公开(公告)日：2024-08-01

申请号：US18624319

申请日：2024-04-02

Applicant: InterDigital VC Holdings, Inc.

Inventor： Fabrice Leleannec ,  Franck Galpin ,  Tangi Poirier ,  Edouard Francois

IPC: H04N19/70 ,  H04N19/176 ,  H04N19/186 ,  H04N19/96

CPC classification number: H04N19/70 ,  H04N19/176 ,  H04N19/186 ,  H04N19/96

Abstract: In at least one embodiment, the use of new coding tools result into an improvement of coding efficiency. In an example embodiment, efficient signaling of these coding tools is conveying information representative of the coding tools utilized for the encoding, for example from an encoder device to a receiver device (for example a decoder or a display), so that the appropriate tools are used for the decoding stage. These tools comprise new partitioning modes, new intra-prediction modes, improved flexibility for the sample adaptive offset and a new illumination compensation mode for bi-prediction blocks.

公开(公告)号：US11997279B2

公开(公告)日：2024-05-28

申请号：US17282919

申请日：2019-10-09

Applicant: InterDigital VC Holdings, Inc.

Inventor： Franck Galpin ,  Fabrice Le Leannec ,  Philippe Bordes

IPC: H04N19/13 ,  H04N19/105 ,  H04N19/159 ,  H04N19/172 ,  H04N19/46

CPC classification number: H04N19/13 ,  H04N19/105 ,  H04N19/159 ,  H04N19/172 ,  H04N19/46

Abstract: In general, encoding or decoding a picture part can involve a first CABAC probability model associated with a first flag indicating use of an affine mode and a second CABAC probability model associated with a second flag indicating use of either the affine mode or a second mode different from the affine mode, where the first and second CABAC probability models are different and are determined independently.

公开(公告)号：US11956473B2

公开(公告)日：2024-04-09

申请号：US17992159

申请日：2022-11-22

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Edouard Francois ,  Pierre Andrivon ,  Franck Galpin ,  Fabrice Leleannec ,  Michel Kerdranvat

IPC: H04N19/70 ,  H04N19/103 ,  H04N19/157 ,  H04N19/176 ,  H04N19/503

CPC classification number: H04N19/70 ,  H04N19/103 ,  H04N19/157 ,  H04N19/176 ,  H04N19/503

Abstract: Video coding tools can be controlled by including syntax in a video bitstream that makes better use of video decoding resources. An encoder inserts syntax into a video bitstream to enable a decoder to parse the bitstream and easily control which tools combinations are enabled, which combinations are not permitted, and which tools are activated for various components in a multiple component bitstream, leading to potential parallelization of bitstream decoding.