公开(公告)号：US12143637B2

公开(公告)日：2024-11-12

申请号：US18539475

申请日：2023-12-14

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Fabrice Leleannec ,  Franck Galpin ,  Tangi Poirier

IPC: 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：US12052418B2

公开(公告)日：2024-07-30

申请号：US17897903

申请日：2022-08-29

Applicant: InterDigital VC Holdings, Inc.

Inventor： Fabrice Leleannec ,  Franck Galpin ,  Fabien Racape ,  Sunil Jaiswal

IPC: H04N19/119 ,  H04N19/102 ,  H04N19/147 ,  H04N19/176 ,  H04N19/70 ,  H04N19/96

CPC classification number: H04N19/119 ,  H04N19/102 ,  H04N19/147 ,  H04N19/176 ,  H04N19/70 ,  H04N19/96

Abstract: A method for encoding a block is disclosed. To this aim, a split mode is determined based on a rate-distortion optimization using a texture-based split prediction set obtained for the block. As an example, the split mode is determined by adapting the texture-based split prediction set according to at least one of a binary or triple split mode non-redundancy constraint or a heuristic-based split mode set pruning. The block is finally encoded using the determined split mode.

公开(公告)号：US11949910B2

公开(公告)日：2024-04-02

申请号：US16652547

申请日：2018-09-28

Applicant: InterDigital VC Holdings, Inc.

Inventor： Philippe Bordes ,  Franck Galpin ,  Fabien Racape

IPC: H04N19/577 ,  H04N19/583

CPC classification number: H04N19/577 ,  H04N19/583

Abstract: Methods (1500, 1600) and apparatuses (700, 900, 1700) for video coding and decoding are provided. The method of video encoding (1500) includes determining (1510) a set of parameters for illumination compensation associated with a first motion compensated reference block of a block in a picture of a video based on a function of a set of samples of the first motion compensated reference block and a set of samples of a second motion compensated reference block of the block, processing (1520) a prediction of the block based on the set of parameters, the prediction being associated with the first motion compensated reference block and encoding (1530) the block based on the processed prediction. A bitstream formatted to include encoded data, a computer-readable storage medium and a computer program product are also described.

公开(公告)号：US11812066B2

公开(公告)日：2023-11-07

申请号：US16338475

申请日：2017-09-21

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Philippe Bordes ,  Gagan Rath ,  Fabien Racape ,  Franck Galpin

IPC: H04N19/85 ,  H04N19/176 ,  H04N19/527 ,  H04N19/61

CPC classification number: H04N19/85 ,  H04N19/176 ,  H04N19/527 ,  H04N19/61

Abstract: The present disclosure relates to methods, apparatus or systems for encoding and decoding sequence of images by applying a global rotation motion compensation to an input image. According to different embodiments, the input image is a reference image in a compression loop or the image to be encoded. The images to encode are omnidirectional images. As a result, applying a global rotation motion compensation to them corresponds to generate new images as if they have been captured according to a different front direction. When this new front direction is the one of a reference image, the compensation of apparent motion is facilitated.

公开(公告)号：US11711525B2

公开(公告)日：2023-07-25

申请号：US17673704

申请日：2022-02-16

Applicant: InterDigital VC Holdings, Inc.

Inventor： Philippe Bordes ,  Franck Galpin ,  Fabien Racape

IPC: H04N19/176 ,  H04N19/105 ,  H04N19/52

CPC classification number: H04N19/176 ,  H04N19/105 ,  H04N19/52

Abstract: Different implementations are described for determining one or more illumination compensation parameters for a current block being encoded by a video encoder or decoded by a video decoder, based on the selection of one or more neighboring samples. The selection of the one or more neighboring samples is based on information used to reconstruct a plurality of neighboring reconstructed blocks. The selection may be based on the motion information, such as motion vector and reference picture information. In one example, only samples from neighboring reconstructed blocks that have (1) the same reference picture index and/or (2) a motion vector close to the motion vector of the current block is selected. In another example, if the current block derives or inherits some motion information from a top or left neighboring block, then only the top or left neighboring samples are selected for IC parameter calculation.

公开(公告)号：US11553175B2

公开(公告)日：2023-01-10

申请号：US17373927

申请日：2021-07-13

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：US20220377358A1

公开(公告)日：2022-11-24

申请号：US17761487

申请日：2020-09-15

Applicant: InterDigital VC Holdings, Inc.

Inventor： Franck Galpin ,  Xuan Hien Pham ,  Jean Begaint

IPC: H04N19/436 ,  H04N19/167 ,  H04N19/177 ,  H04N19/105 ,  H04N19/85 ,  H04N19/172 ,  H04N19/137 ,  H04N19/543 ,  H04N19/573

Abstract: At least a method and an apparatus are presented for efficiently encoding or decoding video. For example, a plurality of frames is provided to a motion estimator to produce an output comprising estimated motion information. The estimated motion information is provided to an auto-encoder or an auto-decoder to produce an output comprising reconstructed motion field. The reconstructed motion field and one or more decoded frames of the plurality of frames are provided to a deep neural network to produce an output comprising refined bi-directional motion field. The video is encoded or decoded based on the refined bi-directional motion field.

公开(公告)号：US11363254B2

公开(公告)日：2022-06-14

申请号：US17015456

申请日：2020-09-09

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Fabien Racape ,  Franck Galpin ,  Tangi Poirier

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

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：US20220030268A1

公开(公告)日：2022-01-27

申请号：US17277199

申请日：2019-09-20

Applicant: InterDigital VC Holdings, Inc.

Inventor： Fabrice Le Leannec ,  Franck Galpin ,  Tangi Poirier ,  Philippe Bordes

IPC: H04N19/55 ,  H04N19/176

Abstract: In general, encoding or decoding a picture part can involve determining a spatiotemporal motion vector predictor (STMVP) candidate for a merge mode of operation from spatial motion vector candidates taken from spatial positions around a current coding unit (CU) and a temporal motion vector candidate, where at least one embodiment involves determining the STMVP candidate based on considering at most two spatial positions and based on an average of at least two of the spatial and temporal motion vector candidates.

公开(公告)号：US11223830B2

公开(公告)日：2022-01-11

申请号：US16760890

申请日：2019-01-22

Applicant: InterDigital VC Holdings, Inc.

Inventor： Tangi Poirier ,  Fabrice Leleannec ,  Franck Galpin ,  Ya Chen

IPC: H04N19/137 ,  H04N19/105 ,  H04N19/176 ,  H04N19/46

Abstract: Different implementations are described for determining one or more illumination compensation parameters for a current block being encoded by a video encoder or decoded by a video decoder. A plurality of motion vectors for a current block being encoded in a picture are determined. One or more illumination compensation parameters for each of the plurality of motion vectors are determined and encoded or decoded. The current block is then encoded or decoded using the plurality of motion vectors and the one or more illumination compensation parameters for each of the plurality of motion vectors. In one embodiment, a flag is used to signal the use or not of the illumination compensation. In another embodiment, the illumination compensation flag is not encoded or decoded if illumination compensation is not used.