公开(公告)号：US20240214557A1

公开(公告)日：2024-06-27

申请号：US18600358

申请日：2024-03-08

Applicant: InterDigital VC Holdings, Inc.

Inventor： Ya CHEN ,  Tangi POIRIER ,  Philippe BORDES ,  Fabrice LELEANNEC ,  Franck GALPIN

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/176 ,  H04N19/46

CPC classification number: H04N19/105 ,  H04N19/132 ,  H04N19/176 ,  H04N19/46

Abstract: Described are methods and apparatuses wherein an illumination compensation parameter is determined for a current block of a picture. The illumination compensation parameter is determined from one or more illumination compensation parameters or from one or more reconstructed samples of at least one spatially neighbor block only in the case where said at least one spatially neighbor block belongs to the same local illumination compensation group as the current block, called current local illumination compensation group. Finally, the current block is reconstructed using the determined illumination compensation parameter.

公开(公告)号：US20220159265A1

公开(公告)日：2022-05-19

申请号：US17438836

申请日：2020-03-12

Applicant: InterDigital VC Holdings, Inc.

Inventor： Franck GALPIN ,  Fabrice LELEANNEC ,  Edouard FRANCOIS

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

Abstract: A method for obtaining a temporal motion vector predictor is disclosed. A new temporal motion vector predictor is obtained by using a motion vector of a block in a collocated image. The block is displaced (with respect spatial location of the current block) by a motion vector coming from a new temporal motion vector predictor (TMVP) process.

公开(公告)号：US20220155596A1

公开(公告)日：2022-05-19

申请号：US17440911

申请日：2020-03-18

Applicant: interDigital VC Holdings, Inc.

Inventor： Pierre ANDRIVON ,  Franck GALPIN ,  Fabrice URBAN

IPC: G02B27/01

Abstract: A method and an apparatus are defined for displaying images on a flexible display in a head-mountable device (HMD). One or more flexible display devices may be inserted in the HMD. The one or more flexible display devices may be constrained by the HMD to take a particular curved form and wrap the field of view (FOV) of images displayed on the one or more flexible display devices for an improved user experience. The display surface of the one or more flexible displays may be divided in display areas, the display areas corresponding to a focus area and a peripheral FOV. Image processing may be differentiated features as a function of according to display area.

公开(公告)号：US20210211650A1

公开(公告)日：2021-07-08

申请号：US17253680

申请日：2019-06-14

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Antoine ROBERT ,  Franck GALPIN ,  Tangi POIRIER

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

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：US20210195161A1

公开(公告)日：2021-06-24

申请号：US16756244

申请日：2018-10-16

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Fabien RACAPE ,  Franck GALPIN ,  Antoine ROBERT

IPC: H04N13/161 ,  H04N13/178 ,  H04N13/156 ,  H04N19/70

Abstract: Methods and apparatus enable video coding and decoding related to omnidirectional video, such as stereo omnidirectional video with equirectangular projections. For stereo images of a scene, the video image data is portioned, resampled and arranged so that portions representing both images are able to fit within a frame. A message is sent with the frame to describe either the resampling or arrangement information. In at least one embodiment, the resampling is done horizontally. In at least one embodiment, the message is sent within a Supplemental Enhancement Information message. Corresponding operations reverse the process at a decoder, enabling the two stereo images to be recreated.

公开(公告)号：US20210076058A1

公开(公告)日：2021-03-11

申请号：US17053100

申请日：2019-04-26

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Antoine ROBERT ,  Fabrice LELEANNEC ,  Franck GALPIN

IPC: H04N19/513 ,  H04N19/176 ,  H04N19/70 ,  H04N19/96

Abstract: A video encoder or decoder processes portions of video with less delay when its processes are parallelized and avoids delays caused by dependence on the completion of prior processes. In one embodiment, a motion vector predictor from a neighboring block of video is used in a subsequent later block of video before it is finished being refined for use in the neighboring block. In another embodiment, information from a neighboring block is confined to include blocks in the same coding tree unit. In another embodiment, a motion vector predictor is checked to see whether it is already in a list of candidates before adding it to the list to expedite the process.

公开(公告)号：US20210051326A1

公开(公告)日：2021-02-18

申请号：US17043280

申请日：2019-03-27

Applicant: InterDigital VC Holdings, Inc.

Inventor： Fabrice LELEANNEC ,  Franck GALPIN ,  Tangi POIRIER ,  Edouard FRANCOIS

IPC: H04N19/124 ,  H04N19/70 ,  H04N19/186 ,  H04N19/176 ,  H04N19/51

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：US20200007893A1

公开(公告)日：2020-01-02

申请号：US16477021

申请日：2018-01-05

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Fabrice LELEANNEC ,  Franck GALPIN ,  Tangi POIRIER

IPC: H04N19/61 ,  H04N19/119 ,  H04N19/105 ,  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：US20190273918A1

公开(公告)日：2019-09-05

申请号：US16336228

申请日：2017-09-18

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Fabien RACAPE ,  Franck GALPIN ,  Tangi POIRIER

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

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：US20190260989A1

公开(公告)日：2019-08-22

申请号：US16334100

申请日：2017-09-28

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Fabien RACAPE ,  Franck GALPIN ,  Philippe BORDES

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

Abstract: In omnidirectional videos, a straight line in the rendering space may no longer appear as a straight line in the frame to be encoded, due to the projection between the encoding space and the rendering space. To adapt to the geometry of omnidirectional videos, intra prediction is performed along non-straight curves. In particular, references samples in neighboring reconstructed blocks of a current block are copied along non-straight curves to form a predicted block for the current block. The non-straight curves may be computed online based on a single intra prediction directional mode for the current block. The parameters of non-straight curves may be based on the mapping used in forming the omnidirectional videos, and the location/size of the current block. The non-straight curves may be obtained using a look-up table or an analytical function that is dependent on the location and size of the current block.