公开(公告)号：US11991394B2

公开(公告)日：2024-05-21

申请号：US15734156

申请日：2019-05-28

Applicant: InterDigital VC Holdings, Inc.

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

IPC: H04N7/12 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70 ,  H04N19/96

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

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, video signal, computer program and non-transitory readable medium are proposed.

公开(公告)号：US11991373B2

公开(公告)日：2024-05-21

申请号：US17434152

申请日：2020-02-25

Applicant: InterDigital VC Holdings, Inc.

Inventor： Edouard Francois ,  Fabrice LeLeannec ,  Tangi Poirier

IPC: H04N19/186 ,  H04N19/119 ,  H04N19/176

CPC classification number: H04N19/186 ,  H04N19/119 ,  H04N19/176

Abstract: A cross-component dependent tool to be used for a chroma block of a picture is enabled responsive to a size of said chroma block and to a size of at least one luma block co-located with the chroma block. Then, the chroma block is decoded responsive to said enablement of said cross-component dependent tool. A encoding and decoding methods are presented as well as encoding and decoding devices.

公开(公告)号：US11962753B2

公开(公告)日：2024-04-16

申请号：US17277973

申请日：2019-09-19

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: A decoding method is presented. An illumination compensation parameter is first 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：US20240121423A1

公开(公告)日：2024-04-11

申请号：US18538846

申请日：2023-12-13

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：US11818349B2

公开(公告)日：2023-11-14

申请号：US17400732

申请日：2021-08-12

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Fabrice Leleannec ,  Tangi Poirier ,  Gagan Rath ,  Fabrice Urban

IPC: H04N19/122 ,  H04N19/119 ,  H04N19/176 ,  G06T9/40 ,  H04N19/70

CPC classification number: H04N19/122 ,  G06T9/40 ,  H04N19/119 ,  H04N19/176 ,  H04N19/70

Abstract: An improvement in coding efficiency is achieved through restrictions on successive divisions of asymmetric splitting in advanced video coding algorithms, which frequently rely on splitting of a block of video data prior to coding using several transform sizes. Successive divisions of asymmetric splitting are forbidden if an equivalent split can be attained using triple splitting. In an embodiment, a video block is split using successive splits, but the second type of split is dependent on the first type of split.

公开(公告)号：US20230336775A1

公开(公告)日：2023-10-19

申请号：US18211466

申请日：2023-06-19

Applicant: InterDigital VC Holdings, Inc,

Inventor： Philippe Bordes ,  Fabrice Leleannec ,  Tangi Poirier ,  Philippe De Lagrange

IPC: H04N19/577 ,  H04N19/176 ,  H04N19/44 ,  H04N19/70

CPC classification number: H04N19/577 ,  H04N19/176 ,  H04N19/44 ,  H04N19/70

Abstract: A decoding method is presented. At least one high level syntax element is decoded that indicates whether generalized bi-prediction applies for predicting blocks of a slice. A block is then decoded from said slice using generalized bi-prediction in the case where said at least one high level syntax element indicates to apply generalized bi-prediction.

公开(公告)号：US11778190B2

公开(公告)日：2023-10-03

申请号：US16077471

申请日：2017-02-03

Applicant: InterDigital VC Holdings, Inc.

Inventor： Fabrice Le Leannec ,  Tangi Poirier ,  Gagan Rath ,  Fabrice Urban

IPC: H04N19/129 ,  H04N19/119 ,  H04N19/593 ,  H04N19/159 ,  H04N19/176

CPC classification number: H04N19/129 ,  H04N19/119 ,  H04N19/159 ,  H04N19/176 ,  H04N19/593

Abstract: The present principles relates to a method for intra-predictive encoding a coding unit comprising picture data, said intra-predictive encoding depending on a prediction tree and a transform tree, characterized in that the method further comprises: —obtaining said prediction tree by spatially partitioning the coding unit according to a non-square partition type; —determining said transform tree from said coding unit in order that each of its leaves is embedded into a unique unit of said obtained prediction tree; and —signaling in a signal the size of the leaves of said transform tree and said a non-square partition type.

公开(公告)号：US11677976B2

公开(公告)日：2023-06-13

申请号：US17277953

申请日：2019-09-18

Applicant: InterDigital VC Holdings, Inc.

Inventor： Fabrice Leleannec ,  Tangi Poirier ,  Philippe Bordes

IPC: H04N19/577 ,  H04N19/105 ,  H04N19/119 ,  H04N19/176 ,  H04N19/182 ,  H04N19/186

CPC classification number: H04N19/577 ,  H04N19/105 ,  H04N19/119 ,  H04N19/176 ,  H04N19/182 ,  H04N19/186

Abstract: Different implementations are described, particularly implementations for video encoding and decoding using motion compensation with bi-prediction are presented. The encoding method comprises for a picture, obtaining a first predictor for a block of the picture using a first reference picture; obtaining a second predictor for said block of the picture using a second reference picture; using the first predictor and the second predictor for forming a third predictor for the block in bi-prediction inter prediction, wherein the third predictor is obtained as a weighted average of the first predictor and the second predictor; and wherein a weight used in the weighed prediction depend on the position of the sample in the block. Others embodiments are presented for implementing block triangle partition prediction, for implementing block partition prediction using multiple patterns and for corresponding motion compensation in decoding method.

公开(公告)号：US11595685B2

公开(公告)日：2023-02-28

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：US11539947B2

公开(公告)日：2022-12-27

申请号：US16642562

申请日：2018-08-31

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Antoine Robert ,  Tangi Poirier ,  Simon Danten

IPC: H04N19/53 ,  H04N19/119 ,  H04N19/176 ,  H04N19/52 ,  H04N19/55

Abstract: Motion information for an internal sub-block of a larger block can be derived for use in encoding or decoding the video block or a coding unit by using the motion information for sub-blocks on the left or top edge of the coding block. The left column of edge sub-blocks and the top row of sub-blocks has motion information, such as motion vectors, derived using such techniques as template matching. The motion vectors of these edge sub-blocks are used in deriving the motion vectors of internal sub-blocks, which leads to better prediction and improved coding efficiency. In another embodiment, other motion information for internal sub-blocks is derived from corresponding information of the edge sub-blocks.