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：US20210400269A1

公开(公告)日：2021-12-23

申请号：US17292294

申请日：2019-11-19

Applicant: InterDigital VC Holdings, Inc.

Inventor： Tangi Poirier ,  Karam Naser ,  Edouard Francois

IPC: H04N19/119 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176

Abstract: At least a method and an apparatus are provided for efficiently encoding or decoding video. For example, a plurality of different motion prediction modes for a current block are obtained. The current block is encoded or decoded based on a combination of the plurality of different motion prediction modes with corresponding weights for a plurality of sub-blocks of the current block, wherein the combination with the corresponding weights comprising an inter prediction mode and an intra prediction mode.

公开(公告)号：US11146790B2

公开(公告)日：2021-10-12

申请号：US16497565

申请日：2018-03-23

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

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：US11109027B2

公开(公告)日：2021-08-31

申请号：US16477430

申请日：2018-01-08

Applicant: InterDigital VC Holdings, Inc.

Inventor： Fabrice Urban ,  Tangi Poirier ,  Fabrice Leleannec

IPC: H04N11/02 ,  H04N19/12 ,  H04N19/105 ,  H04N19/176 ,  H04N19/60

Abstract: The present principles relates to a method and device 1. A method for encoding a residual block comprising: —obtaining (500) a first coding mode relative to a first 2D transform when coding the residual blocks according a coding mode relative to a first 2D transform is enabled; —obtaining (510) a second coding mode relative to a second 2D transform when coding the residual blocks according to a coding mode relative to a second 2D transform is enabled; and —encoding (530) the residual block according to either said first coding mode or said second coding mode or both; the method is characterized in that enabling or disabling (520) the coding of the residual block according to said second coding mode depends on said first coding mode. The present principles relates also to a method and device for encoding/decoding a picture.

公开(公告)号：US20210243465A1

公开(公告)日：2021-08-05

申请号：US17051825

申请日：2019-05-07

Applicant: InterDigital VC Holdings, Inc.

Inventor： YA Chen ,  Franck Galpin ,  Tangi Poirier

IPC: H04N19/513 ,  H04N19/132 ,  H04N19/149 ,  H04N19/46 ,  H04N19/176

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：US20210195204A1

公开(公告)日：2021-06-24

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 ,  H04N19/46 ,  H04N19/176

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.

公开(公告)号：US11032542B2

公开(公告)日：2021-06-08

申请号：US16477514

申请日：2017-12-26

Applicant: InterDigital VC Holdings, Inc.

Inventor： Philippe Bordes ,  Tangi Poirier ,  Fabien Racape

IPC: H04N19/117 ,  H04N19/167 ,  H04N19/176 ,  H04N19/196 ,  H04N19/147

Abstract: A decoding method for decoding an image is disclosed. The decoding method comprises for at least one slice of the image: —decoding (S210) the slice from a bitstream; —determining (S230) information representative of a size of a region of the decoded slice, the size being different from a size of a basic coding block used for decoding the slice; and—filtering (S240) the decoded slice by applying a filter on the region identified by the determined information.

公开(公告)号：US20210021831A1

公开(公告)日：2021-01-21

申请号：US17040023

申请日：2019-04-08

Applicant: InterDigital VC Holdings, Inc.

Inventor： Ya Chen ,  Fabrice Le Leannec ,  Tangi Poirier

IPC: H04N19/13 ,  H04N19/159 ,  H04N19/18 ,  H04N19/176

Abstract: A significance-coefficient flag indicates whether a given quantized transform coefficient is equal to zero or not. To encode the significant-coefficient flags, context-based entropy coding can be used. To adapt to the characteristics of a video sequence, the context model is selected based on the statistics of the transform coefficients. In one embodiment, the non-zero probabilities of transform coefficients are compared to different thresholds to divide a transform block into several context regions, where all coefficients in a context region use the same set of context models. In another embodiment, the transform block is first divided into several context regions based on the positions of the transform coefficients, and the non-zero probabilities of transform coefficients are compared with a threshold to divide each context region into two sub-regions, where all coefficients in a sub-region share the same set of context models.

公开(公告)号：US12262028B2

公开(公告)日：2025-03-25

申请号：US17408317

申请日：2021-08-20

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Fabrice Urban ,  Franck Galpin ,  Tangi Poirier ,  Fabrice Leleannec

IPC: H04N19/186 ,  H04N19/96

Abstract: The present principles relates to a method for encoding an image unit comprising image data represented by a luminance channel and at least one chrominance channel, the method comprising obtaining a luma coding-tree by splitting a luminance unit representative of the luminance channel of said image unit and obtaining a chroma coding-tree by splitting a chrominance unit representative of at least one chrominance channel of said image unit. The method is characterized in that obtaining said chroma coding-tree comprises: determining whether said chroma coding-tree and said luma coding-tree are identical; and signaling an information data indicating whether said chroma coding-tree and said luma coding-tree are identical.

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.