公开(公告)号：US12244831B2

公开(公告)日：2025-03-04

申请号：US18637693

申请日：2024-04-17

Applicant: InterDigital VC Holdings, Inc.

Inventor： Edouard Francois ,  Fabrice Leleannec ,  Tangi Poirier

IPC: 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：US20240251078A1

公开(公告)日：2024-07-25

申请号：US18422695

申请日：2024-01-25

Applicant: InterDigital VC Holdings, Inc.

Inventor： Fabrice Leleannec ,  Franck Galpin ,  Tangi Poirier

IPC: H04N19/119 ,  H04N19/124 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18 ,  H04N19/91

CPC classification number: H04N19/119 ,  H04N19/124 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18 ,  H04N19/91

Abstract: Different implementations are described, particularly implementations for video encoding and decoding based on asymmetric binary partitioning of image blocks are presented. The encoding method comprises for a picture, wherein at least one component of the picture is divided into blocks of samples, partitioning a block into block partitions, wherein at least one block partition has a size equal to a positive integer different from a power of 2 in width and/or height, generating a residual by predicting the block partitions and subtracting the prediction from the block partitions, splitting the generated residual into at least two residual blocks with a size equal to a power of 2 in width and height and transforming the at least two residual blocks into transform coefficients, quantizing the transform coefficients, and entropy coding of the quantized transform coefficients. Correspondingly, the decoding method comprises receiving in a bitstream quantized transform coefficients, entropy decoding, de-quantizing and inverse transforming the transform coefficients to obtain residual blocks with a size equal to a power of 2 in width and height, merging at least two residual blocks to reconstruct a residual for a block partition having a size equal to a positive integer different from a power of 2 in width and/or height and reconstructing a block of the picture by predicting the block partitions and combining the residuals with the predicted block partitions. Ohers embodiments are presented for a block partitioning on the border of the picture and for setting maximum and/or minimum block sizes.

公开(公告)号：US11962807B2

公开(公告)日：2024-04-16

申请号：US17431819

申请日：2020-03-05

Applicant: InterDigital VC Holdings, Inc.

Inventor： Ya Chen ,  Fabrice Leleannec ,  Tangi Poirier

IPC: H04N19/70 ,  H04N9/46 ,  H04N19/13 ,  H04N19/176 ,  H04N19/46

CPC classification number: H04N19/70 ,  H04N19/13 ,  H04N19/176 ,  H04N19/46

Abstract: Encoding or decoding syntax information associated with video information can involve identifying a coding context associated with a syntax element of a current coding unit of the video information, wherein the identifying occurs without using a syntax element of a neighboring block, and encoding or decoding the syntax element of the current coding unit based on the coding context.

公开(公告)号：US20230291922A1

公开(公告)日：2023-09-14

申请号：US18198886

申请日：2023-05-18

Applicant: InterDigital VC Holdings, Inc.

Inventor： Fabrice Leleannec ,  Tangi Poirier ,  Ya Chen

IPC: H04N19/44 ,  H04N19/60 ,  H04N19/70 ,  H04N19/176

CPC classification number: H04N19/44 ,  H04N19/176 ,  H04N19/60 ,  H04N19/70

Abstract: A decoding method is disclosed. First, context for a syntax clement associated with a current transform coefficient of a block of a picture is determined. The context is determined based on the area of said block, on the position of the current transform coefficient within the block and on the number of non-zero neighboring transform coefficients in a local template. Second, the syntax element is decoded based at least on the determined context. Advantageously, the local template depends on the shape of said block.

公开(公告)号：US11483559B2

公开(公告)日：2022-10-25

申请号：US17056971

申请日：2019-05-21

Applicant: InterDigital VC Holdings, Inc.

Inventor： Fabrice Leleannec ,  Franck Galpin ,  Tangi Poirier ,  Gagan Rath

IPC: H04N19/119 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/46 ,  H04N19/88

Abstract: Different implementations are described, particularly implementations for video encoding and decoding based on wherein the partitioning tree structure is partially shared between luma and chroma blocks are presented. According to an implementation, a single partitioning tree structure is shared between luma and chroma blocks from a root node of the partitioning tree down to a switching node and a dual partitioning tree structure is determined for luma and chroma blocks from the switching node down to a leaf node of the partitioning tree. Thus, this implementation optimizes the coding efficiency by allowing separated trees for smaller blocks, while limiting the complexity of decoding pipeline.

公开(公告)号：US20220210457A1

公开(公告)日：2022-06-30

申请号：US17700284

申请日：2022-03-21

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： SEBASTIEN LASSERRE ,  Fabrice Leleannec ,  Yannick Olivier

IPC: H04N19/44 ,  H04N19/30 ,  H04N19/136 ,  H04N19/186 ,  H04N19/126 ,  H04N19/98

Abstract: The present disclosure generally relates to a device and a method of decoding a color picture from a bitstream. It comprises: obtaining an expanded range luminance as a first component by applying a nonlinear dynamic expansion function to a luminance component obtained from the bitstream, wherein said nonlinear dynamic expansion function is determined depending on an inverse of a dynamic reduction function that has been applied to an original luminance component obtained when encoding the color picture; obtaining a second component by calculating a square root of a difference between a value determined by the first component and another value computed as a linear combination of a multiplication product of two chrominance components and square values of the two chrominance components obtained from the bitstream, and obtaining at least one color component of the color picture to be decoded at least from said second component and said two chrominance components by determining said at least one color component as a linear combination of the second component and the two chrominance components.

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：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：US11006116B2

公开(公告)日：2021-05-11

申请号：US16340064

申请日：2017-08-31

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Fabrice Leleannec ,  Gagan Rath ,  Fabrice Urban

IPC: H04N19/13 ,  H04N19/147 ,  H04N19/172 ,  H04N19/18

Abstract: The present principles relate to a method an device for context-adaptive binary arithmetic coding/decoding a sequence of binary symbols representing a syntax element related to picture data belonging to a picture block. Said method comprising, for each binary symbol of the sequence of binary symbols: —determining (110) a context according to the size of the picture block and the binary symbol to be coded; and —arithmetic-coding/decoding (120) said binary symbol taking into account said determined context; characterized in that said determining (110) of a context comprises: —when the size of said picture block is a power of 2, determining (910) a context according to the size of said picture block; and —when the size of said picture block is not a power of 2, determining (920) a context according to a block size immediately higher or lower than the size of said picture block, said block size being equal to a power of 2.