公开(公告)号：US12063376B2

公开(公告)日：2024-08-13

申请号：US18197695

申请日：2023-05-15

Applicant: InterDigital VC Holdings, Inc.

Inventor： Fabrice Le Léannec ,  Tangi Poirier ,  Ya Chen ,  Philippe Bordes

IPC: H04N19/00 ,  H04N19/136 ,  H04N19/176 ,  H04N19/186

CPC classification number: H04N19/186 ,  H04N19/136 ,  H04N19/176

Abstract: A Local illumination compensation system for video encoding and decoding uses memory for storing illumination compensation parameters and does not require access to reconstructed pixels of neighboring blocks. A set of illumination compensation parameters is stored in a dedicated buffer, which is of limited size, and which is decoupled from the coding unit level storage of information. The buffer contains a set of illumination compensation parameters, which may be, for example, computed (or determined in some other manner) on the fly or determined beforehand (for example for example obtained from the video signal or from a device).

公开(公告)号：US20240267522A1

公开(公告)日：2024-08-08

申请号：US18638301

申请日：2024-04-17

Applicant: InterDigital VC Holdings, Inc.

Inventor： Franck Galpin ,  Fabrice Le Leannec ,  Philippe Bordes

IPC: H04N19/13 ,  H04N19/105 ,  H04N19/159 ,  H04N19/172 ,  H04N19/46

CPC classification number: H04N19/13 ,  H04N19/105 ,  H04N19/159 ,  H04N19/172 ,  H04N19/46

Abstract: In general, encoding or decoding a picture part can involve a first CABAC probability model associated with a first flag indicating use of an affine mode and a second CABAC probability model associated with a second flag indicating use of either the affine mode or a second mode different from the affine mode, where the first and second CABAC probability models are different and are determined independently.

公开(公告)号：US20240223761A1

公开(公告)日：2024-07-04

申请号：US18402004

申请日：2024-01-02

Applicant: InterDigital VC Holdings, Inc.

Inventor： Philippe De Lagrange ,  Philippe Bordes ,  Edouard Francois

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

CPC classification number: H04N19/124 ,  H04N19/176 ,  H04N19/186

Abstract: An image is split into a plurality of blocks of various sizes and a subdivision level counter is associated to each of the blocks. The value of this subdivision level counter for a block is representative of the size of the block and is used to determine the quantization parameter for the block. The value is propagated for each subdivision and incremented according the type of the subdivision. When the image is split, an analysis is done according to the subdivision level counter, a maximal value of subdivision and the type of split, in order to determine the start of a new quantization group and when it is the case, the current position of the partition is propagated to the further split partitions to be stored with these partition and serve in the prediction process when decoding.

公开(公告)号：US12022051B2

公开(公告)日：2024-06-25

申请号：US17873038

申请日：2022-07-25

Applicant: InterDigital VC Holdings, Inc.

Inventor： Pierre Andrivon ,  Philippe Bordes ,  Emmanuel Jolly

IPC: H04N11/20 ,  H04N11/24 ,  H04N19/186 ,  H04N19/46 ,  H04N19/70

CPC classification number: H04N11/20 ,  H04N11/24 ,  H04N19/186 ,  H04N19/46 ,  H04N19/70

Abstract: A method includes encoding a first message including first parameters for a first color transform that transforms a video signal into a first color-mapped video signal; encoding a second message including second parameters for a second color transform that transforms the video signal into a second color-mapped video signal; and encoding the video signal, the first message, and the second message in a video bitstream. A method includes decoding the video bitstream into the video signal, the first message including the first parameters, and the second message including the second parameters, and performing at least one of the following: displaying the video signal; transforming the video signal into the first color-mapped video signal by applying the first color transform and displaying the first color-mapped video signal; and transforming the video signal into the second color-mapped video signal by applying the second color transform and displaying the second color-mapped video signal.

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：US20230362396A1

公开(公告)日：2023-11-09

申请号：US18222860

申请日：2023-07-17

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Philippe Bordes ,  Franck Hiron ,  Pierre Andrivon ,  Patrick Lopez ,  PHILIPPE SALMON

IPC: H04N19/44 ,  H04N21/438 ,  H04N21/235 ,  H04N19/573 ,  H04N19/30 ,  H04N19/176 ,  H04N19/50

CPC classification number: H04N19/44 ,  H04N21/4384 ,  H04N21/2358 ,  H04N19/573 ,  H04N19/30 ,  H04N19/176 ,  H04N19/50

Abstract: A method for decoding a picture block is disclosed. The decoding method comprises:—decoding (10) at least one stream S_diff into decoded data and into one information for identifying a re-constructed reference picture in a decoder picture buffer;—reconstructing (12) a special reference picture from at least the identified reconstructed reference picture and from the decoded data;—reconstructing (16) the picture block from at least the special reference picture, wherein the at least the special reference picture is not displayed.

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：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：US11563966B2

公开(公告)日：2023-01-24

申请号：US16964255

申请日：2019-01-25

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Franck Galpin ,  Ya Chen ,  Philippe Bordes

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

Abstract: Inferring an illumination compensation flag during encoding or decoding of a video image signal using frame rate up conversion can save one bit and eliminate complexity. The illumination compensation flag can be derived from the corresponding flags of at least one bi-predictive or bi-directional prediction candidates. The flag can also be derived from some function of the flags from those candidates. Alternatively, several flags can be used for respective coding or decoding of blocks if there are more than one prediction candidate using illumination compensation.