公开(公告)号：US20210297706A1

公开(公告)日：2021-09-23

申请号：US17258821

申请日：2019-07-10

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Fabien RACAPE ,  Philippe BORDES ,  Edouard FRANCOIS

IPC: H04N19/82 ,  H04N19/70 ,  H04N19/176 ,  H04N19/167 ,  H04N19/196 ,  H04N19/117

Abstract: Methods and apparatus for performing in-loop filtering in an encoder or a decoder provide regions which use a common set of filter parameters An index can be sent from an encoder to a decoder indicating which set of filter parameters is to be used for a particular region. The in-loop filter can be Sample Adaptive Offset, Adaptive Loop Filter, or any other such filter. An encoder classifies regions of a picture according to blocks using a common set of filter parameter. The classification can be in the form of a map. Filtering blocks use the common set of filter parameters for a region. A decoder parses a bitstream for a set of filter parameters and an index indicative of the filter parameter set for a region being decoded.

公开(公告)号：US20210014523A1

公开(公告)日：2021-01-14

申请号：US17041157

申请日：2019-03-25

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Tangi POIRIER ,  Edouard FRANCOIS ,  Fabrice URBAN

IPC: H04N19/517

Abstract: Decoders can use prediction based on weighted distortion to determine information used to make decisions regarding motion vectors, reference pixels, and coding modes, similar to a corresponding encoder operation. Samples in and around a current block and samples of reference pictures are weighted and a distortion metric generated to determine the decisions. Embodiments are described for prediction modes such as Cross-component linear model (CCLM), Local Illumination Compensation (LIC), and Frame Rate Up-Conversion (FRUC). Various embodiments describe derivation of weighting factors used in the decision making, comprising inference by a decoder, basing weighting factors on a quantization parameter, local activity of a block, and samples of temporally close reference pictures.

公开(公告)号：US20200219236A1

公开(公告)日：2020-07-09

申请号：US16488574

申请日：2018-02-19

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Yannick OLIVIER ,  Edouard FRANCOIS ,  Pierre ANDRIVON ,  David TOUZE

IPC: G06T5/00 ,  G06T5/50 ,  G06T3/40 ,  G06T9/00 ,  H04L29/06

Abstract: The present principles relates to a method and device for reconstructing an High-Dynamic-Range image represented by one reconstructed High-Dynamic-Range luma component (Ŷ′) and two reconstructed High-Dynamic-Range chroma components (Û′, (I)) from a Standard-Dynamic-Range image represented by a Standard-Dynamic-Range luma component (y′, y′1) and two Standard-Dynamic-Range chroma components (u′, v′). The method is characterized in that the method comprises: inverse-mapping (22) said Standard-Dynamic-Range luma component (y′, y′1) to obtain said reconstructed High-Dynamic-Range luma component (Ŷ′); and correcting (33) said two Standard-Dynamic-Range chroma components (u′, v′) to obtain said two reconstructed High-Dynamic-Range chroma components (Û′, (I)) according to said Standard-Dynamic-Range luma component (y′, y′1) and said reconstructed High-Dynamic-Range luma component (Ŷ′).

公开(公告)号：US20190116366A1

公开(公告)日：2019-04-18

申请号：US16090263

申请日：2017-03-14

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Pierre ANDRIVON ,  Philippe BORDES ,  Edouard FRANCOIS

IPC: H04N19/176 ,  H04N19/70 ,  H04N19/167 ,  H04N19/124 ,  H04N19/517

Abstract: A method and an apparatus for encoding a video into a bitstream carrying windows processing coordinates for locally post-processing a video is presented. Such a method comprises:—encoding at least one picture of said video into a bitstream (301),—encoding (302) at least one Supplemental Enhancement Information nesting message, wherein encoding said at least one Supplemental Enhancement Information nesting message comprises:—encoding (303) at least one set of parameters representative of a location of a region in said picture,—encoding (304) at least one Supplemental Enhancement Information message, wherein said at least one Supplemental Enhancement Information message encodes processing information for processing pixels comprised in said region of said picture.

公开(公告)号：US20240314337A1

公开(公告)日：2024-09-19

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

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：US20230344995A1

公开(公告)日：2023-10-26

申请号：US18206941

申请日：2023-06-07

Applicant: InterDigital VC Holdings, Inc.

Inventor： Philippe BORDES ,  Philippe DE LAGRANGE ,  Edouard FRANCOIS

IPC: H04N19/117 ,  H04N19/176 ,  H04N19/70 ,  H04N19/80 ,  H04N19/174

CPC classification number: H04N19/117 ,  H04N19/176 ,  H04N19/70 ,  H04N19/80 ,  H04N19/174

Abstract: Methods and apparatuses for video coding and decoding are provided. The method of video encoding includes accessing a reconstructed block corresponding to a block in a picture of a video, determining at least one filter pattern based on a property of the block and filtering the reconstructed block according to the at least one filter pattern. The method of video decoding includes accessing a reconstructed block corresponding to a block in a picture of an encoded video, determining at least one filter pattern based on a property of the block and filtering the reconstructed block according to the at least one filter pattern. A bitstream formatted to include encoded data, a computer-readable storage medium and a computer program product are also described.

公开(公告)号：US20220385913A1

公开(公告)日：2022-12-01

申请号：US17844462

申请日：2022-06-20

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Edouard FRANCOIS ,  Christophe CHEVANCE ,  Franck HIRON

IPC: H04N19/132 ,  H04N19/136 ,  H04N19/176 ,  H04N19/186

Abstract: A method for encoding a block of a picture is disclosed. The method comprises for at least one sample of the block and for one current component: obtaining a prediction value; determining a mapped residual value from a source value of the sample and from the prediction value responsive to a mapping function; and encoding the mapped residual value into a bitstream; wherein the mapping function is derived to obtain at least one of a reduction of a bit cost of the bitstream for a given quality of reconstruction or an increase of quality of reconstruction for a given bit cost of the bitstream.

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：US20210274182A1

公开(公告)日：2021-09-02

申请号：US17255746

申请日：2019-05-30

Applicant: InterDigital VC Holdings, Inc.

Inventor： Fabrice LELEANNEC ,  Tangi POIRIER ,  Ya CHEN ,  Edouard FRANCOIS

IPC: H04N19/13 ,  H04N19/44 ,  H04N19/25 ,  H04N19/157 ,  H04N19/119 ,  H04N19/103

Abstract: An encoding method is disclosed. At least one context is first determined for encoding a syntax element associated with a block of a picture responsive to a current quantization parameter associated with the block. Second, the syntax element is context-based entropy encoded with the at least one determined context.

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.