公开(公告)号：US20250016328A1

公开(公告)日：2025-01-09

申请号：US18892053

申请日：2024-09-20

Applicant: InterDigital CE Patent Holdings, SAS

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

IPC: H04N19/139 ,  H04N19/105 ,  H04N19/132 ,  H04N19/176

Abstract: Described are methods and apparatus for estimating weighted prediction parameters intended to be used for predicting an image block. A component of an image block of a video may be precited from a set of options that includes a first version of weighted prediction parameters, a refined version of the weighted prediction parameters, or no weighted prediction parameters, and the image block may be encoded.

公开(公告)号：US12081734B2

公开(公告)日：2024-09-03

申请号：US17620502

申请日：2020-06-23

Applicant: INTERDIGITAL CE PATENT HOLDINGS, SAS

Inventor： Thierry Dumas ,  Franck Galpin ,  Gagan Rath ,  Fabrice Leleannec

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176

CPC classification number: H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176

Abstract: The disclosure relates to a method for encoding image data, the method including intra-predicting, or predicting by combining inter-prediction and intra-prediction, a first block of the image data by using an intra-prediction mode using a first single transformation obtained by taking account of the first block size. The disclosure also relates to a method for encoding image data, a variable coding length being used for signaling a plurality of Prediction Modes by the encoding, the method comprising:—intra-predicting a first block of the image data by using an intra-prediction mode using a first transformation, the first transformation being obtained by taking account of the first block size, —encoding information signaling a use of the intra-prediction mode in a bitstream, the information being encoded as one of the plurality of Prediction Modes. The disclosure further relates to the corresponding decoding methods, devices and media.

公开(公告)号：US20240291987A1

公开(公告)日：2024-08-29

申请号：US18659336

申请日：2024-05-09

Applicant: INTERDIGITAL CE PATENT HOLDINGS, SAS

Inventor： Tangi Poirier ,  Fabrice Leleannec ,  Karam Naser ,  Edouard Francois

IPC: H04N19/12 ,  H04N19/176 ,  H04N19/182

CPC classification number: H04N19/12 ,  H04N19/176 ,  H04N19/182

Abstract: A lossless coding mode is proposed in a video coding system comprising a plurality of coding tools, some being lossy by design, some of which can be adapted to become lossless or near lossless. To enable a lossless mode in such system, it is proposed to disable the tools that are lossy by design and use only lossless tools, to adapt some tools to enable lossless coding, and adapt some tools to enable near-lossless coding so that a secondary lossless coding may be applied after residual coding. In some embodiments, a type of residual coding is determined by, when an information indicates that a transform skip residual coding is used, obtaining a flag representative of a special mode, and when this flag is true, determine that regular residual coding must be used instead of the transform skip residual coding that should be used.

公开(公告)号：US20250047852A1

公开(公告)日：2025-02-06

申请号：US18923315

申请日：2024-10-22

Applicant: InterDigital CE Patent Holdings, SAS

Inventor： Philippe De Lagrange ,  Fabrice Leleannec ,  Edouard Francois ,  Franck Galpin

IPC: H04N19/124 ,  H04N19/103 ,  H04N19/50 ,  H04N19/70

Abstract: Decoding and/or encoding video information included in a bitstream can involve a predicted quantization matrix associated with at least a portion of the video information and a syntax element indicating that at least one coefficient of the predicted quantization matrix is to be interpreted as a residual such that the decoding and/or encoding of at least a portion of the video information is based on a combination of the predicted quantization matrix and the residual, where the syntax element is obtained from the bitstream during decoding, or included in the bitstream during encoding.

公开(公告)号：US12155824B2

公开(公告)日：2024-11-26

申请号：US17912314

申请日：2021-02-23

Applicant: INTERDIGITAL CE PATENT HOLDINGS, SAS

Inventor： Karam Naser ,  Fabrice Leleannec ,  Tangi Poirier ,  Franck Galpin

IPC: H04N19/117 ,  H04N19/176 ,  H04N19/186 ,  H04N19/82

Abstract: A video coding system handling at least a block of at least an image of a video comprises an encoding process and decoding process respectively providing or using signaling information related to the video, wherein the signaling information comprises at least an information representative of the presence of chroma offset values, wherein when chroma is present and does not use separate color planes, the information representative of the presence of chroma offset values is set and the signaling information further comprises information representative of a chroma offsets values and wherein when chroma is not present or uses separate color planes, the information representative of the presence of chroma offset values is reset and no information representative of a chroma offsets values is further signaled.

公开(公告)号：US12081798B2

公开(公告)日：2024-09-03

申请号：US17782226

申请日：2020-12-01

Applicant: INTERDIGITAL CE PATENT HOLDINGS, SAS

Inventor： Philippe De Lagrange ,  Fabrice Leleannec ,  Edouard Francois ,  Philippe Bordes

IPC: H04N19/60 ,  H04N19/12 ,  H04N19/124 ,  H04N19/176 ,  H04N19/186

CPC classification number: H04N19/60 ,  H04N19/12 ,  H04N19/124 ,  H04N19/176 ,  H04N19/186

Abstract: In a video bitstream, Cb and Cr channels are demultiplexed before dequantization instead of after inverse transformation. In this way, regular Cb and Cr quantization control parameters can be used, optionally with minor adjustments when a video block is joint-chroma coded. In one embodiment, some specific quantization control parameters can be specified. In another embodiment, separate Cb and Cr offsets can be specified for joint chroma coded blocks. In another embodiment, quantization control parameters specific to joint chroma coded blocks can be used for both Cb and Cr channels instead of nominal chroma quantization parameters.

公开(公告)号：US12010309B2

公开(公告)日：2024-06-11

申请号：US17618090

申请日：2020-06-16

Applicant: INTERDIGITAL CE PATENT HOLDINGS, SAS

Inventor： Tangi Poirier ,  Fabrice Leleannec ,  Karam Naser ,  Edouard Francois

IPC: H04N19/12 ,  H04N19/176 ,  H04N19/182

CPC classification number: H04N19/12 ,  H04N19/176 ,  H04N19/182

Abstract: A lossless coding mode is proposed in a video coding system comprising a plurality of coding tools, some being lossy by design, some of which can be adapted to become lossless or near lossless. To enable a lossless mode in such system, it is proposed to disable the tools that are lossy by design and use only lossless tools, to adapt some tools to enable lossless coding, and adapt some tools to enable near-lossless coding so that a secondary lossless coding may be applied after residual coding. In a specific embodiment, it is proposed to determine the type of residual coding by, when an information indicates that a transform skip residual coding is used, obtaining a flag representative of a special mode, and when this flag is true, determine that regular residual coding must be used instead of the transform skip residual coding that should be used.

公开(公告)号：US12231620B2

公开(公告)日：2025-02-18

申请号：US17772061

申请日：2020-12-17

Applicant: InterDigital CE Patent Holdings, SAS

Inventor： Antoine Robert ,  Franck Galpin ,  Fabrice Leleannec ,  Gagan Rath

IPC: H04N19/105 ,  H04N19/129 ,  H04N19/176

Abstract: To encode a coding unit in the inter modes, there exist multiple inter modes that signal the motion information using a Motion Vector Predictor (MW) list. The MW lists for different coding modes include spatial predictors. In one embodiment, for all coding modes that use MVP lists, the top spatial predictor is first added to the motion vector predictor list before the left spatial predictor. In another embodiment, a subset of coding modes adds the top spatial predictor before the left spatial predictor, and another subset of coding modes adds the left spatial predictor before the top spatial predictor. For example, all merge modes add the top spatial predictor first, and all AMVP modes add the left spatial predictor first. In another example, all non-sub-block modes add the top spatial predictor first, and all sub-block modes add the left spatial predictor first.

公开(公告)号：US20250030898A1

公开(公告)日：2025-01-23

申请号：US18902363

申请日：2024-09-30

Applicant: InterDigital CE Patent Holdings, SAS

Inventor： Philippe Bordes ,  Antoine Robert ,  Fabrice Leleannec ,  Franck Galpin

IPC: H04N19/80 ,  H04N19/105 ,  H04N19/159 ,  H04N19/172

Abstract: Video processing such as encoding and/or decoding a picture can involve deriving an inter-prediction parameter based on first and second merge candidates used to generate a pairwise merge candidate, wherein the inter-prediction parameter comprises at least one of an index for weighted bi-prediction or an interpolation filter index; and encoding at least a portion of the picture information based on the inter-prediction parameter.

公开(公告)号：US12137228B2

公开(公告)日：2024-11-05

申请号：US17787533

申请日：2020-12-10

Applicant: INTERDIGITAL CE PATENT HOLDINGS, SAS

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

IPC: H04N19/139 ,  H04N19/105 ,  H04N19/132 ,  H04N19/176

Abstract: There is provided a method for estimating weighted prediction parameters intended to be used for predicting an image block.