公开(公告)号：US12231687B2

公开(公告)日：2025-02-18

申请号：US18021794

申请日：2021-09-23

Applicant: InterDigital CE Patent Holdings, SAS

Inventor： Karam Naser ,  Fabrice Le Leannec ,  Franck Galpin ,  Thierry Dumas

IPC: H04N19/61 ,  H04N19/176 ,  H04N19/625

Abstract: In one implementation, KLT transform matrices are derived during the encoding or decoding process. In particular, the KLT transform matrices can be derived for either the primary transforming stage or the secondary transforming stage, or both. Because the KLT transform matrices can be derived at both the encoder and decoder sides, the KLT transform matrices do not need to be signaled in the bitstream. To derive the KLT transform matrix for a current block to be encoded or decoded, a template for the current block is defined, and is used to search in reconstructed regions multiple blocks with templates similar to the current template. Those multiple blocks are used to train the KLT transform matrix.

公开(公告)号：US20250056004A1

公开(公告)日：2025-02-13

申请号：US18722933

申请日：2022-12-21

Applicant: InterDigital CE Patent Holdings, SAS

Inventor： Franck Galpin ,  Franck Aumont ,  Tangi Poirier ,  Gaëlle Martin-Cocher

IPC: H04N19/14 ,  H04N19/105 ,  H04N19/176

Abstract: Systems, methods, and instrumentalities are disclosed herein for the field of video compression. Examples herein aim at improving compression efficiency compared to existing video compression systems. In examples, a video coding device may identify a reference picture of a block (e.g., a current block). The reference picture may include a number of regions divided by a boundary. A motion compensated block associated with the current block) in the reference picture may be identified. Whether to use an inter prediction coding tool based on a position of the motion compensated block relative to the block is determined. The current block may be coded based on the determination of whether to use the inter prediction coding tool. For example, the number of regions may include a first region defining a clean area and a second region defining a dirty area in Gradual Decoding Refresh (GDR).

公开(公告)号：US20250055981A1

公开(公告)日：2025-02-13

申请号：US18721652

申请日：2022-12-12

Applicant: InterDigital CE Patent Holdings, SAS

Inventor： Karam Naser ,  Thierry Dumas ,  Ya Chen ,  Franck Galpin

IPC: H04N19/11 ,  H04N19/176 ,  H04N19/593

Abstract: Systems, methods, and instrumentalities are disclosed for most probable mode (MPM) list generation with template-based intra mode derivation (TIMD). An example method involves determining an intra coding mode derivation process is enabled for a first coding block; based on the intra coding mode derivation process being enabled for the first coding block, generating a first MPM list for the first coding block based on a first MPM list generation process; decoding the first coding block based on the first MPM list; determining that the intra coding mode derivation process is disabled for a second coding block; based on the intra coding mode derivation process being disabled for the second coding block, generating a second MPM list for the second coding block based on a second MPM list generation process, different from the first MPM list generation process; and decoding the second coding block based on the second MPM list.

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：US20240422329A1

公开(公告)日：2024-12-19

申请号：US18698862

申请日：2022-10-05

Applicant: INTERDIGITAL CE PATENT HOLDINGS, SAS

Inventor： Fabrice Le Leannec ,  Franck Galpin ,  Tangi Poirier

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

Abstract: A first device may be configured to perform actions. A coding block may be obtained. It may be determined whether an indication of transform unit (TU) transform information associated with the coding block is to be parsed based on a TU size of the transform tree node. Inverse transformation associated with the coding block may be performed based on the determination. A second device may be configured to determine a TU split for a coding unit based on depth information and perform transformation on the coding unit based on the determination. A third device may determine whether to include an indication of TU transform information in video data based on a TU size of coding block and may perform transformation associated with the coding block based on the determination.

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：US20240323367A1

公开(公告)日：2024-09-26

申请号：US18572299

申请日：2022-06-16

Applicant: InterDigital CE Patent Holdings, SAS

Inventor： Philippe Bordes ,  Franck Galpin ,  Thierry Dumas ,  Karam Naser

IPC: H04N19/117 ,  H04N19/186 ,  H04N19/30 ,  H04N19/82

CPC classification number: H04N19/117 ,  H04N19/186 ,  H04N19/30 ,  H04N19/82

Abstract: Methods and apparatuses for encoding/decoding a video are provided. A picture from a video is decoded from a bit-stream, the picture being encoded in the bitstream at a resolution that is lower than an original resolution of the picture. Decoding the picture further comprises up-sampling the decoded picture to the original resolution, and applying an adaptive filter to at least one component of the up-sampled decoded picture. According to some embodiments, the adaptive filter may be performed in-loop or out-of-loop of the decoding/encoding process.

公开(公告)号：US20250106428A1

公开(公告)日：2025-03-27

申请号：US18850870

申请日：2023-03-24

Applicant: InterDigital CE Patent Holdings, SAS

Inventor： Franck Galpin ,  Philippe Bordes ,  Guillaume Boisson ,  Tangi Poirier

IPC: H04N19/51 ,  H04N19/176

Abstract: A method and an apparatus for encoding or decoding a video are provided. At least one motion compensation interpolation filter for a block of the video is determined. In an embodiment, the length of the motion compensation interpolation filter is adapted based on block conditions. A prediction block is determined based on the at least one motion compensation interpolation filter and a reference block determined for the block and the block of the video is encoded or decoded based at least on the prediction block.

公开(公告)号：US12231619B2

公开(公告)日：2025-02-18

申请号：US17762922

申请日：2020-09-18

Applicant: INTERDIGITAL CE PATENT HOLDINGS, SAS

Inventor： Philippe Bordes ,  Didier Doyen ,  Franck Galpin ,  Michel Kerdranvat

IPC: H04N19/105 ,  H04N19/139 ,  H04N19/172 ,  H04N19/597

Abstract: Various embodiments relate to a video coding system in which some elements required for decoding are generated according to a process that not specified within the video coding system. This process is hereafter referenced to as being the “external” process. This external process may generate “external” reference pictures to be used by a decoder that is adapted to use these external pictures. Encoding method, decoding method, encoding apparatus, decoding apparatus based on this post-processing method are proposed.

公开(公告)号：US20250024067A1

公开(公告)日：2025-01-16

申请号：US18704640

申请日：2022-10-07

Applicant: InterDigital CE Patent Holdings, SAS

Inventor： Philippe Bordes ,  Tangi Poirier ,  Franck Galpin ,  Antoine Robert

IPC: H04N19/52 ,  H04N19/132 ,  H04N19/139 ,  H04N19/176 ,  H04N19/30

Abstract: In a video coding system, it is proposed to adapt video coding tools to the use of Reference Picture Re-scaling where a reference picture has a different size than the current picture to be coded or decoded. Different embodiments are proposed hereafter, introducing some tools modifications to increase coding efficiency and improve the codec consistency when RPR is enabled. A video encoding method, a decoding method, a video encoder and a video decoder are described.