公开(公告)号：US12238275B2

公开(公告)日：2025-02-25

申请号：US17945714

申请日：2022-09-15

Applicant: InterDigital VC Holdings, Inc.

Inventor： Yan Ye ,  Yong He

IPC: H04N19/105 ,  H04N19/103 ,  H04N19/117 ,  H04N19/124 ,  H04N19/13 ,  H04N19/139 ,  H04N19/15 ,  H04N19/503 ,  H04N19/577 ,  H04N19/61 ,  H04N19/70 ,  H04N19/172

Abstract: Improved method and apparatus for signaling of reference pictures used for temporal prediction. The signaling schemes and construction process for different reference picture lists in HEVC Working Draft 5 (WD5) are improved.

公开(公告)号：US12231648B2

公开(公告)日：2025-02-18

申请号：US18417274

申请日：2024-01-19

Applicant: InterDigital VC Holdings, Inc.

Inventor： Saurav Bandyopadhyay ,  Xiaoyu Xiu ,  Yuwen He

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/176 ,  H04N19/186

Abstract: Procedures, methods, architectures, apparatuses, systems, devices, and computer program products directed to improved linear model estimation for template-based video coding are provided. Included therein is a method comprising determining minimum and maximum (“min/max”) values of luma and chroma samples neighboring a coding block, wherein the min/max chroma values correspond to the min/max luma values; determining a first linear model parameter of a template-based video coding technique (i) based on a single look-up table and the min/max chroma values and (ii) at a precision no greater than 16 bits; determining a second linear model parameter of the template-based video coding technique (i) based on the first linear model parameter and the minimum chroma and luma values and (ii) at a precision no greater than 16 bits; and predicting chroma samples of the coding block based on reconstructed luma samples of the coding block and the first and second linear model parameters.

公开(公告)号：US20250056038A1

公开(公告)日：2025-02-13

申请号：US18921599

申请日：2024-10-21

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Yan Zhang ,  Xiaoyu Xiu ,  Yuwen He ,  Yan Ye

IPC: H04N19/577 ,  H04N19/176 ,  H04N19/31 ,  H04N19/573

Abstract: Exemplary embodiments include systems and methods for coding a video comprising a plurality of pictures including a current picture, a first reference picture, and a second reference picture, where each picture includes a plurality of blocks. In one method, for at least a current block in the current picture, a number of available bi-prediction weights is determined based at least in part on a temporal layer and/or a quantization parameter of the current picture. From among available bi-prediction weights a pair of weights are identified. Using the identified weights, the current block is then predicted as a weighted sum of a first reference block in the first reference picture and a second reference block in the second reference picture. Encoding techniques are also described for efficient searching and selection of a pair of bi-prediction weights to use for prediction of a block.

公开(公告)号：US20250039435A1

公开(公告)日：2025-01-30

申请号：US18911319

申请日：2024-10-10

Applicant: InterDigital VC Holdings, Inc.

Inventor： Jiancong LUO ,  Yuwen HE

IPC: H04N19/52 ,  H04N19/105 ,  H04N19/132 ,  H04N19/139 ,  H04N19/167 ,  H04N19/176 ,  H04N19/55

Abstract: Method, apparatus and systems are disclosed. In one embodiment, a method of decoding includes obtaining a sub-block based motion prediction signal for a current block of the video; obtaining one or more spatial gradients of the sub-block based motion prediction signal or one or more motion vector difference values; obtaining a refinement signal for the current block based on the one or more obtained spatial gradients or the one or more obtained motion vector difference values; obtaining a refined motion prediction signal for the current block based on the sub-block based motion prediction signal and the refinement signal; and decoding the current block based on the refined motion prediction signal.

公开(公告)号：US12200190B2

公开(公告)日：2025-01-14

申请号：US17763024

申请日：2020-09-23

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Wei Chen ,  Yuwen He ,  Hua Yang

IPC: H04N19/105 ,  H04N19/117 ,  H04N19/132 ,  H04N19/137 ,  H04N19/176

Abstract: An apparatus may be configured to determine a reference picture listed in a first reference picture list and a reference picture listed in a second reference picture list, for a coding block. The apparatus may be configured to determine whether to perform bi-directional optical flow (BDOF) for the coding block based at least in part on whether a distance between a picture associated with the coding block and the reference picture listed in the first reference picture list differs from a distance between the picture associated with the coding block and the reference picture listed in the second reference picture list. The apparatus may be configured to decode the coding block based on the determination of whether to perform BDOF for the coding block.

公开(公告)号：US20240430433A1

公开(公告)日：2024-12-26

申请号：US18830023

申请日：2024-09-10

Applicant: InterDigital VC Holdings, Inc.

Inventor： Yunfei Zheng ,  Qian Xu ,  Xiaoan Lu ,  Peng Yin ,  Joel Sole Rojals ,  Adeel Abbas

IPC: H04N19/136 ,  H04N19/11 ,  H04N19/147 ,  H04N19/157 ,  H04N19/159 ,  H04N19/176 ,  H04N19/196 ,  H04N19/46 ,  H04N19/463 ,  H04N19/593 ,  H04N19/70 ,  H04N19/96

Abstract: Methods and apparatus are provided for signaling intra prediction for large blocks for video encoders and decoders. An apparatus includes a video encoder for encoding picture data for at least one large block in a picture by signaling intra prediction for the at least one large block. The intra prediction is signaled by selecting a basic coding unit size and assigning a single spatial intra partition type for the basic coding unit size. The single spatial intra partition type is selectable from among a plurality of spatial intra partition types. The at least one large block has a large block size greater than a basic coding unit size. The intra prediction may be performed for the at least one large block by at least one of splitting from the large block size to the basic coding unit size.

公开(公告)号：US12167035B2

公开(公告)日：2024-12-10

申请号：US18112234

申请日：2023-02-21

Applicant: InterDigital VC Holdings, Inc.

Inventor： Xiaoyu Xiu ,  Yuwen He ,  Yan Ye

IPC: H04N19/597 ,  G06T3/00 ,  G06T3/16 ,  H04N19/12 ,  H04N19/61

Abstract: A system, method, and/or instrumentality may be provided for coding a 360-degree video. A picture of the 360-degree video may be received. The picture may include one or more faces associated with one or more projection formats. A first projection format indication may be received that indicates a first projection format may be associated with a first face. A second projection format indication may be received that indicates a second projection format may be associated with a second face. Based on the first projection format, a first transform function associated with the first face may be determined. Based on the second projection format, a second transform function associated with the second face may be determined. At least one decoding process may be performed on the first face using the first transform function and/or at least one decoding process may be performed on the second face using the second transform function.

公开(公告)号：US12160555B2

公开(公告)日：2024-12-03

申请号：US17629242

申请日：2020-07-14

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Bertrand Chupeau ,  Gérard Briand ,  Renaud Dore

IPC: H04N13/178 ,  H04N13/161 ,  H04N13/194

Abstract: Methods, devices and data stream are provided for signaling and decoding information representative of restrictions of navigation in a volumetric video. The data stream comprises metadata associated to video data representative of the volumetric video. The metadata comprise data representative of a viewing bounding box, data representative of a curvilinear path in the 3D space of said volumetric video; and data representative of at least one viewing direction range associated with a point on the curvilinear path.

公开(公告)号：US12143637B2

公开(公告)日：2024-11-12

申请号：US18539475

申请日：2023-12-14

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Fabrice Leleannec ,  Franck Galpin ,  Tangi Poirier

IPC: H04N19/61 ,  H04N19/105 ,  H04N19/119 ,  H04N19/13 ,  H04N19/176

Abstract: A coding unit having a size multiple of three in horizontal or vertical direction is coded through one of several embodiments. In one embodiment, for some block sizes, the coding unit is coded and decoded systematically through SKIP mode. In another embodiment, the coding units can be coded in SKIP mode or with a DC coefficient. In another embodiment, an asymmetric division of a common coding unit parent is performed and transform coefficients are factorized among at least two sub-blocks to encode a coding unit. In another embodiment, a separable two dimensional transform can be applied by applying a transform over the block in one direction, and using two one-dimensional transforms on sub-blocks in the other direction to code. Methods, apparatus, and signal embodiments are provided for encoding and decoding.

公开(公告)号：US12136243B2

公开(公告)日：2024-11-05

申请号：US17439707

申请日：2020-01-27

Applicant: InterDigital VC Holdings, Inc.

Inventor： Joan Llach ,  Celine Guede ,  Jean-Claude Chevet

IPC: G06T9/00

Abstract: At least one embodiment relates to a method assigning a pixel value of an occupancy map either indicates that a depth value of at least one 3D sample of a point cloud frame projected along a same projection line is stored as a pixel value of at least one layer or equals a fixed-length codeword representing a depth value of at least one 3D sample projection along said projection line.