公开(公告)号：US20250168388A1

公开(公告)日：2025-05-22

申请号：US19027404

申请日：2025-01-17

Applicant: InterDigital VC Holdings, Inc.

Inventor： Xiaoyu Xiu ,  Yuwen He ,  Yan Ye

IPC: H04N19/51 ,  H04N19/105 ,  H04N19/174 ,  H04N19/176 ,  H04N19/70

Abstract: Systems, methods, and instrumentalities for sub-block motion derivation and motion vector refinement for merge mode may be disclosed herein. Video data may be coded (e.g., encoded and/or decoded). A collocated picture for a current slice of the video data may be identified. The current slice may include one or more coding units (CUs). One or more neighboring CUs may be identified for a current CU. A neighboring CU (e.g., each neighboring CU) may correspond to a reference picture. A (e.g., one) neighboring CU may be selected to be a candidate neighboring CU based on the reference pictures and the collocated picture. A motion vector (MV) (e.g., collocated MV) may be identified from the collocated picture based on an MV (e.g., a reference MV) of the candidate neighboring CU. The current CU may be coded (e.g., encoded and/or decoded) using the collocated MV.

公开(公告)号：US12255945B2

公开(公告)日：2025-03-18

申请号：US18197323

申请日：2023-05-15

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Yong He ,  Yan Ye ,  Srinivas Gudumasu ,  Eduardo Asbun ,  Ahmed Hamza ,  Ali C. Begen

IPC: H04N13/111 ,  H04L65/612 ,  H04L65/65 ,  H04L65/70 ,  H04L65/75 ,  H04L65/80 ,  H04N21/218 ,  H04N21/2343 ,  H04N21/442 ,  H04N21/647 ,  H04N21/6587 ,  H04N21/81 ,  H04N21/845

Abstract: A client device adaptively streams a 360-degree video. A first segment is displayed based on a first viewing direction at a first time, where the first viewing direction is associated with a first viewport. The client requests a first base buffer segment based on the first viewport. The first base buffer segment has a presentation time after the first segment. At a second time, the viewing direction changes to a second viewing direction associated with a second viewport. The client requests, prior to the presentation time, a first viewport buffer segment based on the second viewport, with the same presentation time. The client device displays a second segment at the presentation time, wherein the second segment is either the first viewport buffer segment or the first base buffer segment. The client provides reports on viewport switching latency and on the most-requested segments.

公开(公告)号：US20240380892A1

公开(公告)日：2024-11-14

申请号：US18782868

申请日：2024-07-24

Applicant: InterDigital VC Holdings, Inc.

Inventor： Yuwen He ,  Xiaoyu Xiu ,  Yan Ye ,  Jiancong Luo

IPC: H04N19/137 ,  H04N19/159 ,  H04N19/176 ,  H04N19/192

Abstract: Systems and methods are described for video coding using affine motion models with adaptive precision. In an example, a block of video is encoded in a bitstream using an affine motion model, where the affine motion model is characterized by at least two motion vectors. A precision is selected for each of the motion vectors, and the selected precisions are signaled in the bitstream. In some embodiments, the precisions are signaled by including in the bitstream information that identifies one of a plurality of elements in a selected predetermined precision set. The identified element indicates the precision of each of the motion vectors that characterize the affine motion model. In some embodiments, the precision set to be used is signaled expressly in the bitstream; in other embodiments, the precision set may be inferred, e.g., from the block size, block shape or temporal layer.

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：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：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：US12284325B2

公开(公告)日：2025-04-22

申请号：US17892911

申请日：2022-08-22

Applicant: InterDigital VC Holdings, Inc.

Inventor： Philippe Hanhart ,  Yuwen He ,  Yan Ye

IPC: H04N13/161 ,  H04N19/172 ,  H04N19/186 ,  H04N19/593 ,  H04N19/597

Abstract: A video coding device may be configured to periodically select the frame packing configuration (e.g., face layout and/or face rotations parameters) associated with a RAS. The device may receive a plurality of pictures, which may each comprise a plurality of faces. The pictures may be grouped into a plurality of RASs. The device may select a frame packing configuration with the lowest cost for a first RAS. For example, the cost of a frame packing configuration may be determined based on the first picture of the first RAS. The device may select a frame packing configuration for a second RAS. The frame packing configuration for the first RAS may be different than the frame packing configuration for the second RAS. The frame packing configuration for the first RAS and the frame packing configuration for the second RAS may be signaled in the video bitstream.

公开(公告)号：US20250008154A1

公开(公告)日：2025-01-02

申请号：US18884059

申请日：2024-09-12

Applicant: InterDigital VC Holdings, Inc.

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

IPC: H04N19/583 ,  H04N19/139 ,  H04N19/176 ,  H04N19/189

Abstract: Overlapped block motion compensation (OBMC) may be performed for a current video block based on motion information associated with the current video block and motion information associated with one or more neighboring blocks of the current video block. Under certain conditions, some or all of these neighboring blocks may be omitted from the OBMC operation of the current block. For instance, a neighboring block may be skipped during the OBMC operation if the current video block and the neighboring block are both uni-directionally or bi-directionally predicted, if the motion vectors associated with the current block and the neighboring block refer to a same reference picture, and if a sum of absolute differences between those motion vectors is smaller than a threshold value. Further, OBMC may be conducted in conjunction with regular motion compensation and may use simplified filters than traditionally allowed.

公开(公告)号：US20250039408A1

公开(公告)日：2025-01-30

申请号：US18913507

申请日：2024-10-11

Applicant: InterDigital VC Holdings, Inc.

Inventor： Xiaoyu Xiu ,  Yan Ye ,  Yuwen He

IPC: H04N19/176 ,  H04N19/126 ,  H04N19/184 ,  H04N19/186 ,  H04N19/593

Abstract: A video block of a current picture may be coded in an intra block copy (IBC) mode. Weighted prediction may be disabled for the IBC-coded screen content video block. Fractional block vectors may be used for the chroma components of the IBC-coded video block. An interpolation filter may be utilized to generate chroma prediction samples for the video block. A decoded version of the current reference picture may be added to both reference picture list L0 and reference picture list L1 that are associated with the IBC-coded video block. When constrained intra prediction is applied, reference samples that may be used to predict an intra-coded video block may be limited to those in intra-coded neighboring blocks. The range of IBC searches may be restricted by imposing a maximum absolute value for block vectors.