公开(公告)号：US20250157083A1

公开(公告)日：2025-05-15

申请号：US18923657

申请日：2024-10-22

Applicant: Tencent America LLC

Inventor： Chao HUANG ,  Thuong NGUYEN CANH ,  Xiaozhong XU ,  Shan LIU

IPC: G06T9/00

Abstract: A bitstream that includes attribute information of a plurality of UV vertices corresponding to a mesh is received. A seam vertex queue that includes one or more UV vertices of the plurality of UV vertices is generated. Each of the one or more UV vertices in the seam vertex queue belongs to a respective UV vertex group of a plurality of seam UV vertex groups. Each of the plurality of seam UV vertex groups corresponds to a same three-dimensional (3D) vertex of the mesh in a 3D space. An initial UV vertex of the mesh is determined based on whether one of the one or more UV vertices in the seam vertex queue includes an unvisited UV vertex. UV coordinates of the mesh are reconstructed based on the initial UV vertex.

公开(公告)号：US20250150586A1

公开(公告)日：2025-05-08

申请号：US18923624

申请日：2024-10-22

Applicant: Tencent America LLC

Inventor： Yonguk YOON ,  Shan LIU ,  Roman CHERNYAK ,  Biao WANG ,  Lien-Fei CHEN ,  Motong XU ,  Xin ZHAO ,  Ziyue XIANG

IPC: H04N19/119 ,  H04N19/176 ,  H04N19/46

Abstract: A video bitstream including coded information of a current block in a current picture is received. The current block is divided into a plurality of subblocks based on a region division shape of a plurality of region division shapes that is associated with an intra prediction mode of the current block. A weight set is determined for each of the plurality of subblocks, where the weight set includes a first weight for an intra prediction of the respective subblock and a second weight for an inter prediction of the respective subblock. Each of the plurality of subblocks is reconstructed based on the weight set, the intra prediction, and the inter prediction that are associated with the respective subblock.

公开(公告)号：US20250150578A1

公开(公告)日：2025-05-08

申请号：US19016699

申请日：2025-01-10

Applicant: TENCENT AMERICA LLC

Inventor： Madhu Peringassery KRISHNAN ,  Xin ZHAO ,  Liang ZHAO ,  Han GAO ,  Xiaozhong XU ,  Shan LIU

IPC: H04N19/105 ,  H04N19/137 ,  H04N19/172 ,  H04N19/176 ,  H04N19/46

Abstract: A method includes receiving a current picture, a first reference picture, and a second reference picture. The method includes obtaining a plurality of predefined weighting patterns, each weighting pattern being signaled as an index value and selecting a weighting pattern based on a predetermined condition. The method includes deriving a first weight to be applied to a first sub-block in the first reference picture and a second weight to be applied to a second sub-block in the second reference picture based on the index value corresponding to the selected weighting pattern. The method includes assigning the first weight to the first sub-block and the second weight to the second sub-block based on the selected weighting pattern. The method includes decoding the current block by a weighted bi-prediction based at least on the first sub-block weighted by the first weight and the second sub-block weighted by the second weight.

公开(公告)号：US20250142103A1

公开(公告)日：2025-05-01

申请号：US19011256

申请日：2025-01-06

Applicant: Tencent America LLC

Inventor： Byeongdoo CHOI ,  Shan LIU ,  Stephan WENGER

IPC: H04N19/44 ,  H04N19/169 ,  H04N19/172 ,  H04N19/46

Abstract: A method of decoding an encoded video bitstream using at least one processor includes obtaining a video coding layer (VCL) network abstraction layer (NAL) unit; determining whether the VCL NAL unit is a first VCL NAL unit of a picture unit (PU) containing the VCL NAL unit; based on determining that the VCL NAL unit is the first VCL NAL unit of the PU, determining whether the VCL NAL unit is a first VCL NAL unit of an access unit (AU) containing the PU; and based on determining that the VCL NAL unit is the first VCL NAL unit of the AU, decoding the AU based on the VCL NAL unit.

公开(公告)号：US20250126270A1

公开(公告)日：2025-04-17

申请号：US18912561

申请日：2024-10-10

Applicant: Tencent America LLC

Inventor： Biao WANG ,  Lien-Fei CHEN ,  Roman CHERNYAK ,  Xin ZHAO ,  Shan LIU

IPC: H04N19/159 ,  H04N19/132 ,  H04N19/176 ,  H04N19/70

Abstract: Aspects of the disclosure includes methods and apparatuses for video decoding and video encoding and a method of processing visual media data. A current block in a first coding tree unit (CTU) is predicted using samples in a current picture. The first CTU and a second CTU are processed in parallel. The method for video decoding includes determining one of (i) a reference block of the current block in an allowed search range that is constrained for parallel processing of the first CTU and the second CTU in the current picture and (ii) an intra prediction mode of the current block based on a template adjacent to the current block that is constrained for parallel processing of the first CTU and the second CTU, and reconstructing the current block using the one of (i) the reference block and (ii) the intra prediction mode.

公开(公告)号：US20250119583A1

公开(公告)日：2025-04-10

申请号：US18480973

申请日：2023-10-04

Applicant: Tencent America LLC

Inventor： Tianqi LIU ,  Liang ZHAO ,  Xin ZHAO ,  Jing YE ,  Han GAO ,  Shan LIU

IPC: H04N19/61 ,  H04N19/12 ,  H04N19/159 ,  H04N19/176 ,  H04N19/70

Abstract: The various implementations described herein include methods and systems for coding video. In one aspect, a method of video decoding includes receiving video data including a first block and a syntax element, from a video bitstream, where the syntax element is signaled at a first processing unit level. The method further includes selecting a transform coding mode based on the syntax element and performing a transform process for the first block using the selected transform coding mode, where the transform process is performed on a transform block at a second processing unit level, and where the second processing unit level is not signaled (e.g., is inferred from coded information).

公开(公告)号：US20250119576A1

公开(公告)日：2025-04-10

申请号：US18480966

申请日：2023-10-04

Applicant: Tencent America LLC

Inventor： Tianqi LIU ,  Liang ZHAO ,  Xin ZHAO ,  Jing YE ,  Han GAO ,  Shan LIU

IPC: H04N19/593 ,  H04N19/176 ,  H04N19/91

Abstract: The various implementations described herein include methods and systems for coding video. In one aspect, a method of video decoding includes receiving video data comprising a plurality of blocks, including a first block and a plurality of residual coefficients, from a video bitstream. The first block is encoded by applying a first intra prediction. The plurality of residual coefficients are generated by applying a second intra prediction to a residue block for the first block in a first direction. The residue block generated from applying the first intra prediction mode to the first block in a second direction. The method also includes generating, from the plurality of residual coefficients, a refined residue block for the first block, and reconstructing the first block using the refined residue block.

公开(公告)号：US20250113031A1

公开(公告)日：2025-04-03

申请号：US18896460

申请日：2024-09-25

Applicant: Tencent America LLC

Inventor： Motong XU ,  Roman CHERNYAK ,  Xin ZHAO ,  Madhu PERINGASSERY KRISHNAN ,  Biao WANG ,  Lien-Fei CHEN ,  Yonguk YOON ,  Shan LIU

IPC: H04N19/124 ,  H04N19/176 ,  H04N19/18

Abstract: A method of video decoding includes receiving a bitstream that comprises coded information of a current block, the coded information of the current block includes coded bits of quantized transform coefficients in a transform domain of the current block, the coded information is also indicative of at least a scaling factor to be used during a dequantization of the quantized transform coefficients. The method also includes determining one or more quantization shifting offsets for a reconstruction of transform coefficients in the transform domain based on at least the scaling factor, reconstructing the transform coefficients from the quantized transform coefficients based on the one or more quantization shifting offsets, calculating residuals in a spatial domain of the current block based on the transform coefficients in the transform domain, and reconstructing the current block according to the residuals in the spatial domain.

公开(公告)号：US20250080763A1

公开(公告)日：2025-03-06

申请号：US18497915

申请日：2023-10-30

Applicant: Tencent America LLC

Inventor： Jing YE ,  Xin ZHAO ,  Liang ZHAO ,  Han GAO ,  Shan LIU

IPC: H04N19/44 ,  H04N19/105 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70

Abstract: The various implementations described herein include methods and systems for coding video. In one aspect, a video bitstream includes a current coding block of an image frame and signals a cross-component intra prediction mode and a hypothesis tap index. An computing system identifies a first luma sample and a first chroma sample co-located with the first luma sample in the current coding block, and selects one of a plurality of hypothesis tap combinations based on the hypothesis tap index. The computing system identifies neighboring luma samples of the first luma sample based on the selected hypothesis tap combinations, and generates hypothesis values based on the identified neighboring luma samples of the first luma sample. The computing system further generates the first chroma sample based on at least the first luma sample and the hypothesis values, and reconstructs the current coding block including the first chroma sample.

公开(公告)号：US20250063184A1

公开(公告)日：2025-02-20

申请号：US18519775

申请日：2023-11-27

Applicant: Tencent America LLC

Inventor： Liang ZHAO ,  Xin ZHAO ,  Biao WANG ,  Han GAO ,  Jing YE ,  Shan LIU

IPC: H04N19/44 ,  H04N19/105 ,  H04N19/176 ,  H04N19/70

Abstract: This disclosure relates generally to video coding/decoding and particularly for enhancing block adaptive weighted prediction (BAWP) with a block vector. One method includes receiving a coded video bitstream; identifying, from the coded video bitstream, a block vector corresponding to a reference block associated with the current block of the current frame; determining a scaling factor based on a syntax explicitly signaled in the coded video bitstream; generating a predicted block based on the reference block according to a linear equation associated with the scaling factor; and reconstructing, by the device, the current block based on the predicted block.