公开(公告)号：US20250063172A1

公开(公告)日：2025-02-20

申请号：US18502003

申请日：2023-11-04

Applicant: Tencent America LLC

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

IPC: H04N19/132 ,  H04N19/124 ,  H04N19/70

Abstract: The various implementations described herein include methods and systems for coding video. In one aspect, a method includes receiving a video bitstream that includes encoded video data and one or more syntax elements indicating one or more clipping ranges. The method includes deriving, based on the one or more syntax elements, the one or more clipping ranges for a portion of the encoded video data. Each of the one or more clipping ranges modifies a range of sample values of the received video bitstream. The method includes performing one or more clipping operations on the encoded video data using the derived one or more clipping ranges.

公开(公告)号：US20250063157A1

公开(公告)日：2025-02-20

申请号：US18936602

申请日：2024-11-04

Applicant: Tencent America LLC

Inventor： Lien-Fei CHEN ,  Xiang LI ,  Ling LI ,  Shan LIU

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/172 ,  H04N19/176

Abstract: In a method of video decoding, coded information of a current block in a current picture of a video is received from a coded video bitstream. The coded information indicates that the current block is an intra block copy (IBC) block. The current block is divided into a plurality of partitions based on a geometric partition mode (GPM). An intra prediction mode for a subblock is derived from one of the plurality of partitions as an intra mode of a pixel positioned at a location of a reference subblock in a reference block referenced by a block vector of the IBC block. The intra prediction mode for the subblock is stored. A neighboring block of the current block is determined as an IBC block. A most probable mode (MPM) list for the neighboring block is constructed using the stored intra prediction mode for the subblock of the current block.

公开(公告)号：US20250055992A1

公开(公告)日：2025-02-13

申请号：US18929418

申请日：2024-10-28

Applicant: Tencent America LLC

Inventor： Yixin DU ,  Liang ZHAO ,  Xin ZHAO ,  Shan LIU

IPC: H04N19/117 ,  H04N19/139 ,  H04N19/176 ,  H04N19/186 ,  H04N19/44

Abstract: An example method of video decoding includes receiving a video bitstream comprising a plurality of frames, including a current frame having a chroma component and a luma component. When a semi-decoupled partitioning (SDP) mode is enabled for the current frame, the method includes parsing one or more parameters of a first constrained directional enhancement filter (CDEF) process from the video bitstream, applying the first CDEF process to the chroma component of the current frame according to the one or more parameters, parsing one or more second parameters of a second CDEF process from the video bitstream, applying the second CDEF process to the luma component of the current frame according to the one or more second parameters, and reconstructing the current frame in accordance with the first CDEF process and the second CDEF process. In this example, the second CDEF process is separate from the first CDEF process.

公开(公告)号：US20250047907A1

公开(公告)日：2025-02-06

申请号：US18922219

申请日：2024-10-21

Applicant: Tencent America LLC

Inventor： Yixin DU ,  Xin ZHAO ,  Shan LIU

IPC: H04N19/80 ,  H04N19/103 ,  H04N19/117 ,  H04N19/132 ,  H04N19/136 ,  H04N19/184 ,  H04N19/70

Abstract: Aspects of the disclosure provide methods and apparatuses for video encoding/decoding. An example method of video decoding includes receiving a video bitstream and reconstructing a first sample of the video bitstream using a non-linear mapping-based filter with a first filter shape configuration of a plurality of filter shape configurations. The plurality of filter shape configurations includes at least two filter shape configurations that are based on a same geometric shape and include a same number of filter taps, and the filter taps of the at least two filter shape configurations are located at different positions. The method further includes selecting a second filter shape configuration of the plurality of filter shape configurations, and reconstructing a second sample in the video based on the non-linear mapping-based filter with the second filter shape configuration.

公开(公告)号：US20250047862A1

公开(公告)日：2025-02-06

申请号：US18920706

申请日：2024-10-18

Applicant: Tencent America LLC

Inventor： Liang ZHAO ,  Xin ZHAO ,  Shan LIU

IPC: H04N19/137 ,  H04N19/105 ,  H04N19/139 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46 ,  H04N19/52 ,  H04N19/59 ,  H04N19/70

Abstract: This disclosure relates to signaling, parsing, and using adaptive resolution for motion vector difference in video coding. An example method includes receiving a video bitstream and extracting an inter-prediction syntax element from the video bitstream. The inter-prediction syntax element indicates which single-reference inter-prediction mode is enabled for one or more video blocks of the video bitstream. The method further includes determining whether an adaptive motion vector difference (MVD) mode is enabled for the one or more video blocks. The adaptive MVD mode is a single-reference inter-prediction mode with an adaptive MVD pixel resolution. When the adaptive MVD mode is enabled for the one or more video blocks, the method includes selecting a current MVD pixel resolution from a set of available MVD pixel resolutions. The method also includes decoding the one or more video blocks based on the current MVD pixel resolution.

公开(公告)号：US20250039455A1

公开(公告)日：2025-01-30

申请号：US18916112

申请日：2024-10-15

Applicant: Tencent America LLC

Inventor： Xin ZHAO ,  Sehoon YEA ,  Shan LIU

IPC: H04N19/61 ,  H04N19/44 ,  H04N19/70 ,  H04N19/91

Abstract: An example method of decoding an encoded video bitstream using at least one processor includes obtaining an encoded video bitstream, the encoded video bitstream including encoded color components. The method also includes entropy parsing the encoded color components and dequantizing the color components and obtaining transform coefficients of the color components. The method further includes applying a joint components secondary transform (JCST) on the transform coefficients of the color components, thereby generating JCST outputs. The method also includes performing a backward transform on the JCST outputs, thereby obtaining residual components of the color components; and decoding the encoded video bitstream based on the residual components of the color components.

公开(公告)号：US20250039387A1

公开(公告)日：2025-01-30

申请号：US18676147

申请日：2024-05-28

Applicant: Tencent America LLC

Inventor： Shan LIU ,  Ding DING

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

Abstract: This disclosure relates generally to video coding/decoding and particularly for signaling in temporal resampling and restoration in video coding and/or decoding systems. One method includes receiving the coded video bitstream; extracting, from the coded video bitstream, a syntax indicating a temporal restoration mode, wherein the syntax comprises: a flag and an index, the flag indicating whether temporal restoration is enabled, the index indicating one temporal resampling ratio out of 2{circumflex over ( )}N non-unity temporal resampling ratios, wherein the index has N bits, or an index only, the index indicating whether the temporal restoration is enabled and one temporal resampling ratio of at least one temporal resampling ratios; and when the temporal restoration is enabled, restoring, by the device, reconstructed frames to obtain restored frames based on the indicated temporal resampling ratio.

公开(公告)号：US20250030884A1

公开(公告)日：2025-01-23

申请号：US18905997

申请日：2024-10-03

Applicant: Tencent America LLC

Inventor： Xiaozhong XU ,  Xiang LI ,  Shan LIU

IPC: H04N19/513 ,  H04N19/14 ,  H04N19/176 ,  H04N19/196

Abstract: Aspects of the disclosure provide methods and apparatuses for video encoding/decoding. In some examples, an apparatus for video encoding includes processing circuitry. The processing circuitry determines whether a current block in a current picture is a small block based on a block size threshold. The processing circuitry constructs a motion vector predictor list for the current block based on whether the current block is the small block, at least one redundancy check with a motion vector candidate in the motion vector predictor list being performed in the construction of the motion vector predictor list based on whether the current block is the small block. The processing circuitry encodes the current block based on the constructed motion vector predictor list.

公开(公告)号：US20250024066A1

公开(公告)日：2025-01-16

申请号：US18899595

申请日：2024-09-27

Applicant: TENCENT AMERICA LLC

Inventor： Xin ZHAO ,  Guichun LI ,  Lien-Fei CHEN ,  Shan LIU

IPC: H04N19/513 ,  H04N19/103 ,  H04N19/176 ,  H04N19/184

Abstract: Method, apparatus, and non-transitory storage medium for coding and decoding video data using temporal motion vector prediction (TMVP) is provided. The method may include receiving video bitstream comprising one or more pictures; determining that the one or more pictures are to be predicted in a regular merge mode or an adaptive motion vector prediction (AMVP) mode. A displacement vector associated with a current block in a current picture is obtained, the displacement vector being signaled in the video bitstream to identify a reference block in the current picture. A TMVP candidate list comprising the motion information is generated and a motion vector for the current block using the TMVP candidate list is derived. Then the current block is decoded using the derived motion vector for prediction in the regular merge mode or the adaptive motion vector prediction (AMVP) mode.

公开(公告)号：US20250024057A1

公开(公告)日：2025-01-16

申请号：US18769745

申请日：2024-07-11

Applicant: Tencent America LLC

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

IPC: H04N19/44 ,  H04N19/119 ,  H04N19/129 ,  H04N19/597

Abstract: A method and apparatus comprising computer code configured to cause a processor or processors to obtain, from a bitstream, a mesh representing an encoded volumetric data of at least one three-dimensional (3D) visual content; partition a plurality of vertices of the mesh into a plurality of groups; and decode the encoded volumetric data by predicting the vertices in each group of the plurality of groups based on a plurality of traversal orders depending on an adaptive reference vertex of the vertices, and the plurality of traversal orders includes a first order from the adaptive reference vertex to a first alternative reference vertex of the vertices, and wherein the plurality of traversal orders includes a second order from the adaptive reference vertices to a second alternative reference vertex of the vertices.