公开(公告)号：US20240267518A1

公开(公告)日：2024-08-08

申请号：US18244833

申请日：2023-09-11

Applicant: Tencent America LLC

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

IPC: H04N19/119 ,  H04N19/159 ,  H04N19/176 ,  H04N19/70

CPC classification number: H04N19/119 ,  H04N19/159 ,  H04N19/176 ,  H04N19/70 ,  H04N19/503 ,  H04N19/593

Abstract: The various implementations described herein include methods and systems for encoding and decoding video. In one aspect, a method of video decoding includes receiving video data that includes a first block that is partitioned into a first section and a second section, from a video bitstream. The method further includes identifying a prediction mode for the first block from a syntax element of the video bitstream. In accordance with the prediction mode being a partition-based inter-intra prediction mode wherein the first section is associated with an inter prediction mode and the second section is associated with an intra prediction mode, the first section is blended using a first blending mask and the second section is blended using a second blending mask, the second blending mask being different than the first blending mask. The method also includes decoding the first block using the blended first and second sections.

公开(公告)号：US20240073406A1

公开(公告)日：2024-02-29

申请号：US18051397

申请日：2022-10-31

Applicant: TENCENT AMERICA LLC

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

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

CPC classification number: H04N19/105 ,  H04N19/159 ,  H04N19/176

Abstract: This disclosure relates generally to video coding and particularly to methods and systems for determination of temporal motion vector predictor (TMVP) candidates for inter-prediction in video coding. The disclosed methods, for example, include restricting the number of TMVP candidates in a motion vector predictor (MVP) list and provide various search mechanism in order to promote MVP candidate diversity among TMVP and other types of MVP candidates and to improve coding efficiency.

公开(公告)号：US20240031596A1

公开(公告)日：2024-01-25

申请号：US18195888

申请日：2023-05-10

Applicant: Tencent America LLC

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

IPC: H04N19/52 ,  H04N19/176 ,  H04N19/70 ,  H04N19/159

CPC classification number: H04N19/52 ,  H04N19/176 ,  H04N19/70 ,  H04N19/159

Abstract: The various implementations described herein include methods and systems for coding video. In one aspect, a method includes receiving a video bitstream including a current coding block in a current image frame, obtaining a syntax element value, and determining whether the current coding block is coded with a warped motion mode or a translational motion mode based on the syntax element value. The method further includes in accordance with a determination that the current coding block is coded with the warped motion mode, selecting a first motion vector difference (MVD) setting for the current coding block; in accordance with a determination that the current coding block is coded with the translational motion mode, selecting a second MVD setting distinct from the second MVD setting for the current coding block; and reconstructing the current coding block based at least in part on the selected MVD setting for the current coding block.

公开(公告)号：US20240031594A1

公开(公告)日：2024-01-25

申请号：US17982946

申请日：2022-11-08

Applicant: TENCENT AMERICA LLC

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

IPC: H04N19/52 ,  H04N19/172 ,  H04N19/176 ,  H04N19/139 ,  H04N19/30 ,  H04N19/46

CPC classification number: H04N19/52 ,  H04N19/172 ,  H04N19/176 ,  H04N19/139 ,  H04N19/30 ,  H04N19/46

Abstract: A method performed by a video decoder includes receiving a coded video bitstream including a current picture, a first reference picture, a second reference picture, and a joint motion vector difference (JMVD) associated with at least one block in the current picture. The method includes determining whether one or more scaling factors are used for an adaptive motion vector difference resolution (AMVD) based JMVD based on a predetermined condition. The method includes, in response to determining the one or more scaling factors are used for the AMVD based JMVD, scaling the JMVD based on the one or more scaling factors. The method includes deriving a first MVD for the first reference picture based on the scaled JMVD. The method includes deriving a second MVD for the second reference picture based on the derived first MVD. The method includes reconstructing the at least one block based on the derived first MVD and the derived second MVD.

公开(公告)号：US20240022756A1

公开(公告)日：2024-01-18

申请号：US17980125

申请日：2022-11-03

Applicant: TENCENT AMERICA LLC

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

IPC: H04N19/513 ,  H04N19/70 ,  H04N19/176

CPC classification number: H04N19/513 ,  H04N19/70 ,  H04N19/176

Abstract: An approach for encoding/decoding video data, performed by at least one processor, may include: obtaining a coded video bitstream; obtaining a plurality of blocks from the video bitstream, wherein the plurality of blocks comprise a current block and one or more neighboring blocks; determining, based a syntax element in the video bitstream, that a warp delta mode is used to predict the current block; determining positions and motion vectors of the one or more neighboring blocks; generating a first warp model of the current block based on motion vectors of the one or more neighboring blocks; selecting a warp model from among the first warp model of the current block and a second warp model associated with one of the one or more neighboring blocks as a base model of a coding mode; and decoding the plurality of blocks in the coding mode based on the base model.

公开(公告)号：US20230412794A1

公开(公告)日：2023-12-21

申请号：US17982938

申请日：2022-11-08

Applicant: Tencent America LLC

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

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/137 ,  H04N19/88 ,  H04N19/176 ,  H04N19/46

CPC classification number: H04N19/105 ,  H04N19/132 ,  H04N19/137 ,  H04N19/88 ,  H04N19/176 ,  H04N19/46

Abstract: In some examples, an apparatus for video decoding includes processing circuitry. The processing circuitry determines, from a candidate list, a first affine-translational merge candidate for a prediction of a current block in a current picture. The first affine-translational merge candidate provides affine motion information associated with a first reference picture in a first reference list and translational motion information associated with a second reference picture in a second reference list. The processing circuitry generates a first prediction for a sample in the current block according to the affine motion information associated with the first reference picture, and generates a second prediction for the sample in the current block according to the translational motion information associated with the second reference picture. The processing circuitry reconstructs the sample of the current block according to a combination of the first prediction and the second prediction.

公开(公告)号：US20250159207A1

公开(公告)日：2025-05-15

申请号：US18633360

申请日：2024-04-11

Applicant: Tencent America LLC.

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

IPC: H04N19/176 ,  H04N19/159 ,  H04N19/186 ,  H04N19/66

Abstract: An example method of video coding includes receiving a video bitstream for a plurality of coding blocks. The method also includes identifying, based on a first indicator in the video bitstream, a coding region that includes two or more coding blocks of the plurality of coding blocks, where each coding block in the coding region is encoded in an intra prediction mode. The method further includes applying a first partitioning for luma blocks in the coding region, applying a second partitioning for chroma blocks in the coding region, where the second partitioning is different from the first partitioning, and reconstructing the two or more coding blocks of the coding region using the first partitioning and the second partitioning.

公开(公告)号：US20250142071A1

公开(公告)日：2025-05-01

申请号：US18669375

申请日：2024-05-20

Applicant: Tencent America LLC

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

IPC: H04N19/129 ,  H04N19/105 ,  H04N19/176

Abstract: An example method of video coding includes receiving a video bitstream that includes a plurality of blocks. The method also includes determining a scanning order for a motion vector list for a first block of the plurality of blocks based on one or more of: a number of neighboring blocks of the current block with corresponding temporal motion vectors, a number of neighboring blocks of the current block encoded in an inter prediction mode, a mode of the current block, and a reference frame index for the current block. The method further includes generating the motion vector list according to the scanning order and identifying, from the motion vector list, a motion vector predictor for the current block. The method also includes decoding the current block using the identified motion vector predictor.

公开(公告)号：US20250106404A1

公开(公告)日：2025-03-27

申请号：US18633217

申请日：2024-04-11

Applicant: TENCENT AMERICA LLC

Inventor： Liang ZHAO ,  Xin ZHAO ,  Han GAO ,  Jing YE ,  Madhu PERINGASSERY KRISHNAN ,  Yushin CHO ,  Shan LIU

IPC: H04N19/159 ,  H04N19/103 ,  H04N19/186 ,  H04N19/70

Abstract: This disclosure relates generally to video coding and particularly to methods, devices, and systems for signaling prediction modes in recursively partitioned video frames. For example, a regional prediction mode flag syntax element may be introduced for indicating whether an entire coding region of a video frame signaled as being of a first predefined prediction mode is entirely coded in a second predefined prediction mode or not. The signaling schemes described in this disclosure facilitate reducing signaling overhead in video frames that employ a mix of different prediction modes.

公开(公告)号：US20250080730A1

公开(公告)日：2025-03-06

申请号：US18523374

申请日：2023-11-29

Applicant: TENCENT AMERICA LLC

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

IPC: H04N19/117 ,  H04N19/132 ,  H04N19/167 ,  H04N19/176 ,  H04N19/186 ,  H04N19/196 ,  H04N19/70

Abstract: This disclosure generally describes a set of advanced video coding technologies, and is specifically related to cross-component sample offset (CCSO) filtering. For example, a CCSO filter having fractional CCSO filtering tap positions may be used to generate sample offsets from one color component of a reconstructed video. The sample offsets may then be applied to a second color component of the reconstructed video. The reconstructed samples of the first color component may first be interpolated by an interpolation filter in order to generate interpolated samples of the first color component at the fractional CCSO tap positions. The interpolated samples may be used as input to the CCSO filter for the generation of the sample offsets.