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.

公开(公告)号：US20250063171A1

公开(公告)日：2025-02-20

申请号：US18497697

申请日：2023-10-30

Applicant: TENCENT AMERICA LLC

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

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

Abstract: This disclosure relates generally to video coding and particularly to methods and systems for deriving context adaptive interpolation filter used for generating prediction samples in inter prediction involving a fractional motion vector or block vector. For example, an encoder and a decoder may derive interpolation filters adaptively using reconstructed samples. The reconstructed samples may belong to templates near a current block and a reference block related by the motion vector or block vector. The derivation of the adaptive interpolation filters may be based on minimizing distortions between interpolated templates associated with the reference block and the templates associated with the current block.

公开(公告)号：US20250008122A1

公开(公告)日：2025-01-02

申请号：US18384308

申请日：2023-10-26

Applicant: Tencent America LLC

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

IPC: H04N19/176 ,  H04N19/105 ,  H04N19/122 ,  H04N19/124 ,  H04N19/13 ,  H04N19/132 ,  H04N19/159 ,  H04N19/172 ,  H04N19/18 ,  H04N19/463 ,  H04N19/61

Abstract: A video bitstream comprising coded information of a plurality of partial residual blocks of a current block in a current picture is received. Each of the plurality of partial residual blocks indicates a difference between a respective prediction block of the current block and the current block. The plurality of partial residual blocks of the current block is determined based on respective coding parameters. A residual block is determined based on the plurality of partial residual blocks. A prediction block for the current block is determined. The current block is reconstructed based on a combination of the derived residual block and the determined prediction block.

公开(公告)号：US20200045328A1

公开(公告)日：2020-02-06

申请号：US16440315

申请日：2019-06-13

Applicant: Tencent America LLC

Inventor： Jing YE ,  Shan LIU ,  Xiang LI ,  Guichun LI ,  Xiaozhong XU

IPC: H04N19/513 ,  H04N19/44

Abstract: An apparatus for video decoding includes receiving circuitry and processing circuitry. The processing circuitry decodes prediction information for a current block in a current picture from a coded video bitstream, the prediction information being indicative of a prediction mode that is based on an expanded motion vector candidate list. The processing circuitry expands the current block to generate an expanded block by iteratively (i) increasing a width of the current block by a first grid size and (ii) increasing a height of the current block by a second grid size until a number of iterations is equal to a value indicative of a maximum search round. The processing circuitry searches and locates, in the expanded block, a plurality of blocks and constructs, in response to the prediction mode, the expanded motion vector candidate list.

公开(公告)号：US20190246118A1

公开(公告)日：2019-08-08

申请号：US16205053

申请日：2018-11-29

Applicant: Tencent America LLC

Inventor： Jing YE ,  Xiang Li ,  Shan Liu

IPC: H04N19/176 ,  H04N19/70 ,  H04N19/52 ,  H04N19/46 ,  H04N19/44

Abstract: A method for video coding using a merge mode by a decoder or encoder. An embodiment of the method includes receiving a current block having a block size, setting a grid pattern based on the block size of the current block, wherein the grid pattern partitions a search region adjacent to the current block into search blocks, and a size of the search blocks is determined according to the block size of the current block, and searching for one or more spatial merge candidates from candidate positions in the search blocks to construct a candidate list that includes the one or more spatial merge candidates.

公开(公告)号：US20250142060A1

公开(公告)日：2025-05-01

申请号：US18620933

申请日：2024-03-28

Applicant: Tencent America LLC

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

IPC: H04N19/117 ,  H04N19/172 ,  H04N19/82

Abstract: An example method of video coding includes receiving a video bitstream for a plurality of encoded pictures. The method also includes obtaining a reconstructed picture that corresponds to an encoded picture of the plurality of encoded pictures and deriving a set of quantization parameters for the reconstructed picture, the set of quantization parameters derived from a set of reference quantization parameters for the encoded picture. The method further includes performing loop filtering on the reconstructed picture using the set of quantization parameters.

公开(公告)号：US20250142048A1

公开(公告)日：2025-05-01

申请号：US18677745

申请日：2024-05-29

Applicant: Tencent America LLC

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

IPC: H04N19/102 ,  H04N19/147 ,  H04N19/159 ,  H04N19/176 ,  H04N19/60 ,  H04N19/70 ,  H04N19/91

Abstract: The various implementations described herein include methods and systems for coding video. In one aspect, a method includes receiving a video bitstream comprising a set of encoded video information and a first indicator associated with a plurality of probability models. The method includes determining a value of the first indicator by parsing the video bitstream. The method includes, when the first indicator has a first value, selecting a first probability model from the plurality of probability models and when the first indicator has a second value, selecting a second probability model from the plurality of probability models, the second probability model being different from the first probability model. The method also includes entropy decoding the set of encoded video information using the selected probability model.