公开(公告)号：US20230388535A1

公开(公告)日：2023-11-30

申请号：US18142192

申请日：2023-05-02

Applicant: TENCENT AMERICA LLC

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

IPC: H04N19/513 ,  H04N19/139 ,  H04N19/176

CPC classification number: H04N19/513 ,  H04N19/139 ,  H04N19/176

Abstract: The implementations described herein include methods and systems for coding video. In one aspect, a method includes receiving a current frame including a current coding block. The current coding block has multiple subblocks. The subblocks are associated with different motion vectors, and include a first subblock located at a boundary of the current coding block. The method includes determining a motion vector of the current coding block, determining a first motion vector of the first subblock, and generating motion compensation data of the first subblock based on the motion vector and the first motion vector of the first subblock, e.g., by identifying a prediction block based on the motion vector of the current coding block, identifying a first prediction block based on the first motion vector of the first subblock, and combining the prediction block and the first prediction block to generate the motion compensation data of the first subblock.

公开(公告)号：US20250168395A1

公开(公告)日：2025-05-22

申请号：US18622842

申请日：2024-03-29

Applicant: Tencent America LLC

Inventor： Han GAO ,  Liang Zhao ,  Xin Zhao ,  Jing Ye ,  Shan Liu

IPC: H04N19/52 ,  H04N19/132 ,  H04N19/139 ,  H04N19/157 ,  H04N19/167 ,  H04N19/172 ,  H04N19/176 ,  H04N19/80

Abstract: An example method of video coding includes receiving a video bitstream comprising a plurality of blocks. The method also includes deriving a set of subblock motion vectors for a current subblock of a current block of the plurality of blocks and deriving a set of refined subblock motion vectors for the current subblock using bilateral matching that is based on one or more samples outside of the current subblock. The method further includes reconstructing the current subblock using the derived set of refined subblock motion vectors.

公开(公告)号：US20250150592A1

公开(公告)日：2025-05-08

申请号：US18622837

申请日：2024-03-29

Applicant: Tencent America LLC

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

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/159 ,  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 first syntax element for a multi-hypothesis cross-component prediction (MH-CCP) mode. A computing system determines that the MH-CCP mode is enabled to reconstruct each of a plurality of chroma samples of the current coding block using a respective luma sample and one or more neighboring luma samples. The computing device determines a number (N) of model parameters used in the MH-CCP mode for at least the current coding block, and identifies one or more neighboring luma samples of a first luma sample based on the number (N) of model parameters. A first chroma sample that is collocated with the first luma sample is determined based on the first luma sample and the one or more neighboring luma samples.

公开(公告)号：US20250126252A1

公开(公告)日：2025-04-17

申请号：US18660064

申请日：2024-05-09

Applicant: Tencent America LLC

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

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

Abstract: Various implementations described herein include methods and systems for coding video. In one aspect, a video bitstream includes a current image frame and a first filter control parameter for a loop filter to process a first filtering block of the current image frame. An electronic device receives the video bitstream and determines a filter unit size for processing the current image frame by the loop filter. The first filtering block has the filter unit size. The first filtering block is identified in the current image frame based on the filter unit size. When the first filter control parameter is enabled, the loop filter is applied to process one or more samples of the first filtering block. The current image frame includes the first filtering block.

公开(公告)号：US20250119585A1

公开(公告)日：2025-04-10

申请号：US18480957

申请日：2023-10-04

Applicant: Tencent America LLC

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

IPC: H04N19/70 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46

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 that includes a first block and a plurality of residual coefficients, from a video bitstream. The first block is encoded in an intra prediction mode, and the plurality of residual coefficients are generated by applying a short distance intra prediction to a residue block for the first block. The residue block generated from applying the intra prediction mode to the first block. The method includes generating, from the plurality of residual coefficients, a refined residue block for the first block, and generating a reconstructed residue block for the first block, where the reconstructed residue block is generated using an intra prediction block and the refined residue block. The method also includes reconstructing the first block using the refined residue block.

公开(公告)号：US20250119546A1

公开(公告)日：2025-04-10

申请号：US18660074

申请日：2024-05-09

Applicant: Tencent America LLC

Inventor： Han GAO ,  Xin Zhao ,  Liang Zhao ,  Jing Ye ,  Shan Liu

IPC: H04N19/132 ,  H04N19/172 ,  H04N19/186 ,  H04N19/70

Abstract: Various implementations described herein include methods and systems for coding video. In one aspect, a video bitstream includes a high level syntax element for a frame level cross-component sample offset (CCSO) flag indicating whether to apply CCSO filtering on a current image frame. When the frame level CCSO flag indicates that CCSO filtering is applied the current image frame, an electronic device identifies, in the video bitstream, a first syntax element for a first component CCSO flag indicating whether to apply CCSO filtering on a first color component of the current image frame, and determines whether to apply CCSO filtering on a first color sample of the first color component based on the first syntax element. The current image frame including the first color sample of the first color component is reconstructed.

公开(公告)号：US20250119538A1

公开(公告)日：2025-04-10

申请号：US18660067

申请日：2024-05-09

Applicant: Tencent America LLC

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

IPC: H04N19/117 ,  H04N19/124 ,  H04N19/132 ,  H04N19/159 ,  H04N19/167 ,  H04N19/172 ,  H04N19/184 ,  H04N19/186 ,  H04N19/593 ,  H04N19/70 ,  H04N19/82

Abstract: Various implementations described herein include methods and systems for coding video. In one aspect, a video bitstream includes a current image frame and a first syntax element. An electronic device determines that the first syntax element has a first predefined value indicating that the cross-component sample offset (CCSO) mode is enabled, and generates a set of adapted luma samples including an adapted first luma sample and its adapted neighboring luma samples based on a set of reconstructed luma samples. The reconstructed luma samples include a first luma sample that is collocated with a first color sample. The electronic device determines the first sample offset of the first color sample based on the adapted first luma sample and the one or more adapted neighboring luma samples. The current image frame is reconstructed at least by adjusting the first color sample based on the first sample offset.

公开(公告)号：US20250106407A1

公开(公告)日：2025-03-27

申请号：US18400223

申请日：2023-12-29

Applicant: Tencent America LLC

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

IPC: H04N19/176 ,  H04N19/105 ,  H04N19/136 ,  H04N19/159 ,  H04N19/30 ,  H04N19/503 ,  H04N19/70

Abstract: This disclosure relates generally to video coding/decoding and particularly prediction using multiple scaling factors and multiple samples. One method includes receiving a video bitstream comprising a current block and a reference block, the reference block being used for predicting the current block by using a prediction function; receiving, from the video bitstream, a first syntax element indicating a manner for determining parameters of the prediction function; determining the parameters of the prediction function based on the manner; predicting a current sample in the current block based on the reference block using the prediction function; and reconstructing the current block based on the predicted current sample.

公开(公告)号：US20250080729A1

公开(公告)日：2025-03-06

申请号：US18497908

申请日：2023-10-30

Applicant: Tencent America LLC

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

IPC: H04N19/117 ,  H04N19/124 ,  H04N19/132 ,  H04N19/136 ,  H04N19/157 ,  H04N19/172 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70 ,  H04N19/82

Abstract: 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, a first syntax element for a cross-component sample offset mode, and a second syntax element for a filter type and a filter shape index of a loop filter. Based on the loop filter, an electronic device identifies one or more neighboring luma samples of a first luma sample of the current coding block. The electronic device further determines and quantizes one or more difference values between the one or more neighboring luma samples and the first luma sample. The electronic device classifies a first color sample co-located with the first luma sample based on the quantized difference values to determine a first sample offset. The current coding block is reconstructed at least by adjusting the first color sample based on the first sample offset.

公开(公告)号：US20250039385A1

公开(公告)日：2025-01-30

申请号：US18643479

申请日：2024-04-23

Applicant: Tencent America LLC

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

IPC: H04N19/13 ,  H04N19/105 ,  H04N19/11 ,  H04N19/12 ,  H04N19/124 ,  H04N19/172 ,  H04N19/176 ,  H04N19/61

Abstract: This disclosure relates generally to video coding/decoding. One method includes receiving a video bitstream comprising a current picture, the current picture comprising the current block, and the current block comprising a current transform block; extracting a syntax element for a skip transform flag, the skip transform flag indicating whether the current transform block has all zero coefficient; deriving a context for entropy decoding the skip transform flag based on at least one of: a prediction mode of the current transform block; a quantization index information for the current transform block; or whether the current transform block is calculated by a secondary transform that is applied jointly on a transform block of a second component; decoding the skip transform flag using the context; and reconstructing the current block based on skip transform flag.