公开(公告)号：US20210092401A1

公开(公告)日：2021-03-25

申请号：US17024246

申请日：2020-09-17

Applicant: TENCENT AMERICA LLC

Inventor： Yixin DU ,  Byeongdoo CHOI ,  Xiang LI ,  Xin ZHAO ,  Stephan WENGER ,  Shan LIU

IPC: H04N19/146 ,  H04N19/186 ,  H04N19/122 ,  H04N19/46 ,  H04N19/169

Abstract: A method, computer program, and computer system is provided for coding video data. Video data having a coding tree unit size is received. The coding tree unit size associated with the video data is signaled by setting two or more flags. The video data is encoded/decoded based on the flags corresponding to the signaled coding tree unit size.

公开(公告)号：US20210067809A1

公开(公告)日：2021-03-04

申请号：US16999657

申请日：2020-08-21

Applicant: TENCENT AMERICA LLC

Inventor： Yixin DU ,  Xiang Li ,  Xin ZHAO ,  Shan LIU ,  Byeongdoo CHOI ,  Stephan WENGER

IPC: H04N19/96 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70

Abstract: There is included a method and apparatus comprising computer code configured to cause a processor or processors to perform obtaining a coding tree unit (CTU) from video data, partitioning the CTU by a quadtree structure, partitioning leaf nodes of the partitioned CTU by at least one of a binary tree structure and a ternary tree structure, and signaling a difference, in base 2 logarithm, between at least one value and a size of a sample resulting from at least one of partitioning the CTU by the quadtree structure and partitioning leaf nodes of the partitioned CTU by the at least one of the binary tree structure and the ternary tree structure.

公开(公告)号：US20230319317A1

公开(公告)日：2023-10-05

申请号：US18332563

申请日：2023-06-09

Applicant: TENCENT AMERICA LLC

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

IPC: H04N19/82 ,  H04N19/176 ,  H04N19/186 ,  H04N19/117 ,  H04N19/86 ,  H04N19/593 ,  H04N19/70 ,  H04N19/119

CPC classification number: H04N19/82 ,  H04N19/176 ,  H04N19/186 ,  H04N19/117 ,  H04N19/86 ,  H04N19/593 ,  H04N19/70 ,  H04N19/119

Abstract: A method for filtering in video encoding is provided. In the method, based on a determination that (i) an intra block copy (IBC) mode is disabled for a chroma component of a block and the IBC mode is enabled for a luma component of the block or (ii) decoupled partitioning structures are applied to the luma component of the block and the chroma component of the block, at least one loop filter is enabled for the chroma component of the block, a first sample of the luma component at a location in the block is determined based on a first loop filter configuration that does not include the at least one loop filter, and a second sample of the chroma component at the location in the block is determined based on a second loop filter configuration that includes the at least one loop filter.

公开(公告)号：US20230126791A1

公开(公告)日：2023-04-27

申请号：US18070315

申请日：2022-11-28

Applicant: TENCENT AMERICA LLC

Inventor： Yixin DU ,  Xin ZHAO ,  Shan LIU

IPC: H04N19/44 ,  H04N19/132 ,  H04N19/117 ,  H04N19/176 ,  H04N19/30 ,  H04N19/70 ,  H04N19/186 ,  H04N19/124

Abstract: A method of video decoding includes determining reconstructed samples of a first color component in a filter support region of a current picture that is a part of a coded video sequence, and performing a cross-component sample offset (CCSO) filter process on the reconstructed samples of the first color component in the filter support region to generate an output offset value. The method also includes scaling the output offset value based on the reconstructed samples of the first color component in the filter support region, and reconstructing samples of a second color component in the filter support region based on the scaled output offset value. The second color component is different from the first color component.

公开(公告)号：US20230110374A1

公开(公告)日：2023-04-13

申请号：US18065940

申请日：2022-12-14

Applicant: TENCENT AMERICA LLC

Inventor： Xin ZHAO ,  Yixin DU ,  Shan LIU

IPC: H04N19/44 ,  H04N19/132 ,  H04N19/176 ,  H04N19/80 ,  H04N19/186 ,  H04N19/117

Abstract: An apparatus includes processing circuitry that decodes prediction information of a current block in a current picture that is a part of a coded video sequence. The processing circuitry determines whether a cross component filtering (CCF) process is enabled for the current block based on one of a partitioning scheme, a prediction mode, a block width, a block height, transform coefficients, and quantization parameters. The processing circuitry generates filtered reconstruction samples of the current block by applying the CCF process on at least one of predicted samples, residual values, or reconstruction samples of the current block based on the CCF process being enabled. The filtered reconstruction samples of the current block are used for reconstruction of a subsequent block. The processing circuitry reconstructs the current block and the subsequent block based on the filtered reconstruction samples of the current block.

公开(公告)号：US20230077218A1

公开(公告)日：2023-03-09

申请号：US17983774

申请日：2022-11-09

Applicant: Tencent America LLC

Inventor： Yixin DU ,  Xin ZHAO ,  Shan LIU

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

Abstract: Aspects of the disclosure provide methods and apparatuses for video encoding/decoding. In some examples, an apparatus for video decoding includes processing circuitry. The processing circuitry reconstructs a first sample in a video of a coded video bitstream based on 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 including at least two filter shape configurations that are based on a same geometric shape. The processing circuitry determines a switch from the first filter shape configuration to a second filter shape configuration. The processing circuitry reconstructs 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：US20230048558A1

公开(公告)日：2023-02-16

申请号：US17976492

申请日：2022-10-28

Applicant: Tencent America LLC

Inventor： Yixin DU ,  Xin ZHAO ,  Xiang LI ,  Shan LIU

IPC: H04N19/96 ,  H04N19/176 ,  H04N19/186

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 a coding tree unit (CTU) size for a plurality of pictures. The processing circuitry generates CTU size information based on the determined CTU size. The processing circuitry encodes the plurality of pictures based on the determined CTU size. The CTU size information includes a first bit that is a first value based on the CTU size being determined as a first CTU size. The CTU size information includes the first bit that is a second value and a second bit based on the CTU size being determined as one of a second CTU size and a third CTU size. The CTU size information includes the second bit based on the first bit being the second value.

公开(公告)号：US20220303586A1

公开(公告)日：2022-09-22

申请号：US17568565

申请日：2022-01-04

Applicant: TENCENT AMERICA LLC

Inventor： Yixin DU ,  Xin ZHAO ,  Shan LIU

IPC: H04N19/82 ,  H04N19/132 ,  H04N19/186 ,  H04N19/176 ,  H04N19/14 ,  H04N19/70 ,  H04N19/105 ,  H04N19/159 ,  H04N19/593 ,  H04N19/117 ,  H04N19/107 ,  H04N19/503

Abstract: A method for in-loop sample offset filtering in a video decoder is disclosed. The method includes obtaining at least one statistical property associated with reconstructed samples of at least a first color component in a current reconstructed data block of a video stream, selecting a target sample offset filter among a plurality of sample offset filters based on the at least one statistical property, the target sample offset filter comprising a nonlinear mapping between sample delta measures and sample offset values, and filtering a current sample in a second color component of the current reconstructed data block using the target sample offset filter and reference samples in a third color component of the current reconstructed data block to generate a filtered reconstructed sample of the current sample.

公开(公告)号：US20220191550A1

公开(公告)日：2022-06-16

申请号：US17688591

申请日：2022-03-07

Applicant: Tencent America LLC

Inventor： Yixin DU ,  Xin ZHAO ,  Shan LIU

IPC: H04N19/80 ,  H04N19/176 ,  H04N19/186 ,  H04N19/136 ,  H04N19/117 ,  H04N19/46

Abstract: Aspects of the disclosure provide methods and apparatuses for video encoding/decoding, In some examples, an apparatus for video decoding includes processing circuitry, For example, the processing circuitry generates first reconstructed samples of a block, and applies a filter to multiple color components of the first reconstructed samples of the block to determine offsets to he applied to one or more color components. Then, the processing circuitry generates second reconstructed samples of the block based on the offsets for the one or more color components and the first reconstructed samples of the block.

公开(公告)号：US20220191485A1

公开(公告)日：2022-06-16

申请号：US17684384

申请日：2022-03-01

Applicant: Tencent America LLC

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

IPC: H04N19/117 ,  H04N19/82 ,  H04N19/176 ,  H04N19/159 ,  H04N19/186 ,  H04N19/46

Abstract: An image processing method includes obtaining statistics information of a block of an image frame, determining whether the statistics information satisfies a condition, and disabling cross-component filtering (CCF) for the block in response to the statistics information satisfying the condition.