公开(公告)号：US20230412828A1

公开(公告)日：2023-12-21

申请号：US18458015

申请日：2023-08-29

Applicant: TENCENT AMERICA LLC

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

IPC: H04N19/44 ,  H04N19/132 ,  H04N19/117 ,  H04N19/82 ,  H04N19/176 ,  H04N19/137 ,  H04N19/513 ,  H04N19/186 ,  H04N19/159

CPC classification number: H04N19/44 ,  H04N19/132 ,  H04N19/117 ,  H04N19/82 ,  H04N19/176 ,  H04N19/137 ,  H04N19/513 ,  H04N19/186 ,  H04N19/159

Abstract: Aspects of the disclosure provide methods and apparatuses for video encoding/decoding. In some examples, an apparatus includes processing circuitry. For example, the processing circuitry obtains reconstructed samples in a temporal source frame that is different from a current frame, and determines filter coefficients of a filter for a current block in the current frame based on at least the reconstructed samples in the temporal source frame. The processing circuitry generates prediction information of the current block based on the determined filter coefficients. The temporal source frame is an inter coded frame that satisfies at least one of a quantization parameter (QP) requirement, a temporal distance requirement, and a reference picture requirement.

公开(公告)号：US20230164325A1

公开(公告)日：2023-05-25

申请号：US18100942

申请日：2023-01-24

Applicant: TENCENT AMERICA LLC

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

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

CPC classification number: H04N19/146 ,  H04N19/46 ,  H04N19/1883 ,  H04N19/186 ,  H04N19/122

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：US20230085672A1

公开(公告)日：2023-03-23

申请号：US18070028

申请日：2022-11-28

Applicant: TENCENT AMERICA LLC

Inventor： Sehoon YEA ,  Yixin DU ,  Xin ZHAO ,  Shan LIU

IPC: H04N19/44 ,  H04N19/117 ,  H04N19/176 ,  H04N19/105 ,  H04N19/159 ,  H04N19/82

Abstract: A method of video decoding includes determining directionality information of a restoration filter unit included in a video frame based on directionality of each of one or more groups of pixels in the restoration filter unit determined by at least one of a previously performed CDEF process or a previously performed intra prediction coding process. The method also includes selecting, based on the directionality information of the restoration filter unit, a set of filter parameters from among a plurality of sets of filter parameters of a restoration filter process, and, after the at least one of the previously performed CDEF process or the previously performed intra prediction coding process, performing one of a Wiener filter process or a self-guided projection filter process as the restoration filter process on the restoration filter unit based on the selected set of filter parameters.

公开(公告)号：US20220303584A1

公开(公告)日：2022-09-22

申请号：US17449126

申请日：2021-09-28

Applicant: TENCENT AMERICA LLC

Inventor： Yixin DU ,  Xin ZHAO ,  Shan LIU

IPC: H04N19/82 ,  H04N19/186 ,  H04N19/86

Abstract: Aspects of the disclosure provide methods and apparatuses for filtering in video encoding/decoding. In some examples, an apparatus for video filtering includes processing circuitry. The processing circuitry determines a first offset value for applying a non linear mapping based filter based on first reconstructed samples at a first node in a loop filter chain. Then, the processing circuitry applies the first offset value to an intermediate reconstructed sample at a second node along the loop filter chain to generate a second reconstructed sample.

公开(公告)号：US20220272340A1

公开(公告)日：2022-08-25

申请号：US17741072

申请日：2022-05-10

Applicant: TENCENT AMERICA LLC

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

IPC: H04N19/119 ,  H04N19/46 ,  H04N19/172 ,  H04N19/169 ,  H04N19/70

Abstract: Systems and methods may provide flexible picture partitioning, a method includes receiving a bitstream, that includes a picture, the picture partitioned into a plurality of coding tree units (CTUs), wherein at least one row or column of CTUs, among the plurality of CTUs of the picture, that is adjacent to a boundary of the picture has a size dimension that is smaller than a corresponding size dimension of each CTU among the plurality of CTUs that is not adjacent to any boundary of the picture; and encoding the bitstream based on the plurality of CTUs, wherein the at least one row or column of CTUs includes a first CTU row or a first CTU column of the picture that is adjacent to a top boundary or left boundary of the picture, respectively.

公开(公告)号：US20220086472A1

公开(公告)日：2022-03-17

申请号：US17315989

申请日：2021-05-10

Applicant: TENCENT AMERICA LLC

Inventor： Xin ZHAO ,  Yixin DU ,  Shan LIU

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

Abstract: Aspects of the disclosure include methods, apparatuses, and non-transitory computer-readable storage mediums for video encoding/decoding. 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 prediction information indicates a cross component filtering (CCF) process for the current block. 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. 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：US20210092368A1

公开(公告)日：2021-03-25

申请号：US17022733

申请日：2020-09-16

Applicant: TENCENT AMERICA LLC

Inventor： Yixin DU ,  Xin Zhao ,  Xiang Li ,  Shan Liu

IPC: H04N19/117 ,  H04N19/186

Abstract: A method, computer program, and computer system is provided for video coding. Video data comprising a chroma component and a luma component is received. Luma samples are extracted from the luma component of the received video data. The chroma component is filtered by a cross-component adaptive loop filter (CC-ALF) based on a location of a chroma sample associated with the chroma component, the extracted luma samples, filter weights associated with the extracted luma samples, and an offset value.

公开(公告)号：US20250150621A1

公开(公告)日：2025-05-08

申请号：US19017060

申请日：2025-01-10

Applicant: Tencent America LLC

Inventor： Yixin DU ,  Xun Zhao ,  Shan Liu

IPC: H04N19/593 ,  H04N19/176 ,  H04N19/186 ,  H04N19/82

Abstract: An example method of video decoding includes decoding prediction information for a current block, the prediction information indicating a plurality of combinations of processed reconstructed samples and corresponding output values of a filtering process. The method also includes performing the filtering process on processed reconstructed samples of a first color component of the current block, the processed reconstructed samples of the first color not being included in the plurality of combinations of the processed reconstructed samples indicated in the prediction information. The method further includes determining an output value of the filter process based on one of: a default value, a predicted output value, and one of the output values indicated in the prediction information; and reconstructing the current block based on the output value being applied to reconstructed samples of a second color component of the current block, the second color component being different from the first color component.

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.