公开(公告)号：US20230143151A1

公开(公告)日：2023-05-11

申请号：US17966390

申请日：2022-10-14

Applicant: Tencent America LLC

Inventor： Madhu PERINGASSERY KRISHNAN ,  Xin ZHAO ,  Shan LIU

IPC: H04N19/12 ,  H04N19/186 ,  H04N19/18 ,  H04N19/176 ,  H04N19/46

CPC classification number: H04N19/12 ,  H04N19/18 ,  H04N19/46 ,  H04N19/176 ,  H04N19/186

Abstract: This disclosure relates generally to video coding and particularly to cross component level reconstruction. For example, a method is disclosed for processing video data which may include extracting a first transform block of a first color component and a second transform block of a second color component from a bitstream of a video block; determining that transform coefficients in the first transform block are all zero; determining that a CCLR is applied to the first transform block; refining one or more of the transform coefficients in the first transform block, to obtain a refined first transform block; determining a target transform kernel for the refined first transform block; performing a reverse transform on the refined first transform block based on the target transform kernel to obtain a target block; and reconstructing the first color component of the video block based on at least the target block.

公开(公告)号：US20230135166A1

公开(公告)日：2023-05-04

申请号：US17974068

申请日：2022-10-26

Applicant: Tencent America LLC

Inventor： Xin ZHAO ,  Xiaozhong XU ,  Shan LIU

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46

Abstract: This disclosure relates generally to video coding and particularly to intra block copy coding mode using wedgelet partitioning. For example, a method is disclosed for processing video data which may include receiving a video bitstream comprising a current block of a video frame; extracting an IntraBC flag from the video bitstream indicating that the current block is predicted under an IntraBC mode; determining from the video bitstream that the current block is partitioned under a wedgelet partitioning mode, wherein the current block is partitioned into a plurality of partitions comprising a first partition and a second partition; identifying at least the first partition and the second partition of the current block; determining a first block vector for predicting the first partition and a second block vector for predicting the second partition, respectively; and decoding the current block based on at least the first block vector and second block vector.

公开(公告)号：US20230128313A1

公开(公告)日：2023-04-27

申请号：US17824248

申请日：2022-05-25

Applicant: TENCENT AMERICA LLC

Inventor： Liang ZHAO ,  Xin ZHAO ,  Shan LIU

IPC: H04N19/137 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/70

Abstract: This disclosure relates signaling of adaptive resolution for motion vector difference in video encoding and decoding. An example method is disclosed decoding one or more video blocks of a video stream. The method may include receiving the video stream; extracting an inter-prediction syntax element from the video stream to determine whether an ADAPTMV mode is signaled for one or more video blocks, the ADAPTMV mode being a single-reference inter-prediction mode with adaptive motion vector difference (MVD) pixel resolution; determining a current MVD pixel resolution associated with the one or more video blocks abased on whether the ADAPTMV mode is signaled in the inter-prediction syntax element; and extracting and decoding one or more MVD-related syntax elements associated with the one or more video blocks based on whether the ADAPTMV mode is signaled in the inter-prediction syntax element and the current MVD pixel resolution.

公开(公告)号：US20230126552A1

公开(公告)日：2023-04-27

申请号：US17700887

申请日：2022-03-22

Applicant: Tencent America LLC

Inventor： Liang ZHAO ,  Xin ZHAO ,  Shan LIU

IPC: H04N19/137 ,  H04N19/70 ,  H04N19/176

Abstract: This disclosure relates encoding and decoding of motion vector difference in for inter-predicting a video block. An example is disclosed for decoding an inter-predicted video block of a video stream. The method includes deriving an inter-prediction mode for the video block from the video stream; deriving a motion vector prediction mode for the video block; deriving, from the video stream, a context for signaling a set of syntax elements associated with a Motion Vector Difference (MVD) associated with the video block based on the inter-prediction mode and/or the motion vector prediction mode; and decoding the video block based on the set of syntax elements and the derived context.

公开(公告)号：US20230086585A1

公开(公告)日：2023-03-23

申请号：US18071859

申请日：2022-11-30

Applicant: TENCENT AMERICA LLC

Inventor： Stephan WENGER ,  Shan LIU

IPC: H04N19/66 ,  H04N19/196 ,  H04N19/70 ,  H04N19/177 ,  H04N19/44 ,  H04N19/127 ,  H04N19/169 ,  H04N19/463

Abstract: A method of and a device for decoding a coded picture coded according to a video codec technology or standard that uses a syntax structure including a Picture Header and at least one Picture Parameter Set (PPS) are provided. The method includes decoding, by a decoder, the Picture Header, the Picture Header including transient information pertaining to a plurality of Coding Units of the coded picture, and the transient information of the Picture Header including at least one reference to the at least one PPS, and further including at least one first syntax element pertaining to an aspect of the video codec technology or standard for decoding. The method further includes activating, by the decoder, a PPS of the at least one PPS that is decoded, the PPS including a second syntax element pertaining to the aspect of the video codec technology or standard for decoding.

公开(公告)号：US20230084029A1

公开(公告)日：2023-03-16

申请号：US17941924

申请日：2022-09-09

Applicant: TENCENT AMERICA LLC

Inventor： Byeongdoo CHOI ,  Shan LIU ,  Stephan WENGER

IPC: H04N19/82 ,  H04N19/70

Abstract: A method, computer program, and/or computer system is provided for coding a video sequence. Video data containing one or more faces may be received. One or more virtual boundaries between the one or more faces of the received video data may be selected. In-loop filtering may be disabled between the one or more selected virtual boundaries from among the virtual boundaries, based on the selected boundaries being discontinuous in a three-dimensional geometry.

公开(公告)号：US20230061216A1

公开(公告)日：2023-03-02

申请号：US17893877

申请日：2022-08-23

Applicant: Tencent America LLC

Inventor： Xin ZHAO ,  Xiaozhong XU ,  Shan LIU

IPC: H04N19/105 ,  H04N19/463 ,  H04N19/423 ,  H04N19/176 ,  H04N19/172 ,  H04N19/593 ,  H04N19/159 ,  H04N19/132 ,  H04N19/136

Abstract: Aspects of the disclosure provide a method, an apparatus, and non-transitory computer-readable storage medium for video decoding. The apparatus includes processing circuitry configured to reconstruct an area in a block in a current picture from a coded video bitstream. The block includes one or more coding blocks (CBs) in the current picture. After the reconstructing, the processing circuitry determines whether to update a previous local reference range for an intra block copy (IBC) mode based on a content of the reconstructed area and/or prediction information of the reconstructed area. In response to a determination not to update the previous local reference range for the IBC mode, the previous local reference range for the IBC mode is not updated. The processing circuitry decodes a coding block in the current picture using the IBC mode that is based on the previous local reference range, which does not include the reconstructed area.

公开(公告)号：US20230060151A1

公开(公告)日：2023-03-02

申请号：US17978125

申请日：2022-10-31

Applicant: Tencent America LLC

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

IPC: H04N19/11 ,  H04N19/70 ,  H04N19/176

Abstract: A method for video encoding includes determining an intra prediction angle for encoding a current block in a coded video sequence, the intra prediction angle being (i) beyond a bottom left direction diagonal mode, or (ii) beyond a top right direction diagonal mode. The method further includes determining an intra prediction mode corresponding to the intra prediction angle used to encode the current block based on a predetermined relationship between a plurality of intra prediction modes and a corresponding plurality of intra prediction angles, and generating prediction information indicating the determined intra prediction mode corresponding to the intra prediction angle used to encode the current block.

公开(公告)号：US20230057207A1

公开(公告)日：2023-02-23

申请号：US17892976

申请日：2022-08-22

Applicant: Tencent America LLC

Inventor： Jun TIAN ,  Xiaozhong XU ,  Shan LIU

IPC: H04S7/00

Abstract: Aspects of the disclosure provide methods and apparatuses for audio processing. In some examples, an apparatus for media processing includes processing circuitry. The processing circuitry receives first six degrees of freedom (6 DoF) information associated with a media content for a scene in a media application. The first 6 DoF information includes a first spatial location and a first rotation orientation for rotation about a center at the first spatial location. The processing circuitry determines that a rendering platform for rendering the media content is a three degrees of freedom (3 DoF) platform; and calculates, a revolution orientation of the media content on a sphere centered other than the first spatial location, according to at least the first spatial location. The revolution orientation is 3 DoF information associated with the media content for rendering on the 3 DoF platform.

公开(公告)号：US20230054988A1

公开(公告)日：2023-02-23

申请号：US17975386

申请日：2022-10-27

Applicant: Tencent America LLC

Inventor： Guichun LI ,  Xiang LI ,  Shan LIU

IPC: H04N19/52 ,  H04N19/105 ,  H04N19/577 ,  H04N19/176 ,  H04N19/189

Abstract: Aspects of the disclosure provide a method and an apparatus for video coding. In some examples, an apparatus includes processing circuitry that determines first motion vectors for a plurality of subblocks of a current block based on a first relative position in each subblock of the plurality of subblocks, and determines second motion vectors for the plurality of subblocks based on a second relative position in each subblock of the plurality of subblocks. The processing circuitry obtains a first set of predicted samples for the current block based on the first motion vectors of the plurality of subblocks. Further, the processing circuitry obtains a second set of predicted samples for the current block based on the second motion vectors of the plurality of subblocks, and obtains a third set of predicted samples for the current block based on the first set of predicted samples and the second set of predicted samples.