公开(公告)号：US20230025701A1

公开(公告)日：2023-01-26

申请号：US17858323

申请日：2022-07-06

Applicant: TENCENT AMERICA LLC

Inventor： Shuai ZHAO ,  Stephan WANGER ,  Shan LIU

IPC: H04L65/1069 ,  H04L67/104 ,  H04L65/61 ,  H04L65/1104

Abstract: A method, computer program, and computer system for enabling peer-to-peer media streaming using service enabler architecture layer (SEAL). The method may be executed by one or more processors, and the method may include receiving, by a vertical application layer (VAL) server, a request for a media session negotiation between one or more client devices, and retrieving, by the vertical application layer (VAL) server, transport layer information associated with each of the one or more client devices using network address translation traversal. The method may further include transmitting, by the vertical application layer (VAL) server, agreed session description protocol (SDP) parameters based on the transport layer information, wherein the agreed session description protocol (SDP) parameters are used to establish a peer-to-peer media streaming session.

公开(公告)号：US20230024288A1

公开(公告)日：2023-01-26

申请号：US17861667

申请日：2022-07-11

Applicant: Tencent America LLC

Inventor： Xiaozhong XU ,  Shan LIU

IPC: H04N19/44 ,  H04N19/172 ,  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 decode at least one first key picture of pictures from a multi-view bitstream. The pictures correspond to different views. The at least one first key picture corresponds to at least one first view of the different views. The processing circuitry determines first feature information of content in the at least one first key picture. The processing circuitry decode, based on the multi-view bitstream, a first feature change to the first feature information. The first feature change indicates a content change between a key picture in the at least one first key picture and a first picture. The processing circuitry reconstructs the first picture based on the decoded first feature change, the first feature information, and the key picture in the at least one first key picture.

公开(公告)号：US20230014820A1

公开(公告)日：2023-01-19

申请号：US17862066

申请日：2022-07-11

Applicant: Tencent America LLC

Inventor： Xiang ZHANG ,  Chao HUANG ,  Shan LIU

IPC: G06T9/00 ,  G06T17/20 ,  G06T15/04

Abstract: Aspects of the disclosure provide methods and apparatuses for mesh coding (e.g., compression and decompression). In some examples, an apparatus for mesh coding includes processing circuitry. The processing circuitry decodes, using a point cloud compression (PCC) decoder and from a bitstream, a point cloud that includes points corresponding to at least one of vertices in a mesh or sampling points of polygons in the mesh. The processing circuitry determines, based on the point cloud, estimated connectivity information of the vertices in the mesh, and generate, a reconstructed mesh frame based on the point cloud and the estimated connectivity information.

公开(公告)号：US20230013580A1

公开(公告)日：2023-01-19

申请号：US17941560

申请日：2022-09-09

Applicant: TENCENT AMERICA LLC

Inventor： Byeongdoo CHOI ,  Shan LIU ,  Stephan WENGER

IPC: H04N19/169 ,  H04N19/15 ,  H04N19/174

Abstract: Methods and devices for encoding a video stream are provided, a method includes storing previously decoded pictures of the video stream in a decoded picture buffer, including a plurality of first pictures of a same temporal sub-layer, the plurality of first pictures including at least one sub-layer reference picture for predicting a current picture of the video stream; identifying a network abstract layer (NAL) unit type of a picture of the plurality of first pictures; removing, based on the NAL unit type of the picture identified, the picture from the decoded picture buffer; and encoding the current picture using the decoded picture buffer. The encoding includes: predicting the current picture using one or more of the at least one sub-layer reference picture that is stored within the decoded picture buffer, after removing the picture from the decoded picture buffer.

公开(公告)号：US20230012475A1

公开(公告)日：2023-01-19

申请号：US17940936

申请日：2022-09-08

Applicant: Tencent America LLC

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

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

Abstract: A method for video decoding is provided. The method includes determining an intra prediction angle that corresponds to an intra prediction mode of a plurality of intra prediction modes, a subset of the plurality of intra prediction modes being mapped to a plurality of wide-angle intra prediction modes based on a ratio of a width of a block and a height of the block not being equal to 1, a number of the subset of the intra prediction modes mapped to the plurality wide-angle intra prediction modes being based on the ratio of the width of the block and the height of the block. At least one sample of the block is reconstructed based on the intra prediction angle that is determined to correspond to the intra prediction mode.

公开(公告)号：US20230007305A1

公开(公告)日：2023-01-05

申请号：US17850608

申请日：2022-06-27

Applicant: Tencent America LLC

Inventor： Byeongdoo CHOI ,  Stephan WENGER ,  Xiang LI ,  Shan LIU

IPC: H04N19/70 ,  H04N19/44 ,  H04N19/172 ,  H04N19/167 ,  H04N19/119 ,  H04N19/30

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 decode at least one of a first flag or a second flag in a syntax structure for a first picture in a coded video sequence (CVS). The first flag can indicate whether first subpicture partitioning information of the first picture is signaled in the syntax structure. The second flag can indicate whether first subpicture scaling window information for a first subpicture included in the first picture is signaled in the syntax structure. The processing circuitry reconstructs the first subpicture based on the at least one of the first flag indicating that the first subpicture partitioning information of the first picture is signaled in the syntax structure or the second flag indicating that the first subpicture scaling window information for the first subpicture is signaled in the syntax structure.

公开(公告)号：US20230007286A1

公开(公告)日：2023-01-05

申请号：US17943405

申请日：2022-09-13

Applicant: Tencent America LLC

Inventor： Xiaozhong XU ,  Shan LIU ,  Xiang LI

IPC: H04N19/436 ,  H04N19/423 ,  H04N19/44 ,  H04N19/176

Abstract: A method of video encoding includes, prior to encoding a first tile of s plurality of tiles of a current picture, initializing a shared row buffer that is shared among multiple processor threads associated with the first tile. The method also includes encoding a first unit of a plurality of units in a first row of the first tile by a first processor thread and using a corresponding first HMVP buffer. The method also includes, when all of the plurality of blocks in the first unit have been encoded, copying contents of the first HMVP buffer into the shared row buffer, copying contents of the shared row buffer into a second HMVP buffer, starting encoding of a unit in a second row of the plurality of rows by the second processor thread using the second HMVP buffer, and resetting the first HMVP buffer.

公开(公告)号：US20230007274A1

公开(公告)日：2023-01-05

申请号：US17940986

申请日：2022-09-08

Applicant: Tencent America LLC

Inventor： Xiaozhong XU ,  Xiang LI ,  Shan LIU

IPC: H04N19/159 ,  H04N19/174 ,  H04N19/96 ,  H04N19/176

Abstract: Methods, apparatuses, and non-transitory computer-readable mediums are provided. A block vector of a current block that is to be coded in intra block copy (IBC) mode is determined. The block vector points to a first reference block of the current block in a current picture. An operation is performed on at least one component of the block vector based on the first reference block being outside a search range of the current block. The block vector is modified by the operation to point to a second reference block that is within the search range for the current block. The current block is encoded based on the modified block vector. The performing the operation includes performing a modulo operation on a y component of the block vector based on a size of a current coding tree unit (CTU) that includes the current block.

公开(公告)号：US20230007251A1

公开(公告)日：2023-01-05

申请号：US17941952

申请日：2022-09-09

Applicant: TENCENT AMERICA LLC

Inventor： Xin ZHAO ,  Liang ZHAO ,  Shan LIU

IPC: H04N19/119 ,  H04N19/105 ,  H04N19/176 ,  H04N19/159 ,  H04N19/132

Abstract: There is includes a method and apparatus comprising computer code configured to cause a hardware processor or processors to perform obtaining a block of video data, splitting the block into an L-shaped partition and a second partition, the second partition being one of a rectangular shaped partition and another L-shaped partition, and performing intra prediction of the L-shaped partition by using a reference sample chain, comprising a chain of neighboring reconstructed samples, as reference samples.

公开(公告)号：US20220417548A1

公开(公告)日：2022-12-29

申请号：US17897865

申请日：2022-08-29

Applicant: Tencent America LLC

Inventor： Xiaozhong XU ,  Xiang LI ,  Shan LIU

IPC: H04N19/513 ,  H04N19/196 ,  H04N19/14 ,  H04N19/176

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 determines whether a current block in a current picture of a coded video sequence is a small block based on a block size threshold. The processing circuitry constructs a motion vector predictor list for the current block based on whether the current block is the small block. At least one redundancy check with a motion vector candidate in the motion vector predictor list is performed in the construction of the motion vector predictor list based on whether the current block is the small block. The current block is reconstructed based on the constructed motion vector predictor list.