公开(公告)号：US20200221139A1

公开(公告)日：2020-07-09

申请号：US16738287

申请日：2020-01-09

Applicant: TENCENT AMERICA LLC

Inventor： Arash VOSOUGHI ,  Sehoon YEA ,  Shan LIU ,  Byeongdoo CHOI ,  Stephan WENGER

IPC: H04N19/91 ,  H04N19/172 ,  H04N19/119 ,  H04N19/167

Abstract: A method of dynamic point cloud partition packing is by at least one processor and includes obtaining one or more region of interest (ROI) patches from an ROI of a point cloud, and attempting to pack, into one among tiles of a tile map, one among the obtained one or more ROI patches, in a tile scan order. The method further includes identifying whether the one among the one or more ROI patches is packed successfully into the one among the tiles, and based on the one among the one or more ROI patches being determined to be not packed successfully into the one among the tiles, chunking the one among the one or more ROI patches into multiple ROI patches.

公开(公告)号：US20200213603A1

公开(公告)日：2020-07-02

申请号：US16710915

申请日：2019-12-11

Applicant: TENCENT AMERICA LLC

Inventor： Byeongdoo CHOI ,  Stephan WENGER ,  Shan LIU

IPC: H04N19/423 ,  H04N19/70 ,  H04N19/44

Abstract: A method and apparatus for managing a decoded picture buffer for video decoding including decoding at least one syntax element related to a reference picture stored in the decoded picture buffer; and reconstructing a current picture using the reference picture, wherein the syntax element whether the reference picture available or unavailable for future reference.

公开(公告)号：US20240244267A1

公开(公告)日：2024-07-18

申请号：US18622819

申请日：2024-03-29

Applicant: TENCENT AMERICA LLC

Inventor： Byeongdoo CHOI ,  Shan LIU ,  Stephan WENGER

IPC: H04N19/70 ,  H04N19/12 ,  H04N19/174 ,  H04N19/60

CPC classification number: H04N19/70 ,  H04N19/12 ,  H04N19/174 ,  H04N19/60

Abstract: Aspects of the disclosure provide methods and apparatuses for video data processing. In some examples, an apparatus for video data processing includes processing circuitry. For example, the processing circuitry determines a first syntax element for coding control in a first scope of coded video data in a bitstream. The first syntax element is associated with a coding tool of a slice based Rice coding for a residual coding in a transform skip mode. The coding tool provides a Rice parameter at a slice level for the residual coding in the transform skip mode. In response to the first syntax element being a first value indicative of disabling of the coding tool in the first scope, the processing circuitry decodes the first scope of coded video data that includes one or more second scopes of coded video data without invoking the coding tool.

公开(公告)号：US20240223782A1

公开(公告)日：2024-07-04

申请号：US18437114

申请日：2024-02-08

Applicant: Tencent America LLC

Inventor： Byeongdoo CHOI ,  Stephan Wenger ,  Shan Liu

IPC: H04N19/167 ,  H04N19/103 ,  H04N19/172 ,  H04N19/30

CPC classification number: H04N19/167 ,  H04N19/103 ,  H04N19/172 ,  H04N19/30

Abstract: A method, computer program, and computer system is provided for decoding a video sequence. Video information corresponding to one or subpictures within a picture is received and the video information includes at least one output layer set corresponding to one or more output layers and a plurality of flags. A first subpicture is identified from among the subpictures as a region of interest based on the output layer set. The first subpicture corresponding to the region of interest is decoded in a high quality mode from an enhancement layer of the picture and remaining subpictures are decoded in a low quality mode from a base layer of the picture.

公开(公告)号：US20240179349A1

公开(公告)日：2024-05-30

申请号：US18434557

申请日：2024-02-06

Applicant: TENCENT AMERICA LLC

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

IPC: H04N19/70 ,  H04N19/132 ,  H04N19/167 ,  H04N19/172 ,  H04N19/187 ,  H04N19/30 ,  H04N19/44

CPC classification number: H04N19/70 ,  H04N19/132 ,  H04N19/167 ,  H04N19/172 ,  H04N19/187 ,  H04N19/30 ,  H04N19/44

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 that is configured to decode a current picture based on a bitstream. The processing circuitry can determine, from a supplemental enhancement information (SEI) message, a first flag indicating whether a warping process is applied to the current decoded picture. Based on the first flag indicating that the warping process is applied to the current decoded picture, the processing circuitry can determine warping information of the warping process based on the SEI message. The processing circuitry can determine a warped picture from the current decoded picture based on the warping information.

公开(公告)号：US20240137545A1

公开(公告)日：2024-04-25

申请号：US18402413

申请日：2024-01-02

Applicant: TENCENT AMERICA LLC

Inventor： Byeongdoo CHOI ,  Shan LIU ,  Stephan WENGER

IPC: H04N19/44 ,  H04N19/176 ,  H04N19/46 ,  H04N19/70 ,  H04N19/93

CPC classification number: H04N19/44 ,  H04N19/176 ,  H04N19/46 ,  H04N19/70 ,  H04N19/93

Abstract: A method of video encoding includes determining whether a plurality of constraint flags of a constraint information group are to be signaled for a subset of coding blocks, and signaling a gate flag indicating whether the plurality of constraint flags of the constraint information group are signaled. The gate flag is signaled in constraint information in a syntax structure of a coded video bitstream. In accordance with the signaled gate flag indicating that the plurality of constraint flags of the constraint information group are signaled, the method further includes signaling the plurality of constraint flags of the constraint information group in the constraint information in the syntax structure of the coded video bitstream. In accordance with the plurality of constraint flags being signaled in the constraint information, the method further includes encoding the subset of coding blocks based on the plurality of constraint flags.

公开(公告)号：US20240107075A1

公开(公告)日：2024-03-28

申请号：US18537345

申请日：2023-12-12

Applicant: TENCENT AMERICA LLC

Inventor： Byeongdoo CHOI ,  Stephan WENGER ,  Shan LIU

IPC: H04N19/70 ,  H04N19/167 ,  H04N19/172

CPC classification number: H04N19/70 ,  H04N19/167 ,  H04N19/172

Abstract: A method of video coding includes receiving video data comprising one or more subpictures, signaling, in a sequence parameter set, whether to use a network abstraction unit (NAL) layer identifier as a subpicture identifier, signaling the subpicture identifier in a NAL unit header when the sequence parameter set indicates to use the NAL layer identifier and signaling the subpicture identifier in a slice header when the sequence parameter set indicates not to use the NAL layer identifier, signaling a length of the subpicture identifier, and encoding the video data based on the subpicture identifier.

公开(公告)号：US20240089472A1

公开(公告)日：2024-03-14

申请号：US18514598

申请日：2023-11-20

Applicant: TENCENT AMERICA LLC

Inventor： Byeongdoo CHOI ,  Stephan WENGER ,  Shan LIU

IPC: H04N19/196 ,  H04N19/105 ,  H04N19/132 ,  H04N19/147 ,  H04N19/172

CPC classification number: H04N19/196 ,  H04N19/105 ,  H04N19/132 ,  H04N19/147 ,  H04N19/172

Abstract: A method of decoding an encoded video bitstream using at least one processor, including obtaining a first flag indicating whether a constant picture size is used in a coded video sequence including a current picture; based on the first flag indicating that the constant picture size is used, decoding the current picture without performing reference picture resampling; based on the first flag indicating that the constant picture size is not used, obtaining a second flag indicating whether a conformance window size is signaled; based on the second flag indicating that the conformance window size is signaled: obtaining the conformance window size, determining a resampling ratio between the current picture and a reference picture based on the conformance window size, and performing the reference picture resampling on the current picture using the resampling ratio.

公开(公告)号：US20240089461A1

公开(公告)日：2024-03-14

申请号：US18511360

申请日：2023-11-16

Applicant: TENCENT AMERICA LLC

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

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

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

Abstract: A method of video coding, executable by a processor, includes receiving video data having a coding tree unit size, determining whether the coding tree unit size is greater than a predetermined threshold, and in response to the coding tree unit size being greater than the predetermined threshold, signaling, in a sequence parameter set (SPS), a first flag indicating whether a maximum transform size in luma samples is equal to 64. The first flag being equal to 1 specifies that the maximum transform size in luma samples is equal to 64, the first flag equal to 0 specifies that the maximum transform size in luma samples is equal to 32, and when not present, the first flag is inferred to be equal to 0.

公开(公告)号：US20230388487A1

公开(公告)日：2023-11-30

申请号：US18310058

申请日：2023-05-01

Applicant: TENCENT AMERICA LLC

Inventor： Byeongdoo CHOI ,  Shan LIU ,  Stephan WENGER

IPC: H04N19/105 ,  H04N19/196 ,  H04N19/139 ,  H04N19/172 ,  H04N19/127 ,  H04N19/189 ,  H04N19/42

CPC classification number: H04N19/105 ,  H04N19/196 ,  H04N19/139 ,  H04N19/172 ,  H04N19/127 ,  H04N19/189 ,  H04N19/42

Abstract: A method, computer program, and computer system is provided for coding video data. Video data including a current picture and one or more other pictures is received. A first flag corresponding to whether the current picture is referenced by the one or more other pictures in a decoding order is checked. A second flag corresponding to whether the current picture is output; is checked. The video data is decoded based on values corresponding to the first flag and the second flag.