公开(公告)号：US12155852B2

公开(公告)日：2024-11-26

申请号：US18300102

申请日：2023-04-13

Applicant: TENCENT AMERICA LLC

Inventor： Byeongdoo Choi ,  Shan Liu ,  Stephan Wenger

IPC: H04N19/13 ,  H04N19/187 ,  H04N19/30 ,  H04N19/44

Abstract: A method of decoding may comprise: receiving a bitstream comprising compressed video/image data; parsing or deriving, from the bitstream, an output layer set mode indicator in a video parameter set (VPS); identifying output layer set signaling based on the output layer set mode indicator; identifying one or more picture output layers based on the identified output layer set signaling; and decoding the identified one or more picture output layers.

公开(公告)号：US12052431B2

公开(公告)日：2024-07-30

申请号：US17889061

申请日：2022-08-16

Applicant: TENCENT AMERICA LLC

Inventor： Byeongdoo Choi ,  Stephan Wenger ,  Shan Liu

IPC: H04N19/44 ,  H04N19/105 ,  H04N19/132 ,  H04N19/169 ,  H04N19/172 ,  H04N19/33 ,  H04N19/46

CPC classification number: H04N19/44 ,  H04N19/105 ,  H04N19/132 ,  H04N19/172 ,  H04N19/1883 ,  H04N19/33 ,  H04N19/46

Abstract: A method, device, and non-transitory computer-readable medium for decoding an encoded video bitstream using at least one processor, including, obtaining from the encoded video bitstream a first flag indicating that reference picture resampling is enabled for coded video sequence (CVS); determining a value of a second flag indicating whether a picture resolution is changed in the CVS; based on the value of the second flag indicating that the picture resolution is changed in the CVS, decoding the CVS using the reference picture resampling for spatial scalability and adaptive resolution change (ARC); and based on the value of the second flag indicating that the picture resolution is not changed in the CVS, decoding the CVS using the reference picture resampling for the spatial scalability, and without using the reference picture resampling for the ARC.

公开(公告)号：US20240129477A1

公开(公告)日：2024-04-18

申请号：US18533692

申请日：2023-12-08

Applicant: TENCENT AMERICA LLC

Inventor： Byeongdoo Choi ,  Stephan Wenger ,  Shan Liu

IPC: H04N19/132 ,  H04N19/146 ,  H04N19/172 ,  H04N19/189

CPC classification number: H04N19/132 ,  H04N19/146 ,  H04N19/172 ,  H04N19/189

Abstract: There is included a method and apparatus comprising computer code configured to cause a processor or processors to perform acquiring an input bitstream comprising metadata and video data, decoding the video data, determining whether the metadata comprises at least one flag signaling at least one component of a picture size of at least one picture of the video data, and signaling, in a case where it is determined that the metadata comprises the at least one flag, a display device to display the at least one picture from the video data according to the at least one flag.

公开(公告)号：US11956457B2

公开(公告)日：2024-04-09

申请号：US17965203

申请日：2022-10-13

Applicant: TENCENT AMERICA LLC

Inventor： Byeongdoo Choi ,  Stephan Wenger ,  Shan Liu

IPC: H04N19/46 ,  H04N19/105 ,  H04N19/159 ,  H04N19/169 ,  H04N19/172

CPC classification number: H04N19/46 ,  H04N19/105 ,  H04N19/159 ,  H04N19/172 ,  H04N19/188

Abstract: Systems and methods for decoding a coded video stream are provided. A method includes receiving a coded video stream that includes an access unit, including a picture; signaling a first flag that indicates whether the access unit includes either or neither one from among an intra random access point (IRAP) picture and a gradual decoding refresh (GDR) picture; signaling a second flag that indicates whether the picture is the IRAP picture; and decoding the picture, as a current picture, based on the signaling of the first flag and the second flag, wherein a value of the first flag and a value of the second flag are aligned.

公开(公告)号：US11943446B2

公开(公告)日：2024-03-26

申请号：US18122158

申请日：2023-03-16

Applicant: TENCENT AMERICA LLC

Inventor： Byeongdoo Choi ,  Stephan Wenger ,  Shan Liu

IPC: H04N19/132 ,  H04N19/146 ,  H04N19/172 ,  H04N19/184 ,  H04N19/196

CPC classification number: H04N19/132 ,  H04N19/146 ,  H04N19/172 ,  H04N19/184 ,  H04N19/196

Abstract: A method, device, and computer-readable medium for decoding an encoded video bitstream using at least one processor, including obtaining a flag indicating that a conformance window is not used for reference picture resampling; based on the flag indicating that the conformance window is not used for the reference picture resampling, determining whether a resampling picture size is signaled; based on determining that the resampling picture size is signaled, determining a resampling ratio based on the resampling picture size; based on determining that the resampling picture size is not signaled, determining the resampling ratio based on an output picture size; and performing the reference picture resampling on a current picture using the resampling ratio.

公开(公告)号：US11936891B2

公开(公告)日：2024-03-19

申请号：US17582570

申请日：2022-01-24

Applicant: TENCENT AMERICA LLC

Inventor： Byeongdoo Choi ,  Shan Liu ,  Stephan Wenger

IPC: H04N19/44 ,  H04N19/503

CPC classification number: H04N19/44 ,  H04N19/503

Abstract: A method and system for decoding a coded video sequence may include obtaining the coded video sequence, and decoding the coded video sequence. A value of a temporal sublayer identifier of a video coding layer (VCL) network abstraction layer (NAL) unit in the coded video sequence is constrained to be less than or equal to a value of vps_max_sublayers_minus1, that specifies a maximum number of temporal sublayers that may be present in a layer in each coded video sequence referring to the video parameter set (VPS), in the VPS referred to by the VCL NAL unit.

公开(公告)号：US11936880B2

公开(公告)日：2024-03-19

申请号：US17010028

申请日：2020-09-02

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 coding a video sequence. Video information corresponding to one or subpictures within a picture is received. A first subpicture is identified from among the one or more subpictures as a region of interest. The first subpicture corresponding to the region of interest is encoded in a high quality mode. One or more other subpictures from among the one or more subpictures is encoded in a low quality mode. The first encoded subpicture and the encoded one or more other subpictures are output with one or more output layer sets.

公开(公告)号：US11930217B2

公开(公告)日：2024-03-12

申请号：US17828833

申请日：2022-05-31

Applicant: TENCENT AMERICA LLC

Inventor： Byeongdoo Choi ,  Stephan Wenger ,  Shan Liu

IPC: H04N19/46 ,  H04N19/105 ,  H04N19/132 ,  H04N19/172 ,  H04N19/186 ,  H04N19/513 ,  H04N19/70 ,  H04N19/80

CPC classification number: H04N19/70 ,  H04N19/105 ,  H04N19/132 ,  H04N19/172 ,  H04N19/186 ,  H04N19/46 ,  H04N19/513 ,  H04N19/80

Abstract: A method, computer program, and computer system is provided for video coding. The method may include decoding coded syntax elements corresponding to a wrap-around padding process based on shifting a reference block by a width value that is determined based on luma samples in the reference block; and reconstructing at least one coded current picture using the wrap-around padding process, wherein the wrap-around padding process is applied at boundaries of subpictures.

公开(公告)号：US11882312B2

公开(公告)日：2024-01-23

申请号：US17837776

申请日：2022-06-10

Applicant: TENCENT AMERICA LLC

Inventor： Stephan Wenger ,  Byeongdoo Choi ,  Shan Liu

IPC: H04N19/70 ,  H04N19/169

CPC classification number: H04N19/70 ,  H04N19/188

Abstract: An approach for reconstructing a Network Abstraction Layer (NAL) unit for video decoding using at least one processor includes decoding a first syntax element included in a NAL unit header; determining, based on the first syntax element, a NAL unit class including a plurality of NAL unit types; decoding a second syntax element included in the NAL unit header; and based on the NAL unit class being a first NAL unit class, determining a NAL unit type from among the NAL unit types using a combination of the NAL unit class and the second syntax element, and reconstructing the NAL unit based on the determined NAL unit type; and based on the NAL unit class being a second NAL unit class, determining a temporal identifier (TID) based on the second syntax element, and reconstructing the NAL unit based on the determined TID.

公开(公告)号：US11863792B2

公开(公告)日：2024-01-02

申请号：US17026748

申请日：2020-09-21

Applicant: TENCENT AMERICA LLC

Inventor： Ling Li ,  Xiaozhong Xu ,  Byeongdoo Choi ,  Xiang Li ,  Stephan Wenger ,  Shan Liu

IPC: H04N19/70 ,  H04N19/159 ,  H04N19/174

CPC classification number: H04N19/70 ,  H04N19/159 ,  H04N19/174

Abstract: A method, computer program, and computer system for encoding or decoding video data, and indicating, with a syntax element, types of slices for all slices of a coded picture, the syntax element being coded using an unsigned integer.