公开(公告)号：US11818338B2

公开(公告)日：2023-11-14

申请号：US17975023

申请日：2022-10-27

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang ,  Li Zhang

IPC: H04N19/105 ,  H04N19/172 ,  H04N19/174 ,  H04N19/70

CPC classification number: H04N19/105 ,  H04N19/172 ,  H04N19/174 ,  H04N19/70

Abstract: Methods and apparatus for processing of video are described. A video processing method includes performing a conversion between a video including multiple layers of one or more pictures and a bitstream of the video according to a format rule. The format rule specifies that a reference picture referred to by each inter-layer reference picture entry in a reference picture list of a slice of a current picture of a current layer satisfies a constraint. The constraint is at least one of: (a) the reference picture is an intra random access (IRAP) picture or (b) the reference picture has a temporal identifier that is less than or equal to a certain value that is a function of a maximum allowed value of a video layer to which slices from the current layer can reference. The maximum allowed value is indicated in a syntax element.

公开(公告)号：US11778220B2

公开(公告)日：2023-10-03

申请号：US17845536

申请日：2022-06-21

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang

IPC: H04N19/105 ,  H04N19/46 ,  H04N19/70 ,  H04N19/187

CPC classification number: H04N19/70 ,  H04N19/105 ,  H04N19/187 ,  H04N19/46

Abstract: A method of video processing includes performing a conversion between a video comprising a plurality of video layers and a bitstream of the video, wherein the bitstream comprises a plurality of output layer sets (OLSs), each of which comprises one or more of the plurality of video layers, and the bitstream conforms to a format rule, wherein the format rule specifies that, for a layer i, where i is an integer, the bitstream includes a set of first syntax element indicative of a first variable indicating whether the layer i is included in at least one of the plurality of OLSs.

公开(公告)号：US20230291898A1

公开(公告)日：2023-09-14

申请号：US18322428

申请日：2023-05-23

Applicant: Bytedance Inc.

Inventor： Weijia Zhu ,  Li Zhang ,  Jizheng Xu ,  Kai Zhang ,  Ye-kui Wang

IPC: H04N19/117 ,  H04N19/176 ,  H04N19/174 ,  H04N19/80 ,  H04N19/186 ,  H04N19/70

CPC classification number: H04N19/117 ,  H04N19/176 ,  H04N19/174 ,  H04N19/80 ,  H04N19/186 ,  H04N19/70

Abstract: An example method of video processing includes applying, in a conversion between a video comprising multiple components and a bitstream representation of the video, a deblocking filter to video blocks of the multiple components. A deblocking filter strength for the deblocking filter of each of the multiple components is determined according to a rule that specifies to use a different manner for determining the deblocking filter strength for the video blocks of each of the multiple components.

公开(公告)号：US11700390B2

公开(公告)日：2023-07-11

申请号：US17845400

申请日：2022-06-21

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang

IPC: H04N19/46 ,  H04N19/159 ,  H04N19/174 ,  H04N19/169 ,  H04N19/172 ,  H04N19/184 ,  H04N19/187 ,  H04N19/70 ,  H04N19/105

CPC classification number: H04N19/46 ,  H04N19/105 ,  H04N19/159 ,  H04N19/172 ,  H04N19/174 ,  H04N19/184 ,  H04N19/187 ,  H04N19/188 ,  H04N19/70

Abstract: A method of video processing includes performing a conversion between a video including a plurality of video layers and a bitstream of the video, wherein the bitstream includes a plurality of output layer sets (OLSs), each including one or more of the plurality of video layers, and the bitstream conforms to a format rule, wherein the format rule specifies that, for an OLS having a single layer, a profile-tier-level (PTL) syntax structure that indicates a profile, a tier and a level for the OLS is included in a video parameter set for the bitstream, and the PTL syntax structure for the OLS is also included in a sequence parameter set coded in the bitstream.

公开(公告)号：US20230113601A1

公开(公告)日：2023-04-13

申请号：US18078641

申请日：2022-12-09

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang

IPC: H04N19/70 ,  H04N19/172 ,  H04N19/169 ,  H04N19/30

Abstract: A method of processing video data includes performing a conversion between a video and a bitstream of the video. The bitstream comprises one or more layers comprising one or more pictures comprising one or more subpictures according to a rule which specifies that, responsive to a condition, a selective processing of a first supplemental enhancement information network abstraction layer, SEI NAL, unit of a target output subpicture sub-bitstream that is extracted during a subpicture sub-bitstream extraction process

公开(公告)号：US20230099238A1

公开(公告)日：2023-03-30

申请号：US18076906

申请日：2022-12-07

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang

IPC: H04N19/46 ,  H04N19/70 ,  H04N19/187

Abstract: Several techniques for video encoding and video decoding are described. An example method of processing video data includes performing a conversion between a video including one or more subpictures and a bitstream of the video according to a format rule, wherein the format rule specifies that a first syntax element in a scalable nesting supplemental enhancement information message in the bitstream is set to a particular value in response to the scalable nesting supplemental enhancement information message including one or more subpicture level information supplemental enhancement information messages, and wherein the particular value of the first syntax element indicates that the scalable nesting supplemental enhancement information message includes one or more scalable-nested supplemental enhancement information messages that apply to a specific output video layer set.

公开(公告)号：US20230084006A1

公开(公告)日：2023-03-16

申请号：US17989409

申请日：2022-11-17

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang ,  Li Zhang

IPC: H04N19/157 ,  H04N19/174 ,  H04N19/70 ,  H04N19/103 ,  H04N19/136

Abstract: Examples of video encoding methods and apparatus and video decoding methods and apparatus are described. An example method of video processing includes performing a conversion between a video comprising a video picture comprising a slice and a bitstream of the video according to a rule. The rule specifies that a default value of a syntax element specifying a number of entries in a reference picture list syntax structure associated with a reference picture list (RPL) index is equal to 0 due to a condition being satisfied. The condition is satisfied in case (1) the video picture is an instantaneous decoding refresh picture, (2) a first syntax flag specifies that RPL syntax elements are not present in a slice header of the slice, and (3) a second syntax flag specifies that RPL information is not present in a picture header of the video picture.

公开(公告)号：US20230059682A1

公开(公告)日：2023-02-23

申请号：US17969976

申请日：2022-10-20

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/169 ,  H04N19/174

Abstract: Methods and apparatus for processing of video are described. The processing may include video encoding, decoding, or transcoding. One example video processing method includes performing a conversion between a video including one or more pictures including one or more subpictures and a bitstream of the video. The bitstream conforms to a format rule that specifies that a subpicture cannot be a random access type of subpicture in response to the subpicture not being a leading subpicture of an intra random access point subpicture. The leading subpicture precedes the intra random access point subpicture in output order.

公开(公告)号：US20230052835A1

公开(公告)日：2023-02-16

申请号：US17957375

申请日：2022-09-30

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang ,  Li Zhang

IPC: H04N19/70 ,  H04N19/174 ,  H04N19/184

Abstract: Methods and apparatus for video processing are described. The video processing may include video encoding, video decoding or video transcoding. One example video processing method includes performing a conversion between a video including one or more pictures including one or more slices and a coded representation of the video, wherein the coded representation conforms to a format rule that specifies that a condition of a field in the coded representation controls a constraint on a slice type or whether the slice type is included in the coded representation for a video slice, wherein the field includes a general constraint flag, a network abstraction layer unit type or whether the video slice is in a first video picture of an access unit.

公开(公告)号：US20230047030A1

公开(公告)日：2023-02-16

申请号：US17957882

申请日：2022-09-30

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang ,  Li Zhang

IPC: H04N19/70 ,  H04N19/52 ,  H04N19/172 ,  H04N19/174 ,  H04N19/132 ,  H04N19/96 ,  H04N19/33 ,  H04N19/105

Abstract: Methods, devices and systems for video coding and encoding, which include conforming to constraints on collocated pictures, are described. One example method of video processing includes performing a conversion between a video including a current picture and a bitstream of the video, wherein the bitstream conforms to a format rule, and wherein the format rule specifies that the bitstream includes a flag for disabling a use of a temporal motion vector prediction tool for the current picture based on whether a reference picture in a decoded picture buffer has a spatial resolution and a scaling window offset that are identical to that of the current picture.