公开(公告)号：US11917172B2

公开(公告)日：2024-02-27

申请号：US18076886

申请日：2022-12-07

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang

IPC: H04N19/423 ,  H04N19/132 ,  H04N19/174 ,  H04N19/105 ,  H04N19/152

CPC classification number: H04N19/423 ,  H04N19/105 ,  H04N19/132 ,  H04N19/152 ,  H04N19/174

Abstract: Methods, systems and devices for implementing constraints used in video encoding and video decoding are described. An example method of video processing includes performing a conversion between a video including one or more pictures including one or more slices and a bitstream of the video, wherein the bitstream is organized into a plurality of access units (AUs), AU 0 to AU n, based on a format rule, where n is a positive integer, wherein the format rule specifies a relationship between removal times of each of the plurality of AUs from a coded picture buffer (CPB) during decoding and a number of slices in the each of the plurality of AUs.

公开(公告)号：US20240040138A1

公开(公告)日：2024-02-01

申请号：US18479946

申请日：2023-10-03

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang

IPC: H04N19/46 ,  H04N19/105 ,  H04N19/172 ,  H04N19/70 ,  H04N19/169 ,  H04N19/423

CPC classification number: H04N19/46 ,  H04N19/105 ,  H04N19/172 ,  H04N19/70 ,  H04N19/188 ,  H04N19/423

Abstract: Methods, systems, and devices for signaling picture information in access units in video bitstream processing are disclosed. An example method of video processing includes performing a conversion between a video comprising one or more pictures and a bitstream of the video. The bitstream conforms to a format rule, which specifies that a flag and a syntax element, when included in the bitstream, are access unit (AU) specific. The flag indicates, in response to a current AU not being a first AU in the bitstream in a decoding order, whether a nominal coded picture buffer (CPB) removal time of the current AU is determined relative to (a) a nominal CPB removal time of a previous AU associated with a buffering period supplemental enhancement information (SEI) message, or (b) a nominal CPB removal time of the current AU.

公开(公告)号：US11876995B2

公开(公告)日：2024-01-16

申请号：US17839860

申请日：2022-06-14

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 comprising one or more scalable video layers and a bitstream of the video. The video comprises one or more video pictures comprising one or more slices. The bitstream conforms to a format rule. The format rule specifies that a value of a field indicative of a slice type of a slice is set to indicate a type of intra slice in case that a corresponding network abstraction layer unit type is in a predetermined range and that a corresponding video layer flag indicates that a video layer containing the slice does not use inter-layer prediction.

公开(公告)号：US11863796B2

公开(公告)日：2024-01-02

申请号：US17949058

申请日：2022-09-20

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang

IPC: H04N19/70 ,  H04N19/174 ,  H04N19/169 ,  H04N19/105 ,  H04N19/46 ,  H04N19/103 ,  H04N19/136 ,  H04N19/157 ,  H04N19/172 ,  H04N19/176 ,  H04N19/88

CPC classification number: H04N19/70 ,  H04N19/103 ,  H04N19/105 ,  H04N19/136 ,  H04N19/157 ,  H04N19/172 ,  H04N19/174 ,  H04N19/176 ,  H04N19/188 ,  H04N19/46 ,  H04N19/88

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 a current picture including a current subpicture including a current slice and a bitstream of the video. The bitstream conforms to a format rule that disallows an active entry in a reference picture list of the current slice from including a first picture that precedes in a decoding order a second picture that includes a step-wise temporal sublayer access subpicture in response to conditions associated with at least the first picture and the current subpicture.

公开(公告)号：US11812063B2

公开(公告)日：2023-11-07

申请号：US17957139

申请日：2022-09-30

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang ,  Li Zhang ,  Kai Zhang

IPC: H04N19/70 ,  H04N19/172 ,  H04N19/174 ,  H04N19/169

CPC classification number: H04N19/70 ,  H04N19/172 ,  H04N19/174 ,  H04N19/188

Abstract: A video processing method includes performing a conversion between a video comprising one or more pictures and a bitstream of the video according to a format rule. The format rule specifies that, in response to satisfying one or more conditions, a syntax element indicating whether a first syntax structure providing a profile, a tier and a level information and a second syntax structure providing decoded picture buffer information are present in a sequence parameter set is set to be equal to 1 to indicate that the first syntax structure and the second syntax structure are present in the sequence parameter set.

公开(公告)号：US20230246834A1

公开(公告)日：2023-08-03

申请号：US18191972

申请日：2023-03-29

Applicant: Bytedance Inc.

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

IPC: H04L9/30 ,  H04N21/2347 ,  H04L9/06

CPC classification number: H04L9/30 ,  H04N21/2347 ,  H04L9/0643

Abstract: Methods, systems, and devices for media processing are described. One example method of processing digital media includes performing a conversion between a media segment and a bitstream of the media segment, the conversion conforming to a format rule and an encryption rule, and the format rule specifying that an indication of an integrity of a portion of the media segment is signaled in the bitstream. In an example, the media segment is a video segment, an audio segment, or an image.

公开(公告)号：US20230128511A1

公开(公告)日：2023-04-27

申请号：US17994748

申请日：2022-11-28

Applicant: Bytedance Inc.

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

IPC: H04N19/70 ,  H04N19/105 ,  H04N19/186 ,  H04N19/172

Abstract: Embodiments for video encoding and video decoding are described. One example method includes performing a conversion between a video and a bitstream of the video according to a rule, wherein the rule specifies that only one of two conditions is true when a number of subpictures minus 1 indicated by a first syntax element in a sequence parameter set is greater than zero and when a current subpicture with a subpicture index subpicIdx of a first video picture of the video has a second syntax element in the sequence parameter set indicates that a subpicture with the subpicture index subpicIdx of each video picture of the video in a coded layer video sequence is treated as a video picture in a decoding process that excludes an in-loop filtering operation.

公开(公告)号：US20230112461A1

公开(公告)日：2023-04-13

申请号：US17989339

申请日：2022-11-17

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang ,  Li Zhang

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

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 current picture of a video and a bitstream of the video according to a rule. The rule specifies that responsive to a picture being referred to by an inter-layer reference picture (ILRP) entry in a reference picture list of a slice of the current picture, the picture is allowed to have a gradual decoding refresh (GDR) type and a syntax element specifying a recovery point of the picture in an output order is 0.

公开(公告)号：US20230111484A1

公开(公告)日：2023-04-13

申请号：US17990273

申请日：2022-11-18

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang ,  Li Zhang

IPC: H04N19/70 ,  H04N19/46 ,  H04N19/169 ,  H04N19/172

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 and a bitstream of the video according to a rule. At least one of the one or more parameter sets of the bitstream includes a general syntax structure including timing and hypothetical reference decoder (HRD) parameters. The rule specifies that a first syntax flag is not included in the general syntax structure in response to (1) a second syntax flag specifying that network abstraction layer (NAL) HRD parameters are not present in the general syntax structure, and (2) a third syntax flag specifying that video coding layer (VCL) HRD parameters are not present in the general syntax structure, where the first syntax flag specifies that same picture-level timing information applies to all output layer sets in the bitstream.

公开(公告)号：US20230091220A1

公开(公告)日：2023-03-23

申请号：US17990945

申请日：2022-11-21

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang

IPC: H04N19/423 ,  H04N19/70 ,  H04N19/46 ,  H04N19/172

Abstract: Methods, systems and devices for signaling picture information in access units in video bitstream processing are disclosed. An example method of video processing includes performing a conversion between a video comprising one or more pictures and a bitstream of the video, wherein the bitstream conforms to a format rule, wherein the format rule specifies that a flag and a syntax element, when included in the bitstream, are access unit (AU) specific, and wherein the flag indicates, in response to a current AU not being a first AU in the bitstream in a decoding order, whether a nominal coded picture buffer (CPB) removal time of the current AU is determined relative to (a) a nominal CPB removal time of a previous AU associated with a buffering period supplemental enhancement information (SEI) message, or (b) a nominal CPB removal time of the current AU.