公开(公告)号：US20220400290A1

公开(公告)日：2022-12-15

申请号：US17889887

申请日：2022-08-17

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang ,  Li Zhang

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

Abstract: A method includes performing a conversion, according to a rule, between a current slice of a current picture of a video and a bitstream of the video, wherein the rule specifies that a first syntax element of a picture parameter set (PPS) and a second syntax element of the PPS control whether a third syntax element is included in the bitstream, and wherein the first syntax element indicates whether a weighted prediction is enabled for bi-directional slices of coded pictures referring to the PPS, the second syntax element indicates whether information related to the weighted prediction is present in picture headers or slice headers of coded pictures referring to the PPS, and the third syntax element indicates a number of weights associated with a reference picture list 1 of the current slice.

公开(公告)号：US20220400278A1

公开(公告)日：2022-12-15

申请号：US17891590

申请日：2022-08-19

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang ,  Li Zhang

IPC: H04N19/46 ,  H04N19/70 ,  H04N19/105 ,  H04N19/186 ,  H04N19/174

Abstract: A method includes performing a conversion between a current slice of a current picture of a video and a bitstream of the video, wherein the bitstream conforms to a format rule, and wherein the format rule specifies that values of a plurality of syntax elements indicative of whether prediction weights are included in a slice header of the current slice are inferred based on a slice type of the current slice and a value of a first flag included in a picture parameter set (PPS) referred to by the current picture.

公开(公告)号：US20220385898A1

公开(公告)日：2022-12-01

申请号：US17856631

申请日：2022-07-01

Applicant: Bytedance Inc.

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

IPC: H04N19/117 ,  H04N19/157 ,  H04N19/70 ,  H04N19/136 ,  H04N19/186 ,  H04N19/174 ,  H04N19/172

Abstract: A method of video processing comprises performing a conversion between a video unit of a video and a bitstream of the video according to a rule, wherein the rule specifies that whether a cross-component adaptive loop filter (CC-ALF) mode and an adaptive loop filter (ALF) mode are enabled for coding the video unit are indicated in the bitstream in a mutually independent manner.

公开(公告)号：US20220377361A1

公开(公告)日：2022-11-24

申请号：US17859733

申请日：2022-07-07

Applicant: Bytedance Inc.

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

IPC: H04N19/44 ,  H04N19/70

Abstract: Methods, devices and systems for video coding and encoding, which include constraints, restrictions and signaling for subpictures, slices, and tiles, are described. One example method of video processing includes performing a conversion between a video and a bitstream of the video, wherein the bitstream comprises one or more access units according to a format rule, and wherein the format rule specifies an order in which a first message and a second message that apply to an operation point (OP) are present within an access unit (AU) such that the first message precedes the second message in a decoding order.

公开(公告)号：US12301841B2

公开(公告)日：2025-05-13

申请号：US18516468

申请日：2023-11-21

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang

IPC: H04N19/184 ,  H04N19/169 ,  H04N19/172 ,  H04N19/182 ,  H04N19/30 ,  H04N19/597 ,  H04N19/70

Abstract: A method of video data processing includes performing a conversion between a video and a bitstream of the video. The bitstream comprises multiple layers comprising one or more subpictures according to a rule which specifies that, during a subpicture sub-bitstream extraction process by which an output bitstream is extracted from the bitstream, a supplemental enhancement information (SEI) network abstraction layer (NAL) unit that includes a scalable nested SEI message that is not applicable to the output bitstream is omitted in the output bitstream.

公开(公告)号：US20250150635A1

公开(公告)日：2025-05-08

申请号：US19016850

申请日：2025-01-10

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang

IPC: H04N19/70 ,  H04N19/169 ,  H04N19/172 ,  H04N19/174 ,  H04N19/184 ,  H04N19/46

Abstract: Methods, devices and systems for signalling the use of subpictures in coded video pictures are described. One example method of video processing includes performing a conversion between a video and a bitstream of a video, wherein the bitstream conforms to a format rule, and wherein the format rule specifies that a first syntax element, which indicates whether a picture of the video can be partitioned, is conditionally included in a picture parameter set (PPS) of the bitstream based on values of a second syntax element, which indicates whether identifiers of subpictures are signalled in the PPS, and a third syntax element, which indicates, in the PPS, a number of the subpictures.

公开(公告)号：US12231653B2

公开(公告)日：2025-02-18

申请号：US18517328

申请日：2023-11-22

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang ,  Li Zhang

IPC: H04N19/157 ,  H04N19/103 ,  H04N19/105 ,  H04N19/136 ,  H04N19/172 ,  H04N19/174 ,  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：US12192493B2

公开(公告)日：2025-01-07

申请号：US18488692

申请日：2023-10-17

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang

IPC: H04N19/169 ,  H04N19/172 ,  H04N19/31 ,  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 video including multiple layers and a bitstream of the video according to a rule, wherein the rule specifies that, in a first process of sub-bitstream extraction to output a first output sub-bitstream, the first output sub-bitstream is extracted without removing network abstraction layer (NAL) units of a particular type and having a particular NAL unit header identifier value, and wherein the particular type includes an access unit delimiter (AUD) NAL unit.

公开(公告)号：US12126820B2

公开(公告)日：2024-10-22

申请号：US18077810

申请日：2022-12-08

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang

IPC: H04N19/184 ,  H04N19/136 ,  H04N19/169 ,  H04N19/30 ,  H04N19/433 ,  H04N19/46 ,  H04N19/70

CPC classification number: H04N19/184 ,  H04N19/136 ,  H04N19/188 ,  H04N19/30 ,  H04N19/433 ,  H04N19/46 ,  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 video and a bitstream of the video, wherein the bitstream includes one or more output layer sets comprising one or more video layers according to a format rule, wherein the format rule specifies that a non-scalable-nested supplemental enhancement information, SEI, message that includes information regarding hypothetical reference decoder, HRD, is applicable to all output layer sets that include same video layers as the bitstream.

公开(公告)号：US12075096B2

公开(公告)日：2024-08-27

申请号：US17990273

申请日：2022-11-18

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang ,  Li Zhang

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

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

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.