公开(公告)号：US20230057986A1

公开(公告)日：2023-02-23

申请号：US17975023

申请日：2022-10-27

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang ,  Li Zhang

IPC: H04N19/105 ,  H04N19/174 ,  H04N19/172 ,  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：US20230034593A1

公开(公告)日：2023-02-02

申请号：US17957387

申请日：2022-09-30

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang ,  Li Zhang

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

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 comprising a picture in a video unit and a bitstream of the video according to a format rule. The format rule specifies that, responsive to a width of a picture being equal to a maximum allowed picture width in the video unit and a height of the picture being equal to a maximum allowed picture height in the video unit, a conformance window flag in a picture parameter set corresponding to the picture is set to a zero value.

公开(公告)号：US20230017513A1

公开(公告)日：2023-01-19

申请号：US17949064

申请日：2022-09-20

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang

IPC: H04N19/70 ,  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, wherein the bitstream conforms to a format rule that specifies a syntax of network abstraction layer (NAL) units in the bitstream, and wherein the format rule specifies that a NAL unit of a video coding layer (VCL) NAL unit type includes a content associated with a particular type of picture or a particular type of subpicture.

公开(公告)号：US20220377383A1

公开(公告)日：2022-11-24

申请号：US17860687

申请日：2022-07-08

Applicant: Bytedance Inc.

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

IPC: H04N19/70 ,  H04N19/105 ,  H04N19/184 ,  H04N19/187

Abstract: A method of video processing includes performing a conversion between a video and a bitstream of the video according to a rule, wherein the rule specifies that a first syntax element, which indicates a number of parameters for an output layer set (OLS) hypothetical reference decoder (HRD) in a video parameter set (VPS) associated with the video, is less than a first predetermined threshold.

公开(公告)号：US12301855B2

公开(公告)日：2025-05-13

申请号：US17891590

申请日：2022-08-19

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang ,  Li Zhang

IPC: H04N19/70 ,  H04N19/105 ,  H04N19/157 ,  H04N19/159 ,  H04N19/169 ,  H04N19/172 ,  H04N19/174 ,  H04N19/186 ,  H04N19/46 ,  H04N19/50 ,  H04N19/577 ,  H04N19/61

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：US12231698B2

公开(公告)日：2025-02-18

申请号：US18335317

申请日：2023-06-15

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang ,  Jizheng Xu

IPC: H04N19/00 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70 ,  H04N19/86

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 picture of a video and a bitstream of the video. A first syntax element in a first video unit level specifying a deblocking parameter offset for β divided by 2 applied to a chroma component for one or more slices in a first video unit and a second syntax element in the first video unit level specifying a deblocking parameter offset for tC divided by 2 applied to the chroma component for the one or more slices in the first video unit are determined according to a rule in response to the first syntax element and the second syntax element not included in the bitstream.

公开(公告)号：US12149706B2

公开(公告)日：2024-11-19

申请号：US17989339

申请日：2022-11-17

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：US20240187627A1

公开(公告)日：2024-06-06

申请号：US18400588

申请日：2023-12-29

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang ,  Li Zhang

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

CPC classification number: H04N19/46 ,  H04N19/172 ,  H04N19/174 ,  H04N19/184 ,  H04N19/70

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：US11973967B2

公开(公告)日：2024-04-30

申请号：US17989399

申请日：2022-11-17

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang

IPC: H04N19/46 ,  H04N7/01 ,  H04N19/169 ,  H04N19/172 ,  H04N19/70

CPC classification number: H04N19/46 ,  H04N7/01 ,  H04N19/172 ,  H04N19/188 ,  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. The bitstream includes one or more layers including one or more network abstraction layer (NAL) units according to a format rule that specifies that a first layer identifier in a header of an end of sequence network abstraction layer (EOS NAL) unit is required to be equal to a second layer identifier of one of the one or more layers in the bitstream.

公开(公告)号：US20240129545A1

公开(公告)日：2024-04-18

申请号：US18526488

申请日：2023-12-01

Applicant: Bytedance Inc.

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

IPC: H04N19/82 ,  H04N19/105 ,  H04N19/159 ,  H04N19/169 ,  H04N19/174 ,  H04N19/184 ,  H04N19/187 ,  H04N19/44 ,  H04N19/46 ,  H04N19/70 ,  H04N19/91

CPC classification number: H04N19/82 ,  H04N19/105 ,  H04N19/159 ,  H04N19/174 ,  H04N19/184 ,  H04N19/187 ,  H04N19/188 ,  H04N19/44 ,  H04N19/46 ,  H04N19/70 ,  H04N19/91 ,  H04N19/117

Abstract: A method of video processing includes performing a conversion between a video and a bitstream of the video according to a rule. The rule specifies that a sub-bitstream extraction process is implemented to generate a sub-bitstream for decoding. The sub-bitstream extraction process is configured to extract, from the bitstream, a sub-bitstream with a target highest temporal identifier. The rule specifies that, during the extracting, upon removing a video coding layer (VCL) network abstraction layer (NAL) unit, filler data units and filler supplemental enhancement information (SEI) messages in SEI NAL units that are associated with the VCL NAL unit are also removed.