公开(公告)号：US20230034923A1

公开(公告)日：2023-02-02

申请号：US17949034

申请日：2022-09-20

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang

IPC: H04N19/88 ,  H04N19/169 ,  H04N19/176 ,  H04N19/70

Abstract: Methods and apparatus for processing of video are described. The processing includes video encoding, decoding, or transcoding. A 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 trailing subpicture that is associated with an intra random access point subpicture or a gradual decoding refresh subpicture follows the intra random access point subpicture or the gradual decoding refresh subpicture in an order.

公开(公告)号：US20230028609A1

公开(公告)日：2023-01-26

申请号：US17946624

申请日：2022-09-16

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang

IPC: H04N19/423 ,  H04N19/70 ,  H04N19/186 ,  H04N19/172

Abstract: Methods and apparatus for video processing, including coding and decoding, are described. One example video processing method includes performing a conversion between a video and a bitstream of the video according to a format rule, wherein the bitstream includes one or more output layer sets (OLSs), each OLS comprising one or more coded layer video sequences, and wherein the format rule specifies that a video parameter set indicates, for each of the one or more OLSs, a greatest allowed value of a chroma format indicator and/or a greatest allowed value of a bit depth used to represent pixels of the video.

公开(公告)号：US20230007253A1

公开(公告)日：2023-01-05

申请号：US17901270

申请日：2022-09-01

Applicant: Bytedance Inc.

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

IPC: H04N19/12 ,  H04N19/176 ,  H04N19/70 ,  H04N19/60 ,  H04N19/18

Abstract: Several techniques for video encoding and video decoding are described. One example method includes performing a conversion between a video block of a video and a bitstream of the video. The video block uses a low frequency non-separable transform for the conversion. The bitstream conforms to a format rule specifying that a syntax element is included at a syntax level for the bitstream. The syntax element is indicative of whether use of a scaling matrix which is derived from a reference scaling list is enabled for the video block. The syntax level is a sequence level, a picture level, or a slice level.

公开(公告)号：US20230007244A1

公开(公告)日：2023-01-05

申请号：US17944870

申请日：2022-09-14

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang

IPC: H04N19/105 ,  H04N19/109 ,  H04N19/31 ,  H04N19/174 ,  H04N19/159 ,  H04N19/169 ,  H04N19/503 ,  H04N19/172

Abstract: A video processing method includes performing a conversion between a video having one or more video layers including one or more video pictures and a bitstream of the video according to a rule. The rule specifies a condition under which no picture that has been generated by a decoding process for generating an unavailable reference picture is referred to by an active entry in a reference picture list of a current slice of a current picture.

公开(公告)号：US20220400279A1

公开(公告)日：2022-12-15

申请号：US17891603

申请日：2022-08-19

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang ,  Li Zhang

IPC: H04N19/46 ,  H04N19/70 ,  H04N19/169 ,  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 a general constraint information syntax structure, which comprises one or more constraint flags indicating constraints on an explicit weighted prediction being enabled for slices of a set of pictures, is present.

公开(公告)号：US20220377382A1

公开(公告)日：2022-11-24

申请号：US17860634

申请日：2022-07-08

Applicant: Bytedance Inc.

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

IPC: H04N19/70 ,  H04N19/91

Abstract: A method of video processing includes performing a conversion between a video including one or more pictures and a bitstream of the video, wherein the bitstream conforms to a format rule, wherein the format rule conditionally allows coding of a picture in one layer using reference pictures from other layers based on a first syntax element indicating whether the reference pictures from the other layers are present in the bitstream, and wherein the first syntax element is conditionally signaled in the bitstream based on a second syntax element that indicates whether an identifier of a parameter set associated with the picture is not equal to zero.

公开(公告)号：US20250106411A1

公开(公告)日：2025-03-27

申请号：US18974195

申请日：2024-12-09

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：US12238303B2

公开(公告)日：2025-02-25

申请号：US17964396

申请日：2022-10-12

Applicant: Bytedance Inc.

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

IPC: H04N19/105 ,  G06T7/33 ,  G06T7/73 ,  H04N19/107 ,  H04N19/136 ,  H04N19/169 ,  H04N19/172 ,  H04N19/174 ,  H04N19/30 ,  H04N19/70

Abstract: Methods and apparatus for video processing are described. The processing may include video encoding, video decoding, or video transcoding. An 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 one or more pictures and/or the one or more subpictures are included into the bitstream according to an order rule. The order rule specifies a relationship between a position of a current instantaneous decoder refresh (IDR) picture or a current IDR subpicture in the bitstream with respect to another picture referred to by an entry in a reference picture list for a current slice of the current IDR picture or the current IDR subpicture.

公开(公告)号：US12096009B2

公开(公告)日：2024-09-17

申请号：US18077866

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 comprises one or more supplemental enhancement information, SEI, network abstraction layer (NAL) units according to a rule, wherein the rule specifies that, responsive to an SEI NAL unit including a non-scalable-nested SEI message of a first payload type, the SEI NAL unit is disallowed to include another SEI message of a second payload type.

公开(公告)号：US12041257B2

公开(公告)日：2024-07-16

申请号：US17889887

申请日：2022-08-17

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang ,  Li Zhang

IPC: H04N19/46 ,  H04N19/105 ,  H04N19/169 ,  H04N19/172 ,  H04N19/174 ,  H04N19/186 ,  H04N19/70

CPC classification number: H04N19/46 ,  H04N19/105 ,  H04N19/172 ,  H04N19/174 ,  H04N19/186 ,  H04N19/188 ,  H04N19/70

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.