公开(公告)号：US20230044662A1

公开(公告)日：2023-02-09

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 ,  H04N19/169 ,  H04N19/174

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：US20230041260A1

公开(公告)日：2023-02-09

申请号：US17955856

申请日：2022-09-29

Applicant: Bytedance Inc.

Inventor： Li Zhang ,  Ye-kui Wang

IPC: H04N19/70 ,  H04N19/186 ,  H04N19/184

Abstract: Several techniques for video encoding and video decoding are described. One example method includes performing a conversion between a video picture of a video comprising one or more slices and a bitstream of the video picture according to a rule. The rule specifies that that whether a first syntax element indicating a usage of a coding tool is present at a first level is based on a syntax flag indicating whether a syntax structure of a second level is not present at the first level, wherein the second level is higher than the first level, and wherein the second level is the video picture level or higher than the video picture level.

公开(公告)号：US20230038277A1

公开(公告)日：2023-02-09

申请号：US17953937

申请日：2022-09-27

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang ,  Li Zhang

IPC: H04N19/70 ,  H04N19/46 ,  H04N19/159 ,  H04N19/169 ,  H04N19/172

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 and a bitstream of the video including one or more output layer sets according to a format rule. At least one of the one or more output layer sets consists of a trick mode access representation including only intra random access points pictures or only intra-coded pictures. The format rule specifies whether or how level information for the trick mode representation is indicated in the bitstream.

公开(公告)号：US12192529B2

公开(公告)日：2025-01-07

申请号：US18078662

申请日：2022-12-09

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang

IPC: H04N19/70 ,  H04N19/136 ,  H04N19/169 ,  H04N19/184 ,  H04N19/30 ,  H04N19/433 ,  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 comprising one or more output layer sets according to a rule, wherein the rule specifies that a supplemental enhancement information (SEI) network abstraction layer (NAL) unit that includes a scalable-nested SEI message carrying picture timing information is not included due to use of a same picture timing in all output layer sets in the bitstream.

公开(公告)号：US12108068B2

公开(公告)日：2024-10-01

申请号：US18077803

申请日：2022-12-08

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang

IPC: H04N19/46 ,  H04N19/105 ,  H04N19/169

CPC classification number: H04N19/46 ,  H04N19/105 ,  H04N19/188

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 network abstraction layer (NAL) units for multiple video layers according to a rule; wherein the rule defines a sub-bitstream extraction process by which NAL units are removed from the bitstream to generate an output bitstream, and wherein the rule specifies to remove all supplemental enhancement information (SEI) NAL units that contain a non-scalable-nested SEI message with a particular payload type, responsive to a list of NAL unit header layer identifier values in an output layer set (OLS) with a target OLS index not including all values of NAL unit header layer identifiers in all video coding layer (VCL) NAL units in the bitstream that is input to the sub-bitstream extraction process.

公开(公告)号：US20240137493A1

公开(公告)日：2024-04-25

申请号：US18528032

申请日：2023-12-04

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang

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

CPC classification number: H04N19/105 ,  H04N19/159 ,  H04N19/174 ,  H04N19/188

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：US20240107072A1

公开(公告)日：2024-03-28

申请号：US18523118

申请日：2023-11-29

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang

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

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

Abstract: Methods, devices and systems for signaling 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 signaled in the PPS, and a third syntax element, which indicates, in the PPS, a number of the subpictures.

公开(公告)号：US11943483B2

公开(公告)日：2024-03-26

申请号：US18079219

申请日：2022-12-12

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang

IPC: H04N9/70 ,  H04N19/105 ,  H04N19/109 ,  H04N19/136 ,  H04N19/169 ,  H04N19/172 ,  H04N19/174 ,  H04N19/184 ,  H04N19/30 ,  H04N19/31 ,  H04N19/42 ,  H04N19/503 ,  H04N19/70

CPC classification number: H04N19/70 ,  H04N19/105 ,  H04N19/109 ,  H04N19/136 ,  H04N19/172 ,  H04N19/174 ,  H04N19/184 ,  H04N19/188 ,  H04N19/30 ,  H04N19/31 ,  H04N19/42 ,  H04N19/503

Abstract: Methods, systems, and devices for picture output ordering constraints in video bitstreams are described. An example method of video processing includes performing a conversion between a video including one or more pictures and a bitstream of the video according to a rule, wherein the rule specifies that the bitstream includes at least a first picture that is output, wherein the first picture is in an output layer, wherein the first picture includes a syntax element equaling one, and wherein the syntax element affects a decoded picture output and a removal process associated with a hypothetical reference decoder (HRD).

公开(公告)号：US20240098282A1

公开(公告)日：2024-03-21

申请号：US18517283

申请日：2023-11-22

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 output layer sets comprising one or more video layers according to a rule, wherein the rule specifies a particular decoding order between a subpicture level information (SLI) supplemental enhancement information (SEI) message and a buffering period (BP) SEI message that apply to a particular output layer set, responsive to a condition that the SLI SEI message and the BP SEI message are included in an access unit.

公开(公告)号：US20240098273A1

公开(公告)日：2024-03-21

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

CPC classification number: 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.