公开(公告)号：US12058380B2

公开(公告)日：2024-08-06

申请号：US17953937

申请日：2022-09-27

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang ,  Li Zhang

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

CPC classification number: H04N19/70 ,  H04N19/159 ,  H04N19/172 ,  H04N19/188 ,  H04N19/46

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：US11997294B2

公开(公告)日：2024-05-28

申请号：US18077831

申请日：2022-12-08

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang

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

CPC classification number: H04N19/184 ,  H04N19/172 ,  H04N19/182 ,  H04N19/188 ,  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 network abstraction layer unit, SEI 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：US11985357B2

公开(公告)日：2024-05-14

申请号：US17860634

申请日：2022-07-08

Applicant: Bytedance Inc.

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

IPC: H04N19/70 ,  H04N19/105 ,  H04N19/159 ,  H04N19/169 ,  H04N19/174 ,  H04N19/184 ,  H04N19/187 ,  H04N19/44 ,  H04N19/46 ,  H04N19/82 ,  H04N19/91 ,  H04N19/117

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: 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 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：US20240146971A1

公开(公告)日：2024-05-02

申请号：US18320722

申请日：2023-05-19

Applicant: Bytedance Inc.

Inventor： Li Zhang ,  Ye-kui Wang

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

CPC classification number: H04N19/70 ,  H04N19/184 ,  H04N19/186

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：US11968405B2

公开(公告)日：2024-04-23

申请号：US17859826

申请日：2022-07-07

Applicant: Bytedance Inc.

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

IPC: H04N19/82 ,  H04N19/105 ,  H04N19/117 ,  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 including a picture and a bitstream of the video, wherein the bitstream conforms to a format rule, wherein the format rule specifies that an indication of whether a first flag is signalled at a beginning of a picture header associated with the picture, wherein the first flag is indicative of whether the picture is an intra random access point (IRAP) picture or a gradual decoding refresh (GDR) picture.

公开(公告)号：US11962790B2

公开(公告)日：2024-04-16

申请号：US17992181

申请日：2022-11-22

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang

IPC: H04N19/547 ,  H04N19/169 ,  H04N19/172 ,  H04N19/31 ,  H04N19/70

CPC classification number: H04N19/188 ,  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 one or more layers and a bitstream of the video according to a rule, wherein the rule specifies, in a process of sub-bitstream extraction to output an output sub-bitstream, whether to generate non-scalable nested supplementary enhancement information (SEI) messages by extracting scalable-nested SEI messages from a scalable nesting SEI message based on a first flag indicating whether the SEI message applies to specific output layer sets (OLSs) and a second flag indicating whether the SEI message applies to all subpictures or only to specific subpictures.

公开(公告)号：US20240121417A1

公开(公告)日：2024-04-11

申请号：US18527601

申请日：2023-12-04

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. The bitstream includes network abstraction layer (NAL) units for multiple video layers according to a rule. The rule defines a sub-bitstream extraction process by which NAL units are removed from the bitstream to generate an output bitstream, and 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：US11949899B2

公开(公告)日：2024-04-02

申请号：US17988934

申请日：2022-11-17

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang

IPC: H04N19/172 ,  H04N7/01 ,  H04N19/169 ,  H04N19/46 ,  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 conforms to a format rule. The bitstream includes one or more layers including one or more picture units (PUs). The format rule specifies that, responsive to a first PU in a layer of the bitstream following an end of sequence network abstraction layer (EOS NAL) unit in the layer in a decoding order, a variable of the first PU is set to a particular value, wherein the variable indicates whether the first PU is a coded layer video sequence start (CLVSS) PU.

公开(公告)号：US20240107069A1

公开(公告)日：2024-03-28

申请号：US18513114

申请日：2023-11-17

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang

IPC: H04N19/70 ,  H04N19/105 ,  H04N19/172 ,  H04N19/187 ,  H04N19/44

CPC classification number: H04N19/70 ,  H04N19/105 ,  H04N19/172 ,  H04N19/187 ,  H04N19/44

Abstract: A method of video processing includes performing a conversion between a video and a bitstream of the video. The bitstream includes one or more output layer sets each comprising one or more video layers. The bitstream conforms to a format rule, wherein the format rule specifies that a number of decoded picture buffer parameter syntax structures included in a video parameter set for the bitstream is equal to: zero, in a case that each output layer set includes a single video layer; or one plus a value of a syntax element, in a case that each output layer set includes a single layer is not true.

公开(公告)号：US20240107068A1

公开(公告)日：2024-03-28

申请号：US18511565

申请日：2023-11-16

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang ,  Li Zhang

IPC: H04N19/70 ,  H04N19/85

CPC classification number: H04N19/70 ,  H04N19/85

Abstract: Methods, systems, and devices for signaling of general constraint information 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. The rule specifies that a syntax structure in a profile-tier-level syntax structure is after a syntax element. The syntax structure includes information related to general constraint information (GCI) for the bitstream. The syntax element indicates a level to which an output layer set associated with the profile-tier-level syntax structure conforms.