公开(公告)号：US11997301B2

公开(公告)日：2024-05-28

申请号：US18077901

申请日：2022-12-08

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang

IPC: H04N19/46 ,  H04N19/169 ,  H04N19/172 ,  H04N19/187 ,  H04N19/70

CPC classification number: H04N19/46 ,  H04N19/172 ,  H04N19/187 ,  H04N19/188 ,  H04N19/70

Abstract: Several techniques for video encoding and video decoding are described. An example method of processing video data includes performing a conversion between a video and a bitstream of the video, wherein the conversion is performed according to a format rule that specifies that a supplemental enhancement information network abstraction layer unit includes a network abstraction layer unit type equal to a prefix supplemental enhancement information network abstraction layer unit type in response to the supplemental enhancement information network abstraction layer unit including a scalable nesting supplemental enhancement information message that includes a supplemental enhancement information message not associated with a particular payload type.

公开(公告)号：US11979561B2

公开(公告)日：2024-05-07

申请号：US17946335

申请日：2022-09-16

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang

IPC: H04N19/172 ,  H04N19/105 ,  H04N19/109 ,  H04N19/159 ,  H04N19/169 ,  H04N19/174 ,  H04N19/31 ,  H04N19/46 ,  H04N19/503

CPC classification number: H04N19/105 ,  H04N19/109 ,  H04N19/159 ,  H04N19/172 ,  H04N19/174 ,  H04N19/188 ,  H04N19/31 ,  H04N19/46 ,  H04N19/503

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 format rule. The format rule specifies that a first video picture is an associated intra random access point picture of a second picture and that the second picture are constrained to belong to a same video layer.

公开(公告)号：US20240129541A1

公开(公告)日：2024-04-18

申请号：US18525057

申请日：2023-11-30

Applicant: Bytedance Inc.

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

IPC: H04N19/70 ,  H04N19/105 ,  H04N19/172 ,  H04N19/186

CPC classification number: H04N19/70 ,  H04N19/105 ,  H04N19/172 ,  H04N19/186

Abstract: Embodiments for video encoding and video decoding are described. One example method includes performing a conversion between a video and a bitstream of the video according to a rule, wherein the rule specifies that only one of two conditions is true when a number of subpictures minus 1 indicated by a first syntax element in a sequence parameter set is greater than zero and when a current subpicture with a subpicture index subpicIdx of a first video picture of the video has a second syntax element in the sequence parameter set indicates that a subpicture with the subpicture index subpicIdx of each video picture of the video in a coded layer video sequence is treated as a video picture in a decoding process that excludes an in-loop filtering operation.

公开(公告)号：US20240121389A1

公开(公告)日：2024-04-11

申请号：US18507838

申请日：2023-11-13

Applicant: Bytedance Inc.

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

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

CPC classification number: H04N19/12 ,  H04N19/176 ,  H04N19/18 ,  H04N19/60 ,  H04N19/70

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：US11902518B2

公开(公告)日：2024-02-13

申请号：US17835647

申请日：2022-06-08

Applicant: Bytedance Inc.

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

IPC: H04N19/176 ,  H04N19/70 ,  H04N19/117 ,  H04N19/174 ,  H04N19/80 ,  H04N19/186

CPC classification number: H04N19/117 ,  H04N19/174 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70 ,  H04N19/80

Abstract: An example method of video processing includes applying, in a conversion between a video comprising multiple components and a bitstream representation of the video, a deblocking filter to video blocks of the multiple components. A deblocking filter strength for the deblocking filter of each of the multiple components is determined according to a rule that specifies to use a different manner for determining the deblocking filter strength for the video blocks of each of the multiple components.

公开(公告)号：US11876996B2

公开(公告)日：2024-01-16

申请号：US17992287

申请日：2022-11-22

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang

IPC: H04N19/46 ,  H04N19/105 ,  H04N19/172 ,  H04N19/70 ,  H04N19/169 ,  H04N19/423

CPC classification number: H04N19/46 ,  H04N19/105 ,  H04N19/172 ,  H04N19/188 ,  H04N19/423 ,  H04N19/70

Abstract: Methods, systems and devices for defining and using constraints on picture types in video bitstream processing are disclosed. An 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. The format rule specifies that a picture timing (PT) supplemental enhancement information (SEI) message, when included in the bitstream, is access unit (AU) specific, and wherein each picture of the one or more pictures that is a random access skipped leading (RASL) picture includes only a RASL network abstraction layer unit type (NUT).

公开(公告)号：US11863795B2

公开(公告)日：2024-01-02

申请号：US17944332

申请日：2022-09-14

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang

IPC: H04N19/70 ,  H04N19/172 ,  H04N19/169 ,  H04N19/46 ,  H04N19/184 ,  H04N19/187

CPC classification number: H04N19/70 ,  H04N19/172 ,  H04N19/184 ,  H04N19/187 ,  H04N19/188 ,  H04N19/46

Abstract: Methods, devices and systems for configuring different access units in scalable video coding are described. In one example aspect, a method of video processing include performing a conversion between a video including one or more pictures in one or more video layers and a bitstream of a video. The bitstream includes a coded video sequence that includes one or more access units. The bitstream conforms to a format rule that specifies that each access unit of the one or more access units that is a gradual decoding refresh access unit includes exactly one picture for each video layer present in the coded video sequence.

公开(公告)号：US11856215B2

公开(公告)日：2023-12-26

申请号：US18077880

申请日：2022-12-08

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang

IPC: H04N19/37 ,  H04N19/70 ,  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 according to a rule, wherein the bitstream includes network abstraction layer (NAL) units for multiple video layers according to a rule; wherein the rule defines that a sub-bitstream extraction process to generate an output bitstream comprising an output layer set (OLS) includes one or more operations that are selectively performed responsive to the following conditions: (1) a list of NAL unit header layer identifier values in the OLS does not includes all values of NAL unit header layer identifiers in all video coding layer (VCL) NAL units in the bitstream, and (2) the output bitstream containing a supplemental enhancement information (SEI) NAL unit that contains a scalable-nesting SEI message.

公开(公告)号：US11765394B2

公开(公告)日：2023-09-19

申请号：US17859733

申请日：2022-07-07

Applicant: Bytedance Inc.

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

IPC: H04N19/46 ,  H04N19/82 ,  H04N19/187 ,  H04N19/169 ,  H04N19/70 ,  H04N19/91 ,  H04N19/159 ,  H04N19/174 ,  H04N19/184 ,  H04N19/105 ,  H04N19/44 ,  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 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：US11736734B2

公开(公告)日：2023-08-22

申请号：US17957882

申请日：2022-09-30

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang ,  Li Zhang

IPC: H04N19/33 ,  H04N19/52 ,  H04N19/70 ,  H04N19/96 ,  H04N19/105 ,  H04N19/132 ,  H04N19/172 ,  H04N19/174

CPC classification number: H04N19/70 ,  H04N19/105 ,  H04N19/132 ,  H04N19/172 ,  H04N19/174 ,  H04N19/33 ,  H04N19/52 ,  H04N19/96

Abstract: Methods, devices and systems for video coding and encoding, which include conforming to constraints on collocated pictures, are described. One example method of video processing includes performing a conversion between a video including a current picture and a bitstream of the video, wherein the bitstream conforms to a format rule, and wherein the format rule specifies that the bitstream includes a flag for disabling a use of a temporal motion vector prediction tool for the current picture based on whether a reference picture in a decoded picture buffer has a spatial resolution and a scaling window offset that are identical to that of the current picture.