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：US20230027478A1

公开(公告)日：2023-01-26

申请号：US17898073

申请日：2022-08-29

Applicant: Beijing Bytedance Network Technology Co., Ltd. ,  Bytedance Inc.

Inventor： Zhipin Deng ,  Ye-kui Wang ,  Li Zhang ,  Kai Zhang ,  Kui Fan

IPC: H04N19/70 ,  H04N19/122 ,  H04N19/186 ,  H04N19/132 ,  H04N19/139 ,  H04N19/105 ,  H04N19/11 ,  H04N19/61

Abstract: Methods, systems, apparatuses for video processing are described. A method for processing video includes performing a conversion between a video and a bitstream of the video according to a format rule, and wherein the format rule specifies to include, in a general constraint syntax structure associated with the video, one or more general constraint flags indicating whether corresponding syntax elements are included in a sequence parameter set (SPS) and/or a picture parameter set (PPS) and/or a picture header (PH) and/or a slice header (SH) or to constrain values of the syntax elements in the SPS and/or the PPS and/or the PH and/or the SH.

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：US20230007307A1

公开(公告)日：2023-01-05

申请号：US17892866

申请日：2022-08-22

Applicant: Beijing Bytedance Network Technology Co., Ltd. ,  Bytedance Inc.

Inventor： Kai Zhang ,  Li Zhang ,  Ye-kui Wang ,  Zhipin Deng ,  Kui Fan ,  Jizheng Xu ,  Hongbin Liu

IPC: H04N19/70 ,  H04N19/174 ,  H04N19/96

Abstract: A method includes performing a conversion between a video including a video picture including one or more tiles and a bitstream of the video. The video picture refers to a picture parameter set, and the picture parameter set conforms to a format rule specifying that the picture parameter set includes a list of column widths for N tile columns, where N is an integer. An (N−1)-th tile column exists in the video picture and the (N−1)-th tile column has a width that is equal to an (N−1)-th entry in a list of explicitly included tile column widths plus one number of coding tree blocks.

公开(公告)号：US20220400284A1

公开(公告)日：2022-12-15

申请号：US17887283

申请日：2022-08-12

Applicant: Beijing Bytedance Network Technology Co., Ltd. ,  Bytedance Inc.

Inventor： Zhipin Deng ,  Li Zhang ,  Kai Zhang ,  Ye-kui Wang ,  Kui Fan

IPC: H04N19/547 ,  H04N19/70 ,  H04N19/174

Abstract: A method includes performing a conversion between a video comprising a video picture that includes one or more subpictures and a bitstream of the video according to a format rule. The format rule specifies that whether each of the one or more subpictures in the video picture includes a single slice is determined based on a constraint flag.

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：US20220377333A1

公开(公告)日：2022-11-24

申请号：US17867284

申请日：2022-07-18

Applicant: BEIJING BYTEDANCE NETWORK TECHNOLOGY CO., LTD. ,  Bytedance Inc.

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

IPC: H04N19/12 ,  H04N19/60 ,  H04N19/176 ,  H04N19/85 ,  H04N19/196 ,  H04N19/186

Abstract: A method for implementing an adaptive colour transform (ACT) mode during image/video encoding and decoding includes performing a conversion between a current video block of a video and a bitstream of the video, wherein the current video block is coded using the ACT mode, wherein the conversion comprises applying an inverse ACT transform on the current video block according to a rule, and wherein the rule specifies that a clipping operation, based on a bit depth of the current video block, is applied to an input of the inverse ACT transform.

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：US12231659B2

公开(公告)日：2025-02-18

申请号：US17990247

申请日：2022-11-18

Applicant: Beijing Bytedance Network Technology Co., Ltd. ,  Bytedance Inc.

Inventor： Ye-kui Wang ,  Zhipin Deng

IPC: H04N19/196 ,  H04N19/117 ,  H04N19/167 ,  H04N19/172 ,  H04N19/70 ,  H04N19/82

Abstract: Methods, apparatus, systems for performing video processing such as video encoding, video decoding, or video transcoding are described. One example method of video processing includes performing a conversion between a video comprising one or more video layers and a bitstream of the video according to a rule. The rule specifies that responsive to a value of a first field in a sequence parameter set (SPS) that is referred to by a video layer, a second field in a video parameter set referred to by the SPS that is indicative of a maximum number of sublayers allowed in the bitstream is construed to be equal to a third field in the SPS. The third field is indicative of a maximum number of sublayers allowed in the video layer.